September 2021 - vsnet-grb-info - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-grb-info 28690] GECAM observation of a burst from SGR J1935+2154
by GCN Circulars 09 Sep '21

09 Sep '21

TITLE: GCN CIRCULAR NUMBER: 30793 SUBJECT: GECAM observation of a burst from SGR J1935+2154 DATE: 21/09/10 01:35:01 GMT FROM: Shuo Xiao at IHEP <xiaoshuo(a)ihep.ac.cn> S. Xiao, S. L. Xiong, Y. Zhao, X. Y. Zhao, Y. Huang, X. Y. Song, C. Cai, S. L. Xie, Y. Q. Zhang, Z. W. Guo, J. C. Liu, C. Zheng, W. C. Xue, C. Y. Li, C. W. Wang, Q. B. Yi, B. X. Zhang, P. Zhang, W. X. Peng, R. Qiao, D. Y. Guo, X. B. Li, X. Ma, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, J. J. He, G. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang, L. M. Song, F. J. Lu, S. N. Zhang (IHEP), report on behalf of GECAM team: During the commissioning phase, GECAM-B was triggered in-flight by a bright short burst (trig# 84920832) at 2021-09-09T21:07:12.150 UTC (T0), Its alert data was promptly downlinked to the ground through the short message service of BeiDou Navigation Satellite System (BDS). The time latency of the first BeiDou message relative to the trigger time is about 1 minute. According to the GECAM-B light curves in about 15-65 keV, this burst mainly consists of a single pulse with a duration about 100 ms. The location is consistent with SGR J1935+2154 within the error. The GECAM light curve could be found here: http://twiki.ihep.ac.cn/pub/GECAM/GRBList/utn210909_210712_GECAMb.png Please note that all GECAM results here are preliminary. The final analysis will be published in journal papers or GECAM online catalog. Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time), which was funded by the Chinese Academy of Sciences (CAS).

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[vsnet-grb-info 28689] Fermi trigger No 652927551: Global MASTER-Net observations report
by GCN Circulars 09 Sep '21

09 Sep '21

TITLE: GCN CIRCULAR NUMBER: 30792 SUBJECT: Fermi trigger No 652927551: Global MASTER-Net observations report DATE: 21/09/10 01:30:33 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB210910.03 (trigger No 652927551,20h 06m 48.00s , +17d 45m 36.0s, R=1) errorbox 68 sec after trigger time at 2021-09-10 00:46:55 UT, with upper limit up to 15.9 mag. The observations began at zenith distance = 86 deg. The sun altitude is -21.1 deg. MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB210910.03 errorbox 126 sec after trigger time at 2021-09-10 00:47:53 UT, with upper limit up to 18.2 mag. The observations began at zenith distance = 52 deg. The sun altitude is -31.5 deg. The galactic latitude b = -8 deg., longitude l = 58 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1715785 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 73 | 2021-09-10 00:46:55 | MASTER-Kislovodsk | (20h 06m 54.92s , +17d 43m 28.7s) | P- | 10 | 14.6 | 73 | 2021-09-10 00:46:55 | MASTER-Kislovodsk | (20h 07m 21.30s , +18d 07m 03.2s) | P| | 10 | 14.7 | 93 | 2021-09-10 00:46:55 | MASTER-Kislovodsk | (20h 07m 21.25s , +18d 07m 02.6s) | P| | 50 | 15.5 | Coadd 293 | 2021-09-10 00:46:55 | MASTER-Kislovodsk | (20h 07m 21.30s , +18d 07m 03.2s) | P| | 450 | 15.8 | Coadd 108 | 2021-09-10 00:47:25 | MASTER-Kislovodsk | (20h 06m 59.57s , +17d 42m 25.4s) | P- | 20 | 15.2 | 133 | 2021-09-10 00:47:25 | MASTER-Kislovodsk | (20h 06m 59.60s , +17d 42m 25.9s) | P- | 70 | 15.5 | Coadd 108 | 2021-09-10 00:47:25 | MASTER-Kislovodsk | (20h 07m 26.03s , +18d 06m 00.4s) | P| | 20 | 15.3 | 136 | 2021-09-10 00:47:53 | MASTER-OAFA | (20h 04m 21.05s , +20d 34m 02.9s) | C | 20 | 17.0 | 149 | 2021-09-10 00:48:05 | MASTER-Kislovodsk | (20h 06m 53.73s , +17d 41m 22.6s) | P- | 20 | 15.2 | 149 | 2021-09-10 00:48:05 | MASTER-Kislovodsk | (20h 07m 20.50s , +18d 04m 59.7s) | P| | 20 | 15.1 | 181 | 2021-09-10 00:48:32 | MASTER-OAFA | (20h 04m 24.67s , +20d 35m 55.0s) | C | 30 | 17.2 | 194 | 2021-09-10 00:48:45 | MASTER-Kislovodsk | (20h 07m 00.45s , +17d 41m 24.0s) | P- | 30 | 15.1 | 194 | 2021-09-10 00:48:45 | MASTER-Kislovodsk | (20h 07m 27.28s , +18d 04m 59.6s) | P| | 30 | 15.4 | 244 | 2021-09-10 00:48:45 | MASTER-Kislovodsk | (20h 07m 27.22s , +18d 04m 58.9s) | P| | 130 | 15.9 | Coadd 235 | 2021-09-10 00:49:22 | MASTER-OAFA | (20h 04m 18.22s , +20d 34m 59.7s) | C | 40 | 17.4 | 249 | 2021-09-10 00:49:35 | MASTER-Kislovodsk | (20h 06m 57.46s , +17d 43m 11.7s) | P- | 40 | 15.3 | 249 | 2021-09-10 00:49:35 | MASTER-Kislovodsk | (20h 07m 24.40s , +18d 06m 47.7s) | P| | 40 | 15.5 | 299 | 2021-09-10 00:50:21 | MASTER-OAFA | (20h 04m 17.89s , +20d 35m 58.7s) | C | 50 | 17.5 | 319 | 2021-09-10 00:50:36 | MASTER-Kislovodsk | (20h 06m 57.28s , +17d 41m 14.5s) | P- | 60 | 15.3 | 319 | 2021-09-10 00:50:36 | MASTER-Kislovodsk | (20h 07m 24.58s , +18d 04m 53.6s) | P| | 60 | 15.8 | 374 | 2021-09-10 00:51:30 | MASTER-OAFA | (20h 04m 24.38s , +20d 34m 58.4s) | C | 60 | 17.5 | 404 | 2021-09-10 00:51:56 | MASTER-Kislovodsk | (20h 07m 00.21s , +17d 42m 39.0s) | P- | 70 | 15.3 | 404 | 2021-09-10 00:51:56 | MASTER-Kislovodsk | (20h 07m 27.68s , +18d 06m 19.8s) | P| | 70 | 15.6 | 504 | 2021-09-10 00:51:56 | MASTER-Kislovodsk | (20h 07m 27.67s , +18d 06m 19.6s) | P| | 270 | 15.8 | Coadd 505 | 2021-09-10 00:53:26 | MASTER-Kislovodsk | (20h 06m 53.29s , +17d 41m 58.8s) | P- | 90 | 15.4 | 505 | 2021-09-10 00:53:26 | MASTER-Kislovodsk | (20h 07m 21.05s , +18d 05m 42.3s) | P| | 90 | 15.6 | 625 | 2021-09-10 00:55:16 | MASTER-Kislovodsk | (20h 06m 53.09s , +17d 42m 52.5s) | P- | 110 | 15.4 | 625 | 2021-09-10 00:55:16 | MASTER-Kislovodsk | (20h 07m 21.34s , +18d 06m 40.4s) | P| | 110 | 15.7 | 672 | 2021-09-10 00:55:59 | MASTER-OAFA | (20h 05m 07.45s , +16d 59m 57.7s) | C | 120 | 18.1 | 770 | 2021-09-10 00:57:27 | MASTER-Kislovodsk | (20h 06m 58.90s , +17d 41m 51.1s) | P- | 140 | 15.3 | 770 | 2021-09-10 00:57:27 | MASTER-Kislovodsk | (20h 07m 27.73s , +18d 05m 44.2s) | P| | 140 | 15.4 | 821 | 2021-09-10 00:58:18 | MASTER-OAFA | (20h 05m 11.45s , +17d 01m 07.4s) | C | 140 | 18.1 | 946 | 2021-09-10 01:00:07 | MASTER-Kislovodsk | (20h 06m 53.13s , +17d 40m 45.5s) | P- | 170 | 15.1 | 946 | 2021-09-10 01:00:07 | MASTER-Kislovodsk | (20h 07m 23.38s , +18d 04m 54.3s) | P| | 170 | 14.9 | 1001 | 2021-09-10 01:00:57 | MASTER-OAFA | (20h 05m 03.89s , +17d 00m 35.9s) | C | 180 | 18.2 | 1141 | 2021-09-10 01:03:17 | MASTER-Kislovodsk | (20h 06m 59.88s , +17d 41m 07.3s) | P- | 180 | 14.9 | 1200 | 2021-09-10 01:04:16 | MASTER-OAFA | (20h 05m 03.93s , +17d 01m 35.1s) | C | 180 | 18.2 | 1341 | 2021-09-10 01:06:38 | MASTER-Kislovodsk | (20h 06m 56.71s , +17d 42m 22.7s) | P- | 180 | 14.2 | 1400 | 2021-09-10 01:07:36 | MASTER-OAFA | (20h 05m 09.73s , +17d 00m 34.7s) | C | 180 | 18.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.

