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Optical Nova Candidate in M31

ATel #2090; A. Valcheva (SU, Sofia), E. Ovcharov (SU, Sofia), Y. Nikolov (IA, Sofia), G. Latev (SU, Sofia), A. Kostov (IA, Sofia), Ts. Georgiev (IA, Sofia), P. Nedialkov (SU, Sofia)
on 21 Jun 2009; 15:49 UT
Credential Certification: Petko Nedialkov (japet@phys.uni-sofia.bg)

Subjects: Optical, Nova

We report the discovery of a probable nova located at RA(2000) = 00h42m33.92s, Dec(2000) = +41d15'52.9", which is 117" west and 15.6" south of the center of M31. Available R-band magnitude from 3x180sec co-added CCD images taken with the 2m RCC telescope at NAO Rozhen, Bulgaria: 2009 June 21.01869 UT, 18.66+/-0.09. The nearest object at distance of 0.30 arcsec is J004233.92+411552.6 (UBVRI phot. in seven Local Group dwarfs galaxies (Massey et al. 2007)) with R-band magnitude of 21.28.

Furthermore, we report additional photometry for the nova candidate 2009-05a (see http://cfa-www.harvard.edu/iau/CBAT_M31.html ). We determined an R magnitude of 18.16+/-0.08 on 2009 June 21.01869 UT.