[vsnet-grb-info 14835] GRB 140419A, LOAO R-band observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16149
SUBJECT: GRB 140419A, LOAO R-band observations
DATE:    14/04/23 12:04:51 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 140419ASwift GRB 140419A (Marshall et al., GCN
16118) in R-band using the 1-m telescope at Mt. Lemmon Optical Observatory
(LOAO) in Arizona, US

We obtained R-band images at two epochs on Apr. 19 and on Apr. 21. 
We marginally identify the afterglow in a stacked image for each night. 
The photometry is based on R1-mag of USNO-B1 stars in the observed field.

Details of Photometry are below:

date                          UT(mid time)         Filter           mag

2014/04/19                   07:30:51               R         18.64 +/-0.29 
2014/04/21                   03:39:38               R         21.43 +/-0.27

 


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