[vsnet-alert 19530] Re: V2492 Cyg outburst

[Ulisse Munari]

This could probably be a false Gaia alert. The object is quite red
(sort of (V-I)~3) and Gaia is measuring in white light (Gaia G band),
so any comparison Gaia G versus literature V is prone to false results.

In addition, the historical lightcurve of this variable is characterized
by continuous and large variability over several times scale, from days
to years. It is at white light ~ 14 mag since last December.

Ulisse Munari


On Fri, 26 Feb 2016, Taichi Kato wrote:

> V2492 Cyg outburst
>
>   As you may be probably aware, this pre-main sequence
> star is undergoing a major outburst.
> This object underwent an outburst in 2010
> (likely an EX Lup-type object).
>
> http://gsaweb.ast.cam.ac.uk/alerts/alertsindex
>
> Gaia16aft 	2016-02-22 16:44:28 	312.85930 	44.08995 	14.08 			YSO 	2016-02-24 18:12:38 	Outburst >6mag of V2492Cyg - known eruptive star
>
>