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[vsnet-grb-info 1040] GRB 030418: Optical afterglow

Date: Fri, 18 Apr 2003 11:38:31 -0400 (EDT)
To: vsnet-grb-info@kusastro.kyoto-u.ac.jp
From: GCN Circulars <gcncirc@lheawww.gsfc.nasa.gov>
Subject: [vsnet-grb-info 1040] GRB 030418: Optical afterglow
Affiliation: NASA-GSFC LHEA
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TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2150
SUBJECT: GRB 030418: Optical afterglow
DATE:    03/04/18 15:35:07 GMT
FROM:    Paul Price at RSAA, ANU  <pap@mso.anu.edu.au>

P.A. Price, R. McNaught, G.J. Garradd, M.A. Verrender and T.M. Smith
(RSAA, ANU) report:

We have re-observed the GRB 030418 optical afterglow candidate (GCN #2148)
with the Siding Spring Observatory 40-inch telescope + Direct Imager.  
Our observations consisted of another 5x300 sec exposures in R-band,
commencing at April 18.61 UT.  Comparison of our two epochs reveals that
the source faded by about 1 magnitude between the two observations, being
R ~ 19.8 mag in the second epoch.  We therefore believe this source is the
optical afterglow of GRB 030418.

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