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[vsnet-grb-info 28688] GRB 210619B: Maidanak and Assy optical observations, broken power law parametrization
by GCN Circulars 09 Sep '21

09 Sep '21

TITLE: GCN CIRCULAR NUMBER: 30791 SUBJECT: GRB 210619B: Maidanak and Assy optical observations, broken power law parametrization DATE: 21/09/09 21:25:26 GMT FROM: Alexei Pozanenko at IKI, Moscow <apozanen(a)iki.rssi.ru> S. Belkin (IKI), A. Pozanenko (IKI), O. Burhonov (UBAI), V. Kim (FAI, HSE), M. Krugov (FAI), N. Pankov (HSE), Sh. Ehgamberdiev (UBAI), report on behalf of IKI-GRB-FuN: We observed the field of GRB 210619B (D'Avanzo et al. GCN 30261) with AZT-22 telescope of Maidanak Observatory and AZT-20 telescope of Assy-Turgen observatory. The optical afterglow (D'Avanzo et al. GCN 30261; Jelinek et al., GCN 30263; Kong, GCN 30265; Pellegrin et al., GCN 30268; Perley, GCN 30271; Zheng and Filippenko, GCN 30273; Blazek et al., GCN 30274; Kann et al., GCN 30275; Xin et al., GCN 30277; Kiun et al., GCN 30278; Shrestha et al., GCN 30280; Jelkinek et al., GCN 30281; Kumar et al., GCN 30286; D'Avanzo et al., GCN 30288; Moskvitin and Maslennikova, GCN 303291; Romanov, GCN 30292; Hu et al., GCN 30293; Zhu et al., GCN 30294; Belkin et al., GCN 30299; Moskvitin and Maslennikova, GCN 30303; Romanov and Lane, GCN 30305; Moskvitin and Maslennikova, GCN 30309; Vinko et al., GCN 30320; Kann et al., GCN 30338; Zaznobin et al., GCN 30343) is clearly detected on the most of stacked images. Preliminary photometry of the afterglow of some of observations is following. Date UT start t-T0 Filter Exp. OT UL(3sigma) Telescope (mid, days) (s) 2021-06-20 19:02:53 0.79963 R 8*300 19.47 0.06 23.0 AZT-22 2021-06-21 19:53:41 1.85019 R 12*300 20.43 0.05 23.2 AZT-22 2021-06-22 17:15:29 2.74206 r 75*60 21.82 0.26 22.6 AZT-20 2021-06-22 18:35:45 2.79606 R 12*300 21.21 0.09 23.1 AZT-22 2021-06-26 20:15:18 6.86520 R 20*180 22.55 0.24 23.2 AZT-22 2021-07-02 20:16:53 12.86630 R 12*300 23.5 0.3 23.5 AZT-22 2021-07-08 19:16:40 18.83003 r 76*60 n/d n/d 23.2 AZT-20 2021-07-18 19:50:46 28.84816 R 12*300 n/d n/d 23.9 AZT-22 Photometry is based on the USNO-B1.0 and PanSTARRS-PS1 nearby stars. USNO-B1.0_id R2 I 1238-0493928 15.08 14.33 1238-0494511 15.67 15.03 1238-0493842 17.53 17.36 1238-0493787 16.81 16.12 PanSTARRS-PS1 RA DEC r 21:18:52.24182 +33:49:14.6348 15.2925 21:18:45.71408 +33:50:40.3319 18.1642 Using our data and those published in the GCN circulars cited above we plot a light curve which an be found at http://grb.rssi.ru/GRB210619B/GRB210619B_LC_all.png Using only Maidanak data after 0.7 days, it was found that the light curve can be fitted by a single power law with the index alpha = -1.48 +/-0.04. Using early data published in GCNs we can describe the LC by a broken power law with parameters of alpha = -0.72+/-0.01, beta = -1.52 +/-0.04, and break time of 0.57+/-0.12. The fitted LC can be found at http://grb.rssi.ru/GRB210619B/GRB210619B_AZT22_LC.png It confirms the steeping decay suggested by Jelinek et al., GCN 30281, Kumar et al., GCN 30286. The power-law index before the break is approximately the same as that obtained by Kann et al., GCN 30338 and Oganesyan et al., arXiv:2109.00010, while the power law index after the break is steeper and coincides with XRT afterglow power law index. We also not detected any influence of host galaxy on afterglow light curve, and after late time observations we can estimate brightness of the host galaxy R > 23.9.

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[vsnet-grb-info 28687] Fermi trigger No 652911693: Global MASTER-Net observations report
by GCN Circulars 09 Sep '21

