March 2024 - vsnet-grb-info - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-grb-info 33850] GRB 240329A: GRBAlpha detection
by GCN Circulars 31 Mar '24

31 Mar '24

TITLE: GCN CIRCULAR NUMBER: 35997 SUBJECT: GRB 240329A: GRBAlpha detection DATE: 24/03/31 14:45:47 GMT FROM: Marianna Dafčíková at Masaryk University <500025(a)mail.muni.cz> M. Dafcikova, J. Ripa, M. Kolar (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), N. Husarikova, F. Munz , M. Topinka, M. Duriskova, L. Szakszonova, J.-P. Breuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical U. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H. Poon, H. Matake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the GRBAlpha collaboration. The long-duration GRB 240329A (Fermi/GBM detection: GCN 35993) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023, A&A, 677, 40; https://ui.adsabs.harvard.edu/abs/2023A%26A...677A..40P/abstract). The detection was confirmed at the peak time 2024-03-29 21:43:08.0 UTC. The T90 duration measured by GRBAlpha is 6.5 s and the overall significance during T90 reaches 16 sigma. The light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB240329A_GCN.pdf All GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/ GRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume. View this GCN Circular online at https://gcn.nasa.gov/circulars/35997. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 33849] Fermi trigger No 733366352: Global MASTER-Net observations report
by GCN Circulars 30 Mar '24

