X-ray number counts of star forming galaxies
  The behaviour of the X-ray number counts of normal galaxies at faint (-18<Log F<-15 cgs in the 0.5-2.0 keV band) fluxes is investigated. The joint use of information from radio, far infrared and X-ray surveys allows the determination of the LogN-LogS of galaxies within a factor-of-3 over the whole flux range considered. 
Piero Ranalli (1,2), Andrea Comastri (1), Giancarlo Setti (2) ((1)   INAF-Osservatorio Astronomico di Bologna; (2) Universit...