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Late-time Optical Photometry of the 2015 Eruption of M31N 2008-12a

ATel #7976; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic), H. Kucakova (Astronomical Institute, Charles U., Prague, Czech Republic), R. Quimby (SDSU), A. W. Shafter (SDSU), M. Henze (IEEC/CSIC), M. J. Darnley (LJMU), M. Kato (Keio University), for a larger collaboration
on 1 Sep 2015; 15:56 UT
Credential Certification: Allen W. Shafter (ashafter@mail.sdsu.edu)

Subjects: Optical, Nova, Transient

Referred to by ATel #: 7979, 7980, 7984, 8029, 8033, 8062, 9386

We report additional multicolor photometry of the most recent outburst of the remarkable recurrent nova M31N 2008-12a (ATel #7964, #7965, #7967, #7968, #7969, #7974) acquired with the 0.65-m telescope at Ondrejov and the Mount Laguna Observatory's 40-inch reflector. For the measurements from Ondrejov, we used co-added images obtained from many single 90-s exposures to suppress the effect of high background caused by strong moonlight.

 
 
   Date UT        Band     Magnitude    Total exposure [s]   Observatory 
 
2015 08 30.976     V     20.21 ± 0.13         3600            Ondrejov 
 
2015 08 30.845     R     19.77 ± 0.12         3600            Ondrejov 
2015 08 30.976     R     19.76 ± 0.09         3600            Ondrejov 
2015 08 31.113     R     19.83 ± 0.11         3330            Ondrejov 
2015 09 01.065     R     21.02 ± 0.19         6750            Ondrejov 
 
2015 08 30.292     I     19.01 ± 0.07          600              MLO 
2015 08 30.312     I     19.00 ± 0.08          600              MLO