[vsnet-chat 663] RX J0757+6306 (Tovmassian)

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

From gag@bufadora.astrosen.unam.mx Fri Oct 10 15:46 JST 1997
Date: Thu, 9 Oct 97 23:38:25 PDT
From: Gaghik Tovmassian <gag@bufadora.astrosen.unam.mx>
To: tkato@kusastro.kyoto-u.ac.jp
Subject: Re: RX J0757.0+6306
Cc: gag@bufadora.astrosen.unam.mx
Content-Type: text
Content-Length: 1282


Dear VSNET fans,

I'm readily support Taichi's call for monitoring 
RX J0757+6306. Indeed this system has all chances to
turn into another WZ Sge system or proof to be 
the shortest period Intermediate Polar.
Briefly what we know about this system:
a. It is X-ray source, not much known about spectra or variability in X-rays.
b. Optical Spectroscopy indicates CV nature with prominent accretion disk 
	and hot spot.
c. Period derived from the S-wave radial velocity variations is
	most probably 81 minutes (+/- 5 min are not excluded).
d. The limitted photometry shows no eclipsing, high amplitude flickering
	light curves. On 4 ocassions out of 5, significant signal was recorded
	at frequency corresponding to 8.5 min  oscillations.
e. No outburst history is available at the moment.

The POSS measurments of coordinates and magnitude are as follows:
RA 07h57m01.3s  DEC +63d06m01s   2000.0   16.06 (red)

The identification chart is posted to VSNET separately.
The system was reported by Tovmassian et al. in  Proceedings of 
Symp. dedicated to 25th aniversary of Wise observatory
"Astronomical Time Series" (ed Maoz et al. 1997, Kluwer Academic 
Press) p.195
and 13th NorthAmerican Workshop on Cataclysmic Variables,
in press.

Regards, Gaghik Tovmassian
 OAN, IAUNAM, Mexico

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