GCN Circular 22463
Subject
GRB 180305A: Mondy optical observations
Date
2018-03-06T17:07:13Z (6 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), A. Volnova
(IKI) report on behalf of of larger GRB follow-up collaboration:
We observed the field of LAT/Fermi GRB 180305A (Axelsson, et al., GCN
22457) and Konus-Wind (Svinkin et al., GC 22461) with AZT-33IK telescope
of Sayan observatory (Mondy). We obtained several images in R-filter
starting on Mar. 06 (UT) 12:35:17. The afterglow candidate (Troja et
al., GCN 22460) is clearly detected within XRT/Swift error circle
(D'Avanzo et al., GCN 22462). Preliminary photometry is following.
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2018-03-06 12:35:17 1.15219 R 30*120 22.69 0.15 23.7
The photometry is based on nearby USNO-B1.0 stars
USNO-B1_id R2
1221-0050419 18.60
1221-0050432 16.39
1221-0050407 19.31
Since the source has faded in comparison with the previous observation
(Troja et al., GCN 22460) we can confirm the afterglow of GRB 180305A.