GCN Circular 9256
Subject
GRB 090426: inspection of SDSS images
Date
2009-04-26T15:42:35Z (15 years ago)
From
Paolo D'Avanzo at INAF-OAB <paolo.davanzo@brera.inaf.it>
P. D'Avanzo (INAF-OAB/Univ. Bicocca), E. Palazzi (IASF-Bo), C. C. Thoene
(INAF-OAB), E. Maiorano (IASF-Bo), G. Chincarini (Univ. Bicocca). L.A.
Antonelli, S. Piranomonte (INAF-OAR) report, on behalf of the CIBO
collaboration:
Inspection of archival Sloan Digital Sky Survey images reveals no object
near the position of the optical afterglow (Cummings et al GCN 9254, Xin
et GCN 9255) of GRB 090426 down to the SDSS magnitude limits. The
nearest object is a faint (and apparently extended) source located at
the following position (J2000) :
RA = 12:36:19.49
DEC = +32:59:05.5
which is about 18" away from the optical afterglow position provided by
Cummings et al (GCN 9254). According to the SDSS this object have r =
19.71 � 0.04 and a photo-z of 0.3. At this redshift the angular
separation corresponds to about 80 kpc. Given the large offsets, this
object is unlikely to be related with GRB 090426.