TITLE: GCN CIRCULAR NUMBER: 37364 SUBJECT: Fermi trigger No 746816563: Global MASTER-Net observations report DATE: 24/08/31 17:45:27 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 GRB240831.71 (trigger No 746816563,19h 07m 07.92s , +50d 15m 00.0s, R=29.85) errorbox 167 sec after notice time and 188 sec after trigger time at 2024-08-31 17:05:46 UT, with upper limit up to 15.7 mag. Observations started at twilight. The observations began at zenith distance = 77 deg. The sun altitude is -10.1 deg.
The galactic latitude b = 18 deg., longitude l = 81 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2583411
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________
218 | 2024-08-31 17:05:46 | MASTER-SAAO | (19h 11m 21.46s , +38d 53m 47.1s) | C | 60 | 15.7 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
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