GCN Circular 31586
Subject
GRB 220210A: Mondy, AbAO and Terskol optical upper limits
Event
Date
2022-02-12T22:20:24Z (4 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
N. Pankov (HSE), A. Pozanenko (IKI), E. Klunko (ISZF), R. Ya.
Inasaridze (AbAO), I. Sokolov (INASAN, KIAM), I. Izvekova (Institute of
Physics of NAS, ICAMBR of NAS), A. Shein (INASAN), Y. Markus (Institute
of Physics of NAS, ICAMBR NAS), Y. Markelov (KIAM), G. Butenko (ICAMBR
NAS), S. Belkin (IKI, HSE) report on behalf of GRB IKI:
We observed the field of Swift/BAT-GUANO localization (Tohuvavohu et
al., GCN 31572) of GRB 220210A (Fermi GBM team, GCN 31568) with
AZT-33IK telescope of Mondy observatory, AS-32 telescope of Abastumani
observatory, and Zeiss-2000 telescope in R-filter. Within localization
area (Tohuvavohu et al., GCN 31572) we do not detect evident candidate
in comparison with SDSS DR12 catalogue. The object reported by BOOTES
team (Carrasco-Garcia et al., GCN 31573) is clearly visible in all of
our observations and do not show significant variability with R= 20.17
+/- 0.14 (0.54116 d), R= 20.05 +/- 0.13 (0.72701 d), and R=20.14 +/-
0.13 (0.77438 d). This highly reddened object visible in DDS-2 Infrared
Survey (Carrasco-Garcia et al., GCN 31574) is also presented in SDSS
DR12 as a star-like very red object with r=21.187.
Preliminary photometry of the field is following
Date UT start t-T0 Filter Exp. OT Err UL(3sigma) Telescope
2022-02-11 12:32:54 0.54116 R 23*120 n/d n/d 22.7 AZT-33IK
2022-02-11 16:58:32 0.72701 R 50*60 n/d n/d 21.9 AS-32
2022-02-11 19:41:36 0.77438 R 35*180 n/d n/d 22.2 Zeiss-2000
The photometry is based on the nearby USNO-B1.0 stars
RA DEC R2
RA DEC R2
345.7846139 61.8542256 14.69
345.7584140 61.8282804 17.76