[vsnet-alert 11974] Re: Bright optical transient in Pegasus

[Taichi Kato]

> However, M. L. Graham et al (CBET 2275) reported that
> the object shows emission lines in H-alpha, H-beta and He II.
> Furthermore, they pointed out the existence of high excited lines
> (N III, C III and C IV).

   Although some of these lines are seen in emission during the early
stage of dwarf novae in outburst, they are more frequently seen
in WZ Sge-type dwarf novae.  Given the current brightness (and no
known past outburst record), the object may be a large-amplitude
WZ Sge-type dwarf nova undergoing a rare outburst!

   For the time being, use the designation OT_J213806.6+261957 for
reporting (the double-star nature of the GSC star would prefer
this kind of unique designation).