Kunegunda Belle, Don Hoard and Steve Howell are observing two cataclysmic variables with Spitzer during the next couple of weeks. They request ground-based light curves spanning the observation intervals so that they can identify the state each variable is in during the Spitzer visits.
1. EX HYA (12:52:24.20, -29:14:56.0, AUID 000-BBT-323)
The observations for EX Hya are scheduled for:
2009-08-18 19:25:01.1 UT 3.6micron single exposure
2009-08-18 19:26:52.9 UT 4.5micron light curve
The WZ Sge-type dwarf nova EG Cancri has been reported in outburst by Ian Miller (Swansea, Wales). He reported EG Cnc at m(CV) = 14.3 on 2009 October 12.138 (JD 2455116.638). Subsequent unfiltered time series observations by Miller reported to the AAVSO confirm EG Cnc at around magnitude 14.3; the star declined by approximately 0.1 magnitudes during the two-hour span of the time series. Observations of EG Cnc are urgently requested at this time, including visual estimates, CCD photometry, and CCD time-series observations.
June 12, 2013: Among the research options in the HST/COS CV campaign underway are observing two VY Scl stars in the low state, the only time the white dwarf is observable. OR And is now in its low state, at 18th V magnitude as of 2013 June 11 UT.
March 8, 2013: Dr. Boris Gaensicke (Warwick University) has requested observations of the currently-outbursting SU UMa-type cataclysmic variable MR UMa in preparation for and support of HST observations scheduled for the week 2013 April 4-7.
