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GCN Circular 6418

Subject
GRB070518: OSN observation
Date
2007-05-19T01:04:27Z (18 years ago)
From
Martin Jelinek at Inst.Astrophys.Andalucia,Granada <mates@iaa.es>
Martin Jelinek, Alberto J. Castro-Tirado, Victor Casanova,
Javier Gorosabel, Antonio de Ugarte Postigo, Stanislav Vitek,
Ronan Cunniffe and Petr Kubanek (IAA CSIC Granada, Spain)

report

We observed the optical afterglow of GRB070518 (Guidorzi et
al, GCN6415) with a 1.5m telescope at Observatorio Sierra
Nevada using R and I-band filters. The afterglow is found to
have R~22.2, relatively to the nearby USNO-A2.0 (R_usno=18.7)
on a 60-minute combined image with exposure mean time 23:04UT
(i.e. 8.6h after the GRB). 

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