[vsnet-alert 7451] New radio-selected CV in Sextans

["Howard E. Bond" <bond@stsci.edu>]

New radio-selected CV in Sextans

During the FIRST ("Faint Images of the Radio Sky at Twenty Centimeters") 1.4 GHz
radio survey, using the Very Large Array, the radio source FIRST
J102347.6+003841 has been identified with a previously unknown 17th-mag Galactic
cataclysmic variable (CV).  Spectroscopic observations suggest that the CV is a
DQ Her- or AM Her-type magnetic CV, as are the handful of other CVs that are
known to be radio sources.  CCD photometry obtained at Kitt Peak shows rapid
flickering and slower variations with a peak-to-peak amplitude of at least 1
mag, but has not as yet revealed the orbital period.

Although the object is rather faint, further observations as well as examination
of archival materials would be useful in establishing the orbital period, and in
searching for the "high" and "low" states shown by many AM Her systems.

Full details, including a finding chart, are available in a preprint by myself,
R. L. White, R. H. Becker, and M. S. O'Brien, at
http://arXiv.org/abs/astro-ph/0208383

Howard E. Bond

--
  Howard E. Bond					      Astronomer
  Space Telescope Science Institute   Voice: +1 410-338-4718  Fax: -4596
  3700 San Martin Drive 			  E-mail: bond@stsci.edu
  Baltimore, MD 21218  USA		 Web: http://vsnet.stsci.edu/~bond

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