[vsnet-grb-info 3550] GRB 060801: optical observations at Hanle and
Calar Alto
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Wed Aug 2 07:08:12 JST 2006
TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 5384
SUBJECT: GRB 060801: optical observations at Hanle and Calar Alto
DATE: 06/08/01 22:06:47 GMT
FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia <ajct at iaa.es>
A. J. Castro-Tirado (IAA-CSIC Granada), G. C. Anupama,
S. Srividya, Ramya (IIAP-RES Bangalore), A. de Ugarte Postigo
(IAA-CSIC), S. Sanchez, L. Montoya (CAHA Almeria), A. Castillo,
J. F. Muñoz-Mateos (Univ. Complutense Madrid),
M. Jelínek and J. Gorosabel (IAA-CSIC),
report:
"Following the detection by SWIFT of the short GRB 060801
(Racusin et al. GCNC 5378, Sato et al. GCN 5381), we have
taken R-band frames at the 2.0m Hanle telescope in India
(+HFOSC) starting on Aug 1.75 UT. Additional BVR-band frames
have been taken with the auxiliary port camera at the 3.5m
telescope at the German-Spanish Calar Alto Observatory in
south Spain, starting on Aug 1.935 UT. Near the position of
the X-ray afterglow (Racusin et al. GCN 5382), we detect two
faint optical sources in the R-band images:
source A: 14 12 01.8 +16 59 00.5
source B: 14 12 01.3 +16 58 54.0
with 1" accuracy (for the time being).
source A is at the edge of the XRT error box and brighter than
source B and it seems to be constant in brightness over the time
interval of our observations. Source B is consistent with the
XRT error box and there is marginal evidence that source B has
declined in brightness, with R = 22.5 +/- 0.5 (preliminary) in the
3.5m CAHA images. Further analysis is in progress."
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