[vsnet-grb-info 17687] GRB 160227A: McDonald 0.8m Detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19124
SUBJECT: GRB 160227A: McDonald 0.8m Detection
DATE:    16/03/01 01:56:44 GMT
FROM:    Myungshin Im at Seoul Nat U  <mim at astro.snu.ac.kr>

Myungshin Im, Changsu Choi, Gu Lim (CEOU/SNU),
Soomin Jeong (SKKU/IAA-CSIC) on behalf of a larger collaboration

We observed the field of GRB 160227A (Palmer et al. GCN19098) using the
0.8m telescope at the McDonald Observatory. The observation started at
2016-02-28 03:03:38 UT, or about
7.5 hours after the BAT alert.
We identify the afterglow at the location of the UVOT detection,
and our preliminary analysis shows the afterglow
at R ~ 20.8 +- 0.15 mag in a stacked image of 21 x 3 min frames.
The mid-point of the observation is 2016-02-28 03:47.
The photometry is calibrated against a star at RA=194.74877
and Dec=78.68984 (J2000) with R=15.72, taken from APASS
catalog.
A second epoch data was taken at about 6 hours later, and the
analysis of the data is ongoing.