Discovery of Four Probable Novae in M31

ATel #4096; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic), J. Vrastil (Astronomical Institute, Charles U., Prague, Czech Republic), P. Hornochova (Ondrejov)
on 5 May 2012; 16:03 UT
Credential Certification: Allen W. Shafter (aws@nova.sdsu.edu)

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We report the discovery of four probable novae in the M31 galaxy on a co-added 960-s and 1800-s R-band CCD frames taken on May 5.062 and 5.079 UT, respectively, with the 0.65-m telescope at Ondrejov. The new objects are well visible on the co-added frames as well as on individual images (with exception of the PNV J00413185+4108320, which is visible on individual images only barely), but are not present on archive images taken at Ondrejov.

Designations, positions, offsets from the M31 center, and discovery magnitudes of the new objects are summarized in the following table:

 
 
  TOCP designation    CBAT designation  R.A. (J2000)  Dec. (J2000)  Offset R.A.  Offset Dec.   R-band mag 
 
PNV J00425927+4118146  M31N 2012-05a?   00 42 59.27   +41 18 14.6    168.5" E     126.1" N   16.60 +/- 0.08 
PNV J00423272+4115373  M31N 2012-05b?   00 42 32.72   +41 15 37.3    130.8" W      31.2" S   18.1 +/- 0.15 
PNV J00423149+4126138  M31N 2012-05c?   00 42 31.49   +41 26 13.8    144.5" W     605.3" N   17.40 +/- 0.09 
PNV J00413185+4108320  M31N 2012-05d?   00 41 31.85   +41 08 32.0    817.9" W     456.5" S   18.9 +/- 0.2 
 

Finding charts of the objects are available through the link below.

Finding Charts