TITLE: GCN CIRCULAR NUMBER: 37368 SUBJECT: Fermi trigger No 746882332: Global MASTER-Net observations report DATE: 24/09/01 17:31:18 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 GRB240901.47 (trigger No 746882332,23h 53m 43.20s , -25d 50m 24.0s, R=11.84) errorbox 20670 sec after notice time and 20707 sec after trigger time at 2024-09-01 17:03:55 UT, with upper limit up to 13.9 mag. Observations started at twilight. The observations began at zenith distance = 79 deg. The sun altitude is -9.6 deg.
The galactic latitude b = -78 deg., longitude l = 37 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2584305
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________
20738 | 2024-09-01 17:03:55 | MASTER-SAAO | (23h 31m 07.60s , -29d 19m 44.7s) | C | 60 | 13.9 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
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