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# Sorry, I forwarded this message to a wrong address. Date: Fri, 17 Oct 2003 09:19:02 -0700 From: Arne Henden <aah@nofs.navy.mil> Berto Monard wrote: > My explorations might have led to another interesting discovery amongst > the recently released SDSS CV stars. This one could well be another UGSU > type dwarf nova. > > I cannot recall exact dates but SDSS 0407-06 (SDSS J040714.8-064425 is > the complete name) has been showing several active states since July > 2003. > I now think they were normal outbursts and it could be that I caught it > in a superoutburst now. Possibly it had another S/O around 19 July. > > SDSS 0407-06 is listed as an eclipsing cv around magnitude 17.7g in the > SDSS release. A Henden must have measured this star at least once. > > The light curves show modulations with 0.2mag amplitudes during > previous outbursts and also during the present probable superoutburst. > However the eclipses are much deeper now and reach 2.5mag as compared to > about 0.5mag during normal outbursts. The present light curve is very > reminiscent of that of V2051 Oph with those deep eclipses. > > The present brightness (outside eclipses) is around 14.2CR and was > closer to 15CR during previously observed active states. > > The star's 2000 position is depicted in its name. Some 1.5' N of it is > a suitable comparison (C) star at 13.1R (USNO-B1.0). Somewhat E of V is > a convenient K star of similar brightness to the outbursting V. > Yes, this star was highlighted in the SDSS Paper II (Szkody et al., 2003 AJ 126, 1499) with a period of 3.96hr and quiescent eclipse depth of 1.6mag (see figure 10). I have BV calibration photometry for the field (as I do for all of the SDSS CVs); since it is in outburst, I've placed that file at http://ftp.nofs.navy.mil/pub/outgoing/aah/sequence/sdss0407.dat I would be suspicious of assuming the modulations are superhumps; look at the lightcurve in our paper. Arne
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