6 papers · 1 filter
RX J2115--5840: confirmation of a new near-synchronous polar
Gavin Ramsay, David A. H. Buckley, Mark Cropper +1
Following the suggestion of Schwope et al that the magnetic cataclysmic variable RX J2115-5840 maybe a near-synchronous polar, we obtained optical polarimetry of this system over a…
Indirect imaging of the accretion stream in HU Aquarii
M K Harrop-Allin, Mark Cropper, P Hakala +2
We apply our technique for indirect imaging of the accretion stream to UBVR eclipse profiles of HU Aqr obtained when the system was in a high state. We perform model fits to the ec…
The GOSSIP on the MCV V347 Pav
S. B. Potter, Mark Cropper, Pasi Hakala
Modelling of the polarized cyclotron emission from magnetic cataclysmic variables (MCVs) has been a powerful technique for determining the structure of the accretion zones on the w…
Projected XMM Vision for MCVs
Cynthia H. James, Graziella Branduardi-Raymont, Mark Cropper
The XMM satellite has a scientific payload of 3 EPIC and 2 RGS instruments which provide for both imaging and non-dispersive spectroscopy as well as medium-to-high resolution dispe…
The optical counterpart of the double degenerate polar RX J1914+24
Gavin Ramsay, Mark Cropper, Keith Mason +1
Cropper et al 1998 presented X-ray observations of RX J1914+24 and claimed that the most likely interpretation of their data was that of a double degenerate Polar. Here we show the…
Continuum and line emission from post-shockc flows
Mark Cropper, Kinwah Wu, Gavin Ramsay
The post-shock flow in the accretion region of MCVs is considered to be a magnetically confined cooling flow. The X-ray spectrum from this hot plasma is emitted from a range of tem…