TITLE: GCN CIRCULAR NUMBER: 38825 SUBJECT: Fermi trigger No 757753930: Global MASTER-Net observations report DATE: 25/01/06 01:45:37 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) started inspect of the Fermi GRB250105.30 (trigger No 757753930,15h 29m 04.08s , -16d 52m 58.8s, R=34.18) errorbox 1051 sec after notice time and 1074 sec after trigger time at 2025-01-05 07:30:00 UT, with upper limit up to 23.5 mag. The observations began at zenith distance = 42 deg. The sun altitude is -22.7 deg.
MASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB250105.30 errorbox 62179 sec after notice time and 62203 sec after trigger time at 2025-01-06 00:28:48 UT, with upper limit up to 18.3 mag. The observations began at zenith distance = 76 deg. The sun altitude is -30.0 deg.
The galactic latitude b = 31 deg., longitude l = 349 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2734281
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________
1105 | 2025-01-05 07:30:00 | MASTER-OAFA | (13h 16m 13.38s , -34d 52m 57.3s) | C | 60 | 20.4 | 1165 | 2025-01-05 07:30:00 | MASTER-OAFA | (13h 16m 13.37s , -34d 52m 57.4s) | C | 180 | 23.5 | Coadd 1180 | 2025-01-05 07:31:15 | MASTER-OAFA | (13h 16m 16.70s , -34d 51m 22.8s) | C | 60 | 20.4 | 1257 | 2025-01-05 07:32:32 | MASTER-OAFA | (13h 16m 10.26s , -34d 52m 03.5s) | C | 60 | 20.4 | 2047 | 2025-01-05 07:45:43 | MASTER-OAFA | (13h 16m 15.75s , -34d 51m 34.1s) | C | 60 | 20.4 | 2107 | 2025-01-05 07:45:43 | MASTER-OAFA | (13h 16m 15.75s , -34d 51m 34.0s) | C | 180 | 23.5 | Coadd 2123 | 2025-01-05 07:46:58 | MASTER-OAFA | (13h 16m 10.78s , -34d 52m 32.3s) | C | 60 | 20.4 | 2198 | 2025-01-05 07:48:13 | MASTER-OAFA | (13h 16m 15.88s , -34d 52m 10.2s) | C | 60 | 20.5 | 3048 | 2025-01-05 08:02:23 | MASTER-OAFA | (13h 16m 12.72s , -34d 52m 04.6s) | C | 60 | 20.5 | 3108 | 2025-01-05 08:02:23 | MASTER-OAFA | (13h 16m 12.72s , -34d 52m 04.6s) | C | 180 | 23.5 | Coadd 3126 | 2025-01-05 08:03:41 | MASTER-OAFA | (13h 16m 14.60s , -34d 50m 31.0s) | C | 60 | 20.5 | 3202 | 2025-01-05 08:04:57 | MASTER-OAFA | (13h 16m 09.57s , -34d 51m 26.5s) | C | 60 | 20.5 | 62208 | 2025-01-06 00:28:48 | MASTER-SAAO | (15h 54m 02.18s , -48d 37m 26.9s) | C | 10 | 17.2 | 62242 | 2025-01-06 00:29:17 | MASTER-SAAO | (15h 54m 02.27s , -48d 37m 24.0s) | C | 20 | 17.7 | 62281 | 2025-01-06 00:29:56 | MASTER-SAAO | (15h 54m 02.28s , -48d 37m 21.9s) | C | 20 | 17.6 | 62325 | 2025-01-06 00:30:35 | MASTER-SAAO | (15h 54m 02.35s , -48d 37m 19.8s) | C | 30 | 17.8 | 62379 | 2025-01-06 00:31:24 | MASTER-SAAO | (15h 54m 02.34s , -48d 37m 18.9s) | C | 40 | 18.0 | 62443 | 2025-01-06 00:32:23 | MASTER-SAAO | (15h 54m 02.28s , -48d 37m 17.6s) | C | 50 | 18.1 | 62596 | 2025-01-06 00:34:51 | MASTER-SAAO | (15h 54m 02.21s , -48d 37m 17.2s) | C | 60 | 18.3 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
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