[vsnet-alert 24534] Re: ASASSN-20jx = ZTF20abrubfr - large-amplitude 15m object in Cygnus

[反保雄介]

Kyoto University observatory observed ASASSN-20jx on 14th August.
This transient is still present and relatively blue, so ASASSN-20jx is
likely a CV and possible WZ Sge-type dwarf nova (and not likely a flare
star).

Our 3-hour run with clear filter showed no obvious variation and thus could
be in a phase of development of early superhumps.


2020年8月14日(金) 16:20 Denis Denisenko d.v.denisenko at gmail.com via vsnet-alert
<vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp>:

> Almost simultaneous detection by ASAS-SN (Shappee et al., 2014; Kochanek et
> al., 2017) and ZTF (Masci et al., 2019).
>
> ASASSN-20jx = ZTF20abrubfr
>   20200811.4134  <20.1g  ZTF  Last non-detection
>   20200813.3009  15.25r  ZTF
>   20200813.3222  14.98g  ZTF
>   20200813.3331  15.08g  ASAS-SN
>   20200813.3344  15.12g  ASAS-SN
>   20200813.3356  15.12g  ASAS-SN
>
> ASAS-SN LC:
> https://asas-sn.osu.edu/light_curves/4c6f91d4-f73c-4120-9e70-b1b75cdbe21b
> (last 20 days)
> ZTF LC: https://lasair.roe.ac.uk/object/ZTF20abrubfr/
>
> Position: 19 23 16.00 +52 26 10.6 (from ZTF), in the north-western wing of
> Cygnus, 18.5' to the south from V1113 Cyg.
>
> Color-combined DSS finder chart:
> http://scan.sai.msu.ru/~denis/ASASSN-20jx-BRIR.jpg
>
> Quoting ZTF: "The transient is possibly associated with an r=23.85 mag
> uncertain found in the PS1 catalogue."
>
> Outburst amplitude about 8 magnitudes implies a good WZ Sge-type candidate.
>
> 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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