[vsnet-ip 105] Oscillations in NSV02872

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

Oscillations in NSV02872

   According to V. P. Kozhevnikov (A&A 398, 267, 2003), the (at least once)
suspected cataclysmic variable, NSV02872, is found to show a 87.65-min
periodicity.  From the presence of a K-type stellar spectrum, Kozhevnikov
suggested a possibility of an intermediate polar (the present list selection
is based on this possibility; may be modified in future).

   Although not referred to in this article, the potentially unusual nature
of this object has been pointed out in VSNET.  Attached are the messages:

[vsnet-chat 3107 (2000)]

NSV02872

   NSV02872 was originally discovered as a possible UG-type variable.
Recent studies have shown the candidate is a late-type star, which seems
to preclude the UG-type variability.  However, I have noticed the following
ROSAT source close to the variable's position.

   061408.2 +453029 (2000.0) 1RXS-F_J061408.3+453030 0.033 0.54 0.64

   This possible association may suggest that the existence of the true
dwarf nova (or some eruptive variable) hidden in the glare of a red star.
This variable should deserve further attention.

Regards,
Taichi Kato

[vsnet-chat 3112 (2000)]

Re: [vsnet-chat 3107] NSV02872

   According to Zinner (1931) Astron. Nach. 246, 17, a period of 289 d
is suggested.  The object was sometimes observed "anomalously bright"
at mag 11.

=== old information ===

[vsnet-obs 1222, Tonny Vanmunster]

I just read an article on CV's in which two interesting objects
are mentioned : NSV 02872 and NSV 00786, both of which are listed
as possible UG's, well within the range of moderate telescopes.

NSV 02872 is located at : R.A.= 06h14m10.6s
                          Decl.= +45d30'12"  (J2000.0)
          Mag range : 11.2 - 14.5p

[vsnet-obs 1226, Taichi Kato]
   Concerning NSV 02872, I have once checked its discovery report and
found it a red object (also coincides with an IRAS PSC source).
This variable is probably not a CV, just like HN Cyg, UY Vul etc.

Regards,
Taichi Kato

===

   This object apparently deserves more intensive attention, including
time-series photometry as done by Kozhevnikov, monitoring for a high-amplitude
outburst as suggested by Zinner, and high angular resolution imaging to
search for a companion.  Recent visual monitoring has been mostly done
by Timo Kinnunen.  Contibutions from other observers are also highly
welcomed!

Regards,
Taichi Kato
VSNET Collaboration team

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