Optical Photometric Observations of M31N 2008-12a: Pre- and Post-maximum of the 2017 Eruption
ATel #11133; H. Naito, F. Watanabe (Nayoro Observatory), Y. Sano, K. Kuramoto (Hokkaido University), K. Itagaki (Itagaki Observatory), S. Kiyota (VSOLJ), A. Arai (Kyoto Sangyo University), H. Maehara (Kyoto University), K. Matsumoto (Osaka Kyoiku University), A. Fukui (Okayama Astrophysical Observatory, NAOJ, NINS), K. Nishiyama, F. Kabashima (Miyaki-Argenteus Observatory), M. Henze (SDSU), M. J. Darnley (LJMU), A. W. Shafter (SDSU), M. Kato (Keio University), for a larger collaboration
on 6 Jan 2018; 04:36 UT
Credential Certification: Hiroyuki Maehara (h.maehara@oao.nao.ac.jp)
Subjects: Optical, Cataclysmic Variable, Nova, Transient, Variables
We report additional multicolor photometry of the 2017 outburst of the remarkable recurrent nova
M31N 2008-12a (ATels #11116, #11117, #11118, #11121, #11124, #11125, #11126, #11130, see Darnley et al. 2014,
2015,
2016
and Henze et al.
2014,
2015a,
2015b
for comprehensive multi-wavelength light curves of previous eruptions).
The magnitudes and upper limits for the nova are given in the table below.
Date UT Exp. time Filter Magnitude Site
2017 Dec 31.384 120sec (60s x 2) none > 19.0 Itagaki Observatory (Okayama station), Japan (*1)
2018 Jan 01.4996 60sec none 18.6 Miyaki-Argenteus Observatory, Japan (*2)
2018 Jan 01.5186 60sec none 18.7 Miyaki-Argenteus Observatory, Japan
2018 Jan 01.529 360sec (60sec x 6) none 18.7 Itagaki Observatory (Okayama station), Japan
2018 Jan 02.127 5520sec (120sec x 46) L 19.14 +/- 0.09 New Mexico Skies, USA (*3)
2018 Jan 02.214 4500sec (180sec x 25) L 19.35 +/- 0.09 Sierra Remote Observatory, USA (*4)
2018 Jan 02.4014 60sec none > 19.4 Miyaki-Argenteus Observatory, Japan
2018 Jan 02.403 1800sec (30sec x 60) g 19.90 +/- 0.14 Okayama Astrophysical Observatory, Japan (*5)
2018 Jan 02.403 1800sec (30sec x 60) r 19.36 +/- 0.08 Okayama Astrophysical Observatory, Japan
2018 Jan 02.403 1800sec (30sec x 60) z 19.50 +/- 0.14 Okayama Astrophysical Observatory, Japan
2018 Jan 03.125 5400sec (180sec x 30) L 20.12 +/- 0.15 New Mexico Skies, USA
2018 Jan 03.3979 60sec none > 20.0 Miyaki-Argenteus Observatory, Japan
2018 Jan 03.507 1800sec (30sec x 60) g 20.72 +/- 0.16 Okayama Astrophysical Observatory, Japan
2018 Jan 03.507 1800sec (30sec x 60) r 20.29 +/- 0.10 Okayama Astrophysical Observatory, Japan
2018 Jan 03.507 1800sec (30sec x 60) z > 20.5 Okayama Astrophysical Observatory, Japan
Filter ``L'' magnitudes are obtained from the observations with a luminescent (IR cut) filter.
Telescopes and instruments:
1. 0.5-m f/6.8 + KAF-1001E CCD
2. 0.5-m f/6.8 + KAF-1001E CCD
3. 0.5-m f/4.5 CDK astrograph + FLI-PL11002M CCD
4. 0.61-m f/6.5 CDK astrograph + FLI-PL09000 CCD
5. 1.88-m + MuSCAT (Narita et al. 2015, Journal of Astronomical Telescopes, Instruments, and Systems, 1, 045001)
