[vsnet-alert 25173] Re: [vsnet-outburst 26355] DDE 39 light curve (likely SU UMa star)

[Tonny Vanmunster tonny.vanmunster@gmail.com via vsnet-alert]

I have observations of DDE 39 = 1RXS J040253.8+435553 from last night (Dec
29/30) obtained at CBA Extremadura Observatory, clearly showing the
superhumps. *This is a new SU UMa type dwarf nova*. However, I had a full
computer crash (motherboard) of my home PC, so I'm currently not yet able
to properly post-process my observations of this target. I hope to be
'alive' again in a day or two.

Best regards
Tonny

On Thu, Dec 31, 2020 at 12:27 AM Taichi Kato <tkato at kusastro.kyoto-u.ac.jp>
wrote:

> DDE 39 = 1RXS J040253.8+435553 light curve (likely SU UMa star)
>
> Subject: [vsnet-outburst 26351] 1RXS J040253.8+435553 outburst
>
> From: Jeremy Shears
> Sent: 30 December 2020 14:08
> To: baavss-alert at groups.io <baavss-alert at groups.io>;
> cvnet-outburst at groups.=
> io <cvnet-outburst at groups.io>;
> vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp=
>  <vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp>
> Subject: 1RXS J040253.8+435553 outburst
>
> I managed 2.5 hours of photometry on 1RXS J040253.8+435553 last night.
> Cond=
> itions were poor with bright moonlight and lying snow, then clouded out.
>
> This showed a smooth hump of amplitude ~0.4 mag , ave mag ~15.5C (see:
> http=
> s://
> britastro.org/observations/observation.php?id=3D20201230_135723_c330db3=
> 0b1fe23c3
> <http://britastro.org/observations/observation.php?id=3D20201230_135723_c330db3=0b1fe23c3>).
> Not long enough to confirm/refute as a superhump, but the tenta=
> tive period using CLEANest on Peranso ver 3 was ~0.089 d (~2.1 h).
>
> Further observations encouraged.
>
> Jeremy
>
> ===
>
> ASAS-SN data:
> https://asas-sn.osu.edu/light_curves/2ccb30a0-ba2e-4ef9-aeed-dd16ccc4b184
>
>    The 2018 Jan. outburst also appears to be a superoutburst.
>
> Recent data:
>
>   YYYYMMDD(UT)   mag  observer
>   20201226.3090 <16.204g  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
>   20201226.3103 <16.279g  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
>   20201226.3115 <16.370g  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
>   20201228.1606 17.667zr  (Zwicky Transient Facility Lasair (Masci+ 2019))
>   20201229.823  157C  (Jeremy Shears)
>   20201230.2586 15.571g  (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017))
>   20201230.801  153C  (Jeremy Shears)
>
>

-- 
Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
www.cbabelgium.com
www.peranso.com