[vsnet-newvar 1527] Re: New Bernhard variable (Brh V121) - probably X-ray source

["Ondrej Pejcha" <opejcha@volny.cz>]

> 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.

I've done one nïght of VRI photometry with 40cm telescope at
Brno observatory. Despite light fog and full moon, I caught
a minimum. The star probably is a W UMa type binary.

The light curve can be viewed at
http://var.astro.cz/pejcha/brhv121.gif
(the flare-like event near minimum light is an instrumental
effect caused by some clouds)

Best regards,

Ondrej Pejcha



> 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_-0
3.5437
> >
> > Regards,
> >
> > Klaus Bernhard
> >
> > Klaus Bernhard
> > Kafkaweg 5
> > A-4030 LINZ
> > AUSTRIA
> >
> > kl.bernhard@aon.at
> > http://mitglied.lycos.de/klausbernhard/
> >
> >
>

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