TITLE: GCN CIRCULAR NUMBER: 39484 SUBJECT: EP250226a: Global MASTER-Net observations report DATE: 25/02/26 08:09:29 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-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) was pointed to the EP250226a ( EP Team et al., GCN 39482) errorbox 460 sec after notice time and 3834 sec after trigger time at 2025-02-26 07:39:10 UT, with upper limit up to 20.4 mag. The observations began at zenith distance = 56 deg. The sun altitude is -32.9 deg.
The galactic latitude b = 60 deg., longitude l = 28 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2792303
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________
3865 | 2025-02-26 07:39:10 | MASTER-OAFA | (14h 57m 01.08s , +20d 57m 34.1s) | C | 60 | 20.4 | 4736 | 2025-02-26 07:53:41 | MASTER-OAFA | (14h 57m 24.39s , +21d 12m 59.9s) | C | 60 | 20.4 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
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