GCN Circular 9644
Subject
GRB 090709A: NOT optical observations
Date
2009-07-10T00:10:54Z (15 years ago)
From
Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani@astro.ku.dk>
D. Malesani (DARK/NBI), J. Telting (NOT), P. Wilson (NOT and Univ.
Oslo), P. Jakobsson (Univ. Iceland), J.P.U. Fynbo, G. Leloudas
(DARK/NBI), A.J. Levan (Univ. Warwick), and K. Wiersema (Univ.
Leicester), report on behalf of a larger collaboration:
We observed the field of GRB 090709A (Morris et al., GCN 9625) with the
NOT equipped with ALFOSC. Observations were carried out in the R band,
starting on 2009 Jul 9.943 (14.97 hr after the trigger), for a total
exposure time of 30 min.
At the position of the NIR transient (Aoki et al., GCN 9634; Morgan et
al., GCN 9635) we do not detect any source, down to a limiting magnitude
R >~ 24. The calibration is based on a number of closeby USNO-B1 stars
(R2 magnitudes).