[vsnet-alert 4877] HS Vir possible superoutburst

[Taichi Kato <tkato>]

HS Vir possible superoutburst

  The following observations indicate that the SU UMa-type dwarf nova
HS Vir is bright for these three nights.  This is a likely signature of
a superoutburst.  The last confirmed superoutburst of HS Vir occurred
in 1999 May, which started at mv=14.0, and peaked at mv=13.4.  Since
the whole development of superhumps in HS Vir has not been well established,
time-resolved photometry is still strongly encouraged.  Please go ahead
as one of the VSNET campaign targets.

  YYYYMMDD(UT)   mag  observer
  20000519.569  <148  (A. Pearce)
  20000521.489   142  (A. Pearce)
  20000522.372   143  (R. Stubbings)
  20000522.536   145  (A. Pearce)
  20000523.394   140  (R. Stubbings)

  Further information is at:

  http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/hsvir.html

  and PASP 110, 1400 (1998)
  (also http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/preprints/HS_Vir
   and  http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/preprints/HS_Vir-2)

Regards,
Taichi Kato

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