[vsnet-alert 24865] Re: MASTER OT J004527.52+503213.8 outburst

[Vitaly Neustroev]

Dear all,

I observed this object in November 2016, about 3 years after the
previous outburst. The V magnitude was 18.78+/-0.01, very consistent
with PS1.

Cheers,
Vitaly Neustroev

On Tue, 27 Oct 2020 at 11:22, Keisuke Isogai
<isogai at kusastro.kyoto-u.ac.jp> wrote:
>
> Dear all,
>
> >   20201022.3253  21.1:g  ZTF  Last non-detection by ZTF
> This value is taken from "difference magnitude" in the ZTF Lasair,
> but we should use "apparent magnitude" at least for ordinary dwarf
> novae having a visible counterpart. Actually, the counterpart in PS1
> is g=18.9, is brighter than the above value. The difference magnitude
> would be used for supernovae placed on the host galaxy.
>
> Best regards,
> Keisuke Isogai
>
> On 2020/10/25 3:20, Denis Denisenko d.v.denisenko at gmail.com via vsnet-alert wrote:
> > 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
>