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[vsnet-campaign-dn 2291] V589 Her is a UGSU type dwarf nova in 'period gap'

Date: Fri, 12 Apr 2002 00:06:31 +0200
To: "cba-news" <news@cba.phys.columbia.edu>
From: "Tonny Vanmunster" <Tonny.Vanmunster@advalvas.be>
Subject: [vsnet-campaign-dn 2291] V589 Her is a UGSU type dwarf nova in 'period gap'
Cc: "vsnet-campaign-dn" <vsnet-campaign-dn@ooruri.kusastro.kyoto-u.ac.jp>, "vsnet-alert" <vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp>
Importance: Normal
Sender: owner-vsnet-campaign-dn@ooruri.kusastro.kyoto-u.ac.jp

Dear colleagues,

I have received two good quality data sets of V589 Her time-series
photometry observations from Jerry Foote (CBA Utah).
When combining these data with my own V589 Her data, yielding a total of 841
observations, I obtain a firm superhump period of 0.0947 +/- 0.0005 d, using
the PDM technique. This turns V589 Her into a UGSU type dwarf nova inside
the so called 'period gap' !

The periodogram and phase diagram derived from the combined observations is
shown on my web site.

We are expecting a few more data sets on V589 Her.

Best regards,
Tonny Vanmunster
CBA Belgium Observatory
www.lunarpages.com/cbabelgium

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