MASTER OT J205357.98-530820.3 - bright optical counterpart of GRB 210714A / Fermi tr.647942198
ATel #14796; T. Pogrosheva, V. Lipunov, V. Kornilov, E. Gorbovskoy, N. Tyurina, P. Balanutsa, V. Vladimirov, A. Kuznetsov, D. Vlasenko, I. Gorbunov, D. Zimnukhov, V. Senik, V. Topolev, F. Balakin, D. Cheryasov (Lomonosov Moscow State University, SAI, PhysicsDepartment), O. A. Gres, N. M. Budnev (Irkutsk State University, API), R. Podesta, F. Podesta, C. Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V. Yurkov (Blagoveschensk Educational StateUniversity)
on 18 Jul 2021; 09:02 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Gamma-Ray Burst, Transient, Variables
MASTER OT J205357.98-530820.3 discovery - bright optical counterpart detection with fast decay of Fermi trigger 647942198 / GRB 210714A
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 GRB210714.33 (trigger No 647942198 https://gcn.gsfc.nasa.gov/other/647942198.fermi, 20h 46m 43.20s , -52d 12m 36.0s, R=1.38d) errorbox 150 sec after notice time and 181 sec after trigger time at 2021-07-14 07:59:34 UT, with upper limit up to 19.5 mag (Lipunov et al. , GCN #30461 , GCN #30466 , cover map by MASTER) . The observations began at zenith distance = 34 deg. The sun altitude is -44.8 deg.
MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 20h 53m 57.98s -53d 08m 20.3s on 2021-07-14.35751 UT with fast decay typical for GRB OT light curve.
The OT magnitude (unfiltered)at 08:52:10UT(ttrigger=07:56:33) 16.1m
(mlim=18.7).
We have reference image on 2016-07-30.14890 UT with unfiltered 20.3m.
Spectral observations of host galaxy (presents in VIZIER) are required.
MASTER Global Robotic Net
