TNS Astronomical Transient Report No. 280513 [ 2025TNSTR4970....1B ]
Date Received (UTC): 2025-12-14 13:22:57
Date made public:
Sender: MASTER
Reporting Group: MASTER Discovery Data Source: MASTER
N.Budnev (ISU), V.Lipunov(Lomonosov MSU), O.Gress (ISU), P.Balanutsa, A.Kuznetsov, I.Panchenko, A.Sankovich, E.Gorbovskoy, D.Vlasenko, G.Antipov, N.Tiurina, I.Ionov, Ya.Kechin, I.Lipunov, A.Chasovnikov, V.A.Senik, Yu.Tselik (Lomonosov MSU), R.Mirgazov, A.Dyachok, O.Ershova (Irkutsk State University), 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.Sosnovskij (CrAO), 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) report/s the discovery of a new astronomical transient.
IAU Designation: AT 2025agvf
Discoverer internal name: MASTER OT J220050.55-090945.8
Coordinates (J2000): RA = 22:00:50.550 (330.210625) DEC = -09:09:45.80 (-9.162722)
Discovery date: 2025-12-14 10:49:16.032 (JD=2461023.95088)
Remarks: GRB 251214B afterglow, can be SN in 10-14days https://gcn.nasa.gov/circulars/events/grb-251214b
Photometry
Discovery (first detection):
Discovery date: 2025-12-14 10:49:16.032
Flux: 19.5 VegaMag
Filter: Other-
Instrument: Other
Telescope: Other
Remarks: MASTER-Tunka
Last non-detection:
Last non-detection date: 2025-11-16 11:15:17
Limiting flux: 20.8 VegaMag
Filter: Other-
Instrument: Other
Telescope: Other
Remarks: MASTER-Tunka
Archival info: Other
Remarks: MASTER
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025agvf
Date Received (UTC): 2025-12-14 13:22:57
Date made public:
Sender: MASTER
Reporting Group: MASTER Discovery Data Source: MASTER
N.Budnev (ISU), V.Lipunov(Lomonosov MSU), O.Gress (ISU), P.Balanutsa, A.Kuznetsov, I.Panchenko, A.Sankovich, E.Gorbovskoy, D.Vlasenko, G.Antipov, N.Tiurina, I.Ionov, Ya.Kechin, I.Lipunov, A.Chasovnikov, V.A.Senik, Yu.Tselik (Lomonosov MSU), R.Mirgazov, A.Dyachok, O.Ershova (Irkutsk State University), 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.Sosnovskij (CrAO), 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) report/s the discovery of a new astronomical transient.
IAU Designation: AT 2025agvf
Discoverer internal name: MASTER OT J220050.55-090945.8
Coordinates (J2000): RA = 22:00:50.550 (330.210625) DEC = -09:09:45.80 (-9.162722)
Discovery date: 2025-12-14 10:49:16.032 (JD=2461023.95088)
Remarks: GRB 251214B afterglow, can be SN in 10-14days https://gcn.nasa.gov/circulars/events/grb-251214b
Photometry
Discovery (first detection):
Discovery date: 2025-12-14 10:49:16.032
Flux: 19.5 VegaMag
Filter: Other-
Instrument: Other
Telescope: Other
Remarks: MASTER-Tunka
Last non-detection:
Last non-detection date: 2025-11-16 11:15:17
Limiting flux: 20.8 VegaMag
Filter: Other-
Instrument: Other
Telescope: Other
Remarks: MASTER-Tunka
Archival info: Other
Remarks: MASTER
Details of the new object can be viewed here: https://www.wis-tns.org/object/2025agvf