[vsnet-grb-info 19404] GRB 170519A: NOT optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sat May 20 08:54:05 JST 2017
TITLE: GCN CIRCULAR
NUMBER: 21120
SUBJECT: GRB 170519A: NOT optical observations
DATE: 17/05/19 23:53:45 GMT
FROM: Antonio de Ugarte Postigo at IAA-CSIC <deugarte at iaa.es>
A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), D. Xu (NAOC),
D. Malesani (DARK/NBI), K.E. Heintz (DARK/NBI),
D. Gandolfi (Univ. Turin), and J. Telting (NOT) report on behalf
of a larger collaboration,
We have observed the field of GRB 170519A (Ukwatta et al.,
GCN 21106) with the 2.5m Nordic Optical Telescope at La
Palma (Spain). The observations consisted of 3x120s in V-band
and 5x120s in Sloan i-band. The GRB afterglow is well detected in
all the individual frames. On an image starting at 21:51 UT (16.68 hr
after the burst) we detect the optical afterglow at i(AB) = 19.7 mag,
as compared to SDSS field stars. This confirms the t^(-0.8) decay
reported by Butler et al. (GCN 21109) and by Zheng et al.
(GCN 21115) that started 900 s after the GRB trigger.
More information about the vsnet-grb-info
mailing list