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July 2024

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[vsnet-grb-info 34649] GRB 240627A: CALET Gamma-Ray Burst Monitor detection
by GCN Circulars 01 Jul '24

01 Jul '24

TITLE: GCN CIRCULAR NUMBER: 36798 SUBJECT: GRB 240627A: CALET Gamma-Ray Burst Monitor detection DATE: 24/07/01 05:00:32 GMT FROM: Yuta Kawakubo at Aoyama Gakuin University <kawakubo(a)phys.aoyama.ac.jp> K. Kobayashi (Waseda U) A. Yoshida, T. Sakamoto, S. Sugita, Y. Kawakubo (AGU), K. Yamaoka (Nagoya U), S. Nakahira (JAXA), Y. Asaoka (ICRR), S. Torii, Y. Akaike (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), N. Cannady (GSFC/UMBC), M. L. Cherry (LSU), S. Ricciarini (U of Florence), P. S. Marrocchesi (U of Siena), and the CALET collaboration: The long GRB 240627A (AstroSat CZTI detection: Joshi et al., GCN Circ. 36776; NuSTAR Detection: Grefenstette et al., GCN Circ. 36778) was detected in the ground analysis of the CALET Gamma-ray Burst Monitor (CGBM) data around 23:59:01.50 on 27 June 2024 (referenced to the AstroSat detection: GCN Circ. 36776). (https://cgbm.calet.jp/cgbm_trigger/flight/1403567463/index.html) The burst signal was seen by only the SGM detector. The burst light curve shows a multi-peaked structure that starts at T-7.5 sec and ends at T+8.0 sec. The T90 and T50 durations measured by the SGM data are 12.1 +/- 0.5 sec and 4.6 +/- 0.2 sec (40-1000 keV), respectively. The ground-processed light curve is available at https://cgbm.calet.jp/cgbm_trigger/ground/1403567463/index.html The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at Waseda University. View this GCN Circular online at https://gcn.nasa.gov/circulars/36798. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 34648] Fermi trigger No 741448122: Global MASTER-Net observations report
by GCN Circulars 01 Jul '24

01 Jul '24

TITLE: GCN CIRCULAR NUMBER: 36797 SUBJECT: Fermi trigger No 741448122: Global MASTER-Net observations report DATE: 24/07/01 00:30:57 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 GRB240630.58 (trigger No 741448122,02h 05m 55.20s , -30d 03m 00.0s, R=2.65) errorbox 34951 sec after notice time and 34985 sec after trigger time at 2024-06-30 23:31:42 UT, with upper limit up to 19.0 mag. The observations began at zenith distance = 78 deg. The sun altitude is -75.9 deg. The galactic latitude b = -73 deg., longitude l = 227 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2514130 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 35015 | 2024-06-30 23:31:42 | MASTER-SAAO | (01h 58m 25.32s , -33d 04m 44.5s) | C | 60 | 13.8 | 35094 | 2024-06-30 23:33:01 | MASTER-SAAO | (02h 07m 58.42s , -33d 06m 10.6s) | C | 60 | 13.4 | 36161 | 2024-06-30 23:50:48 | MASTER-SAAO | (01h 58m 25.83s , -33d 06m 20.0s) | C | 60 | 18.4 | 36240 | 2024-06-30 23:52:07 | MASTER-SAAO | (02h 08m 02.40s , -33d 04m 38.4s) | C | 60 | 18.4 | 36636 | 2024-06-30 23:58:43 | MASTER-SAAO | (01h 51m 34.96s , -27d 23m 20.3s) | C | 60 | 18.4 | 36716 | 2024-07-01 00:00:02 | MASTER-SAAO | (02h 00m 35.97s , -27d 24m 37.1s) | C | 60 | 18.7 | 36956 | 2024-07-01 00:04:03 | MASTER-SAAO | (01h 47m 31.75s , -31d 12m 03.4s) | C | 60 | 18.6 | 37115 | 2024-07-01 00:06:41 | MASTER-SAAO | (01h 58m 28.33s , -33d 06m 37.0s) | C | 60 | 18.4 | 37194 | 2024-07-01 00:08:01 | MASTER-SAAO | (02h 07m 58.99s , -33d 04m 31.5s) | C | 60 | 18.5 | 37591 | 2024-07-01 00:14:37 | MASTER-SAAO | (01h 51m 37.40s , -27d 24m 08.0s) | C | 60 | 18.4 | 37670 | 2024-07-01 00:15:57 | MASTER-SAAO | (02h 00m 33.34s , -27d 24m 53.2s) | C | 60 | 18.7 | 37909 | 2024-07-01 00:19:55 | MASTER-SAAO | (01h 47m 28.28s , -31d 12m 48.6s) | C | 60 | 18.7 | 38146 | 2024-07-01 00:23:53 | MASTER-SAAO | (01h 45m 24.43s , -29d 18m 25.6s) | C | 60 | 19.0 | 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/36797. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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