Abstract
Detailed simulations have been made of the search for clusters of galaxies during the ROSAT all-sky x-ray survey (0.1–2 keV). The simulations use a conservative estimate of the cluster luminosity function to create an x-ray catalog specifying cluster position, redshift, flux, temperature and angular extent. This is used in combination with realistic models of the ROSAT scanning motion and of the background due to particles, cosmic x-rays and scattered solar x-rays, to build a simulated ROSAT data base. The data base has been subjected to the ROSAT source search algorithms and the results analyzed. Two cases were considered, a 2-degree wide great circle strip representing the general survey, and a region within 10 degrees of the ecliptic pole, where the exposure is unusually high. We present estimates of the minimum number of clusters to be detected, the fraction recognized as extended x-ray sources, and the minimum detectable energy flux from clusters during the survey.
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Cruddace, R.G., Hasinger, G., Truemper, J. et al. Simulated ROSAT observations of clusters of galaxies. Exp Astron 1, 365–388 (1990). https://doi.org/10.1007/BF00426719
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DOI: https://doi.org/10.1007/BF00426719