MASTER OT J070737.66-834306.1 discovery : optical counterpart of GRB 200107B
ATel #13390; V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), E. Gorbovskoy, V. Kornilov, N. Tiurina, O. Gress, I. Gorbunov, A. Kuznetsov, V. Vladimirov, D. Vlasenko, D. Zimnukhov, P. Balanutsa, D. Cheryasov, V. Senik, A. Chasovnikov, K. Zhirkov, A. Pozdnyakov, V. Shumkov, T. Pogrosheva, A. Chasovnikov, V. Grinshpun, E. Minkina, F. Balakin(Lomonosov MSU),R. Rebolo, M. Serra (IAC), R. Podesta, C. Lopez, F. Podesta, C. Francile (OAFA), H. Levato(ICATE), N. M. Budnev, O. Ershova(ISU, API), A. Tlatov, D. Dormidontov(Kislovodsk Solar Station of the Pulkovo Observatory),V. Yurkov, A. Gabovich, Yu. Sergienko(Blagoveschensk ESU)
on 7 Jan 2020; 21:29 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Gamma Ray, Request for Observations, Gamma-Ray Burst, Transient
MASTER OT J070737.66-834306.1 discovery - GRB 200107B optical counterpart discovery
AT 2020oj
MASTER GCN 26658, GCN 26660
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered gamma-ray burst optical counterpart at
(RA, Dec) = 07h 07m 37.66s -83d 43m 06.1s
on 2020-01-07.83383 UT (Lipunov et al. GCN 26658, GCN 26660) during MASTER alert observations
https://master.sai.msu.ru/site/master2/event.php?id=1253639
of Fermi GBM (GCN 26659) and Swift (GCN 26661) GRB 200107.81/GRB 200107B
.
This OT is inside 21.3arcsec of Swift XRT error-box (Bernardini et al. GCN 26661)
The OT changes, for example unfiltered magnitude
m=17.3m at 2020-01-07.83383UT,
m=17.9 at 2020-01-07.84459 UT.
The OT is seen in 16 images. There is no minor planet at this place.
We have reference image on 2019-02-14.98716 UT with unfiltered mlim= 20.4m.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/070737.66-834306.1.png
MASTER Global Robotic Net
