Optical Photometric Observations of M31N 2008-12a: Pre- and post-maximum of the 2023 eruption
ATel #16386; H. Naito, Y. Sano (Nayoro Observatory), K. Matsumoto (Osaka Kyoiku University), H. Maehara, A. Arai (NAOJ), K. Itagaki (Itagaki Observatory), M. Kato (Keio University), S. Kiyota (VSOLJ), K. Nishiyama, F. Kabashima (Miyaki-Argenteus Observatory), H. Saito (Hokkaido University), K. Taguchi (Kyoto University), A. Tajitsu (NAOJ), F. Watanabe (Nayoro Observatory), for a larger collaboration
on 19 Dec 2023; 06:57 UT
Credential Certification: Hiroyuki Maehara (hiroyuki.maehara@nao.ac.jp)
Subjects: Optical, Cataclysmic Variable, Nova, Transient, Variables
We report additional multicolor photometry of the 2023 eruption of the remarkable recurrent nova M31N 2008-12a (ATels #16361, #16362, #16364, #16365, #16367, #16370, #16382, also see Darnley et al. 2014, 2015, 2016 and Henze et al. 2014, 2015a, 2015b, 2018, 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
2023 Dec 4.378 600sec (300sec x 2) Ic > 18.9 Osaka Kyoiku University, Japan (*1)
2023 Dec 6.511 300sec Rc 18.72 +/- 0.08 Nayoro Observatory, Japan (*2)
2023 Dec 6.516 300sec V 18.96 +/- 0.08 Nayoro Observatory, Japan (*2)
2023 Dec 6.520 300sec B 19.29 +/- 0.10 Nayoro Observatory, Japan (*2)
2023 Dec 6.524 300sec Ic 18.90 +/- 0.16 Nayoro Observatory, Japan (*2)
2023 Dec 7.451 900sec (300sec x 3) Ic >19.1 Osaka Kyoiku University, Japan (*1)
2023 Dec 7.462 900sec (300sec x 3) Rc > 19.0 Osaka Kyoiku University, Japan (*1)
2023 Dec 8.360 2400sec (300sec x 8) Rc 20.6 +/- 0.2 Nayoro Observatory, Japan (*2)
2023 Dec 8.426 3000sec (300sec x 10) V 21.2 +/- 0.3 Nayoro Observatory, Japan (*2)
2023 Dec 8.415 1350sec (90sec x 15) Ic > 19.3 Nayoro, Hokkaido, Japan (*3)
2023 Dec 9.516 3000sec (300sec x 10) Rc 21.0 +/- 0.4 Nayoro Observatory, Japan (*2)
Telescopes and instruments:
1. 0.51-m f/12 + Andor DW936N-BV
2. 1.6-m Pirka telescope + MSI (Watanabe et al. 2012)
3. 0.36-m f/11 + FLI-ML1001 CCD
