Optical Photometry of M31N 2008-12a Near Maximum Light

ATel #7967; A. W. Shafter (SDSU), J. C. Horst (SDSU), M. J. Darnley (Liverpool, JMU), for a larger collaboration.
on 30 Aug 2015; 04:20 UT
Credential Certification: Allen W. Shafter (ashafter@mail.sdsu.edu)

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The remarkable recurrent nova in M31 with an unusually short recurrence time, M31N 2008-12a, has just been discovered to be undergoing its 8th recorded optical outburst since December 2008 (ATel #7964, ATel #7965). Here, we report additional photometric measurements of M31N 2008-12a near optical maximum of the current eruption. The data were obtained with a Loral 2048^2 CCD imager at the Cassegrain focus of the Mount Laguna Observatory's 40-inch reflector.

 
 
UT DATE              FILTER              MAGNITUDE 
  
2015 Aug 29.274        B                  18.70 +/- 0.08 
2015 Aug 29.301        B                  18.71 +/- 0.06 
2015 Aug 29.405        B                  18.71 +/- 0.06 
2015 Aug 29.511        B                  18.84 +/- 0.06 
 
2015 Aug 29.281        V                  18.65 +/- 0.05 
2015 Aug 29.420        V                  18.60 +/- 0.06 
2015 Aug 29.500        V                  18.64 +/- 0.04 
 
2015 Aug 29.238        R                  18.45 +/- 0.04 
2015 Aug 29.266        R                  18.42 +/- 0.04 
2015 Aug 29.381        R                  18.40 +/- 0.03 
2015 Aug 29.479        R                  18.35 +/- 0.03 
 
2015 Aug 29.288        I                  18.84 +/- 0.05 
2015 Aug 29.315        I                  18.76 +/- 0.05 
2015 Aug 29.393        I                  18.74 +/- 0.06 
2015 Aug 29.489        I                  18.79 +/- 0.06 
 

We thank Brian W. Shafter (PHHS) for assistance with the data reduction. This work has been supported in part by NSF grant AST-1009566.