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Optical Photometry of M31N 2008-12a After Maximum Light of the 2015 Eruption

ATel #7969; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic), M. Henze (IEEC/CSIC), M. J. Darnley (LJMU), A. W. Shafter (SDSU), M. Kato (Keio University), for a larger collaboration
on 30 Aug 2015; 14:43 UT
Credential Certification: Matt Darnley (M.J.Darnley@ljmu.ac.uk)

Subjects: Optical, Nova, Transient

Referred to by ATel #: 7974, 7976, 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) acquired with the 0.65-m telescope at Ondrejov under photometric conditions. For the measurements, 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] 
 
2015 08 30.081     B     19.33 ± 0.10         3510 
 
2015 08 29.866     V     19.10 ± 0.09         2250 
2015 08 29.933     V     19.17 ± 0.10         2880 
2015 08 30.049     V     19.30 ± 0.11         2160 
 
2015 08 29.814     R     18.65 ± 0.09         1800 
2015 08 29.932     R     18.65 ± 0.08         1350 
2015 08 30.062     R     18.79 ± 0.09         1260 
 
2015 08 29.838     I     18.50 ± 0.10         2250 
2015 08 29.943     I     18.42 ± 0.10         1800 
2015 08 30.088     I     18.80 ± 0.10         2610 
 
 
We thank K. Honkova for sharing her observing time.