09 Sep '21

TITLE: GCN CIRCULAR NUMBER: 30790 SUBJECT: Fermi trigger No 652911693: Global MASTER-Net observations report DATE: 21/09/09 21:15:15 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB210909.85 (trigger No 652911693,18h 03m 28.01s , +35d 31m 59.9s, R=28.65) errorbox 64 sec after trigger time at 2021-09-09 20:22:32 UT, with upper limit up to 18.2 mag. The observations began at zenith distance = 37 deg. The sun altitude is -40.8 deg. MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB210909.85 errorbox 71 sec after trigger time at 2021-09-09 20:22:39 UT, with upper limit up to 18.8 mag. The observations began at zenith distance = 33 deg. The sun altitude is -37.9 deg. The galactic latitude b = 24 deg., longitude l = 62 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1715464 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 94 | 2021-09-09 20:22:32 | MASTER-Kislovodsk | (19h 32m 52.68s , +29d 41m 05.2s) | C | 60 | 17.1 | 94 | 2021-09-09 20:22:32 | MASTER-Kislovodsk | (19h 27m 57.20s , +30d 03m 55.6s) | C | 60 | 17.5 | 101 | 2021-09-09 20:22:39 | MASTER-Tavrida | (19h 03m 09.39s , +37d 03m 46.0s) | C | 60 | 18.6 | 174 | 2021-09-09 20:23:52 | MASTER-Kislovodsk | (19h 38m 20.31s , +31d 36m 32.7s) | C | 60 | 17.0 | 180 | 2021-09-09 20:23:58 | MASTER-Tavrida | (19h 23m 16.62s , +33d 14m 47.2s) | C | 60 | 18.3 | 255 | 2021-09-09 20:25:13 | MASTER-Kislovodsk | (19h 28m 51.17s , +27d 47m 49.6s) | C | 60 | 17.0 | 255 | 2021-09-09 20:25:13 | MASTER-Kislovodsk | (19h 24m 02.38s , +28d 10m 39.0s) | C | 60 | 17.5 | 335 | 2021-09-09 20:26:33 | MASTER-Kislovodsk | (19h 45m 04.20s , +37d 18m 56.8s) | C | 60 | 17.2 | 335 | 2021-09-09 20:26:33 | MASTER-Kislovodsk | (19h 39m 37.39s , +37d 41m 45.2s) | C | 60 | 17.9 | 405 | 2021-09-09 20:27:42 | MASTER-Tavrida | (19h 41m 13.51s , +35d 10m 49.1s) | C | 60 | 18.0 | 415 | 2021-09-09 20:27:53 | MASTER-Kislovodsk | (19h 41m 51.99s , +24d 00m 03.2s) | C | 60 | 17.4 | 415 | 2021-09-09 20:27:53 | MASTER-Kislovodsk | (19h 37m 13.23s , +24d 22m 49.9s) | C | 60 | 17.6 | 484 | 2021-09-09 20:29:02 | MASTER-Tavrida | (19h 32m 58.27s , +33d 15m 39.5s) | C | 60 | 17.9 | 495 | 2021-09-09 20:29:13 | MASTER-Kislovodsk | (19h 37m 13.49s , +39d 10m 48.0s) | C | 60 | 17.5 | 495 | 2021-09-09 20:29:13 | MASTER-Kislovodsk | (19h 31m 38.45s , +39d 33m 34.4s) | C | 60 | 18.1 | 563 | 2021-09-09 20:30:21 | MASTER-Tavrida | (19h 13m 06.68s , +37d 02m 31.6s) | C | 60 | 18.4 | 576 | 2021-09-09 20:30:33 | MASTER-Kislovodsk | (19h 16m 35.73s , +35d 22m 38.6s) | C | 60 | 17.4 | 576 | 2021-09-09 20:30:34 | MASTER-Kislovodsk | (19h 11m 20.76s , +35d 45m 25.9s) | C | 60 | 17.9 | 642 | 2021-09-09 20:31:40 | MASTER-Tavrida | (18h 58m 57.12s , +31d 21m 56.1s) | C | 60 | 18.4 | 656 | 2021-09-09 20:31:54 | MASTER-Kislovodsk | (20h 03m 29.08s , +33d 30m 59.0s) | C | 60 | 17.0 | 656 | 2021-09-09 20:31:54 | MASTER-Kislovodsk | (19h 58m 17.94s , +33d 53m 54.9s) | C | 60 | 17.4 | 721 | 2021-09-09 20:32:59 | MASTER-Tavrida | (19h 08m 20.15s , +31d 20m 33.5s) | C | 60 | 18.4 | 736 | 2021-09-09 20:33:14 | MASTER-Kislovodsk | (18h 52m 33.53s , +25d 52m 11.9s) | C | 60 | 17.2 | 736 | 2021-09-09 20:33:14 | MASTER-Kislovodsk | (18h 47m 55.04s , +26d 14m 51.6s) | C | 60 | 17.9 | 800 | 2021-09-09 20:34:18 | MASTER-Tavrida | (19h 13m 50.48s , +38d 58m 06.0s) | C | 60 | 18.8 | 816 | 2021-09-09 20:34:34 | MASTER-Kislovodsk | (20h 03m 21.09s , +27d 48m 44.4s) | C | 60 | 17.4 | 817 | 2021-09-09 20:34:34 | MASTER-Kislovodsk | (19h 58m 30.96s , +28d 11m 50.1s) | C | 60 | 17.6 | 879 | 2021-09-09 20:35:37 | MASTER-Tavrida | (19h 24m 03.73s , +38d 57m 27.6s) | C | 60 | 18.7 | 897 | 2021-09-09 20:35:54 | MASTER-Kislovodsk | (19h 53m 48.01s , +35d 23m 55.7s) | C | 60 | 16.8 | 897 | 2021-09-09 20:35:55 | MASTER-Kislovodsk | (19h 48m 30.44s , +35d 46m 47.1s) | C | 60 | 17.2 | 958 | 2021-09-09 20:36:56 | MASTER-Tavrida | (19h 05m 03.86s , +33d 16m 10.7s) | C | 60 | 18.5 | 977 | 2021-09-09 20:37:15 | MASTER-Kislovodsk | (19h 20m 22.40s , +31d 36m 25.0s) | C | 60 | 17.3 | 977 | 2021-09-09 20:37:15 | MASTER-Kislovodsk | (19h 15m 23.04s , +31d 59m 11.9s) | C | 60 | 17.9 | 1037 | 2021-09-09 20:38:15 | MASTER-Tavrida | (19h 14m 45.18s , +33d 15m 10.9s) | C | 60 | 18.5 | 1057 | 2021-09-09 20:38:35 | MASTER-Kislovodsk | (19h 32m 55.10s , +29d 41m 37.4s) | C | 60 | 17.0 | 1057 | 2021-09-09 20:38:35 | MASTER-Kislovodsk | (19h 28m 01.44s , +30d 04m 25.2s) | C | 60 | 17.5 | 1116 | 2021-09-09 20:39:34 | MASTER-Tavrida | (19h 23m 15.24s , +33d 14m 11.3s) | C | 60 | 18.3 | 1137 | 2021-09-09 20:39:55 | MASTER-Kislovodsk | (19h 38m 14.78s , +31d 34m 38.1s) | C | 60 | 17.0 | 1137 | 2021-09-09 20:39:55 | MASTER-Kislovodsk | (19h 33m 14.30s , +31d 57m 34.5s) | C | 60 | 17.5 | 1195 | 2021-09-09 20:40:53 | MASTER-Tavrida | (19h 31m 29.51s , +35d 08m 23.2s) | C | 60 | 18.2 | 1218 | 2021-09-09 20:41:16 | MASTER-Kislovodsk | (19h 28m 57.54s , +27d 47m 01.0s) | C | 60 | 17.0 | 1218 | 2021-09-09 20:41:16 | MASTER-Kislovodsk | (19h 24m 10.67s , +28d 09m 47.3s) | C | 60 | 17.4 | 1298 | 2021-09-09 20:42:36 | MASTER-Kislovodsk | (19h 45m 07.52s , +37d 18m 17.1s) | C | 60 | 17.2 | 1298 | 2021-09-09 20:42:36 | MASTER-Kislovodsk | (19h 39m 42.67s , +37d 41m 04.3s) | C | 60 | 17.8 | 1378 | 2021-09-09 20:43:56 | MASTER-Kislovodsk | (19h 41m 47.68s , +23d 59m 01.1s) | C | 60 | 17.4 | 1378 | 2021-09-09 20:43:56 | MASTER-Kislovodsk | (19h 37m 10.74s , +24d 21m 44.6s) | C | 60 | 17.6 | 1416 | 2021-09-09 20:44:34 | MASTER-Tavrida | (19h 51m 29.99s , +27d 34m 07.2s) | C | 60 | 17.6 | 1458 | 2021-09-09 20:45:16 | MASTER-Kislovodsk | (19h 37m 18.95s , +39d 12m 19.8s) | C | 60 | 17.5 | 1458 | 2021-09-09 20:45:16 | MASTER-Kislovodsk | (19h 31m 45.81s , +39d 35m 05.1s) | C | 60 | 18.0 | 1495 | 2021-09-09 20:45:53 | MASTER-Tavrida | (19h 41m 19.15s , +35d 09m 08.4s) | C | 60 | 18.0 | 1539 | 2021-09-09 20:46:37 | MASTER-Kislovodsk | (19h 11m 16.44s , +35d 45m 55.5s) | C | 60 | 17.9 | 1539 | 2021-09-09 20:46:37 | MASTER-Kislovodsk | (19h 16m 29.38s , +35d 23m 10.1s) | C | 60 | 17.4 | 1575 | 2021-09-09 20:47:12 | MASTER-Tavrida | (19h 32m 51.84s , +33d 13m 58.8s) | C | 60 | 18.0 | 1619 | 2021-09-09 20:47:57 | MASTER-Kislovodsk | (20h 03m 24.33s , +33d 30m 52.8s) | C | 60 | 17.0 | 1619 | 2021-09-09 20:47:57 | MASTER-Kislovodsk | (19h 58m 14.90s , +33d 53m 47.1s) | C | 60 | 17.3 | 1654 | 2021-09-09 20:48:31 | MASTER-Tavrida | (18h 59m 01.48s , +31d 20m 00.2s) | C | 60 | 18.5 | 1699 | 2021-09-09 20:49:17 | MASTER-Kislovodsk | (18h 52m 36.81s , +25d 52m 48.7s) | C | 60 | 17.2 | 1699 | 2021-09-09 20:49:17 | MASTER-Kislovodsk | (18h 48m 00.26s , +26d 15m 21.8s) | C | 60 | 17.8 | 1733 | 2021-09-09 20:49:51 | MASTER-Tavrida | (19h 08m 20.48s , +31d 21m 27.6s) | C | 60 | 18.3 | 1779 | 2021-09-09 20:50:37 | MASTER-Kislovodsk | (20h 03m 13.58s , +27d 46m 56.1s) | C | 60 | 17.4 | 1779 | 2021-09-09 20:50:37 | MASTER-Kislovodsk | (19h 58m 25.26s , +28d 10m 01.4s) | C | 60 | 17.6 | 1812 | 2021-09-09 20:51:10 | MASTER-Tavrida | (19h 39m 45.86s , +25d 39m 38.7s) | C | 60 | 17.8 | 1860 | 2021-09-09 20:51:58 | MASTER-Kislovodsk | (19h 09m 29.45s , +25d 52m 21.5s) | C | 60 | 17.2 | 1860 | 2021-09-09 20:51:58 | MASTER-Kislovodsk | (19h 04m 51.48s , +26d 14m 58.1s) | C | 60 | 17.7 | 1891 | 2021-09-09 20:52:29 | MASTER-Tavrida | (19h 48m 31.88s , +25d 38m 45.8s) | C | 60 | 18.5 | 1940 | 2021-09-09 20:53:18 | MASTER-Kislovodsk | (19h 25m 59.78s , +37d 17m 44.4s) | C | 60 | 17.4 | 1940 | 2021-09-09 20:53:18 | MASTER-Kislovodsk | (19h 20m 38.51s , +37d 40m 36.3s) | C | 60 | 18.0 | 1970 | 2021-09-09 20:53:47 | MASTER-Tavrida | (19h 05m 03.21s , +33d 15m 32.1s) | C | 60 | 18.3 | 2020 | 2021-09-09 20:54:38 | MASTER-Kislovodsk | (19h 56m 07.61s , +31d 34m 54.4s) | C | 60 | 16.8 | 2020 | 2021-09-09 20:54:38 | MASTER-Kislovodsk | (19h 51m 07.17s , +31d 57m 44.2s) | C | 60 | 17.0 | 2049 | 2021-09-09 20:55:07 | MASTER-Tavrida | (19h 14m 44.10s , +33d 14m 33.2s) | C | 60 | 18.4 | 2100 | 2021-09-09 20:55:58 | MASTER-Kislovodsk | (19h 25m 10.87s , +24d 00m 11.3s) | C | 60 | 17.3 | 2100 | 2021-09-09 20:55:58 | MASTER-Kislovodsk | (19h 20m 36.81s , +24d 22m 47.7s) | C | 60 | 17.6 | 2128 | 2021-09-09 20:56:26 | MASTER-Tavrida | (19h 31m 25.12s , +35d 07m 39.4s) | C | 60 | 18.2 | 2180 | 2021-09-09 20:57:18 | MASTER-Kislovodsk | (19h 06m 50.12s , +37d 16m 48.7s) | C | 60 | 17.4 | 2180 | 2021-09-09 20:57:18 | MASTER-Kislovodsk | (19h 01m 31.73s , +37d 39m 44.7s) | C | 60 | 18.0 | 2207 | 2021-09-09 20:57:45 | MASTER-Tavrida | (19h 42m 33.99s , +27d 31m 57.5s) | C | 60 | 17.4 | 2260 | 2021-09-09 20:58:38 | MASTER-Kislovodsk | (18h 57m 51.20s , +35d 23m 37.0s) | C | 60 | 17.3 | 2260 | 2021-09-09 20:58:38 | MASTER-Kislovodsk | (18h 52m 42.19s , +35d 46m 22.0s) | C | 60 | 17.9 | 2340 | 2021-09-09 20:59:58 | MASTER-Kislovodsk | (19h 17m 41.03s , +39d 10m 57.4s) | C | 60 | 17.5 | 2340 | 2021-09-09 20:59:58 | MASTER-Kislovodsk | (19h 12m 12.22s , +39d 33m 44.5s) | C | 60 | 18.2 | 2420 | 2021-09-09 21:01:18 | MASTER-Kislovodsk | (18h 44m 39.26s , +31d 33m 17.3s) | C | 60 | 17.5 | 2420 | 2021-09-09 21:01:18 | MASTER-Kislovodsk | (18h 39m 47.17s , +31d 55m 49.2s) | C | 60 | 18.1 | 2429 | 2021-09-09 21:01:27 | MASTER-Tavrida | (19h 00m 00.51s , +27d 33m 09.9s) | C | 60 | 18.0 | 2500 | 2021-09-09 21:02:38 | MASTER-Kislovodsk | (19h 08m 32.21s , +23d 58m 03.7s) | C | 60 | 17.2 | 2500 | 2021-09-09 21:02:38 | MASTER-Kislovodsk | (19h 04m 00.89s , +24d 20m 39.3s) | C | 60 | 17.7 | 2509 | 2021-09-09 21:02:47 | MASTER-Tavrida | (19h 51m 36.40s , +27d 32m 26.1s) | C | 60 | 17.1 | 2580 | 2021-09-09 21:03:58 | MASTER-Kislovodsk | (18h 47m 44.53s , +37d 17m 16.9s) | C | 60 | 17.2 | 2580 | 2021-09-09 21:03:58 | MASTER-Kislovodsk | (18h 42m 29.32s , +37d 40m 03.4s) | C | 60 | 18.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.

