[vsnet-alert 2002] Re: (fwd) SN1998di (Schwartz)

[Taichi Kato <tkato>]

   There are only THREE helium dwarf novae.  CR Boo, V803 Cen and CP Eri.
Schwarz's discovery of "SN1998di" adds a great new specimen to this unique
subgroup of dwarf novae.  Observations are highly encouarged, are we are
happy to receive observations (e.g. to vsnet-obs or to myself, either from
the CV or SN communities) and feed back new fidings.  All of the known three
helium dwarf novae show very short-term variation (orbital period tens of
miniutes, outburst-like oscillations every sub-day to days, and superoutburst
quasi-periodically repeating with a typical time-scale of tens of days.
Continued observations by the same instrument, with which one may gain
aditional possibility of catching a supernova than by watching field CVs,
is highly encouraged.  The USNO A1.0-based (V-equivalent) VSNET chart
[vsnet-chart 66] is available at:

  http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chart/msg00066.html

  (Original image by the discoverer:
   http://vsnet2.netcom.com/~pfactors/tenagra.html)

Regards,
Taichi Kato

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp