[vsnet-alert 15655] Re: QZ Lib observations - moonlight interference - fainter than observations??

[Boris Gaensicke]

Hi Gordon,

I feared it might get tough with this faint target... yes, any limits
are also helpful.

Best wishes,

Boris


On 25 April 2013 17:07, Gordon Myers <gordonmyers at hotmail.com> wrote:

> 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
>
>
> ----------------------------------------------------------------------------
> -------------------------
> 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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