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Post Info TOPIC: WW Ceti
Blobrana


L

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RE: WW Ceti
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Title: The First Historical Standstill of WW Ceti
Authors: Mike Simonsen, Rod Stubbings

Z Cam dwarf novae are distinguished from other dwarf novae based on the appearance of so called 'standstills' in their long-term optical light curves. It has been suggested previously that WW Cet might be a Z Cam type dwarf nova, but this classification was subsequently ruled out, based on its long-term light curve behaviour. Forty years of historical data for WW Cet has shown no evidence of standstills. WW Ceti is therefore classified as a UG type dwarf nova in the General Catalogue of Variable Stars (GCVS) and the International Variable Star Index (VSX). Beginning in the 2010 observing season, WW Cet has been observed to be in a standstill, remaining more or less steady in the 12th magnitude range. Based on this first ever, historical standstill of WW Ceti, we conclude that it is indeed a bona fide member of the Z Cam class of dwarf novae.

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Blobrana


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WW Ceti was first mentioned as a variable star by Luyten (1962), who already suspected it's CV nature, which was later confirmed by Herbig (1962). Paczynski (1963) first published a light curve, but could not identify any periodic features. He was also the first to suggest the possibility that the system belongs to the subclass of the Z Cam stars. The system was included as a Z Cam star in the General Catalogue of Variable Stars (GCVS, Kukarkin et al. 1969)
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Blobrana


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The dwarf nova WW Ceti is in outburst.

Date: 24th November 2010
Magnitude:  11.1 - 16.0 V
Period:  31.2 days
Satellite orbital period: 0.17578  days
Type: UG,  Hot White Dwarf binary

Position(2000): RA=00h11m24.77s, Dec=-11° 28' 42.7"

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Blobrana


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The dwarf nova WW Ceti is in outburst.

Date: 16th November 2008
Magnitude:  9.3 - 16.8 V
Period:  31.2 days
Satellite orbital period: 0.1758 days
Type: UG,  Hot White Dwarf binary

Position(2000): RA=00h11m24.77s, Dec=-11° 28' 42.7"  

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Blobrana


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The cataclysmic variable WW Ceti is in outburst.

Date of outburst: 22nd September 2008
Magnitude: 9.3 - 16.8 V
Period between the flashes: 31.2 days
Satellite orbital period:  24 hours ?
Type: UG, Hot White Dwarf binary

Position(2000): RA=00h11m24.77s, Dec=-11°28` 42.7" 

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