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[vsnet-newvar 2218] Re: New Bernhard variable (Brh V137)-bright X-ray source

Date: Wed, 24 Sep 2003 01:20:39 -0700 (PDT)
To: vsnet-newvar@ooruri.kusastro.kyoto-u.ac.jp
From: Patrick Wils <patrickwils@yahoo.com>
Subject: [vsnet-newvar 2218] Re: New Bernhard variable (Brh V137)-bright X-ray source
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> New variable star:
> new Brh V137    20 19 49.6 -12 30 38.2 (J2000) 11.0-11.6 (CCD)
>  
> comments:
> Brh V137: GSC 5749 1622 =HD 193276
> The comparison star is GSC 5749 1269 (13.5 mag),
> which has been checked for constant brightness.
> 
> John Greaves has kindly sent a comment:
> It's HD 193276, and the Michigan HD catalogue says it is F8/G0 V.
> It seems very likely to be associated with the bright xray catalogue
> source 
> 1RXS J201950.0-123037, with quite good positional agreement.
> 
> Without any lightcurve information, I'd guess at another EW star,

The ASAS3 data at
http://vsnet.astrouw.edu.pl/cgi-asas/asas_lc/201949-1230.6 indeed show
this is an EW type star, for which the following ephemeris can be
derived: JDMin = 2452897.65 + 0.41890 E.

Patrick


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