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cataclysmic variable

Alert Notice 376: Request to monitor SDSS J151413.72+454911.9 for HST Observations [PP Boo]

April 23, 2008: Dr. Paula Szkody (University of Washington) and collaborators have requested our help in monitoring the cataclysmic variable SDSS151445 (SDSS J151413.72+454911.9) [PP Boo] for upcoming Hubble Space Telescope observations.  Dr. Szkody requests nightly monitoring of this source beginning immediately, and continuing through 2008 May 10 UT at least. A follow-up AAVSO Special Notice will be issued when the HST observing window has been set.

SDSS J151413.72+454911.9 is located at RA 15:14:13.720,Dec +45:49:11.80 (J2000)

Alert Notice 378: Request to monitor RE J1255+266 for HST Observations

May 5, 2008: Dr. Paula Szkody (University of Washington) and collaborators have requested our help in monitoring the cataclysmic variable RE J1255+266 for upcoming Hubble Space Telescope observations. Dr. Szkody requests nightly monitoring of this source beginning immediately, and continuing through 2008 May 15 UT.

RE J1255+266 is located at RA 12:55:10.80, Dec +26:42:27.0 (J2000)

Alert Notice 401: Monitoring of EX Hya and DQ Her

August 13, 2009
 

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

Alert Notice 407: Outburst of the UGWZ-type dwarf nova EG Cancri

October 12, 2009
 

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.

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