Catalina Sky Survey observations of GRB130505B - a UV Ceti variable?
ATel #5066; M. De Pasquale, S. Oates (MSSL/UCL), A. Drake (Caltech), D. Kocevski (NASA/GSFC/ORAU), P. D'Avanzo, A. Melandri (INAF-OAB), P. Evans (U. Leicester), F. E. Marshall (NASA/GSFC) on behalf of the Swift team
on 15 May 2013; 14:00 UT
Credential Certification: Pat Romano (romano@ifc.inaf.it)
Subjects: Optical, Transient
We have inspected images from the Catalina Sky Survey (http://nesssi.cacr.caltech.edu/catalina/20010510/105101010504100001p.html)
at the position of the suspected Galactic transient GRB130505B (Serino et al., GCN circ. 14586).
The source's location was observed 363 times between 2004-03-27 and 2013-02-17.
We find one clear detection on MJD=55204.38265, when PSF-like a source was
present with V=~18.4. The source was not present in an image taken 10 minutes
earlier, or one taken ten minutes later.
Given the colour of the SDSS source, the short outburst we detect appears completely
consistent with a UV Ceti variable. No asteroid is a good match for the source detected.
We caution that, since the outburst is only detected in
a single image, we cannot exclude the possibility that it is due to an artifact.
