Optical follow-up light curve of the recurrent nova M31N 1990-10a during its 2016 eruption

ATel #9386; K. Hornoch (Ondrejov), M. Henze (CSIC-IEEC), H. Kucakova, K. Honkova, M. Wolf (all Charles University)
on 18 Aug 2016; 16:03 UT
Credential Certification: Martin Henze (henze@ice.cat)

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We report the optical light curve of the recurrent nova (RN) M31N 1990-10a (see ATels #9276,#9280,#9281,#9383) during the two weeks following the 2016 eruption. The data were obtained with the 0.65-m telescope at Ondrejov. The nova was fading fast after its estimated eruption date on July 26.87 UT (uncertainty of 0.82 d; see ATel #9276). The short decline time is consistent with the high white dwarf mass expected in an RN and with the behaviour of other well observed M31 RNe like M31N 1963-09c (see e.g. ATels #8238,#8243) or M31N 2008-12a (see e.g. ATels #7969,#7976 and Darnley et al. 2016). Below we list the observed magnitudes and corresponding uncertainties for the respective dates and filters.

 
Date [UT]      | Mag   | Err  | Filter 
2016-07-28.855 | 17.56 | 0.10 | R 
2016-07-28.864 | 17.84 | 0.12 | V 
2016-07-29.085 | 17.6  | 0.1  | R 
2016-07-29.888 | 17.7  | 0.1  | R 
2016-07-29.934 | 17.9  | 0.1  | R 
2016-07-30.921 | 18.0  | 0.1  | R 
2016-07-31.001 | 18.0  | 0.1  | R 
2016-08-01.934 | 18.3  | 0.2  | R 
2016-08-02.096 | 18.6  | 0.2  | R 
2016-08-04.011 | 18.5  | 0.1  | R 
2016-08-04.946 | 18.7  | 0.2  | R 
2016-08-06.933 | 19.0  | 0.2  | R 
2016-08-08.035 | 19.2  | 0.2  | R 
2016-08-08.917 | 19.6  | 0.3  | R