[vsnet-grb-info 20205] GRB 180102A: TSHAO optical upper limit
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Thu Jan 4 02:34:42 JST 2018
TITLE: GCN CIRCULAR
NUMBER: 22301
SUBJECT: GRB 180102A: TSHAO optical upper limit
DATE: 18/01/03 17:34:05 GMT
FROM: Alexei Pozanenko at IKI, Moscow <apozanen at iki.rssi.ru>
E. Mazaeva (IKI), A. Pozanenko (IKI), I. Reva (FAPHI), M. Krugov
(FAPHI), A. Volnova (IKI), A. Kusakin (FAPHI) report on behalf of
larger GRB follow-up collaboration:
We observed the field of GRB 180102A (Page et al., GCN 22292) with
Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory starting
on Jan. 02 (UT) 21:34:54. We took several images in R-filter. We do not
detect any new sources within enhanced XRT error circle (Beardmore et
al., GCN 22294). Preliminary photometry of the field is following.
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2018-01-02 21:34:54 0.25428 R 21*120 n/d n/d 20.6
The photometry is based on several nearby USNO-B1.0 stars.
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