30 Mar '24

TITLE: GCN CIRCULAR NUMBER: 35996 SUBJECT: Fermi trigger No 733366352: Global MASTER-Net observations report DATE: 24/03/30 07:15:34 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (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. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (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 GRB240329.04 (trigger No 733366352,00h 01m 24.00s , -16d 09m 00.0s, R=26.22) errorbox 59181 sec after notice time and 59213 sec after trigger time at 2024-03-29 17:19:21 UT, with upper limit up to 24.5 mag. Observations started at twilight. The observations began at zenith distance = 80 deg. The sun altitude is -9.6 deg. The galactic latitude b = -74 deg., longitude l = 76 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2409680 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 59244 | 2024-03-29 17:19:21 | MASTER-SAAO | (00h 33m 49.21s , -32d 55m 01.9s) | C | 60 | 13.1 | 59711 | 2024-03-29 17:27:08 | MASTER-SAAO | (00h 50m 53.96s , -31d 01m 27.3s) | C | 60 | 14.6 | 59871 | 2024-03-29 17:29:48 | MASTER-SAAO | (01h 07m 20.48s , -29d 07m 29.1s) | C | 60 | 24.5 | 59871 | 2024-03-29 17:29:48 | MASTER-SAAO | (01h 09m 21.51s , -29d 20m 19.4s) | C | 60 | 15.0 | 59955 | 2024-03-29 17:31:12 | MASTER-SAAO | (01h 23m 05.41s , -27d 13m 20.0s) | C | 60 | 15.7 | 59955 | 2024-03-29 17:31:12 | MASTER-SAAO | (01h 25m 04.39s , -27d 26m 08.5s) | C | 60 | 16.5 | 60035 | 2024-03-29 17:32:32 | MASTER-SAAO | (01h 08m 14.31s , -27d 26m 51.3s) | C | 60 | 15.9 | 60126 | 2024-03-29 17:34:03 | MASTER-SAAO | (01h 08m 31.62s , -31d 03m 10.2s) | C | 60 | 14.0 | 60126 | 2024-03-29 17:34:03 | MASTER-SAAO | (01h 10m 35.07s , -31d 16m 01.1s) | C | 60 | 15.0 | 60205 | 2024-03-29 17:35:22 | MASTER-SAAO | (01h 37m 11.88s , -23d 27m 10.0s) | C | 60 | 15.8 | 60205 | 2024-03-29 17:35:22 | MASTER-SAAO | (01h 39m 07.37s , -23d 39m 59.3s) | C | 60 | 16.7 | 60285 | 2024-03-29 17:36:42 | MASTER-SAAO | (01h 24m 38.26s , -29d 07m 16.6s) | C | 60 | 17.6 | 60285 | 2024-03-29 17:36:42 | MASTER-SAAO | (01h 26m 39.42s , -29d 20m 05.4s) | C | 60 | 18.4 | 60364 | 2024-03-29 17:38:02 | MASTER-SAAO | (00h 51m 59.18s , -32d 56m 39.6s) | C | 60 | 15.5 | 60364 | 2024-03-29 17:38:02 | MASTER-SAAO | (00h 54m 05.22s , -33d 09m 34.8s) | C | 60 | 16.9 | 60444 | 2024-03-29 17:39:21 | MASTER-SAAO | (01h 40m 15.11s , -27d 13m 29.5s) | C | 60 | 17.2 | 60444 | 2024-03-29 17:39:21 | MASTER-SAAO | (01h 42m 14.34s , -27d 26m 17.5s) | C | 60 | 17.8 | 60524 | 2024-03-29 17:40:41 | MASTER-SAAO | (01h 38m 34.03s , -25d 20m 10.5s) | C | 60 | 16.2 | 60524 | 2024-03-29 17:40:41 | MASTER-SAAO | (01h 40m 31.36s , -25d 33m 00.1s) | C | 60 | 17.3 | 60836 | 2024-03-29 17:45:53 | MASTER-SAAO | (01h 52m 11.87s , -21d 31m 14.8s) | C | 60 | 15.0 | 60836 | 2024-03-29 17:45:53 | MASTER-SAAO | (01h 54m 06.51s , -21d 44m 03.2s) | C | 60 | 17.5 | 60916 | 2024-03-29 17:47:13 | MASTER-SAAO | (01h 25m 20.77s , -27d 26m 11.0s) | C | 60 | 17.2 | 61075 | 2024-03-29 17:49:52 | MASTER-SAAO | (01h 08m 45.99s , -31d 01m 46.4s) | C | 60 | 14.0 | 61075 | 2024-03-29 17:49:52 | MASTER-SAAO | (01h 10m 49.99s , -31d 14m 41.7s) | C | 60 | 18.1 | 61154 | 2024-03-29 17:51:12 | MASTER-SAAO | (01h 39m 13.90s , -23d 39m 40.5s) | C | 60 | 16.9 | 61234 | 2024-03-29 17:52:31 | MASTER-SAAO | (01h 24m 50.01s , -29d 08m 44.9s) | C | 60 | 14.7 | 61234 | 2024-03-29 17:52:31 | MASTER-SAAO | (01h 26m 51.79s , -29d 21m 39.0s) | C | 60 | 18.5 | 61393 | 2024-03-29 17:55:11 | MASTER-SAAO | (01h 40m 23.32s , -27d 13m 15.3s) | C | 60 | 16.3 | 61393 | 2024-03-29 17:55:11 | MASTER-SAAO | (01h 42m 22.94s , -27d 26m 08.1s) | C | 60 | 18.1 | 61473 | 2024-03-29 17:56:30 | MASTER-SAAO | (01h 40m 42.28s , -25d 32m 37.4s) | C | 60 | 17.5 | 61633 | 2024-03-29 17:59:10 | MASTER-SAAO | (01h 55m 49.18s , -23d 38m 38.3s) | C | 60 | 17.6 | 61712 | 2024-03-29 18:00:30 | MASTER-SAAO | (01h 52m 56.81s , -19d 51m 23.9s) | C | 60 | 16.7 | 62034 | 2024-03-29 18:05:51 | MASTER-SAAO | (01h 54m 19.42s , -21d 44m 25.8s) | C | 60 | 15.7 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/35996. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 33848] Fermi GRB 240329A: Global MASTER-Net observations report
by GCN Circulars 29 Mar '24

29 Mar '24

TITLE: GCN CIRCULAR NUMBER: 35995 SUBJECT: Fermi GRB 240329A: Global MASTER-Net observations report DATE: 24/03/29 22:15:55 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (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. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (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 GRB 240329A ( Fermi GBM team, GCN 35993) errorbox 567 sec after notice time and 601 sec after trigger time at 2024-03-29 21:53:08 UT, with upper limit up to 16.5 mag. The observations began at zenith distance = 81 deg. The sun altitude is -59.4 deg. The galactic latitude b = 18 deg., longitude l = 18 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2410319 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 631 | 2024-03-29 21:53:08 | MASTER-SAAO | (17h 15m 08.53s , -04d 46m 28.6s) | C | 60 | 16.5 | 711 | 2024-03-29 21:54:28 | MASTER-SAAO | (17h 15m 09.18s , -04d 46m 22.7s) | C | 60 | 16.3 | 790 | 2024-03-29 21:55:47 | MASTER-SAAO | (17h 15m 09.74s , -04d 46m 17.5s) | C | 60 | 16.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/35995. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 33847] GRB 240329A: BALROG localization (Fermi Trigger 733441392 / GRB 240329905)
by GCN Circulars 29 Mar '24

