[vsnet-outburst 4908] RE: [vsnet-campaign-dn 3151] BZ UMa outburst, recent data

["Tonny Vanmunster" <Tonny.Vanmunster@cbabelgium.com>]

Dear colleagues,

Last night, that is December 19/20, 2002, I obtained unfiltered CCD images
of BZ UMa at CBA Belgium Observatory (0.35-m f/6.3 SCT with ST-7 CCD) for
about 5.05 hours, under relatively poor conditions (hazy skies with strong
moonlight). The light curve seems rather flat to me, although I don't
exclude the presence of small oscillations.

I have posted the BZ UMa light curve on my web site.

For those of you interested, my discovery image of supernova 2002jy is also
online now.

Best regards,
Tonny Vanmunster
CBA Belgium Observatory
email : Tonny.Vanmunster@cbabelgium.com
website : www.cbabelgium.com


-----Original Message-----
From: owner-vsnet-campaign-dn@ooruri.kusastro.kyoto-u.ac.jp
[mailto:owner-vsnet-campaign-dn@ooruri.kusastro.kyoto-u.ac.jp]On Behalf
Of Taichi Kato
Sent: Thursday, December 19, 2002 8:06 AM
To: vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp;
vsnet-campaign-dn@ooruri.kusastro.kyoto-u.ac.jp;
vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp
Subject: [vsnet-campaign-dn 3151] BZ UMa outburst, recent data


BZ UMa outburst, recent data

   As reported by Eddy Muyllaert, the unusual dwarf nova BZ UMa is
undergoing
its relatively rare outburst (the last confirmed one in 2001 May).
This object is reported to have a short orbital period (below the period
gap), which may imply the SU UMa-type nature.  However, no definte
superoutbursts have been observed.  The object may be related to another
below-the-gap object HT Cam (Ishioka et al. 2002, PASJ 54, 581), which
is confirmed to be an intermediate polar (IP).  Although no definite
pulse period has been established, BZ UMa has been reported to show
quasi-periodic oscillations (QPOs) in outburst (Kato 1999, IBVS 4768),
which may related to optical pulses seen in HT Cam.

   Time-resolved photometry of the present outburst is strongly encouraged.

  YYYYMMDD(UT)   mag  observer
  20021129.866  <140  (Eddy Muyllaert)
  20021201.885  <140  (Eddy Muyllaert)
  20021203.225  <140  (Eddy Muyllaert)
  20021203.370  <153  (Mike Simonsen)
  20021204.958  <154  (Gary Poyner)
  20021209.231  <140  (Eddy Muyllaert)
  20021209.856  <140  (Eddy Muyllaert)
  20021210.024   159  (Gary Poyner)
  20021210.094  <148  (Pavol A. Dubovsky)
  20021210.434  <140  (Mike Simonsen)
  20021210.856  <140  (Eddy Muyllaert)
  20021211.230  <140  (Eddy Muyllaert)
  20021212.164  <148  (Pavol A. Dubovsky)
  20021212.316  <148  (Mike Simonsen)
  20021218.233  <137  (Eddy Muyllaert)
  20021219.257   124  (Eddy Muyllaert)

  See also:
  http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/bzuma.html
  http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/bzuma9701.html
  http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/htcam.html
  http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/preprints/HT_Cam/

Regards,
Taichi Kato
VSNET Collaboration team

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