GCN Circular 26818
Subject
GRB 200115A: Mondy optical observations and correction to GCN 26790
Date
2020-01-19T17:33:26Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), K. Kamyshnikov
(HSE), N. Pankov (HSE), E. Mazaeva (IKI), S. Belkin (IKI) report on
behalf of GRB IKI FuN:
We observed the field of GRB 200115A (Cenko et al., GCN 26771) with
AZT-33IK telescope of Sayan observatory (Mondy) starting on Jan. 16 (UT)
12:30:28. Within BAT ground-calculated position (Laha et al. GCN
26780) we do not detect any unidentified objects in comparison with
SDSS-DR2. We also not detected the afterglow candidate reported after
our first epoch observation (Pozanenko et al., GCN 26790).
We report the correction of R-magnitude of the afterglow candidate.
The result presented below overrides previously reported (GCN 26790)
R-magnitude. We apologize for the typo and possible inconvenience.
Due to shallow upper limit in the second epoch observation we cannot
confirm variability of the afterglow candidate.
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2020-01-15 11:55:00 0.02455 R 30*120 21.9 0.2 22.1
2020-01-16 12:30:28 1.05039 R 32*120 n/d n/d 21.6
The photometry is based on the nearby SDSS DR12 stars
SDSS R_Lupton
J034551.63+053704.5 17.138 0.016
J034547.51+053555.6 18.214 0.029
J034543.70+053549.4 17.851 0.022