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A new optical Nova in M31

ATel #1146; V. Burwitz (Max-Planck-Institut fuer extraterrestrische Physik, MPE & Observatori Astronomic de Mallorca, OAM), D. Hatzidimitriou (Department of Physics, University of Crete, UoC), A. Stefanescu (MPE), H. Steinle (MPE), W. Pietsch (MPE), A. Manousakis (UoC), P. Reig (UoC), G. Papamastorakis (UoC), S. Cikota (Observatorio Astronomico de La Sagra, OLS), A. Cikota (OLS), S. Sanchez (OAM)
on 19 Jul 2007; 15:06 UT
Credential Certification: Vadim Burwitz (burwitz@mpe.mpg.de)

Subjects: Optical, Nova

Referred to by ATel #: 1149, 1152, 1153, 1157, 1186

We report the discovery of a optical nova in M31 on four consecutive dithered R filter CCD images obtained on (2007 July 19.00741, 19.00890, 19.01041, 19.01193, with corresponding R magnitudes of 18.8, 18.7, 18.8, 18.5) obtained at the 1.3m Ritchey Chretien f/7.5 telescope at Skinakas Observatory, Crete, Greece, using an Andor DZ436-BV CCD Camera (with a Marconi 2k x 2k chip with 13.5µm sq. pixels). It was also detected on 3 Halpha images, the stacked image (2007 July 19.06966) yields a corresponding Halpha magnitude 18.3 using the method described in ATEL#1141. The position obtained for the nova candidate is RA(2000) = 00h 43m 03.29s , Dec(2000) = +41° 14' 52.94" with an accuracy of 0.1". A stacked image from 2007 July 18.01440 shows no object at the position of the nova candidate brighter than the limiting R magnitude of ~20.5. All magnitudes given are from a photometric solution using R magnitudes of the Massey M31 catalog.
The nova also appears at R=18.5(UCAC) on 2007 07 19.09367 in stacked unfiltered images (32 x 30sec) obtained with the 0.35m f/2 reflector and an SBIG ST-10 CCD Camera (with a Kodak 2k x 1.5k chip with 6.8µm sq. pixels) of the Observatorio Astronomico de La Sagra, Spain.