GCN Circular 45796
Subject
EP Alert 261003.01: Global MASTER-Net observations report
Date
2026-10-03T00:36:35Z (a day 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 EP Alert 261003.01 (trigger No 1709320865,20h 30m 05.76s , -12d 56m 09.6s, R=0.0510787) errorbox 20 sec after notice time and 366 sec after trigger time at 2026-10-03 00:20:50 UT, with upper limit up to 20.6 mag. The observations began at zenith distance = 19 deg. The sun altitude is -22.1 deg.
The galactic latitude b = -28 deg., longitude l = 33 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=3517655
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
402 | 2026-10-03 00:20:50 | MASTER-OAFA | (20h 28m 53.44s , -12d 56m 46.8s) | C | 70 | 19.9 |
502 | 2026-10-03 00:20:50 | MASTER-OAFA | (20h 28m 53.44s , -12d 56m 46.8s) | C | 270 | 20.6 | Coadd
487 | 2026-10-03 00:22:05 | MASTER-OAFA | (20h 28m 53.22s , -12d 56m 49.5s) | C | 90 | 20.1 |
594 | 2026-10-03 00:23:42 | MASTER-OAFA | (20h 28m 52.95s , -12d 56m 52.9s) | C | 110 | 20.1 |
720 | 2026-10-03 00:25:38 | MASTER-OAFA | (20h 28m 52.65s , -12d 56m 56.5s) | C | 130 | 20.1 |
871 | 2026-10-03 00:27:54 | MASTER-OAFA | (20h 28m 52.30s , -12d 57m 00.9s) | C | 160 | 20.2 |
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