[vsnet-alert 15654] QZ Lib observations - moonlight interference - fainter than observations??

[Gordon Myers]

Boris,

QZ Lib will be about 12 degrees from the full moon tonight.  Recent
observations (~18.5) have been difficult and getting to magnitude 18+ will
be tough tonight.  We probably need help from someone who's scope can handle
this situation to get additional observations...

If we can get them, do you want "fainter than" observations?  There are some
16 and 17 magnitude stars peeking through the moonlight - at least last
night?

Gordon

-----Original Message-----
From: cba-chat-bounces at cbastro.org [mailto:cba-chat-bounces at cbastro.org] On
Behalf Of Boris Gaensicke
Sent: Friday, April 19, 2013 2:12 AM
To: Gary Poyner; Roger Pickard; David Boyd; Mike Simonsen; Elizabeth Waagen;
Arne Henden; Arto Oksanen; Bart Staels;
vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp; Stuart P Littlefair;
cba-chat at cbastro.org; Joe Patterson; Fritz Osell; Gary Poyner; Roger
Pickard; David Boyd; Mike Simonsen; Elizabeth Waagen; Arne Henden; Arto
Oksanen; Bart Staels; vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp; Stuart P
Littlefair; cba-chat at cbastro.org; Joe Patterson; Fritz Osell
Cc: Diego Rodriguez; chonton at yahoo.com; Michael J. Cook; Diego Rodriguez;
chonton at yahoo.com; Michael J. Cook
Subject: Re: (cba:chat) Next HST observations: HS1055+0939 = IU Leo & QZ Lib

Dear All,

yesterday, HST observed successfully HS1055+0939=IU Leo.

Thank you very much for the very detailed monitoring that you provided -
this was extremely helpful to reassure everybody that the recent outburst
was indeed over, and the star was not up to anything else.

At a first glance, the UV spectrum suggests that the accreting white dwarf
in this long-period dwarf nova may be relatively hot, which would be
consistent with the fact that the system has relatively frequent dwarf nova
outbursts - but we will need a bit more time for a detailed analysis.

The next target is rather faint, so may need image stacking for a good
detection.

QZ-Lib                  Apr 26, 2013 14:37:44   Apr 26, 2013 21:23:30

The scheduling makes it quite tight this time for STScI to uplink the "OK"
command to HST once they receive your latest monitoring.

Apart from the usual "intense" monitoring until the HST observations, we
will need a good set of V-band snapshots on the evening of April 25th (UT)
until the early morning of the 26th (UT). Luckily, QZ Lib is well placed for
observations both from the south and the north.

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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