[vsnet-alert 25829] Re: ASASSN-21gk: strange light curve

[Siegfried Vanaverbeke siegfriedvanaverbeke@gmail.com via vsnet-alert]

Your result is consistent with the ATEL spectrum.  If it is a dwarf nova,
the difference is already in the spectral type of the donor star.

Siegfried

Op wo 5 mei 2021 om 23:53 schreef <robin at threehillsobservatory.co.uk>:

> A noisy R~500 spectrum (3.5 air mass and twilight sky) 20210505 is
> consistent with a late F/early G star
>
>
> https://britastro.org/specdb/data_graph.php?obs_id=9503&std_spectra_id=p_g0v
>
>
>
>
> -----Original Message-----
> From: vsnet-alert <vsnet-alert-bounces at ooruri.kusastro.kyoto-u.ac.jp> On
> Behalf Of Taichi Kato
> Sent: 01 May 2021 01:59
> To: vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp;
> vsnet-newvar at ooruri.kusastro.kyoto-u.ac.jp
> Subject: [vsnet-alert 25781] ASASSN-21gk: strange light curve
>
> ASASSN-21gk: strange light curve
>
>    Josch Hambsch has reported observatioons.
> This object (microlensing?) has shown a very unusual light curve.  Rapid
> rise on Apr. 22, around maximum on Apr. 25, faint on Apr. 27, rapid fade on
> Apr. 29, rapid rise on Apr. 30.  Such a variation would not expected for a
> simple microlensing.
> Spectroscopy is needed.
>
>
> --
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>