SUMMARY OF PROPOSAL 73005
UNIVERSITY OF CENTRAL LANCASHIRE
LANCASHIRE UK PR1 2HE
Tel: (+44) (0) 1772 893570 Fax: (+44) (0) 1772 892903
Subject: CATACLYSMIC VARIABLES
VARIABILITY WITH ORBITAL PHASE OF THE LOCAL ABSORPTION IN OY CAR
ABSTRACTWe propose to obtain phase-resolved ASCA observations of the dwarf nova OY Car during quiescence. If an X-ray eclipse of the boundary layer is seen, we will use the eclipse geometry to constrain the size and location of the X-ray emission relative to the white dwarf. We will use spectral modelling to measure the local column density at different orbital phases in a search for azimuthal asymmetry of the absorbing material. We will compare the values obtained from our X-ray measurements with those deduced from the ``iron curtain'' seen in the HST UV spectra, thereby resolving the apparent discrepancies between previous non-simultaneous measurements. This proposal is Time Critical because we are requesting HST time simultaneous with the ASCA observations.
|CO-I NAME ||INSTITUTE ||COUNTRY |
|TIM NAYLOR||KEELE UNIVERSITY||UK|
| GABRIEL PRATT||UNIV. CEN. LANCS.||UK|
| KOJI MUKAI||NASA-GSFC/USRA||USA|
| JANET WOOD||KEELE UNIVERSITY||UK|
|TARGET NAME||PRI||RA||DEC||TIME||TC||OFF||GIS||SIS CNT||OBS|
|1)OY CAR|| B||151.5958||-70.2350|| 60 ks||Y||N||P||0.15000||1|
TARGET 1EPHEMERIS CENTRE: MJD 3993.053958 + 0.0631209180E. 36 HRS ELAPSED TIME ENSURES ADEQUATE BINARY PHASE COVERAGE. TIME CRITICALITY REQUIRED FOR SIMULTANEOUS WITH HST.
COORDINATED OBSERVATION: START: Jan 1,9999 at 00STOP: Jan 1,9999 at 00