GCN Circular 22246
Subject
GRB 171212A/Swift J1935.7+2036: TSHAO optical observations
Date
2017-12-12T19:18:46Z (6 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Pozanenko (IKI), I. Reva (FAPHI), M. Krugov
(FAPHI), A. Kusakin (FAPHI), A. Volnova (IKI) report on behalf of
larger GRB follow-up collaboration:
We observed the field of GRB 171212A (Tohuvavohu et al., GCN 22243)
with Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory
starting on Dec. 12 (UT) 12:21:15. We took several images in R-filter.
Within enhanced Swift-XRT error circle (Evans et al. GCN 22245) we do
not detect any object. Preliminary photometry of initial combined images
is following.
Date UT start t-T0 Filter Exp. OT Err. ULim
(mid, days) (s)
2017-12-12 12:21:15 0.01896 R 3*120 n/d n/d 20.0
2017-12-12 12:21:15 0.02728 R 13*120 n/d n/d 21.1
The photometry is based on several nearby USNO-B1.0 stars
USNO-B.1_id R2
1105-0415742 17.60
1105-0415769 17.54
1105-0415805 16.38
1106-0408959 17.07
1105-0415666 16.91