GCN Circular 4040
Subject
GRB 050922C: break in the lightcurve
Event
Date
2005-09-26T20:13:40Z (20 years ago)
Edited On
2024-11-07T20:01:27Z (a year ago)
From
Brian Lindgren Jensen at U.of Copenhagen <brian_j@astro.ku.dk>
Edited By
Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>
Johan P. U. Fynbo, Brian L. Jensen, Páll Jakobsson,
Jens Hjorth, Jesper Sollerman, José María Castro Cerón
(DARK, NBI), Karianne Holhjem (NOT, La Palma), Ricardo Salinas
(Universidad de Concepción, Chile) report:
We have obtained further imaging of the afterglow of GRB 050922C
(GCN 4011, 4012, 4013) using the ALFOSC at the Nordic Optical
Telescope on La Palma and DFOSC at the Danish 1.5m telescope at La
Silla, Chile. We find that the early decay slope of about 1 (GCN 4012)
extends to less than a day post burst, after which the decay slope
steepens to about alpha=1.7+-0.3. Further observations are planned.
A preliminary lightcurve can be seen at:
http://www.astro.ku.dk/~brian_j/grb/grb050922.830/