TITLE: GCN CIRCULAR NUMBER: 33386 SUBJECT: Fermi trigger No 699311646: Global MASTER-Net observations report DATE: 23/03/01 08:15:31 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, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin (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. Gres, N.M. Budnev (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),
A. Gabovich, V.Yurkov (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 GRB230228.88 (trigger No 699311646,18h 19m 40.08s , -19d 42m 00.0s, R=9.4) errorbox 8447 sec after notice time and 8483 sec after trigger time at 2023-02-28 23:35:25 UT, with upper limit up to 17.0 mag. The observations began at zenith distance = 79 deg. The sun altitude is -48.7 deg.
The galactic latitude b = -3 deg., longitude l = 12 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2201725
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________
8514 | 2023-02-28 23:35:25 | MASTER-SAAO | (17h 34m 07.53s , -23d 36m 27.9s) | C | 60 | 17.0 | 8606 | 2023-02-28 23:36:57 | MASTER-SAAO | (17h 42m 56.85s , -23d 36m 38.2s) | C | 60 | 16.6 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.