New optical nova candidate in the outer disk of M 31
ATel #1201; W. Pietsch (Max-Planck-Institut fuer extraterrestrische Physik, MPE), V. Burwitz (MPE), A. Stefanescu (MPE), D. Hatzidimitriou (Department of Physics, University of Crete, UoC), J. Pöpsel, S. Binnewies, H. Ruder (www. capella-observatory. com, Crete), G. Papamastorakis (UoC)
on 1 Sep 2007; 15:18 UT
Credential Certification: Wolfgang Pietsch (wnp@mpe.mpg.de)
We report the discovery of an optical nova candidate in the outer disk of M 31 on nine stacked R filter images (each with 60 sec exposure) and four stacked 12nm H-alpha filter images (each with 120 sec exposure)
on 2007 Aug 24.081 and 24.093 with a magnitude of 18.7 in R and 18.1 in H-alpha, respectively. The
images were obtained at the 60cm f/3 Ganymed telescope located at Skinakas Observatory, Crete, Greece, using a STL11000M CCD Camera. The object is confirmed on CCD images with the same instrument using R filter (7*60 s stacked, 18.1 mag) and H-alpha filter (4*120 s stacked, 18.2 mag)
on 2007 Aug 30.065 and 30.076, respectively. The position for the nova candidate is RA = 00h39m30.27s, Dec(2000) = +40o29'14.2" (J2000, accuracy of 0.3"), which is 36' 30" west and 46' 54" south of the core of M 31. All magnitudes given are from a photometric solution using R magnitudes
of the USNO-B1 catalogue.
No object is visible (limiting R magnitude of ~21.5) at the position of the nova candidate on either the DSS2 red image from 1989 Oct 1 or the KPNO 4m telescope
images of M 31 (Field 8) of the Local Group survey by Massey et al. (2006, AJ131, 2478) from 2000
Oct 2.
Please note that the same set-up of the Ganymed telescope and camera was also used for the observations reported in ATel #1198.
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