29 Mar '24

TITLE: GCN CIRCULAR NUMBER: 35994 SUBJECT: GRB 240329A: BALROG localization (Fermi Trigger 733441392 / GRB 240329905) DATE: 24/03/29 22:04:21 GMT FROM: Jochen Greiner at MPE <jcgrog(a)mpe.mpg.de> T. Preis, B. Biltzinger, J. Burgess & J. Greiner (all MPE Garching) report: The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 733441392 at 21:43:07 on 29 March 2024 were automatically fitted for spectrum and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427; Berlato et al. 2019, ApJ 873, 60). The best-fit position is: RA(2000.0) = 248.9 deg Decl.(2000.0) = -1.4 deg The 1 sigma statistical error radius is 3.4 deg. We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB240329905/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB240329905/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB240329905/json View this GCN Circular online at https://gcn.nasa.gov/circulars/35994. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 33846] GRB 240329A: Fermi GBM Final Real-time Localization
by GCN Circulars 29 Mar '24

29 Mar '24

TITLE: GCN CIRCULAR NUMBER: 35993 SUBJECT: GRB 240329A: Fermi GBM Final Real-time Localization DATE: 24/03/29 21:53:41 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 LONG GRB At 21:43:07 UT on 29 Mar 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240329A (trigger 733441392.528372 / 240329905). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 259.7, Dec = -4.8 (J2000 degrees, equivalent to J2000 17h 18m, -4d 47'), with a statistical uncertainty of 3.8 degrees. The angle from the Fermi LAT boresight is 97.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240329905/… The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240329905/… The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240329905/… View this GCN Circular online at https://gcn.nasa.gov/circulars/35993. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 33845] Fermi GRB 240328B: Global MASTER-Net observations report
by GCN Circulars 29 Mar '24

29 Mar '24

TITLE: GCN CIRCULAR NUMBER: 35992 SUBJECT: Fermi GRB 240328B: Global MASTER-Net observations report DATE: 24/03/29 17:31:00 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (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. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB 240328B ( Fermi GBM team, GCN 35987) errorbox 77794 sec after notice time and 77830 sec after trigger time at 2024-03-29 16:46:21 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 77 deg. The sun altitude is -35.1 deg. The galactic latitude b = 34 deg., longitude l = 339 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2409475 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 77860 | 2024-03-29 16:46:21 | MASTER-Tunka | (14h 36m 48.87s , -18d 22m 09.4s) | C | 60 | 15.5 | 77861 | 2024-03-29 16:46:21 | MASTER-Tunka | (14h 38m 08.41s , -17d 38m 54.4s) | C | 60 | 17.1 | 77948 | 2024-03-29 16:47:48 | MASTER-Tunka | (14h 43m 59.49s , -16d 29m 36.2s) | C | 60 | 16.7 | 77949 | 2024-03-29 16:47:49 | MASTER-Tunka | (14h 45m 17.79s , -15d 46m 24.1s) | C | 60 | 17.5 | 78035 | 2024-03-29 16:49:15 | MASTER-Tunka | (14h 59m 41.92s , -16d 31m 40.9s) | C | 60 | 15.7 | 78036 | 2024-03-29 16:49:16 | MASTER-Tunka | (15h 01m 00.09s , -15d 48m 28.9s) | C | 60 | 16.2 | 78123 | 2024-03-29 16:50:43 | MASTER-Tunka | (14h 51m 54.70s , -14d 36m 43.5s) | C | 60 | 14.7 | 78157 | 2024-03-29 16:51:17 | MASTER-Tunka | (14h 53m 11.85s , -13d 53m 33.8s) | C | 60 | 15.4 | Coadd 78237 | 2024-03-29 16:52:37 | MASTER-Tunka | (15h 10m 06.13s , -17d 41m 11.5s) | C | 60 | 14.3 | Coadd 78286 | 2024-03-29 16:53:27 | MASTER-Tunka | (14h 25m 09.56s , -22d 10m 42.9s) | C | 60 | 15.8 | 78321 | 2024-03-29 16:54:01 | MASTER-Tunka | (14h 26m 31.98s , -21d 27m 18.2s) | C | 60 | 16.0 | Coadd 78369 | 2024-03-29 16:54:50 | MASTER-Tunka | (15h 07m 35.00s , -14d 36m 19.1s) | C | 60 | 15.5 | 78404 | 2024-03-29 16:55:24 | MASTER-Tunka | (15h 08m 52.07s , -13d 53m 10.3s) | C | 60 | 15.8 | Coadd 78450 | 2024-03-29 16:56:10 | MASTER-Tunka | (14h 28m 06.63s , -16d 28m 01.7s) | C | 60 | 16.8 | 78484 | 2024-03-29 16:56:45 | MASTER-Tunka | (14h 29m 25.11s , -15d 44m 48.3s) | C | 60 | 16.8 | Coadd 80063 | 2024-03-29 17:23:03 | MASTER-Tunka | (14h 36m 52.24s , -18d 20m 38.6s) | C | 60 | 15.7 | 80150 | 2024-03-29 17:24:30 | MASTER-Tunka | (14h 43m 57.08s , -16d 28m 17.8s) | C | 60 | 13.5 | 80198 | 2024-03-29 17:25:18 | MASTER-Tunka | (14h 45m 14.95s , -15d 45m 08.6s) | C | 60 | 14.5 | Coadd Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/35992. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 33844] Fermi GRB 240328A: Global MASTER-Net observations report
by GCN Circulars 29 Mar '24

