[vsnet-alert 24858] Re: MASTER OT J004527.52+503213.8 outburst

[反保雄介]

Kyoto Univ. Obs. performed time-resolved photometry for ~ 4 hrs, and
detected superhumps.
The superhump amplitude is ~0.3 mag, and the period is 0.081(1) d.

This superhump period seems to be slightly longer than the mean superhump
period reported in Kato et al. 2014 (P = 0.08016
https://arxiv.org/abs/1406.6428), thus this object might be in Stage A.

Time-resolved observations are encouraged.

Best
Yusuke

2020年10月25日(日) 3:20 Denis Denisenko d.v.denisenko at gmail.com via vsnet-alert
<vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp>:

> The brightest dwarf nova discovered by MASTER (12.5m unfiltered on
> 2013 Sep. 17.668 UT, ATel #5399) is in bright outburst on ZTF and
> ASAS-SN images.
>
> MASTER OT J004527.52+503213.8
>   20201021.2778  <172g   ASAS-SN
>   20201022.3253  21.1:g  ZTF  Last non-detection by ZTF
>   20201022.8889  <14.3V  Eddy Muyllaert (via AAVSO)
>   20201024.3066  13.26r  ZTF  Outburst!
>   20201024.3417  13.04g  ZTF  Outburst!
>   20201024.4326  13.00g  ASAS-SN
>   20201024.4338  12.99g  ASAS-SN
>   20201024.4351  13.00g  ASAS-SN
>
> ZTF light curve (Masci et al., 2019):
> https://lasair.roe.ac.uk/object/ZTF18abtyikp/
> ASAS-SN light curve and data for last 20 days (Shappee et al.,
> Kochanek et al.):
> https://asas-sn.osu.edu/light_curves/59408ebf-2932-44c0-8164-f76430e53173
>
> The discovery outburst in September-October 2013 was followed by the
> rebrightening to 15m six days after fading to 18m. The superoutburst
> itself lasted at least 12 days (2013 Sep. 17-29). The superhump period
> was measured as 0.08115 d [vsnet-alert 16425], 0.080464 d [vsnet-alert
> 16433] and 0.07999 d [vsnet-alert 16463].
>
> Time-resolved photometry is encouraged.
>
> Discovery ATel with the links to DSS finder chart and images:
> http://www.astronomerstelegram.org/?read=5399
>
> Denis Denisenko
>


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京都大学大学院理学研究科宇宙物理学教室 M2
Kyoto University, Graduate School of Department of Astronomy, M2
反保 雄介 Yusuke TAMPO
MAIL: tampo at kusastro.kyoto-u.ac.jp

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