GCN Circular 45842
Subject
SVOM GRB261007.27: Global MASTER-Net observations report
Event
Date
2026-10-07T17:56:24Z (6 hours ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
email
M. Segura, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA)
V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko,
G.Antipov, A.Sankovich, Yu.Tselik, Ya..Kechin, V.Senik, A.Chasovnikov, K.Labsina (Lomonosov MSU)
D.Buckley (SAAO),
A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity)
A.Sosnovskij (Lomonosov MSU)
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory)
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory)
R.Rebolo (The Instituto de Astrofisica de Canarias)
O.Gress, N.Budnev(ISU)
MASTER-OAFA robotic telescope [1] located in Argentina (OAFA observatory of San Juan National University) was pointed to the SVOM GRB261007.27 (trigger No 1791354426,00h 46m 26.14s , -17d 41m 36.2s, R=0.0133) errorbox 1673 sec after trigger time at 2026-10-07 06:54:59 UT, with upper limit up to 19.7 mag. The observations began at zenith distance = 38 deg. The sun altitude is -38.3 deg.
The galactic latitude b = -80 deg., longitude l = 119 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=3521975
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
1723 | 2026-10-07 06:54:59 | MASTER-OAFA | (00h 45m 40.99s , -17d 45m 01.6s) | C | 100 | 19.7 |
1839 | 2026-10-07 06:56:45 | MASTER-OAFA | (00h 45m 41.02s , -17d 45m 00.3s) | C | 120 | 17.9 |
1975 | 2026-10-07 06:58:51 | MASTER-OAFA | (00h 45m 41.02s , -17d 44m 59.8s) | C | 140 | 18.0 |
2137 | 2026-10-07 07:01:17 | MASTER-OAFA | (00h 45m 41.07s , -17d 44m 59.5s) | C | 170 | 17.0 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
[1] - V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina & A.S.Kuznetsov, 2023, Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp.
http : // www.pereplet.ru/lipunov/625.html