[vsnet-alert 23360] Re: ASASSN-19lw outburst

[Denis Denisenko d.v.denisenko@gmail.com via vsnet-alert]

Gaia has also detected this outburst of ASASSN-19lw on the rise,
according to Gaia Photometric Alerts at
http://gsaweb.ast.cam.ac.uk/alerts

ASASSN-19lw = Gaia19cut
  20190703.4372  16.29G  Gaia
  20190703.5112  16.24G  Gaia
  20190703.6873  16.20G  Gaia

Here is the Gaia light curve for this object over the last five years:
http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia19cut/

It also shows the absence of outbursts in July 2016 - July 2018. But
instead of being at stanstill around 18m, the star was found near the
minimum light from 19.3 to 20.5m. There was more activity going on in
2015.

Meanwhile ASASSN-19lw has a photometric sequence (14.7-19.1 V) thanks
to Tim Crawford at AAVSO Sequence Team.
https://www.aavso.org/vsx/index.php?view=detail.top&oid=687609

Denis Denisenko

On Fri, Jul 5, 2019 at 4:06 PM Denis Denisenko wrote:

> Checking the current ASAS-SN light curve (Shappee et
> al., 2014; Kochanek et al., 2017) confirms the on-going outburst:
>
> https://asas-sn.osu.edu/light_curves/1d399fcf-9eab-4489-8399-d6781bef4ead
>
> Yet there were no outbursts detected in Feb. 2016 - Aug. 2018. It
> looks like there was a standstill then.