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GCN Circular 4358

GRB 051211B: optical afterglow
2005-12-16T13:23:45Z (19 years ago)
Alberto Castro-Tirado at Astro. de Andalucia <>
M. Jel�nek, A. de Ugarte Postigo, A.J. Castro-Tirado, 
V. Casanova, D. Mart�nez, S. Guziy, S. Castillo, S. B. Pandey and J. Gorosabel (IAA-CSIC Granada):


"We have imaged a 7' x 7' region containing the INTEGRAL error box for GRB 051211B
(Mereghetti et al. GCNC 4327) with the 1.5-m OSN telescope at the Observatorio
de Sierra Nevada, starting on Dec 11.94 UT (i.e. 25 min after the GRB).
A comparison image has been taken on Dec. 15.86 UT. At the position
of the X-ray afterglow detected by Swift/XRT (La Parola et al. GCN 4338)
we detect one source that has decreased significantly in brightness
in our I-band images. Coordinates yield:  RA(2000) =  23:02:41.57,Dec(2000) =
+55:04:51.5 (+/-0.4"). This is the likely optical afterglow to GRB 051211B.
Images are posted at .
An underlying object seems to be present on the DDS-2 (infrared) which may be
a bright host galaxy, detected also on our late I-band image.
Further observations are encouraged."

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[GCN OPS NOTE(16dec05):  This circular was refortted by adding the missing line breaks.]
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