[vsnet-grb-info 14375] LOAO R-band Observation of GRB 140102A

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15689
SUBJECT: LOAO R-band Observation of GRB 140102A 
DATE:    14/01/06 02:52:23 GMT
FROM:    Changsu Choi at Seoul Nat U  <changsu at astro.snu.ac.kr>

Changsu Choi, Myungshin Im (CEOU/SNU), Hyun-Il Sung (KASI), and Yuji Urata
(NCU), on behalf of EAFON

 

We observed the field of GRB 140102A (Hagen et al., GCN 15653) in R-band
using the 1-m telescope at Mt. Lemmon Optical Observatory (LOAO) in Arizona,
US

 

The observation started at 2014-01-03 13:01:40 UT, or about 15.34 hours
after the BAT alert.

We marginally identify the afterglow in a stacked image with a total
exposure time of ~ 45min. The approximate magnitude of the object is R(Vega)
= 21.5 +- 0.3 mag, calibrated against R1-mag of USNO-B1 stars in the
vicinity. 

We thank the LOAO operator, Jae-Hyuk Yoon for performing the observation.