MASTER OT J204422.34-625641.8 - optical counterpart of GRB 200803A
ATel #13916; V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), E. Gorbovskoy, V. Kornilov, I. Gorbunov, N. Tiurina, O. Gress, A. Gabovich, A. Kuznetsov, F. Balakin, V. Vladimirov, K. Zhirkov, E. Minkina, D. Zimnukhov, A. Chasovnikov, V. Senik, D. Kuvshinov, T. Pogrosheva, D. Vlasenko, D. Cheryasov, V. Shumkov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, F. Podesta, C. Francile (OAFA), H. Levato (ICATE), R. Rebolo, M. Serra (IAC), N. Budnev (ISU, API), A. Tlatov (KSS of the Pulkovo Observatory), Yu. Sergienko, V. Yurkov(BSPU)
on 3 Aug 2020; 21:53 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Gamma Ray, Gamma-Ray Burst, Transient, Variables
MASTER OT J204422.34-625641.8 discovery - optical counterpart of GRB 200803A
During Fermi GBM GRB200803A (GCN #28196, Ttrigger=03:34:26.57UT)
alert observations (Lipunov et al. GCN #28198, GCN #28199, MASTER cover map),
started 47 sec after notice time (74 sec after trigger time) at 2020-08-03 03:35:40 UT
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic
Net", Advances in Astronomy, 2010, 30L )
discovered OT source at
(RA, Dec) = 20h 44m 22.34s -62d 56m 41.8s with unfiltered m_OT=15.8 (Lipunov et al. GCN #29202).
This OT was found inside Fermi LAT (GCN #29203) error-box and confirmed by Swift afterglow detection (Osborne et al. GCN #29205).
The OT is seen in 13 images and has classic light curve with growth and decay.
We have reference image on 2015-04-04.15164 UT with unfiltered mlim= 19.9m.
Spectral observations and deep photometry for host galaxy are required.
MASTER Global Robotic Net
