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GCN Circular 4040

GRB 050922C: break in the lightcurve
2005-09-26T20:13:40Z (19 years ago)
Brian Lindgren Jensen at U.of Copenhagen <>
Johan P. U. Fynbo, Brian L. Jensen, P�ll Jakobsson,
Jens Hjorth, Jesper Sollerman, Jos� Mar�a Castro Cer�n
(DARK, NBI), Karianne Holhjem (NOT, La Palma), Ricardo Salinas
(Universidad de Concepci�n, 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:
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