1 0

[vsnet-grb-info 28686] Fermi trigger No 652906639: Global MASTER-Net observations report
by GCN Circulars 09 Sep '21

09 Sep '21

TITLE: GCN CIRCULAR NUMBER: 30789 SUBJECT: Fermi trigger No 652906639: Global MASTER-Net observations report DATE: 21/09/09 20:30:41 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB210909.79 (trigger No 652906639,19h 25m 43.20s , +30d 51m 36.0s, R=4.24) errorbox 10 sec after notice time and 62 sec after trigger time at 2021-09-09 18:58:17 UT, with upper limit up to 18.4 mag. The observations began at zenith distance = 63 deg. The sun altitude is -32.6 deg. MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB210909.79 errorbox 49 sec after notice time and 101 sec after trigger time at 2021-09-09 18:58:56 UT, with upper limit up to 18.3 mag. The observations began at zenith distance = 23 deg. The sun altitude is -33.7 deg. MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB210909.79 errorbox 50 sec after notice time and 103 sec after trigger time at 2021-09-09 18:58:58 UT, with upper limit up to 18.1 mag. The observations began at zenith distance = 18 deg. The sun altitude is -29.0 deg. The galactic latitude b = 7 deg., longitude l = 64 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1715387 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 68 | 2021-09-09 18:58:17 | MASTER-SAAO | (19h 27m 04.00s , +30d 44m 13.8s) | C | 10 | 17.3 | 88 | 2021-09-09 18:58:17 | MASTER-SAAO | (19h 27m 04.00s , +30d 44m 13.9s) | C | 50 | 18.0 | Coadd 102 | 2021-09-09 18:58:47 | MASTER-SAAO | (19h 26m 58.45s , +30d 43m 16.6s) | C | 20 | 17.6 | 112 | 2021-09-09 18:58:56 | MASTER-Kislovodsk | (19h 26m 07.27s , +30d 52m 13.8s) | C | 20 | 16.7 | 147 | 2021-09-09 18:58:56 | MASTER-Kislovodsk | (19h 26m 07.27s , +30d 52m 13.9s) | C | 90 | 17.3 | Coadd 112 | 2021-09-09 18:58:56 | MASTER-Kislovodsk | (19h 21m 02.96s , +31d 15m 34.5s) | C | 20 | 17.4 | 147 | 2021-09-09 18:58:56 | MASTER-Kislovodsk | (19h 21m 02.96s , +31d 15m 34.5s) | C | 90 | 18.0 | Coadd 113 | 2021-09-09 18:58:58 | MASTER-Tavrida | (19h 27m 14.43s , +30d 41m 18.9s) | C | 20 | 17.4 | 148 | 2021-09-09 18:58:58 | MASTER-Tavrida | (19h 27m 14.44s , +30d 41m 19.0s) | C | 90 | 17.9 | Coadd 142 | 2021-09-09 18:59:26 | MASTER-SAAO | (19h 27m 04.80s , +30d 43m 28.9s) | C | 20 | 17.7 | 157 | 2021-09-09 18:59:36 | MASTER-Kislovodsk | (19h 26m 07.27s , +30d 53m 12.5s) | C | 30 | 16.8 | 157 | 2021-09-09 18:59:36 | MASTER-Kislovodsk | (19h 21m 02.91s , +31d 16m 33.9s) | C | 30 | 17.6 | 157 | 2021-09-09 18:59:37 | MASTER-Tavrida | (19h 27m 07.91s , +30d 40m 24.8s) | C | 30 | 17.6 | 186 | 2021-09-09 19:00:06 | MASTER-SAAO | (19h 27m 01.93s , +30d 44m 58.6s) | C | 30 | 17.8 | 231 | 2021-09-09 19:00:06 | MASTER-SAAO | (19h 27m 01.93s , +30d 44m 58.4s) | C | 120 | 18.0 | Coadd 212 | 2021-09-09 19:00:26 | MASTER-Kislovodsk | (19h 26m 14.21s , +30d 52m 13.6s) | C | 40 | 17.0 | 212 | 2021-09-09 19:00:26 | MASTER-Tavrida | (19h 27m 08.28s , +30d 41m 21.8s) | C | 40 | 17.7 | 212 | 2021-09-09 19:00:26 | MASTER-Kislovodsk | (19h 21m 09.87s , +31d 15m 35.6s) | C | 40 | 17.7 | 241 | 2021-09-09 19:00:55 | MASTER-SAAO | (19h 27m 02.34s , +30d 43m 50.3s) | C | 40 | 17.3 | 277 | 2021-09-09 19:01:26 | MASTER-Kislovodsk | (19h 26m 08.46s , +30d 51m 12.9s) | C | 50 | 17.1 | 277 | 2021-09-09 19:01:26 | MASTER-Kislovodsk | (19h 21m 04.18s , +31d 14m 35.0s) | C | 50 | 17.8 | 306 | 2021-09-09 19:01:55 | MASTER-SAAO | (19h 27m 04.77s , +30d 45m 17.0s) | C | 50 | 17.9 | 385 | 2021-09-09 19:03:05 | MASTER-SAAO | (19h 27m 00.26s , +30d 44m 30.9s) | C | 70 | 18.0 | 470 | 2021-09-09 19:04:34 | MASTER-SAAO | (19h 16m 47.96s , +31d 29m 32.8s) | C | 60 | 17.8 | 510 | 2021-09-09 19:05:14 | MASTER-Tavrida | (19h 24m 23.18s , +29d 53m 08.5s) | C | 60 | 17.5 | 519 | 2021-09-09 19:05:23 | MASTER-Kislovodsk | (19h 15m 23.16s , +29d 41m 35.6s) | C | 60 | 17.2 | 519 | 2021-09-09 19:05:23 | MASTER-Kislovodsk | (19h 10m 23.50s , +30d 04m 47.1s) | C | 60 | 18.2 | 550 | 2021-09-09 19:05:54 | MASTER-SAAO | (19h 26m 02.38s , +31d 28m 06.5s) | C | 60 | 17.9 | 589 | 2021-09-09 19:06:34 | MASTER-Tavrida | (19h 33m 41.36s , +29d 53m 17.4s) | C | 60 | 17.3 | 599 | 2021-09-09 19:06:43 | MASTER-Kislovodsk | (19h 27m 06.18s , +33d 31m 20.5s) | C | 60 | 17.2 | 599 | 2021-09-09 19:06:43 | MASTER-Kislovodsk | (19h 21m 51.72s , +33d 54m 41.5s) | C | 60 | 18.0 | 629 | 2021-09-09 19:07:14 | MASTER-SAAO | (19h 34m 29.15s , +31d 29m 29.5s) | C | 60 | 17.6 | 679 | 2021-09-09 19:08:04 | MASTER-Kislovodsk | (19h 11m 41.45s , +27d 48m 30.6s) | C | 60 | 17.1 | 679 | 2021-09-09 19:08:04 | MASTER-Kislovodsk | (19h 06m 48.09s , +28d 11m 34.9s) | C | 60 | 18.0 | 759 | 2021-09-09 19:09:24 | MASTER-Kislovodsk | (19h 03m 33.53s , +33d 54m 38.0s) | C | 60 | 18.2 | 759 | 2021-09-09 19:09:24 | MASTER-Kislovodsk | (19h 08m 46.79s , +33d 31m 19.7s) | C | 60 | 17.3 | 839 | 2021-09-09 19:10:44 | MASTER-Kislovodsk | (19h 45m 20.95s , +33d 30m 40.7s) | C | 60 | 16.6 | 839 | 2021-09-09 19:10:44 | MASTER-Kislovodsk | (19h 40m 05.45s , +33d 54m 04.1s) | C | 60 | 17.6 | 911 | 2021-09-09 19:11:55 | MASTER-SAAO | (19h 43m 54.04s , +31d 28m 43.6s) | C | 60 | 17.2 | 920 | 2021-09-09 19:12:04 | MASTER-Kislovodsk | (19h 35m 11.43s , +35d 23m 35.5s) | C | 60 | 17.2 | 920 | 2021-09-09 19:12:04 | MASTER-Kislovodsk | (19h 29m 48.53s , +35d 46m 55.7s) | C | 60 | 18.0 | 939 | 2021-09-09 19:12:23 | MASTER-Tavrida | (19h 29m 33.74s , +28d 00m 45.1s) | C | 60 | 17.2 | 991 | 2021-09-09 19:13:15 | MASTER-SAAO | (19h 12m 49.82s , +35d 19m 01.2s) | C | 60 | 18.0 | 1000 | 2021-09-09 19:13:24 | MASTER-Kislovodsk | (19h 26m 25.15s , +25d 53m 52.7s) | C | 60 | 17.2 | 1000 | 2021-09-09 19:13:24 | MASTER-Kislovodsk | (19h 21m 36.68s , +26d 16m 56.2s) | C | 60 | 17.8 | 1080 | 2021-09-09 19:14:44 | MASTER-Kislovodsk | (19h 02m 37.06s , +31d 36m 55.6s) | C | 60 | 17.3 | 1080 | 2021-09-09 19:14:44 | MASTER-Kislovodsk | (18h 57m 31.55s , +32d 00m 12.4s) | C | 60 | 18.1 | 1160 | 2021-09-09 19:16:04 | MASTER-Kislovodsk | (19h 41m 12.48s , +28d 11m 21.8s) | C | 60 | 17.2 | 1160 | 2021-09-09 19:16:04 | MASTER-Kislovodsk | (19h 46m 07.40s , +27d 48m 03.3s) | C | 60 | 16.5 | 1240 | 2021-09-09 19:17:25 | MASTER-Kislovodsk | (19h 50m 27.22s , +29d 43m 24.6s) | C | 60 | 16.5 | 1240 | 2021-09-09 19:17:25 | MASTER-Kislovodsk | (19h 45m 25.95s , +30d 06m 52.6s) | C | 60 | 17.0 | 1272 | 2021-09-09 19:17:56 | MASTER-SAAO | (19h 22m 38.25s , +35d 16m 31.3s) | C | 60 | 18.2 | 1320 | 2021-09-09 19:18:45 | MASTER-Kislovodsk | (18h 57m 50.17s , +29d 42m 09.6s) | C | 60 | 17.4 | 1400 | 2021-09-09 19:20:05 | MASTER-Kislovodsk | (19h 38m 24.33s , +26d 18m 55.0s) | C | 60 | 17.6 | 1434 | 2021-09-09 19:20:38 | MASTER-SAAO | (19h 14m 48.57s , +25d 46m 56.4s) | C | 60 | 18.1 | 1514 | 2021-09-09 19:21:58 | MASTER-SAAO | (19h 16m 52.33s , +31d 30m 28.7s) | C | 60 | 18.3 | 1593 | 2021-09-09 19:23:18 | MASTER-SAAO | (19h 26m 05.90s , +31d 29m 28.7s) | C | 60 | 18.1 | 1609 | 2021-09-09 19:23:33 | MASTER-Tavrida | (19h 24m 22.04s , +29d 54m 35.7s) | C | 60 | 17.6 | 1673 | 2021-09-09 19:24:37 | MASTER-SAAO | (19h 34m 32.64s , +31d 30m 04.1s) | C | 60 | 17.7 | 1688 | 2021-09-09 19:24:53 | MASTER-Tavrida | (19h 33m 38.87s , +29d 53m 31.5s) | C | 60 | 17.2 | 1768 | 2021-09-09 19:26:12 | MASTER-Tavrida | (19h 20m 30.86s , +27d 58m 21.0s) | C | 60 | 17.5 | 1802 | 2021-09-09 19:26:46 | MASTER-Kislovodsk | (19h 10m 24.47s , +30d 04m 38.9s) | C | 60 | 18.1 | 1802 | 2021-09-09 19:26:46 | MASTER-Kislovodsk | (19h 15m 23.31s , +29d 41m 43.4s) | C | 60 | 17.2 | 1847 | 2021-09-09 19:27:31 | MASTER-Tavrida | (19h 29m 38.67s , +27d 58m 21.3s) | C | 60 | 17.1 | 1915 | 2021-09-09 19:28:40 | MASTER-SAAO | (19h 43m 56.29s , +31d 29m 27.6s) | C | 60 | 17.3 | 1995 | 2021-09-09 19:29:59 | MASTER-SAAO | (19h 12m 55.83s , +35d 17m 55.7s) | C | 60 | 17.9 | 2014 | 2021-09-09 19:30:18 | MASTER-Kislovodsk | (19h 27m 06.51s , +33d 31m 30.1s) | C | 60 | 17.4 | 2014 | 2021-09-09 19:30:18 | MASTER-Kislovodsk | (19h 21m 52.46s , +33d 54m 21.5s) | C | 60 | 18.1 | 2094 | 2021-09-09 19:31:38 | MASTER-Kislovodsk | (19h 11m 40.90s , +27d 48m 22.3s) | C | 60 | 17.3 | 2094 | 2021-09-09 19:31:38 | MASTER-Kislovodsk | (19h 06m 48.85s , +28d 11m 18.1s) | C | 60 | 18.2 | 2174 | 2021-09-09 19:32:59 | MASTER-Kislovodsk | (19h 08m 44.89s , +33d 31m 11.3s) | C | 60 | 17.6 | 2174 | 2021-09-09 19:32:59 | MASTER-Kislovodsk | (19h 03m 33.03s , +33d 54m 18.1s) | C | 60 | 18.3 | 2234 | 2021-09-09 19:33:58 | MASTER-SAAO | (19h 22m 47.20s , +35d 18m 05.8s) | C | 60 | 17.8 | 2254 | 2021-09-09 19:34:19 | MASTER-Kislovodsk | (19h 45m 20.38s , +33d 30m 36.2s) | C | 60 | 16.9 | 2254 | 2021-09-09 19:34:19 | MASTER-Kislovodsk | (19h 40m 05.97s , +33d 53m 42.9s) | C | 60 | 17.8 | 2335 | 2021-09-09 19:35:39 | MASTER-Kislovodsk | (19h 35m 10.91s , +35d 23m 29.5s) | C | 60 | 17.4 | 2335 | 2021-09-09 19:35:39 | MASTER-Kislovodsk | (19h 29m 49.22s , +35d 46m 31.3s) | C | 60 | 18.1 | 2397 | 2021-09-09 19:36:42 | MASTER-SAAO | (19h 13m 55.18s , +25d 47m 53.3s) | C | 60 | 18.2 | 2415 | 2021-09-09 19:36:59 | MASTER-Kislovodsk | (19h 26m 25.16s , +25d 53m 49.2s) | C | 60 | 17.4 | 2415 | 2021-09-09 19:36:59 | MASTER-Kislovodsk | (19h 21m 37.99s , +26d 16m 44.7s) | C | 60 | 18.0 | 2477 | 2021-09-09 19:38:01 | MASTER-SAAO | (19h 15m 49.11s , +31d 31m 25.8s) | C | 60 | 18.4 | 2495 | 2021-09-09 19:38:19 | MASTER-Kislovodsk | (19h 02m 36.77s , +31d 36m 47.2s) | C | 60 | 17.5 | 2495 | 2021-09-09 19:38:19 | MASTER-Kislovodsk | (18h 57m 32.94s , +31d 59m 50.8s) | C | 60 | 18.3 | 2557 | 2021-09-09 19:39:21 | MASTER-SAAO | (19h 25m 10.94s , +31d 29m 09.1s) | C | 60 | 18.1 | 2575 | 2021-09-09 19:39:39 | MASTER-Kislovodsk | (19h 46m 07.23s , +27d 48m 08.3s) | C | 60 | 16.9 | 2575 | 2021-09-09 19:39:39 | MASTER-Kislovodsk | (19h 41m 13.42s , +28d 11m 18.1s) | C | 60 | 17.4 | 2637 | 2021-09-09 19:40:41 | MASTER-SAAO | (19h 33m 40.88s , +31d 30m 27.0s) | C | 60 | 17.7 | 2655 | 2021-09-09 19:40:59 | MASTER-Kislovodsk | (19h 50m 27.99s , +29d 43m 09.5s) | C | 60 | 16.7 | 2655 | 2021-09-09 19:40:59 | MASTER-Kislovodsk | (19h 45m 27.80s , +30d 06m 26.4s) | C | 60 | 17.2 | 2665 | 2021-09-09 19:41:09 | MASTER-Tavrida | (19h 29m 18.01s , +29d 29m 21.8s) | C | 60 | 17.3 | 2735 | 2021-09-09 19:42:19 | MASTER-Kislovodsk | (18h 57m 50.17s , +29d 41m 57.6s) | C | 60 | 17.6 | 2744 | 2021-09-09 19:42:28 | MASTER-Tavrida | (19h 38m 23.98s , +29d 28m 21.4s) | C | 60 | 17.1 | 2815 | 2021-09-09 19:43:39 | MASTER-Kislovodsk | (19h 38m 25.55s , +26d 18m 42.4s) | C | 60 | 17.7 | 2823 | 2021-09-09 19:43:47 | MASTER-Tavrida | (19h 25m 23.96s , +27d 34m 11.6s) | C | 60 | 17.5 | 2876 | 2021-09-09 19:44:40 | MASTER-SAAO | (19h 43m 01.62s , +31d 29m 08.9s) | C | 60 | 17.3 | 2902 | 2021-09-09 19:45:06 | MASTER-Tavrida | (19h 34m 22.12s , +27d 35m 59.6s) | C | 60 | 17.0 | 2956 | 2021-09-09 19:46:00 | MASTER-SAAO | (19h 11m 49.18s , +35d 18m 03.4s) | C | 60 | 17.8 | 2980 | 2021-09-09 19:46:25 | MASTER-Tavrida | (19h 52m 27.72s , +31d 22m 26.2s) | C | 60 | 16.8 | 3195 | 2021-09-09 19:49:59 | MASTER-SAAO | (19h 21m 40.50s , +35d 17m 40.3s) | C | 60 | 18.2 | 3223 | 2021-09-09 19:50:27 | MASTER-Kislovodsk | (19h 11m 44.29s , +27d 47m 11.4s) | C | 60 | 17.3 | 3223 | 2021-09-09 19:50:28 | MASTER-Kislovodsk | (19h 06m 54.24s , +28d 09m 57.7s) | C | 60 | 18.1 | 3303 | 2021-09-09 19:51:48 | MASTER-Kislovodsk | (19h 08m 49.86s , +33d 30m 40.6s) | C | 60 | 17.5 | 3303 | 2021-09-09 19:51:48 | MASTER-Kislovodsk | (19h 03m 40.21s , +33d 53m 40.5s) | C | 60 | 18.3 | 3358 | 2021-09-09 19:52:42 | MASTER-SAAO | (19h 13m 51.74s , +25d 48m 52.2s) | C | 60 | 18.2 | 3383 | 2021-09-09 19:53:08 | MASTER-Kislovodsk | (19h 45m 12.28s , +33d 30m 21.5s) | C | 60 | 16.9 | 3383 | 2021-09-09 19:53:08 | MASTER-Kislovodsk | (19h 39m 59.74s , +33d 53m 20.0s) | C | 60 | 17.8 | 3463 | 2021-09-09 19:54:28 | MASTER-Kislovodsk | (19h 35m 10.90s , +35d 25m 15.3s) | C | 60 | 17.4 | 3463 | 2021-09-09 19:54:28 | MASTER-Kislovodsk | (19h 29m 51.06s , +35d 48m 08.8s) | C | 60 | 18.1 | 3545 | 2021-09-09 19:55:50 | MASTER-Kislovodsk | (19h 26m 25.69s , +25d 54m 16.1s) | C | 60 | 17.4 | 3545 | 2021-09-09 19:55:50 | MASTER-Kislovodsk | (19h 21m 40.29s , +26d 17m 05.6s) | C | 60 | 17.9 | 3625 | 2021-09-09 19:57:10 | MASTER-Kislovodsk | (19h 02m 33.19s , +31d 34m 45.5s) | C | 60 | 17.5 | 3625 | 2021-09-09 19:57:10 | MASTER-Kislovodsk | (18h 57m 31.58s , +31d 57m 41.5s) | C | 60 | 18.2 | 3705 | 2021-09-09 19:58:30 | MASTER-Kislovodsk | (19h 46m 10.69s , +27d 47m 40.7s) | C | 60 | 16.9 | 3705 | 2021-09-09 19:58:30 | MASTER-Kislovodsk | (19h 41m 18.55s , +28d 10m 45.5s) | C | 60 | 17.3 | 3786 | 2021-09-09 19:59:50 | MASTER-Kislovodsk | (19h 50m 23.04s , +29d 43m 07.0s) | C | 60 | 16.7 | 3786 | 2021-09-09 19:59:50 | MASTER-Kislovodsk | (19h 45m 24.50s , +30d 06m 16.2s) | C | 60 | 17.1 | 3866 | 2021-09-09 20:01:10 | MASTER-Kislovodsk | (18h 57m 52.47s , +29d 40m 45.5s) | C | 60 | 17.6 | 3936 | 2021-09-09 20:02:20 | MASTER-Tavrida | (19h 52m 30.40s , +31d 23m 46.4s) | C | 60 | 17.3 | 3946 | 2021-09-09 20:02:30 | MASTER-Kislovodsk | (19h 38m 34.00s , +26d 17m 57.6s) | C | 60 | 17.6 | 4106 | 2021-09-09 20:05:11 | MASTER-Kislovodsk | (19h 20m 23.29s , +31d 36m 55.3s) | C | 60 | 17.4 | 4106 | 2021-09-09 20:05:11 | MASTER-Kislovodsk | (19h 15m 20.40s , +31d 59m 46.5s) | C | 60 | 18.0 | 4187 | 2021-09-09 20:06:31 | MASTER-Kislovodsk | (19h 32m 55.90s , +29d 42m 06.4s) | C | 60 | 17.1 | 4187 | 2021-09-09 20:06:31 | MASTER-Kislovodsk | (19h 27m 58.86s , +30d 05m 00.8s) | C | 60 | 17.7 | 4267 | 2021-09-09 20:07:51 | MASTER-Kislovodsk | (19h 38m 14.57s , +31d 35m 06.7s) | C | 60 | 17.0 | 4267 | 2021-09-09 20:07:51 | MASTER-Kislovodsk | (19h 33m 10.70s , +31d 58m 09.9s) | C | 60 | 17.6 | 4347 | 2021-09-09 20:09:11 | MASTER-Kislovodsk | (19h 28m 57.31s , +27d 47m 12.8s) | C | 60 | 17.0 | 4347 | 2021-09-09 20:09:11 | MASTER-Kislovodsk | (19h 24m 06.95s , +28d 10m 05.9s) | C | 60 | 17.6 | 4522 | 2021-09-09 20:12:06 | MASTER-Tavrida | (19h 32m 51.32s , +33d 17m 17.8s) | C | 60 | 18.1 | 4667 | 2021-09-09 20:14:32 | MASTER-Kislovodsk | (19h 16m 31.59s , +35d 23m 42.4s) | C | 60 | 17.5 | 4668 | 2021-09-09 20:14:32 | MASTER-Kislovodsk | (19h 11m 14.67s , +35d 46m 31.0s) | C | 60 | 18.1 | 5068 | 2021-09-09 20:21:12 | MASTER-Kislovodsk | (19h 20m 26.16s , +31d 36m 24.3s) | C | 60 | 17.3 | 5068 | 2021-09-09 20:21:12 | MASTER-Kislovodsk | (19h 15m 24.88s , +31d 59m 12.9s) | C | 60 | 17.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.

