[vsnet-grb-info 1911] GRB050801: Unchanged decay slope

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3743
SUBJECT: GRB050801: Unchanged decay slope
DATE:    05/08/03 10:00:32 GMT
FROM:    Brian Lindgren Jensen at U.of Copenhagen  <brian_j at astro.ku.dk>

GRB050801.769: Unchanged decay slope

J. P. U. Fynbo, B. L. Jensen, J. Hjorth, K. G. Woller, D. Watson,
J. Sollerman (Niels Bohr Institute), P. Fouque (Obs-MiP, Toulouse),
M. I. Andersen (Potsdam, AIP) report on behalf of the DARK Cosmology
Centre:

"We have obtained additional DK-1.5m R-band imaging (Aug 3.0 UT) of the
optical afterglow (Rykoff et al. GCN#3726) of GRB050801.769 (Band et
al. GCN#3725).
Extending the fit from Fynbo et al. (GCN#3726) yields a smooth
well-fitting power-law from t-t0=0.44h to 29.5h, with an R-band decay
slope of -1.31 +- 0.04.

The lightcurve is shown at:

http://www.astro.ku.dk/~brian_j/grb/grb050801.769/ "