[vsnet-alert 1583] CVC 164 (TU Crt - weak periodic signal)

[Tonny Vanmunster <tvanmuns@innet.be>]

BELGIAN ASTRONOMICAL SOCIETY V.V.S. -  Working Group Variable Stars
Cataclysmic Variables Circular No.164                1998, March 25
Ed.: T. Vanmunster, Walhostraat 1A, 3401 Landen, BELGIUM
     Internet: tvanmuns@innet.be                  TEL. 32-11-831504
     CVC Web Page : http://vsnet.cba.phys.columbia.edu/cvc
===================================================================

TU Crt [UG, 12.1 - ?]
=====================

CCD photometry of TU Crt, obtained on 1998, Mar 24/25 at CBA Belgium
Observatory, during a 2.3 h run, shows the existence of a very weak
periodic signal, which might be attributed to (developing) superhumps 
in this system. The period value, derived using the PDM technique, is 
0.0843 +/- 0.004 d, while the mean semi-amplitude of the signal was 
0.04 mag. Observations were made using a 0.25-m f/6.3 SCT and ST-7
CCD.

We would like to stress the need for follow-up observations, to deter-
mine if superhumps will fully grow in the next days and to establish a 
more accurate superhump period value (if the system proves to be an 
UGSU dwarf nova after all).


Tonny Vanmunster

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