GCN Circular 9051
Subject
GRB090323: Optical observations from NOT
Date
2009-03-29T20:21:03Z (15 years ago)
From
Antonio Deugarte at IAA-CSIC <deugarte@iaa.es>
A. de Ugarte Postigo (ESO), D. Xu, D. Malesani, J. Hjorth,
J.P.U. Fynbo (DARK/NBI), P. Jakobsson (Univ. of Iceland),
A. Adamo, G. Micheva (Stockholm Univ.) on behalf of a larger collaboration
report:
We have observed the field of GRB 090323 (Ohno et al. GCN 9021)
with the 2.5m NOT telescope (+ALFOSC) at Roque de los Muchachos
Observatory (Spain). The mean epoch of our observations is March
29.323 UT (6.327 days after the burst). The afterglow (Kennea et
al. GCN 9024, Updike et al. GCN 9026) is clearly detected in the
6x300s combined exposure with R=22.80+/-0.06. As photometric
reference we used the object indicated by Kann et al. (GCN 9033).
Our measurement is consistent with the absence of a light curve
steepening, as noted one day earlier by Kann et al. (GCN 9041).
A lightcurve composed of GCN data together with our observation
shows a possible flattening during the last 3 days.
Further observations are foreseen.
[GCN OPS NOTE(29mar09): Per author's request, GM was added
to the author list.]