[vsnet-chat 432] old note on XY Psc

[Taichi Kato <tkato>]

  The following artcile was intended for publication in VSOLJ Variable Star
Bulletin -- not appeared yet -- from a floppy disk dated 1989 July 30.

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An outburst of XY Psc
Abstract: Second known outburst of XY Psc was observed on Jan.12, 1985, at
mv=15.0, supporting the dwarf nova classification.

                                                S.Fujino (Hamamatsu)

     XY Psc was discovered as an eruptive variable in the neighborhood of
a galaxy UGC729 (Pigatto 1972).  The star was at first assumed to be a
supernova, but the light curve resembled an outburst of a dwarf nova.  No
further confirming observations have been available and it was not included
in the atlas of southern dwarf novae (Vogt and Bateson 1982).  The star is
classified as UG: in GCVS4.
     Photographic and visual search for additional outbursts have been
undertaken by the members of VSOLJ.  One outburst was caught as follows.
  1985 Jan. 12.445 UT, mv=15.0 (S.Fujino, 31cm Wright-Schmidt camera, Tri-X
film with PO0 filter)
     Duration or the light curve of the outburst could not be determined
due to lack of observations.  The variable was not visible on Feb.11.
     Although details are not known, the observation supports that the object
has a recurrent nature and strengthen the dwarf nova classification.

References:
Pigatto, L., 1972, IAU Circ., Nos. 2453, 2464.
Vogt, N., and Bateson, F.M., 1982, Astron. Astrophys. Suppl. Ser. 48, 383.

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