7 papers
GRS 1915+105: The first three months with INTEGRAL
D. C. Hannikainen, O. Vilhu, J. Rodriguez +19
GRS 1915+105 is being observed as part of an Open Time monitoring program with INTEGRAL. Three out of six observations from the monitoring program are presented here, in addition t…
Stream eclipse mapping with 'fire-flies'
C. M. Bridge, Pasi Hakala, Mark Cropper +1
We apply a new method of eclipse mapping to the light curves of eclipsing polars. The technique aims to locate the bright emission associated with the accretion stream, using a tec…
Evidence for evolving accretion disk structure in 4U 1957+115
Pasi Hakala, Panu Muhli, Guillaume Dubus
We present results of the first multicolour photometric study of 4U1957+115, one of the optically less studied low mass X-ray binaries (LMXB). Our quasi-simultaneous UBVRI observat…
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…
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…