[vsnet-chat 3134] OV Tau

[Taichi Kato <tkato>]

OV Tau

  Another case of noteworthy CV candidate - ROSAT identification.

  OV Tau:

USNO1125.01275716 034606.260 +294114.69 (2000.0) 14.3 15.9
034606.2 +294114 (2000.0) 15.47 0.78 Henden
034606.2 +294114 (2000.0) TAUOV * UG 15.5 16.5 P - 7.5 - pec(cont+e) R0/DOW

  ROSAT:

034605.8 +294117 (2000.0) 1RXS-F_J034605.9+294118 0.035 1.00 0.43

  The identification seems to be secure.  OV Tau was originally regarded
as a dwarf nova, but was dropped from the CV list based on spectroscopy
(detached binary).  The present ROSAT identification probably cast a
new light on this problem.  The ROSAT spectrum sounds too hard for
a non-accreting white dwarf.  Is X-ray from the companion?

Regards,
Taichi Kato

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