[AAVSO-HEN] GRB 070531: I-band observations from IAC80

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
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TITLE:   GCN CIRCULAR
NUMBER:  6478
SUBJECT: GRB 070531: I-band observations from IAC80
DATE:    07/05/31 10:08:01 GMT
FROM:    Antonio Deugarte at IAA-CSIC  <deugarte at iaa.es>

A. de Ugarte Postigo, A.J. Castro-Tirado (IAA-CSIC,
Granada), J. Benko (Konkoly Observatory, Hungary)
and A. de la Nuez (IAC Tenerife), on behalf of a larger
collaboration, report:

"We have observed the field of GRB 070531 (Markwardt
et al., GCNC 6475) in I-band using the IAC80 telescope
at Izaña Observatory (Spain) starting at 04:01 UT (1.85
hours after the burst). A combined image of 3960 s
does not show any source within the XRT error box
(Page et al. GCNC 6477). The image is significantly
deeper than the DSS2.

The image is posted at:

http://www.iaa.es/~deugarte/GRBs/070531/GRB070531.gif "

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