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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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