[vsnet-grb-info 8425] GRB 090926B: NOT optical observation
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Sun Sep 27 14:05:36 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 9941
SUBJECT: GRB 090926B: NOT optical observation
DATE: 09/09/27 05:05:31 GMT
FROM: Dong Xu at DARK,NBI <dong at astro.ku.dk>
D. Xu, D. Malesani (DARK/NBI), S. Barros (Queen Univ., Belfast), P.
Jakobsson (Univ. Iceland), report on behalf of a larger collaboration.
We observed the field of GRB 090926B (Grupe et al., GCN 9935) with the
NOT equipped with ALFOSC. Observations were carried out in the R and I
bands, at high airmass (~2.5), starting on 2009 Sep 27.122 UT (4.99 hr
after the GRB) and 27.146 UT (5.58 hr after the GRB), respectively.
No source is visible inside the enhanced X-ray error circle (Grupe et
al., GCN 9940; http://www.swift.ac.uk/xrt_positions), down to a limiting
magnitude R ~ 23 based on USNO-B1 stars in the field.
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