[vsnet-alert 15499] Re: (cba:chat) Next HST observation: V485 Cen

[Arto Oksanen]

Dear all,

It looks like Rod knows this star. It was fading at the rate of 0.05
mag/hr at V=15.7 during my 4 hour long time series this morning.

arto

2013/3/12 Rod Stubbings <stubbo at sympac.com.au>:
> I have recorded the last three outbursts of V485 Cen as shown below. I have
> been waiting for this one that Arto caught. If it does not get any brighter
> it won't last long going by the recent outbursts.
>
> Regards,
> Rod.
>
>
> CENV485        130117.576   150  Stu.RASNZ outburst
> CENV485        130117.627   150  Stu.RASNZ active
> CENV485        130119.612  <153  Stu.RASNZ
>
> CENV485        130204.519   152  Stu.RASNZ outburst
> CENV485        130205.555  <153  Stu.RASNZ
>
>
> CENV485        130215.557   153  Stu.RASNZ outburst
> CENV485        130216.542  <156  Stu.RASNZ
>
>
> Rod Stubbings,
> Tetoora Observatory,
> Tetoora Road,
> Vic, Australia.
> stubbo at sympac.com.au
> http://rodstubbingsobservatory.wordpress.com/
>
>
>
> ----- 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>; "Rod Stubbings" <stubbo at sympac.com.au>;
> <cba-chat at cbastro.org>; "Joe Patterson" <jop at astro.columbia.edu>
> Sent: Sunday, March 10, 2013 5:15 AM
> Subject: Next HST observation: V485 Cen
>
>
>> Dear All,
>>
>> the double feature on SDSS1035+0551 and SDSS1435+2336
>> went well - your monitoring was again crucial to make this
>> happen! Both systems contain very cool WDs, in fact, they
>> are among the ~4 coolest (non-magnetic) accreting WDs known.
>> We expected that for SDSS1035+0551, but SDSS1435+2336
>> is a bit of a surprise ... and it implies that both have very low
>> average accretion rates.
>>
>> But, no time to relax: V485 Cen is on the schedule, and needs
>> your attention,
>>
>> Mar 16, 2013 03:02:56 to 09:44:57
>>
>> This is one of the handful of extremely short-period CVs near
>> ~60min, which are *not* part of the AM CVn class - but have
>> descended a somewhat peculiar path in evolution, and now
>> accretion from the nuclear processed inner remains of a previously
>> much more massive companion star ... the hope is to get an
>> HST spectrum that is good enough to measure some chemical
>> abundances of the accreted material.
>>
>> Please keep monitoring V485 Cen until the planned HST
>> observations.
>>
>> 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
>>
>>
>>
>> -----
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>> Version: 2013.0.2904 / Virus Database: 2641/6160 - Release Date: 03/09/13
>>
>
>
>
> -----
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-- 
Arto Oksanen
arto.oksanen at jklsirius.fi
Muurame, Finland

"In a world where I feel so small, I can't stop thinking big."