29 Mar '24

TITLE: GCN CIRCULAR NUMBER: 35991 SUBJECT: Fermi GRB 240328A: Global MASTER-Net observations report DATE: 24/03/29 17:30:52 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (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. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB 240328A ( Fermi GBM team, GCN 35986) errorbox 1 days 15952 sec after notice time and 1 days 15986 sec after trigger time at 2024-03-29 16:47:48 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 75 deg. The sun altitude is -35.1 deg. The galactic latitude b = 41 deg., longitude l = 0 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2409243 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 102416 | 2024-03-29 16:47:48 | MASTER-Tunka | (14h 43m 59.49s , -16d 29m 36.2s) | C | 60 | 16.7 | 102417 | 2024-03-29 16:47:49 | MASTER-Tunka | (14h 45m 17.79s , -15d 46m 24.1s) | C | 60 | 17.5 | 102503 | 2024-03-29 16:49:15 | MASTER-Tunka | (14h 59m 41.92s , -16d 31m 40.9s) | C | 60 | 15.7 | 102504 | 2024-03-29 16:49:16 | MASTER-Tunka | (15h 01m 00.09s , -15d 48m 28.9s) | C | 60 | 16.2 | 102591 | 2024-03-29 16:50:43 | MASTER-Tunka | (14h 51m 54.70s , -14d 36m 43.5s) | C | 60 | 14.7 | 102625 | 2024-03-29 16:51:17 | MASTER-Tunka | (14h 53m 11.85s , -13d 53m 33.8s) | C | 60 | 15.4 | Coadd 102705 | 2024-03-29 16:52:37 | MASTER-Tunka | (15h 10m 06.13s , -17d 41m 11.5s) | C | 60 | 14.3 | Coadd 102838 | 2024-03-29 16:54:50 | MASTER-Tunka | (15h 07m 35.00s , -14d 36m 19.1s) | C | 60 | 15.5 | 102872 | 2024-03-29 16:55:24 | MASTER-Tunka | (15h 08m 52.07s , -13d 53m 10.3s) | C | 60 | 15.8 | Coadd 104618 | 2024-03-29 17:24:30 | MASTER-Tunka | (14h 43m 57.08s , -16d 28m 17.8s) | C | 60 | 13.5 | 104666 | 2024-03-29 17:25:18 | MASTER-Tunka | (14h 45m 14.95s , -15d 45m 08.6s) | C | 60 | 14.5 | Coadd Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/35991. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 33843] X-ray transient EP240315a: continued ATCA monitoring
by GCN Circulars 29 Mar '24

29 Mar '24

TITLE: GCN CIRCULAR NUMBER: 35990 SUBJECT: X-ray transient EP240315a: continued ATCA monitoring DATE: 24/03/29 11:07:44 GMT FROM: Roberto Ricci at INAF-IRA <ricci(a)ira.inaf.it> R. Ricci (INAF-IRA), D. Dobie (Swinburne/OzGrav), J. K. Leung (U. Toronto/HUJI), E. Troja (U. Rome) We report on the results of a follow-up observation of the field of AT2024eju (Srivastav et al., GCN35932), the likely optical counterpart to the fast X-ray transient EP240315a (Zhang et al., GCN35931), with the Australia Telescope Compact Array (ATCA) under project code CX564. The observations were taken from 2024-03-26 06:20 UT to 2024-03-26 11:24 UT, in a single run, at 5.5 and 9 GHz. The primary calibrator was 1934-638 and the phase calibrator 0941-080. From a preliminary analysis, the radio source reported in our previous GCN (Leung et al., GCN 35968) continues to be detected at a comparable flux level, ~0.1 mJy. Monitoring with ATCA will continue to assess the variability of the source. We thank the CSIRO Space and Astronomy staff, in particular Jamie Stevens, for supporting these observations in a timely manner. We acknowledge the Gomeroi people as the traditional owners of the Observatory site. The Australia Telescope Compact Array is part of the Australia Telescope National Facility (https://ror.org/05qajvd42) which is funded by the Australian Government for operation as a National Facility managed by CSIRO. View this GCN Circular online at https://gcn.nasa.gov/circulars/35990. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 33842] IceCube-240327B: No candidates from the Zwicky Transient Facility
by GCN Circulars 29 Mar '24

