INFRA-RED PROPERTIES OF X-RAY SELECTED QSOS AND GALAXIES

we have made deep rosat exposures (80ksec) in a field at the sgp. optical followup first showed that many of the xray sources detected are qsos accounting for 3050% of the 1kev xray background. at fainter fluxes (s(0.52kev)3x1014 ergs cm2s1) we detect an increasing number of apparently normal galaxies. these galaxies could account for as large a fraction of the 1kev background as the qsos but the xray emission mechanism for these galaxies is currently unknown. first we are proposing to make isophot observations of 14 xray luminous sgp galaxies at 60 and 100um to detect the dust that may be present and assess the amount of star forming activity taking place to distinguish between models for the xray emission. second, we are proposing to make isophot observations of a complete xray selected sample of 16 qsos in the same field to characterise the fir properties of typical, radio quiet qsos at fainter luminosities and higher redshifts than has previously been possible. we also propose to study the (restframe) near ir emission of a subsample of high redshift qsos to test claims of an underlying power law continuum correlating near ir and xray luminosity. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]