TITLE: GCN CIRCULAR NUMBER: 39295 SUBJECT: Integral GRB250211.89: Global MASTER-Net observations report DATE: 25/02/12 01:19:50 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs lipunov@xray.sai.msu.ru
V.Lipunov, E.Gorbovskoy, N.Tiurina, P.Balanutsa, , D.Vlasenko, I.Panchenko, A.Kuznetsov, G.Antipov, A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity) D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory)
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) was pointed to the Integral GRB250211.89 (trigger No 11044,18h 25m 33.49s , -31d 57m 36.2s, R=0.0533333) errorbox 12195 sec after notice time and 12210 sec after trigger time at 2025-02-12 00:51:28 UT, with upper limit up to 16.7 mag. The observations began at zenith distance = 81 deg. The sun altitude is -36.1 deg.
The galactic latitude b = -10 deg., longitude l = 2 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2775663
We obtain a following upper limits.
Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________
12300 | MASTER-SAAO | C | 180 | 16.1 | 12480 | MASTER-SAAO | C | 540 | 15.8 | Coadd 12500 | MASTER-SAAO | C | 180 | 16.2 | 12699 | MASTER-SAAO | C | 180 | 16.4 | 12904 | MASTER-SAAO | C | 180 | 16.4 | 13103 | MASTER-SAAO | C | 180 | 16.5 | 13302 | MASTER-SAAO | C | 180 | 16.6 | 13502 | MASTER-SAAO | C | 180 | 16.7 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
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