The APM cluster-galaxy cross-correlation function : Constraints on Omega and galaxy bias
(1998)
The UK ROSAT Deep Survey
ASTRON NACHR 319:1-2 (1998) 51-54
Abstract:
We present a summary of the identification content of the UK ROSAT Deep Survey. The survey is based on a 115ksec PSPC observation and comprises a sample of 70 sources to a flux limit of 2 x 10(-15) ergs cm(-2) s(-1) (0.5-2 keV). At bright fluxes the survey is dominated by broad line QSOs, at intermediate fluxes it contains a number of groups and clusters of galaxies, but at faint fluxes the survey contains many galaxies with narrow optical emission lines (NELGs). The average X-ray spectrum of the NELGs is harder than that of the QSOs and similar to that of the X-ray background. The NELGs have optical spectra similar to the majority of the field galaxy population in the same redshift range and may simply be the more luminous members of the emission line field galaxy population. Based on optical line ratios and X-ray/optical ratios, the NELGs, both as a sample and within individual galaxies, appear to be a mixture of starburst galaxies and true AGN.The origin of the cosmic soft X-ray background: optical identification of an extremely deep ROSAT survey
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 295:3 (1998) 641-671
Measuring frequency response of surface-micromachined resonators
Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 3225 (1997) 32-43
The Power Spectrum of Rich Clusters of Galaxies on Large Spatial Scales
(1997)