[vsnet-grb-info 5866] GRB 080325: Early observations from OSN

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7516
SUBJECT: GRB 080325: Early observations from OSN
DATE:    08/03/25 18:33:39 GMT
FROM:    Antonio Deugarte at IAA-CSIC  <deugarte at iaa.es>

A. de Ugarte Postigo (ESO, Chile), A. Sota,
J.Gorosabel, A.J. Castro-Tirado (IAA-CSIC) report,

We have observed the field of GRB 080325  (Vetere et al.
GCN 7512) with the 1.5m OSN telescope at Sierra Nevada
Observatory (Granada, Spain) starting at 04:23:01 UT, 12.48
minutes after the burst. Inside the initial XRT error box
there is an object with coordinates R.A.: 18:31:34.13
Dec.: +36:31:19.8 (J2000 +/- 0.5"), which is also present in
the DSS, consistent with the coordinates reported by
Updike et al. (GCN 7515). Inside the refined XRT error box
(Osborne et al. GCN 7513) we do not detect any new source
down to the following 3-sigma limits (t-t0 being the mean
observing time since the GRB):

(t-t0) (min)  |  Exp. time  (s)   |  I-band limit
12.65          |  20                     |  > 19.5
14.36          | 9x20                  |  > 20.8
39.46          | 2300s                |  > 21.8

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