GCN Circular 10398
Subject
GRB 100205A: BOAO/LOAO zYJK observation
Event
Date
2010-02-09T14:50:50Z (16 years ago)
From
Myungshin Im at Seoul Nat U <mim@astro.snu.ac.kr>
M. Im, Y. Jeon, W. Park (CEOU/Seoul National Univ),
H.-I. Sung (KASI) and Y. Urata (NCU) on behalf of EAFON team.
We observed the GRB100205A (GCN 10361 Racusin et al.)
with J and K-band using KASINICS instrument on the 1.8m telescope
at the Bohyunsan Optical Astronomy Observatory (BOAO), Korea,
starting from 2010-02-05, 17:28:13 UT. We also observed the GRB
with z and Y filters using the LOAO 1-m telescope,
starting from 2010-02-05, 10:37:51 UT.
We do not detect the afterglow at the reported position
(GCN 10361.; GCN 10366, Tanvir et al.) in any of the bands
with the upper limits summarized below.
Our non-detection in K suggests that the afterglow candidate
faded since the report of the K-band detection (GCN 10366;
GCN 10374 Cucchiara et al.), confirming that it is
an afterglow. The values for J and K-bands are preliminary,
and we are refining the photometry. The data analysis of
the 2nd night follow-up observation (z,Y) is on-going.
Filter z Y J K
-------------------------------------------------
3-sigma limit (AB) 22.3 20.8 22.3 22.5
mid-point(UT,hh:mm) 12:11 11:07 17:43 19:01
We thank the LOAO operator, J. Yoon for his assistance for this
observation.