TITLE: GCN CIRCULAR NUMBER: 38871 SUBJECT: EP250109a: Global MASTER-Net observations report DATE: 25/01/09 13:10:18 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-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the EP250109a ( EP Team et al., GCN 38864) errorbox 10841 sec after notice time and 22040 sec after trigger time at 2025-01-09 12:25:18 UT, with upper limit up to 16.2 mag. The observations began at zenith distance = 77 deg. The sun altitude is -28.1 deg.
The galactic latitude b = -18 deg., longitude l = 218 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2739026
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________
22049 | 2025-01-09 12:25:18 | MASTER-Tunka | (05h 55m 17.63s , -12d 32m 20.4s) | C | 15 | 15.5 | 22083 | 2025-01-09 12:25:53 | MASTER-Tunka | (05h 55m 17.99s , -12d 31m 16.2s) | C | 15 | 15.4 | 22112 | 2025-01-09 12:26:21 | MASTER-Tunka | (05h 55m 24.27s , -12d 32m 15.0s) | C | 15 | 15.4 | 22139 | 2025-01-09 12:26:48 | MASTER-Tunka | (05h 55m 19.06s , -12d 33m 13.7s) | C | 15 | 14.9 | 22165 | 2025-01-09 12:27:15 | MASTER-Tunka | (05h 55m 24.58s , -12d 32m 56.1s) | C | 15 | 14.9 | 22191 | 2025-01-09 12:27:41 | MASTER-Tunka | (05h 55m 21.14s , -12d 31m 40.0s) | C | 15 | 14.8 | 22503 | 2025-01-09 12:32:57 | MASTER-Tunka | (05h 55m 20.91s , -12d 32m 45.4s) | C | 5 | 15.5 | 22522 | 2025-01-09 12:33:16 | MASTER-Tunka | (05h 55m 24.47s , -12d 31m 13.3s) | C | 5 | 15.4 | 22540 | 2025-01-09 12:33:33 | MASTER-Tunka | (05h 55m 17.12s , -12d 31m 49.4s) | C | 8 | 15.3 | 22560 | 2025-01-09 12:33:53 | MASTER-Tunka | (05h 55m 18.59s , -12d 30m 47.9s) | C | 8 | 15.3 | 22582 | 2025-01-09 12:34:16 | MASTER-Tunka | (05h 55m 23.95s , -12d 31m 47.5s) | C | 8 | 15.2 | 22604 | 2025-01-09 12:34:37 | MASTER-Tunka | (05h 55m 18.35s , -12d 32m 43.7s) | C | 8 | 15.2 | 22626 | 2025-01-09 12:35:00 | MASTER-Tunka | (05h 55m 23.61s , -12d 32m 10.6s) | C | 8 | 15.3 | 22648 | 2025-01-09 12:35:21 | MASTER-Tunka | (05h 55m 20.84s , -12d 31m 08.9s) | C | 8 | 14.8 | 22671 | 2025-01-09 12:35:43 | MASTER-Tunka | (05h 55m 20.86s , -12d 32m 22.5s) | C | 10 | 14.6 | 22694 | 2025-01-09 12:36:07 | MASTER-Tunka | (05h 55m 23.91s , -12d 31m 03.4s) | C | 10 | 14.3 | 22718 | 2025-01-09 12:36:30 | MASTER-Tunka | (05h 55m 18.05s , -12d 31m 34.6s) | C | 10 | 14.6 | 22741 | 2025-01-09 12:36:55 | MASTER-Tunka | (05h 55m 18.67s , -12d 30m 33.0s) | C | 5 | 14.6 | 22774 | 2025-01-09 12:37:28 | MASTER-Tunka | (05h 55m 23.56s , -12d 31m 31.8s) | C | 5 | 14.9 | 22794 | 2025-01-09 12:37:48 | MASTER-Tunka | (05h 55m 17.70s , -12d 32m 31.2s) | C | 5 | 15.0 | 22814 | 2025-01-09 12:38:07 | MASTER-Tunka | (05h 55m 24.18s , -12d 32m 28.8s) | C | 10 | 15.3 | 24449 | 2025-01-09 13:05:18 | MASTER-Tunka | (05h 55m 20.96s , -12d 29m 25.1s) | C | 15 | 16.2 | 24477 | 2025-01-09 13:05:46 | MASTER-Tunka | (05h 55m 20.83s , -12d 30m 45.1s) | C | 15 | 15.0 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
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