GCN Circular 19102
Subject
GRB 160225A: TSHAO optical afterglow detection
Date
2016-02-27T21:44:21Z (8 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Kusakin (Fesenkov Astrophysical Institute), I. Reva
(Fesenkov Astrophysical Institute), A. Volnova (IKI), A. Pozanenko (IKI)
report on behalf of larger GRB follow-up collaboration:
We observed the Swift GRB 160225A (Siegel et al., GCN 19075) with
Zeiss-1000 (West, East) 1-m telescopes of Tien Shan Astronomical
Observatory. We obtained several images in R filter starting on Feb. 25
(UT) 14:45:56. In the first images we do not detect any optical source
(Mazaeva et al., GCN 19078). In combine images we detect afterglow
(Yoshiiet al., GCN 19080; Kuroda al., GCN 19081; Wiersema al., GCN
19082). Preliminary photometry of combined images is following
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
*2016-02-25 14:45:56 0.07022 R 87*90 20.75 0.16 21.4
2016-02-25 15:30:59 0.09576 R 77*90 21.36 0.20 21.9
2016-02-25 17:58:10 0.18146 R 52*90 n/d n/a 21.7
*) Zeiss-1000 West telescope observations
Photometry is based on SDSS-DR9 nearby stars
SDSS-DR9_id R(Lupton)
J105614.20+533500.1 15.35
J105714.63+533304.9 14.36
J105658.91+533304.1 15.77