[vsnet-alert 15308] Next HST observations: SDSS1005+1911

Boris Gaensicke Boris.Gaensicke at warwick.ac.uk
Fri Jan 25 02:26:14 JST 2013


Dear All,

this morning, HST successfully observed SDSS0407-0644, and
we were incredibly lucky: the system was in quiescence, which
is rare for the very active star. Thanks for the excellent coverage
of the monitoring. Apart from the safety of the HST/COS
detector, it is very helpful to have a detailed light curve in
the week or two prior to the HST observations. The spectrum
shows the white dwarf, plus some additional  absorption lines that
must originate in material above the accretion disk, as has been
seen in a few other eclipsing  (i.e. high-inclination systems)...
this will be fun to analyse.

Now onto the next target, SDSS1005+1911:

Jan 31, 2013 01:17:09   to	Jan 31, 2013 06:24:00

It's a fascinating SDSS CV: the optical spectrum show
the WD and the M-dwarf companion, even though
at its orbital period (111min), the vast majority of
CVs are SU UMa type dwarf novae with bright
accretion disks. This system is  rather faint,
but it has (rare) bright outbursts, so we need to
be a bit careful.

Best wishes,

Boris

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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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