GCN Circular 10687
Subject
GRB 100424A: Liverpool Telescope Upper Limits
Date
2010-04-25T14:25:15Z (14 years ago)
From
Zach Cano at ARI/John Moores Liverpool <zec@astro.livjm.ac.uk>
Z. Cano, A. Melandri (Liverpool JMU), C. Guidorzi (U. Ferrara), C.
Mundell, R.J. Smith, D. Bersier, I.A. Steele, S. Kobayashi, C.J. Mottram,
(Liverpool JMU), A. Gomboc (U. Ljubljana) report, on behalf of a larger
collaboration:
We observed the field of GRB 100424A (Hoversten et al. GCNC 10667) with
the Liverpool Telescope starting 20:54 UT on April 24, 2010. We do not
detect the NIR afterglow discovered by Cenko et al. (GCN 10682), nor any
other object within the enhanced XRT error circle (Evans, GCN 10668; Evans
et al., GCN 10669) down to the following limits:
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Mid Exposure Total
T-To (hrs) Exposure Time (min) Filter upper limit
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6.91 30 B >21.5
6.92 50 I >21.8
8.38 20 R >21.7
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The upper limits are for an isolated object in our images and are
calibrated using nearby stars in the USNO-B1 catalogue. No correction for
Galactic extinction has been made.