(cba:news) New DN/AM Her star in soft X-ray outburst?

Joe Patterson jop at astro.columbia.edu
Sat Jul 17 17:56:07 EDT 2010

Southern observers may want to take a crack at this.  It's kind of 
off-season, but this could be a very important object, especially if it 
turns out to be a dwarf nova.  It's at 16th mag in quiescence 
(presumably), so could be much brighter now.

And speaking of southern objects, it's time to end the GW Lib campaign. 
We've fully answered the questions we set:
* Are there rapid pulsations?  No.
* Is the 4.2 hour signal coherent?  No.
* Is the 4.2 hour signal persistent?  Yes.
* Have we learned what the 4.2 hour signal is?  No.
* Is there an orbital signal?  No.

That's good enough, and we'll have a paper on this coverage, as well as 
the 2008 coverage (when there *was* a pulsation) and the 2007 outburst,
ready in about a month.

A good time to start on some of the other stars we're promoting!


From: Jules Halpern <jules at astro.columbia.edu>
To: jop at astro.columbia.edu
Subject: New AM Her star in Swift XRT and UVOT ?

In case you're interested, there is a very soft X-ray outburst
going on, coinciding with a UV bright star at

(J2000) 11 51 13.06 -62 37 29

It's about R=16 on the DSS.
Seems like this could be an AM Her star.
It was originally found in XMM data on July 7.
Maybe some southern observers would be interested.


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