[vsnet-alert 15365] AS Psc outburst

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Sat Feb 9 10:28:01 JST 2013

AS Psc outburst!

  Time-series observations are very strongly encouraged!

  YYYYMMDD(UT)   mag  observer
  20120906.150  <179C  (Eddy Muyllaert)
  20120912.160  <186C  (Eddy Muyllaert)
  20120915.190  <186C  (Eddy Muyllaert)
  20120919.171  <186C  (Eddy Muyllaert)
  20120929.087  <179C  (Eddy Muyllaert)
  20121023.133  <179C  (Eddy Muyllaert)
  20130120.923  <170C  (Eddy Muyllaert)
  20130207.919  15.50:C (Eddy Muyllaert)

IBVS 5158

   AS Psc (=S 10828) was originally discovered as an eruptive variable
reaching $B$=16.5 in 1963 in the vicinity of the galaxy M33 (Richter 1979).
Since no other outbursts were detected between 1963 and 1980 (Richter 1979),
the star was suspected to be a nova in M33.  The second outburst was
detected in 1980 (Sharov 1982), which made a long-period dwarf nova more
likely.  However, the possibility of a recurrent nova in M33 remained
(Richter 1983).  Since then, three more outbursts were detected, at least
one of which faded very quickly (Sharov 1988).  Together with the shortest
interval of 293 d between outbursts, the object is now considered to be
a dwarf nova with rather infrequent outbursts (Richter 1989).
Richter (1989) listed all the observations of five known outbursts.

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