[vsnet-alert 16454] Re: (cba:chat) Next HST observations: BB Ari

[Gordon Myers]

I was able to get 6 observations in the past six hours - all between 18.3 -
18.5 with V filter.

Gordon

-----Original Message-----
From: cba-chat-bounces at cbastro.org [mailto:cba-chat-bounces at cbastro.org] On
Behalf Of Joe Ulowetz
Sent: Tuesday, September 24, 2013 7:58 PM
To: cba-chat at cbastro.org
Cc: Elizabeth Waagen; Roger Pickard;
vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp; Gary Poyner; Arto Oksanen; Stuart
P Littlefair; Michael J. Cook; Diego Rodriguez; Arne Henden; Mike Simonsen;
Joe Patterson; noc_observatory at yahoo.com; Fritz Osell; David Boyd; Bart
Staels; pepe kk
Subject: Re: (cba:chat) Next HST observations: BB Ari

I'm trying BB Ari right now, but I'm looking low though haze. I can see the
stars 147 and 152, but there is no sign of BB Ari with a 120 sec exposure.
 With 300 sec exposure I'm getting something at the right location with S/N
less than 3 and an uncalibrated magnitude of 18.8.

I'll try later when it's higher, but it is definitely faint right now.

-Joe U.



On Tue, Sep 24, 2013 at 2:48 AM, Boris Gaensicke <
Boris.Gaensicke at warwick.ac.uk> wrote:

> 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
>
> ____________________________________________________________
> Center for Backyard Astrophysics (CBA) mailing lists 
> http://cbastro.org/communications/mailing-lists/
>
____________________________________________________________
Center for Backyard Astrophysics (CBA) mailing lists
http://cbastro.org/communications/mailing-lists/