29 Mar '24

TITLE: GCN CIRCULAR NUMBER: 35989 SUBJECT: IceCube-240327B: No candidates from the Zwicky Transient Facility DATE: 24/03/29 03:10:13 GMT FROM: Robert Stein at Caltech <rdstein(a)astro.caltech.edu> Robert Stein (Caltech), Sven Weimann (Ruhr University Bochum), Jannis Necker (DESY), Simeon Reusch (DESY), Anna Franckowiak (DESY/Ruhr University Bochum) report: On behalf of the Zwicky Transient Facility (ZTF) and Global Relay of Observatories Watching Transients Happen (GROWTH) collaborations: As part of the ZTF neutrino follow up program (Stein et al. 2023), we observed the localization region of the neutrino event IceCube-240327B (Sommani et. al, GCN 35984) with the Palomar 48-inch telescope, equipped with the 47 square degree ZTF camera (Bellm et al. 2019, Graham et al. 2019). We started observations in the g- and r-band beginning at 2024-03-28 03:32 UTC, approximately 11.3 hours after event time. We covered 88.6% (5.7 sq deg) of the reported localization region. This estimate accounts for chip gaps. Each exposure was 300s with a typical depth of 21.0 mag. The images were processed in real-time through the ZTF reduction and image subtraction pipelines at IPAC to search for potential counterparts (Masci et al. 2019). AMPEL (Nordin et al. 2019, Stein et al. 2021) was used to search the alerts database for candidates. We reject stellar sources (Tachibana and Miller 2018) and moving objects, and apply machine learning algorithms (Mahabal et al. 2019) . We are left with the following high-significance transient candidates by our pipeline, all lying within the 90.0% localization of the skymap. No candidate counterparts were detected. ZTF and GROWTH are worldwide collaborations comprising Caltech, USA; IPAC, USA; WIS, Israel; OKC, Sweden; JSI/UMd, USA; DESY, Germany; TANGO, Taiwan; UW Milwaukee, USA; LANL, USA; TCD, Ireland; IN2P3, France. GROWTH acknowledges generous support of the NSF under PIRE Grant No 1545949. Alert distribution service provided by DIRAC@UW (Patterson et al. 2019). Alert database searches are done by AMPEL (Nordin et al. 2019). Alert filtering is performed with the nuztf (Stein et al. 2021, https://github.com/desy-multimessenger/nuztf ). View this GCN Circular online at https://gcn.nasa.gov/circulars/35989. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 33841] GRB 240328C: Glowbug gamma-ray detection
by GCN Circulars 28 Mar '24

28 Mar '24

TITLE: GCN CIRCULAR NUMBER: 35988 SUBJECT: GRB 240328C: Glowbug gamma-ray detection DATE: 24/03/28 20:59:17 GMT FROM: C.C. Cheung at Naval Research Lab <Teddy.Cheung(a)nrl.navy.mil> C.C. Cheung, R. Woolf, M. Kerr, J.E. Grove (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge, D. Kocevski (MSFC), and M.S. Briggs (UAH) report: The Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 240328C. Using an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2024-03-28 00:37:54.024 with a duration of 4.1 s and a total significance of about 16.9 sigma. The light curve comprises a single peak. Using a standard power-law function with an exponential high-energy cutoff [3] to model the emission over this duration results in a poorly constrained power-law index and a cutoff energy ("Epeak") of 213 keV. The modeled 10-10000 keV fluence is 5.3e-07 erg/cm^2. The best-fit localization is RA, Decl. (J2000, deg) = 165.0, 30.6 with a radius of 27.8 deg (95% confidence), with a highly uncertain systematic uncertainty. The analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS. Glowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Program’s STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV. [1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959 [2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O [3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006 Distribution Statement A: Approved for public release. Distribution is unlimited. View this GCN Circular online at https://gcn.nasa.gov/circulars/35988. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0