[vsnet-alert 9233] Fw: Re: [baavss-alert] SDSSp J082409.73+493124.4

[Hiroyuki Maehara]

According to baavss-alert and CVNet, David Boyd also reported the
detection of humps.
Orbital period estimated by Boris Gaensicke is ~98min.
The single-peaked modulations seem to be superhumps and 
SDSSp J082409.73+493124.4 is a SU UMa-type star.

----- Forwarded message from David Boyd <drsboyd at dsl.pipex.com> -----
To: baavss-alert at yahoogroups.com, cvnet-outburst at yahoogroups.com,
	cba-news <cba-news at cba.phys.columbia.edu>
Cc: Boris Gaensicke <Boris.Gaensicke at warwick.ac.uk>
From: David Boyd <drsboyd at dsl.pipex.com>
Date: Fri, 2 Mar 2007 09:50:13 -0000
Subject: Re: [baavss-alert] SDSSp J082409.73+493124.4
Reply-To: baavss-alert at yahoogroups.com

I observed this SDSS CV, caught by Jeremy in outburst, for ~7hrs last night (JD161.287-161-579) and found strong single-humped periodic variation about a mean unfiltered mag of 15.6 with peak to peak amplitude 0.2 mag and period according to ANOVA of 0.0692+/-0.0020d (99.6+/-2.9min). It is listed in the SDSS I paper as mag 19.28(g*).

According to Boris Gaensicke: "we have quiescent photometry of this one - it shows a double-humped
light curve from which we deduce an orbital period ~98min."

Mike Simonsen has a chart and sequence, obtainable via the cvnet website, but note that it is drawn with S at the top not N as marked. More photometry is needed to better determine the period.

Regards,
David Boyd (BDG)


  ----- Original Message ----- 
  From: Jeremy Shears 
  To: baavss-alert at yahoogroups.com ; cvnet-outburst at yahoogroups.com 
  Sent: Wednesday, February 28, 2007 10:53 PM
  Subject: [baavss-alert] SDSSp J082409.73+493124.4



  SDSSp J082409.73+493124.4 Feb 28.944 15.7C

  Jeremy Shears (SFY)
  Cheshire, UK
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