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[vsnet-grb-info 28685] Fermi GRB 210909A: Global MASTER-Net observations report
by GCN Circulars 09 Sep '21

09 Sep '21

TITLE: GCN CIRCULAR NUMBER: 30788 SUBJECT: Fermi GRB 210909A: Global MASTER-Net observations report DATE: 21/09/09 17:30:49 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 210909A ( Fermi GBM team, GCN 30786) errorbox 20793 sec after notice time and 20835 sec after trigger time at 2021-09-09 16:30:34 UT, with upper limit up to 18.9 mag. Observations started at twilight. The observations began at zenith distance = 51 deg. The sun altitude is -11.3 deg. MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 210909A errorbox 22297 sec after notice time and 22338 sec after trigger time at 2021-09-09 16:55:38 UT, with upper limit up to 18.3 mag. Observations started at twilight. The observations began at zenith distance = 53 deg. The sun altitude is -9.8 deg. The galactic latitude b = 31 deg., longitude l = 129 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1714989 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 20865 | 2021-09-09 16:30:34 | MASTER-Kislovodsk | (10h 14m 28.70s , +82d 47m 53.6s) | C | 60 | 16.3 | 20865 | 2021-09-09 16:30:34 | MASTER-Kislovodsk | (09h 41m 16.73s , +83d 05m 01.4s) | C | 60 | 17.1 | 20945 | 2021-09-09 16:31:54 | MASTER-Kislovodsk | (08h 23m 41.35s , +84d 39m 01.6s) | C | 60 | 16.6 | 20946 | 2021-09-09 16:31:54 | MASTER-Kislovodsk | (07h 38m 58.88s , +84d 54m 26.6s) | C | 60 | 17.3 | 21026 | 2021-09-09 16:33:15 | MASTER-Kislovodsk | (08h 12m 17.57s , +82d 43m 50.6s) | C | 60 | 16.5 | 21026 | 2021-09-09 16:33:15 | MASTER-Kislovodsk | (07h 40m 00.71s , +83d 01m 22.3s) | C | 60 | 17.2 | 21106 | 2021-09-09 16:34:35 | MASTER-Kislovodsk | (09h 42m 52.34s , +80d 51m 36.6s) | C | 60 | 16.7 | 21106 | 2021-09-09 16:34:35 | MASTER-Kislovodsk | (09h 17m 11.18s , +81d 09m 45.3s) | C | 60 | 17.5 | 21186 | 2021-09-09 16:35:55 | MASTER-Kislovodsk | (08h 06m 09.13s , +80d 51m 24.3s) | C | 60 | 16.9 | 21186 | 2021-09-09 16:35:55 | MASTER-Kislovodsk | (07h 40m 44.78s , +81d 09m 58.0s) | C | 60 | 17.6 | 21266 | 2021-09-09 16:37:15 | MASTER-Kislovodsk | (11h 10m 25.24s , +84d 40m 57.4s) | C | 60 | 17.0 | 21266 | 2021-09-09 16:37:15 | MASTER-Kislovodsk | (10h 24m 16.27s , +84d 54m 54.2s) | C | 60 | 17.8 | 21347 | 2021-09-09 16:38:36 | MASTER-Kislovodsk | (08h 48m 42.49s , +86d 34m 16.5s) | C | 60 | 17.1 | 21347 | 2021-09-09 16:38:36 | MASTER-Kislovodsk | (07h 36m 57.06s , +86d 43m 45.6s) | C | 60 | 18.0 | 21427 | 2021-09-09 16:39:56 | MASTER-Kislovodsk | (09h 22m 34.63s , +78d 57m 41.8s) | C | 60 | 17.1 | 21427 | 2021-09-09 16:39:56 | MASTER-Kislovodsk | (09h 01m 28.93s , +79d 16m 31.4s) | C | 60 | 17.9 | 21507 | 2021-09-09 16:41:16 | MASTER-Kislovodsk | (11h 19m 46.37s , +80d 54m 45.8s) | C | 60 | 17.0 | 21507 | 2021-09-09 16:41:16 | MASTER-Kislovodsk | (10h 53m 28.11s , +81d 12m 50.5s) | C | 60 | 17.9 | 21587 | 2021-09-09 16:42:36 | MASTER-Kislovodsk | (10h 21m 26.17s , +79d 17m 57.3s) | C | 60 | 18.1 | 21667 | 2021-09-09 16:43:56 | MASTER-Kislovodsk | (11h 43m 38.91s , +83d 04m 51.6s) | C | 60 | 18.1 | 21827 | 2021-09-09 16:46:36 | MASTER-Kislovodsk | (10h 14m 37.26s , +82d 47m 18.5s) | C | 60 | 17.1 | 21827 | 2021-09-09 16:46:36 | MASTER-Kislovodsk | (09h 41m 27.54s , +83d 03m 49.6s) | C | 60 | 18.3 | 21908 | 2021-09-09 16:47:56 | MASTER-Kislovodsk | (08h 23m 51.07s , +84d 38m 06.6s) | C | 60 | 17.3 | 21908 | 2021-09-09 16:47:56 | MASTER-Kislovodsk | (07h 39m 11.29s , +84d 53m 15.1s) | C | 60 | 18.3 | 21988 | 2021-09-09 16:49:17 | MASTER-Kislovodsk | (08h 12m 33.75s , +82d 45m 28.3s) | C | 60 | 17.1 | 21988 | 2021-09-09 16:49:17 | MASTER-Kislovodsk | (07h 40m 03.60s , +83d 02m 47.9s) | C | 60 | 18.1 | 22068 | 2021-09-09 16:50:37 | MASTER-Kislovodsk | (09h 42m 51.64s , +80d 51m 47.2s) | C | 60 | 17.3 | 22068 | 2021-09-09 16:50:37 | MASTER-Kislovodsk | (09h 17m 06.72s , +81d 09m 47.4s) | C | 60 | 18.5 | 22148 | 2021-09-09 16:51:57 | MASTER-Kislovodsk | (07h 40m 48.78s , +81d 10m 07.3s) | C | 60 | 18.2 | 22148 | 2021-09-09 16:51:57 | MASTER-Kislovodsk | (08h 06m 15.07s , +80d 51m 34.7s) | C | 60 | 17.3 | 22228 | 2021-09-09 16:53:17 | MASTER-Kislovodsk | (11h 10m 34.85s , +84d 41m 30.5s) | C | 60 | 17.2 | 22228 | 2021-09-09 16:53:17 | MASTER-Kislovodsk | (10h 24m 21.62s , +84d 55m 25.0s) | C | 60 | 18.4 | 22309 | 2021-09-09 16:54:38 | MASTER-Kislovodsk | (08h 49m 05.00s , +86d 32m 02.9s) | C | 60 | 17.3 | 22309 | 2021-09-09 16:54:38 | MASTER-Kislovodsk | (07h 38m 03.19s , +86d 42m 03.9s) | C | 60 | 18.5 | 22369 | 2021-09-09 16:55:38 | MASTER-Tavrida | (06h 55m 26.00s , +82d 42m 36.7s) | C | 60 | 16.4 | 22389 | 2021-09-09 16:55:58 | MASTER-Kislovodsk | (09h 22m 47.49s , +78d 56m 52.4s) | C | 60 | 17.4 | 22389 | 2021-09-09 16:55:58 | MASTER-Kislovodsk | (09h 01m 42.46s , +79d 15m 41.5s) | C | 60 | 18.3 | 22469 | 2021-09-09 16:57:18 | MASTER-Kislovodsk | (11h 19m 54.63s , +80d 53m 59.4s) | C | 60 | 17.2 | 22469 | 2021-09-09 16:57:18 | MASTER-Kislovodsk | (10h 53m 37.55s , +81d 11m 58.5s) | C | 60 | 18.4 | 22550 | 2021-09-09 16:58:38 | MASTER-Kislovodsk | (10h 21m 29.34s , +79d 16m 51.5s) | C | 60 | 18.6 | 22630 | 2021-09-09 16:59:58 | MASTER-Kislovodsk | (11h 43m 39.94s , +83d 05m 55.2s) | C | 60 | 18.4 | 22790 | 2021-09-09 17:02:39 | MASTER-Kislovodsk | (09h 41m 32.34s , +83d 03m 39.8s) | C | 60 | 18.5 | 22790 | 2021-09-09 17:02:39 | MASTER-Kislovodsk | (10h 14m 43.09s , +82d 47m 07.3s) | C | 60 | 17.3 | 22870 | 2021-09-09 17:03:59 | MASTER-Kislovodsk | (07h 39m 26.26s , +84d 53m 54.7s) | C | 60 | 18.4 | 22870 | 2021-09-09 17:03:59 | MASTER-Kislovodsk | (08h 24m 14.18s , +84d 38m 32.4s) | C | 60 | 17.4 | 22951 | 2021-09-09 17:05:19 | MASTER-Kislovodsk | (07h 40m 17.83s , +83d 00m 58.2s) | C | 60 | 18.2 | 22951 | 2021-09-09 17:05:19 | MASTER-Kislovodsk | (08h 12m 42.35s , +82d 43m 28.0s) | C | 60 | 17.2 | 23031 | 2021-09-09 17:06:40 | MASTER-Kislovodsk | (07h 41m 27.45s , +83d 01m 00.4s) | C | 60 | 15.4 | 23031 | 2021-09-09 17:06:40 | MASTER-Kislovodsk | (08h 13m 26.89s , +82d 43m 28.5s) | C | 60 | 14.3 | 23111 | 2021-09-09 17:08:00 | MASTER-Kislovodsk | (07h 42m 25.79s , +83d 01m 02.0s) | C | 60 | 15.2 | 23111 | 2021-09-09 17:08:00 | MASTER-Kislovodsk | (08h 14m 51.39s , +82d 43m 31.1s) | C | 60 | 14.5 | 23191 | 2021-09-09 17:09:20 | MASTER-Kislovodsk | (11h 10m 37.44s , +84d 40m 37.1s) | C | 60 | 17.4 | 23191 | 2021-09-09 17:09:20 | MASTER-Kislovodsk | (10h 24m 33.41s , +84d 54m 34.9s) | C | 60 | 18.5 | 23272 | 2021-09-09 17:10:40 | MASTER-Kislovodsk | (08h 49m 39.01s , +86d 33m 30.5s) | C | 60 | 17.4 | 23272 | 2021-09-09 17:10:40 | MASTER-Kislovodsk | (07h 38m 03.59s , +86d 43m 53.2s) | C | 60 | 18.6 | 23352 | 2021-09-09 17:12:00 | MASTER-Kislovodsk | (09h 22m 46.92s , +78d 57m 13.9s) | C | 60 | 17.5 | 23352 | 2021-09-09 17:12:00 | MASTER-Kislovodsk | (09h 01m 41.45s , +79d 16m 06.2s) | C | 60 | 18.6 | 23431 | 2021-09-09 17:13:20 | MASTER-Kislovodsk | (11h 19m 55.59s , +80d 54m 05.9s) | C | 60 | 17.5 | 23431 | 2021-09-09 17:13:20 | MASTER-Kislovodsk | (10h 53m 39.60s , +81d 12m 03.4s) | C | 60 | 18.6 | 23512 | 2021-09-09 17:14:40 | MASTER-Kislovodsk | (10h 21m 38.29s , +79d 17m 13.7s) | C | 60 | 18.9 | 23592 | 2021-09-09 17:16:00 | MASTER-Kislovodsk | (11h 43m 46.21s , +83d 03m 59.1s) | C | 60 | 18.6 | 24005 | 2021-09-09 17:22:54 | MASTER-Tavrida | (06h 40m 04.63s , +84d 43m 17.7s) | C | 60 | 18.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.

