GCN Circular 16278
Subject
GRB 140515A: Optical observations from the 2.5 m NOT
Date
2014-05-16T00:30:12Z (10 years ago)
From
Antonio de Ugarte Postigo at IAA-CSIC <deugarte@iaa.es>
A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), J. Gorosabel
(IAA-CSIC, UPV-EHU), D. Xu (DARK/NBI), J.P.U. Fynbo
(DARK/NBI), P. Jakobsson (U. Iceland), D. Malesani
(DARK/NBI), N.R. Tanvir (U. Leicester), E. Gafton
(OKC, Stockholm Univ.) and T. Libbrecht (Stockholm Univ.)
report on behalf of a larger collaboration:
We have observed the afterglow of GRB 140515A (D'Avanzo et al.,
GCN 16267) with the 2.5m NOT telescope. Observations consisted
of 5x300s imaging in the z-band and have an average epoch of
12.10 hr after the burst. The images reveal the optical afterglow
detected by Chornock et al. (GCN 16269) and Fong et al. (GCN
16274) at a magnitude of z(AB) = 22.15+/-0.15, as compared with
SDSS stars. This indicates a decay with a slope of alpha ~ -0.9
(where F_nu~t^alpha) as compared with the photometry of Fong
et al. (GCN 16274). Further observations are ongoing.