Request to monitor SDSS074545 for HST Observations

Details Request to monitor SDSS074545 for HST Observations Request to monitor SDSS074545 for HST Observations

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aan...359....1t&link_type=abstract

AAVSO Alert Notice 359

Physics

Sdss J074531.92+453829.5, Cataclysmic Variable, Hst, Pulsating White Dwarf, Aavso International Database

Scientific paper

Dr. Paula Szkody (University of Washington) has requested our help in monitoring the cataclysmic variable SDSS074545 (SDSS J074531.92+453829.5) for Hubble Space Telescope observations scheduled for the week of October 29-November 3 UT. SDSS074545 has not previously been seen in outburst, and is being observed as part of a larger study of pulsating white dwarf primaries in cataclysmic variables. In particular, Szkody and collaborators are investigating the effects that higher temperatures and larger rotation velocities caused by accretion have on the pulsation behavior. This object is very faint at quiescence, with V=19.1. AAVSO observations are requested to ensure that the object is indeed faint when observed with HST, as it could damage the instrument if it were to go into outburst. AAVSO observations will be used to make a "go"/"no go" decision when the observing window opens, and will also be used in the analysis of the resulting data. Observers should monitor this object nightly during the two weeks prior to the observing window, and intensively during the 24-48 hour period during which observations will be made. In the event of an outburst, please contact the AAVSO immediately. Please submit observations to the AAVSO International Database using the name SDSS074545.

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