Very Fast Fading of the Recurrent Nova M31N 2008-12a during the Most Recent Eruption
ATel #6546; K. Hornoch (Astronomical Institute, Ondrejov, Czech Republic), H. Kucakova, M. Wolf (Astronomical Institute, Charles U., Prague, Czech Republic)
on 6 Oct 2014; 14:37 UT
Credential Certification: Martin Henze (martin.henze@sciops.esa.int)
Subjects: Optical, Nova, Transient
We report multicolor photometry of the most recent outburst of the recurrent
nova M31N 2008-12a (ATel #6527, #6532, #6535, #6537, #6540, #6543) acquired
with the 0.65-m telescope at Ondrejov. The observations obtained during 3 nights
gave the following magnitudes:
Date UT Band Mag
2014 10 03.738 R 18.24 ± 0.10
2014 10 03.750 I 18.24 ± 0.11
2014 10 03.807 R 18.27 ± 0.09
2014 10 03.815 V 18.52 ± 0.10
2014 10 03.822 B 18.65 ± 0.15
2014 10 03.915 R 18.32 ± 0.08
2014 10 04.083 R 18.38 ± 0.07
2014 10 04.169 R 18.42 ± 0.10
2014 10 04.929 R 19.4 ± 0.2
2014 10 05.935 R 20.2 ± 0.3
2014 10 06.161 R 20.1 ± 0.3
The observed colors of the nova are in very good agreement with the magnitudes
published in ATel #
6543.
Using results of our R-band photometry together with Sloan r' and R-band magnitudes
published in ATel #
6535 and #
6543 we derived a decline time t2(R) = 2.7 ± 0.5 days,
which is an even faster fading than the object had in the previous eruptions,
see
Darnley et al. (2014).
In our analysis, we presume a maximum magnitude R = 18.2 and no re-brightening on the decline
branch, i.e. similar lightcurve properties as during the previous outbursts,
see
Darnley et al. (2014).
