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[vsnet-outburst 4070] V803 Cen (super)outburst

V803 Cen (super)outburst

   V803 Cen is undergoing a bright outburst (likely superoutburst).
The last superoutburst started on March 21, making a supercycle length
of ~70 d.  This value is quite characteristic to the "ER UMa-type"
outburst pattern of V803 Cen seen in 1998-1999.  After "standstills"
in 2000 and 2001 (IBVS 5091), the star has resumed its ER UMa-type activity.
The present observation makes the similarity between V803 Cen and CR Boo
more concrete than ever.

   A comparison between the two "helium ER UMa-stars" (CR Boo and V803 Cen)
follows.  (The data are from Kato, T., Stubbings, R.,Monard, B. and Pearce, A.,
2000, IBVS 4915; see this reference for more details).

                             V803 Cen     CR Boo
----------------------------------------------------
V-magnitude range            12.2-16.8    13.0-17.5
main photometric period (s)  1611         1490
supercycle length (d)        77           46.3
superoutburst duty cycle     0.4          0.5

  YYYYMMDD(UT)   mag  observer
  20020526.719  167CR  (Berto Monard)
  20020527.374  <134  (Rod Stubbings)
  20020528.353  <142  (Rod Stubbings)
  20020529.362   148  (Rod Stubbings)
  20020529.428   146  (Rod Stubbings)
  20020529.567   136  (Rod Stubbings)
  20020529.716   130  (Berto Monard)
  20020531.428   126  (Rod Stubbings)
  20020531.444   125  (Rod Stubbings)
  20020531.485   126  (Rod Stubbings)

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