GCN Circular 5985
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.