TITLE: GCN CIRCULAR NUMBER: 36375 SUBJECT: Fermi GRB 240502A: Global MASTER-Net observations report DATE: 24/05/02 19:16:15 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@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 240502A ( Fermi GBM team, GCN 36368) errorbox 46958 sec after notice time and 46965 sec after trigger time at 2024-05-02 18:31:27 UT, with upper limit up to 18.7 mag. The observations began at zenith distance = 62 deg. The sun altitude is -32.6 deg. The galactic latitude b = 29 deg., longitude l = 203 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2441106 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 46996 | 2024-05-02 18:31:27 | MASTER-SAAO | (08h 19m 34.86s , +20d 20m 09.8s) | C | 60 | 13.6 | 47758 | 2024-05-02 18:44:09 | MASTER-SAAO | (08h 15m 33.10s , +18d 15m 45.7s) | C | 60 | 13.8 | 48004 | 2024-05-02 18:48:15 | MASTER-SAAO | (08h 03m 20.96s , +20d 20m 31.2s) | C | 60 | 17.3 | 48004 | 2024-05-02 18:48:15 | MASTER-SAAO | (08h 05m 14.40s , +20d 08m 06.3s) | C | 60 | 17.5 | 48163 | 2024-05-02 18:50:54 | MASTER-SAAO | (08h 25m 58.55s , +22d 14m 31.6s) | C | 60 | 16.7 | 48163 | 2024-05-02 18:50:54 | MASTER-SAAO | (08h 27m 53.50s , +22d 02m 06.2s) | C | 60 | 16.5 | 48243 | 2024-05-02 18:52:14 | MASTER-SAAO | (08h 29m 48.77s , +18d 28m 24.0s) | C | 60 | 17.7 | 48243 | 2024-05-02 18:52:14 | MASTER-SAAO | (08h 31m 41.21s , +18d 15m 58.6s) | C | 60 | 17.3 | 48722 | 2024-05-02 19:00:13 | MASTER-SAAO | (08h 13m 45.42s , +18d 27m 49.4s) | C | 60 | 17.0 | 48722 | 2024-05-02 19:00:13 | MASTER-SAAO | (08h 15m 37.44s , +18d 15m 24.0s) | C | 60 | 17.2 | 49011 | 2024-05-02 19:05:03 | MASTER-SAAO | (08h 19m 32.57s , +20d 21m 04.6s) | C | 60 | 15.6 | 49011 | 2024-05-02 19:05:03 | MASTER-SAAO | (08h 21m 25.86s , +20d 08m 39.0s) | C | 60 | 14.6 | 49091 | 2024-05-02 19:06:23 | MASTER-SAAO | (08h 03m 19.49s , +20d 22m 42.1s) | C | 60 | 13.2 | 49091 | 2024-05-02 19:06:23 | MASTER-SAAO | (08h 05m 12.58s , +20d 10m 15.8s) | C | 60 | 14.2 | 49171 | 2024-05-02 19:07:42 | MASTER-SAAO | (08h 09m 35.78s , +22d 15m 31.7s) | C | 60 | 17.9 | 49171 | 2024-05-02 19:07:42 | MASTER-SAAO | (08h 11m 30.29s , +22d 03m 05.6s) | C | 60 | 17.8 | 49251 | 2024-05-02 19:09:02 | MASTER-SAAO | (08h 26m 00.76s , +22d 17m 00.6s) | C | 60 | 18.7 | 49251 | 2024-05-02 19:09:02 | MASTER-SAAO | (08h 27m 55.49s , +22d 04m 34.8s) | C | 60 | 18.6 | 49330 | 2024-05-02 19:10:22 | MASTER-SAAO | (08h 29m 40.82s , +18d 28m 04.1s) | C | 60 | 18.5 | 49330 | 2024-05-02 19:10:22 | MASTER-SAAO | (08h 31m 33.07s , +18d 15m 38.5s) | C | 60 | 18.4 | 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/36375. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...