[vsnet-alert 17168] Re: IR Com outburst?

[Eddy Muyllaert]

Hi Gary, Boris,

I've had it at 17.18C on 2014 Apr 5.1222UT, so definitely the low state has
ended.

Regards,
Eddy

-----Oorspronkelijk bericht-----
Van: vsnet-alert-bounces at ooruri.kusastro.kyoto-u.ac.jp
[mailto:vsnet-alert-bounces at ooruri.kusastro.kyoto-u.ac.jp] Namens Gary
Poyner
Verzonden: maandag 7 april 2014 16:40
Aan: Boris Gaensicke
CC: Roger Pickard; cba-chat at cbastro.org;
vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp; Stuart P Littlefair; Michael J.
Cook; Diego Rodriguez; Mike Simonsen; Toloza,Odette;
noc_observatory at yahoo.com; Fritz Osell; Pala, Anna
Onderwerp: [vsnet-alert 17165] Re: IR Com outburst?

I have an unfiltered CCD measure of 17.7C on Mar 27.130 UT, indicating that
the deep low state had ended (or ending?) in late March.

I well remember the 1998 outburst - very short, almost IP type outburst
behaviour.

regards,
Gary


On 7 April 2014 08:36, Boris Gaensicke <Boris.Gaensicke at warwick.ac.uk>wrote:

> Dear All,
>
> CRTS has reported a brightening of IR Com. This short-period
> CV has been in a very long low state, which is usually only
> observed among polars, the strongly magnetic CVs. All evidence
> we have excludes a strong magnetic field on the WD in IR Com,
> which begs the question how it managed to switch off for
> more than 2 years (arXiv:1401.5055v2 <http://arxiv.org/abs/1401.5055v2>).
>
> It's history of IR Com as a dwarf nova is not terribly well
> documented, as far as I know only one outburst has been
> well studied
(2002PASJ...54...79K<http://adsabs.harvard.edu/abs/2002PASJ...54...79K>
> ).
>
> Now that IR Com seems to be awakening, it seems a good
> opportunity to give the star some more attention. If this
> current brightening is a proper outburst, time-series
> photometry would be very useful to search for superhumps
> (which were so far never detected).
>
> Best wishes,
>
> Boris Gaensicke
>
>
>
>
>


-- 
------------------------------------------------------
Gary Poyner FRAS
garypoyner at blueyonder.co.uk
http://www.variablestars.co.uk
"You can always tell a Brummie....but you can't tell him much"!