GCN Circular 5985
Subject
erratum : SDSS Pre-burst Observations of GRB061126
Date
2006-12-30T04:01:42Z (18 years ago)
From
Richard J. Cool at U.of AZ/Steward Obs <rcool@as.arizona.edu>
It has come to our attention that the SDSS photometry released for
the burst GRB061126 was not calibrated with the correct photometric
zero-points measured for the runs associated with these images. We
have found the problem in the scripts use to generate our GRB
followup messages and it has been corrected so this will not affect
any other future bursts. We have also verified that this problem does
not affect any other data previously released for other bursts.
The photometry previously released for GRB061126 should not be used
for photometric calibration of new data. This includes both the
photometric zero-points in the catalogs we released for this burst as
well as the photometric zero-points of the associated images.
We would like to emphasize that this error occurred due to a mistake
in our GRB pre-burst scripts and is not due to a problem with the
SDSS reductions themselves.
At the URL:
http://mizar.as.arizona.edu/grb/public/GRB061126/
We have replaced our previously released data with the official SDSS
reduction of these data (which does not suffer from the same zero-
point error). This data is suitable for photometric calibration.
At this time, we have only included an updated version of the bright
star photometry and astrometry in the file
GRB061126_sdss.calstar_v2.dat. The format for this file is identical
to that of previous releases. We have also included images for this
field from SDSS. *These images have not been corrected for the
incorrect photometric zero-points, so no photometric measurements
should me made directly from the images*.
We regret this mistake and apologize for any confusion or
inconvenience it may have caused.