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[vsnet-grb-info 28684] GECAM observation of a burst from SGR J1555.2-5402
by GCN Circulars 09 Sep '21

09 Sep '21

TITLE: GCN CIRCULAR NUMBER: 30787 SUBJECT: GECAM observation of a burst from SGR J1555.2-5402 DATE: 21/09/09 14:49:12 GMT FROM: Zhao Yi at POLAR <yizhao(a)ihep.ac.cn> Yi Zhao, S. Xiao, S. L. Xiong, L. Lin, C. Cai, J. J. He, Y. Huang, Z. W. Guo, C. Y. Li, X. B. Li, J. C. Liu, X. Y. Song, C. W. Wang, P. Wang, S. L. Xie, W. C. Xue, Q. B. Yi, Y. Q. Zhang, G. Y. Zhao, X. Y. Zhao, C. Zheng, Y. Q. Du, D. Y. Guo, J. Liang, F. J. Lu, Q. Luo, X. Ma, W. X. Peng, R. Qiao, L. M. Song, J. Wang, H. Wu, P. Zhang, S. N. Zhang, X. L. Zhang, Z. Zhang, S. J. Zheng (IHEP), report on behalf of GECAM team: During the commissioning phase, GECAM-B was triggered on-ground by a bright short burst from SGR J1555.2-5402 at 2021-09-07T19:15:21.100 UTC (T0), which was also detected by Fermi/GBM. According to the GECAM-B light curves in about 15-60 keV, this burst mainly consists of a single pulse with T90 of 18 ms measured from T0-0.014 s. The GECAM light curve could be found here: http://twiki.ihep.ac.cn/pub/GECAM/GRBList/SGR20210907T191521.100-Lc.png Since this burst has very few counts registered on GECAM-B detectors, the location given by GECAM-B alone is quite coarse but broadly consistent with SGR J1555.2-5402. According to our multiple-mission joint location pipeline (S. Xiao et al., accepted by ApJ) using GECAM-B and Fermi/GBM data, this burst is localized to an annulus which is very consistent with SGR J1555.2-5402. The GECAM-GBM joint location could be found here: http://twiki.ihep.ac.cn/pub/GECAM/GRBList/SGR20210907T191521.100-JointLoc.p… Considering these results stated above and some activities reported recently, we conclude that this burst is from SGR J1555.2-5402. Please note that all GECAM results here are preliminary. The final analysis will be published in journal papers or GECAM online catalog. Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time), which was funded by the Chinese Academy of Sciences (CAS).

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[vsnet-grb-info 28683] GRB 210909A: Fermi GBM Final Real-time Localization
by GCN Circulars 09 Sep '21

09 Sep '21

TITLE: GCN CIRCULAR NUMBER: 30786 SUBJECT: GRB 210909A: Fermi GBM Final Real-time Localization DATE: 21/09/09 10:53:27 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply(a)GIOC.nsstc.nasa.gov> The Fermi GBM team reports the detection of a likely SHORT GRB At 10:43:19 UT on 9 Sep 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210909A (trigger 652877004.365114 / 210909447). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 140.6, Dec = 83.3 (J2000 degrees, equivalent to J2000 09h 22m, 83d 17'), with a statistical uncertainty of 2.7 degrees. The angle from the Fermi LAT boresight is 88.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210909447/… The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210909447/… The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210909447/…

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[vsnet-grb-info 28682] GRB 210905A: Swift/UVOT Upper Limits
by GCN Circulars 08 Sep '21

08 Sep '21

TITLE: GCN CIRCULAR NUMBER: 30785 SUBJECT: GRB 210905A: Swift/UVOT Upper Limits DATE: 21/09/09 04:59:53 GMT FROM: Mike Siegel at PSU/Swift MOC <mhs18(a)psu.edu> M. H. Siegel (PSU) and E. Sonbas (Adiyaman Univ.) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 210905A 157 s after the BAT trigger (Sonbas et al., GCN Circ. 30765). No optical afterglow consistent with the XRT position (Beardmore et al. GCN Circ. 30768) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are: Filter T_start(s) T_stop(s) Exp(s) Mag u_FC 157 407 246 >20.1 v 4193 4393 197 >19.3 b 3782 3982 197 >21.4 w1 4603 4803 197 >20.1 m2 4398 4597 197 >19.5 w2 3988 4188 197 >19.4 The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.034 in the direction of the burst (Schlegel et al. 1998).

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[vsnet-grb-info 28681] GRB 210905A: ATCA detection
by GCN Circulars 08 Sep '21

08 Sep '21

TITLE: GCN CIRCULAR NUMBER: 30784 SUBJECT: GRB 210905A: ATCA detection DATE: 21/09/08 23:15:54 GMT FROM: Tanmoy Laskar at U of Bath <tanmoylaskar(a)gmail.com> T. Laskar (University of Bath), S. Bhandari (CSIRO), R. Margutti (UC Berkeley), K. D. Alexander (Northwestern), E. Berger (Harvard), R. Chornock (UC Berkeley), D. Coppejans (Northwestern), M. Drout (U. Toronto), H. van Eerten (University of Bath), W. Fong (Northwestern), C. Guidorzi (U. Ferrara), C. G. Mundell (University of Bath), P. Schady (University of Bath), and G. Schroeder (Northwestern) report: "We observed GRB 210905A (Sonbas et al., GCN 30765) with the Australia Telescope Compact Array (ATCA) at multiple frequencies beginning on 2021 Sep 08 14:20 UT. We detect a radio counterpart at 5.5 and 9.0 GHz at a position consistent with the X-ray position (Beardmore et al., GCN 30768), optical position (Strausbaugh & Cucchiara, GCN 30769), and mm-band position (Laskar et al., GCN 30783) with a flux density of ~ 0.1 mJy at 9.0 GHz at a mid-time of 3.65 days after the burst. We thank the CSIRO staff for approving and scheduling these observations. The Australia Telescope Compact Array is part of the Australia Telescope National Facility which is funded by the Australian Government for operation as a National Facility managed by CSIRO. We acknowledge the Gomeroi people as the traditional owners of the Observatory site."

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