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[vsnet-obs 1251] call for observations of GD 552
- Date: Fri, 29 Sep 1995 20:14:52 +0900
- To: vsnet-obs
- From: tkato@kusastro.kyoto-u.ac.jp
- Subject: [vsnet-obs 1251] call for observations of GD 552
- Sender: owner-vsnet-obs@kusastro.kyoto-u.ac.jp
Some readers may have noticed appearance of GD552 in some VSOLJ reports.
This object is a catalysmic variable below the period gap (has not yet been
given a variable star designation probably only due to lack of noticable
outbursts).
A thourough spectroscopic study can be found in Hessman & Hopp 1990,
Astron. Astrophys. 228, 387, which gives an orbital period of 0.07134 day.
The spectrum does not differ significantly from those of quiescent SU UMa-
type dwarf novae, despite extremely strong Balmer emission lines in GD 552.
Therefore we have good reason that GD 552 is a very good candidate for
monitoring outbursts (probably first ever!). GD 552 is at mv=16.5-17 in
quiescence. Outbursts may reach well within reach of small telescopes.
GD 552 is located at:
22h 50m 39s.8 +63deg 28' 38" (J2000.0)
= object Cep 1 in Downes & Shara (1993)
Regards,
Taichi Kato