GCN Circular 10665
Subject
GRB 100418A: ROVOR optical measurements at 35 hours
Date
2010-04-23T23:41:42Z (14 years ago)
From
J. Ward Moody at BYU <rovor.byu@gmail.com>
J. W. Moody, D. Laney, R. Pearson, and C. Pace report for the BYU ROVOR team:
Beginning approximately 35 hours after the initial detection of GRB 100418A we
obtained BVR optical data using the BYU WMO 0.9m telescope.
Preliminary magnitudes were found by referencing against USNO-B1.0
star 1014-0271368 (RA(J2000) = 17:05:26.42, Dec(J2000) = +11:27:32.9).
Assuming its values are B=18.66, R=17.32 (from catalog) and V=18.0
(our estimate) we obtain the following values:
post burst
t_mid(hr) exp.(min) filter mag. error
37.18 25 B 19.9 0.15
35.91 25 V 19.3 0.1
35.25 20 R 18.5 0.1
Poor weather has prevented subsequent observations.