GCN Circular 10671
Subject
GRB 100424A: NOT optical observations
Date
2010-04-25T01:19:23Z (14 years ago)
From
Daniele Malesani at Dark Cosmology Centre, Niels Bohr Inst <malesani@dark-cosmology.dk>
D. Malesani (DARK/NBI), D. Xu (Weizmann Inst.), A. J. Levan (Univ.
Warwick), P. Jakobsson (Univ. Iceland), T. Pursimo (NOT), report on
behalf of a larger collaboration:
We observed the field of GRB 100424A (Hoversten et al., GCN 10667) with
the NOT equipped with ALFOSC in the R, I, and z filters. Observations
started on April 24 at 22:38, 23:05, and 23:31 UT in R, I, z,
respectively (6.30, 6.74, and 7.21 hr after the GRB), and were affected
by the closeby bright Moon (42 deg away, 85% full) and some clouds.
We do not detect any new object within the refined XRT error circle
(Evans, GCN 10668; Evans et al., GCN 10669). The limiting magnitudes are
R(Vega) = 22.5 and z(AB) = 21.9, calibrated against the USNO-B1 and SDSS
catalogs, respectively.
Given the relatively large X-ray flux, we encourage NIR observations.