GCN Circular 9522
Subject
GRB 090618: LOAO R-band Observation
Event
Date
2009-06-18T15:01:20Z (16 years ago)
From
Myungshin Im at Seoul Nat U <mim@astro.snu.ac.kr>
M. Im, W.K. Park (CEOU/Seoul National Univ) and Y. Urata (NCU)
on behalf of EAFON team.
We observed GRB090618 (Schady et al. GCN 9512) in R using
the 1.0m telescope at Mt. Lemmon (Arizona, US) operated by
the Korea Astronomy Space Science Institute.
The observation started about 50min after the BAT trigger.
The first image taken with the mid-point at June 18,
09:52 UT (53m42s after the BAT trigger) shows a clear detection
of the afterglow at R=15.9 +- 0.1 mag, reported earlier by a number of
groups (GCN 9513, 9514, 9515, 9520).
The photometry was calibrated against R1mag of USNO-B1 stars
in the vicinity of GRB.
More data were taken, and they are being analyzed.
We thank the LOAO operator, Y. Baek for her assistance of this
observation.