[vsnet-alert 16451] Re: Next HST observations: BB Ari

[Roger Pickard]

Hi Boris,

The latest observation taken at 16.26 UT with the Faulkes Telescope 
South shows it to be back to about mag 18.  (It even appeared slightly 
fainter than an image taken at 16.05).

I'll measure them properly later when I get the images as this was 
just an eyeball estimate.

Cheers,
Roger

----- Original Message ----- 
From: "Boris Gaensicke" <Boris.Gaensicke at warwick.ac.uk>
To: "Gary Poyner" <garypoyner at blueyonder.co.uk>; "Roger Pickard" 
<roger.pickard at sky.com>; "David Boyd" <davidboyd at orion.me.uk>; "Mike 
Simonsen" <mikesimonsen at aavso.org>; "Elizabeth Waagen" 
<eowaagen at aavso.org>; "Arne Henden" <arne at aavso.org>; "Arto Oksanen" 
<arto.oksanen at jklsirius.fi>; "Bart Staels" 
<staels.bart.bvba at pandora.be>; 
<vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp>; "Stuart P Littlefair" 
<s.littlefair at sheffield.ac.uk>; <cba-chat at cbastro.org>; "Joe 
Patterson" <jop at astro.columbia.edu>; "Fritz Osell" 
<fritz.osell at noc.edu>; "Diego Rodriguez" <blazares at yahoo.es>; "pepe 
kk" <chonton at yahoo.com>; "Michael J. Cook" 
<michael.cook at newcastleobservatory.ca>; <noc_observatory at yahoo.com>
Sent: Tuesday, September 24, 2013 8:48 AM
Subject: Re: Next HST observations: BB Ari


> Dear All,
>
> the last few measurements of BB Ari show it brightening by
> about a magnitude over its quiescent level.
>
> This is bad news:If this is the onset of a normal outburst, it
> will not be back in quiescence for Friday's HST observations.
>
> If at all possible, please try to get additional V-band (or
> unfiltered, if it is otherwise too faint) snapshots to monitor
> the behaviour of the star over the next few days - those
> data will be extremely important for deciding how to
> proceed.
>
> Best wishes,
>
> Boris
>
>
> ------------------------------------------------------------------------------------------------------
> For more information on this HST program, see
>
> http://deneb.astro.warwick.ac.uk/phsdaj/public_html/12870/
> http://deneb.astro.warwick.ac.uk/phsdaj/public_html/12870/Targets.html
>