WX Cet outburst
Observations: 10, 11, 12, 13 Dec 2004
11 Dec 2004
Updated: 12, 13, 14 Dec 2004
Revised: 15 January 2005
On Dec 10, 2004 I discovered the UG dwarf nova WX Cet as being
unusually bright. Light curves follow.
Actually, this is a rediscovery: see the AAVSO-discussion group, P.
Schmeer, 6 Dec 2004.
The observations were carried out with a 203 mm SC telescope fitted with
a SBIG ST7E camera (KAF401E CCD) and a Clear filter. 521 images were obtained
in 4observing sessions on 10, 11, 12, 13 December 2004. Each exposure
is 1-minute long.
For the differential photometry, the comparison star is LONEOS WX Cet
1 with an assumed unfiltered magnitude of 10.1. The check star is LONEOS
WX_CET with a measured average magnitude of 11.358 and a standard deviation
The light curves:
Red: WX Cet; Green: check star. The error bars are +/- the 1-sigma
statistical uncertainties. The magnitudes of the check star are shifted
by +1 magnitude.
At the end of the session, WX Cet was very low over the horizon (air mass
The average magnitude of WX Cet is 12.080.
The average magnitude of WX Cet is 12.205.
The magnitudes of the check star are shifted by +1.2 magnitude.
The average magnitude of WX Cet is 12.345.
The peak in the check star at 353.221 is due to a cosmic. The magnitudes
are shifted by +1.3 magnitude.
The average magnitude of WX Cet is 12.513.
The light curves show 10 "humps" at:
There is also a systematic uncertainty of 80 seconds to be added.
|HJD - 2453000
Assuming they are periodic, a best fit gives the period P and the origin
P = 1.522 h
t0 = 2,453,350.373 HJD
and the O - C diagram:
The period P = 1.52 h is significantly different from the period of 1.27
h referenced in Warner (2003).
B. Warner (2003) Cataclysmic Variable Stars, Cambridge University Press
Telescope and camera configuration.
Computer and software configuration.
Data submitted to the CBA by T. Krajci (CBA New Mexico).