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ATEL # 1590; D. Chamarro, A. Uecker, F. Yuan, M.D. Sisson, C. Akerlof, T. Mckay (U. Mich.), R. Quimby (Caltech) and J.C. Wheeler (U. Texas) on behalf of the ROTSE collaboration
on 25 Jun 2008; 18:10 UT
Password Certification: Fang Yuan (firstname.lastname@example.org)
Subjects: Optical, Nova, Supernova, Transients
We report the discovery of a supernova candidate, located at RA: 13:00:14.31 Dec: +27:57:16.4 (J2000, uncertainty <1 "), in unfiltered CCD images taken by the 0.45m ROTSE-IIIb telescope at McDonald Observatory, Texas. This transient was discovered at ~17.4 mag on Jun. 24.20 UT, and again imaged on Jun. 24.23 UT at a similar magnitude. It is not detected to a limiting magnitude of ~18.1 on Jun. 23.2 UT. It is about 339" east and 94" south from the center of Coma cluster and 44.6" west and 2.6" south from the center of the nearest galaxy seen in SDSS (2MASX J13001768+2757192).
A ROTSE-III finding chart can be found at: http://www.rotse.net/rsvp/j130014.3+275716/j130014.3+275716.jpg