[vsnet-newvar 1523] Re: New Bernhard variable (Brh V121) - probably X-ray source

[jg <jg@jgws.freeisp.co.uk>]

B-V derived from Tycho data is around 0.7.  That's about spectral type
G2 or so.  Also, as noted, this is a faint xray source.

These can often turn out to be EW stars.

Another night or so's observations may help show this as a suspect EW
from lightcurve morphology.  A few more nights of observations may well
allow a stab at a preliminary period.

Cheers

John

John Greaves


Klaus Bernhard wrote:
> 
> Dear colleagues!
> 
> I would like to send you observations of a new variable star
> (Brh V121), which I have discovered in a systematic CCD-based
> search for new variables.
> In each observing run typically 400 images are taken of several survey
> fields.
> The frames are processed automatically.
> 
> Instruments:
> CCD-camera: Starlight Xpress SX (unfiltered)
> Telescope: Celestron-8 (20 cm Schmidt-Cassegrain)
> 
> New variable star:
> New  Brh V121  19 38 22.2 -03 32 37  (J2000) 10.9-11.7 (CCD)
> 
> comments:
> Brh V121:  GSC 5149 2845
> The comparison star is GSC 5149 2931 (11.0 mag),
> which has been checked for constant brightness.
> 
> object             YYMMDD(UT)      mag(CCD)        code
> Brh V121        020627.0285        11.42                Brh.BAV
> Brh V121        020629.0285        11.62                Brh.BAV
> Brh V121        020630.0069        11.49                Brh.BAV
> Brh V121        020701.0167        11.32                Brh.BAV
> Brh V121        020701.9979        11.37                Brh.BAV
> Brh V121        020706.0243        11.59                Brh.BAV
> Brh V121        020707.9958        11.34                Brh.BAV
> Brh V121        020719.9840        11.33                Brh.BAV
> Brh V121        020720.9847        11.40                Brh.BAV
> Brh V121        020805.9410        10.91                Brh.BAV
> Brh V121        020805.9424        10.91                Brh.BAV
> Brh V121        020805.9438        10.91                Brh.BAV
> Brh V121        020805.9451        10.93                Brh.BAV
> Brh V121        020805.9465        10.92                Brh.BAV
> Brh V121        020805.9479        10.93                Brh.BAV
> Brh V121        020805.9493        10.95                Brh.BAV
> Brh V121        020814.8882        11.70                Brh.BAV
> Brh V121        020814.8885        11.73                Brh.BAV
> Brh V121        020814.8889        11.68                Brh.BAV
> Brh V121        020814.8892        11.69                Brh.BAV
> Brh V121        020814.8896        11.71                Brh.BAV
> Brh V121        020814.8899        11.70                Brh.BAV
> Brh V121        020814.8903        11.71                Brh.BAV
> Brh V121        020814.8906        11.69                Brh.BAV
> Brh V121        020814.8910        11.71                Brh.BAV
> Brh V121        020814.9722        11.70                Brh.BAV
> Brh V121        020814.9726        11.73                Brh.BAV
> Brh V121        020814.9729        11.68                Brh.BAV
> Brh V121        020814.9733        11.69                Brh.BAV
> Brh V121        020814.9736        11.71                Brh.BAV
> Brh V121        020814.9740        11.70                Brh.BAV
> Brh V121        020814.9743        11.71                Brh.BAV
> Brh V121        020814.9747        11.69                Brh.BAV
> Brh V121        020814.9750        11.71                Brh.BAV
> 
> Vizier investigations show that GSC 5149 2845
> is a possible X-ray source: 1RXS J193821.2-033245
> This star is also included in the 2MASS Point Source Catalogue.
> 
> Further photometry for this object can be found via the TASS Mk III tenxcat
> database at:
> 
> http://a188-l009.rit.edu/cgi-bin/tass_curve2.cgi?294.5926_-03.5437
> 
> Regards,
> 
> Klaus Bernhard
> 
> Klaus Bernhard
> Kafkaweg 5
> A-4030 LINZ
> AUSTRIA
> 
> kl.bernhard@aon.at
> http://mitglied.lycos.de/klausbernhard/
> 
>

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