A redshifted blackbody spectrum.
where :
par1 = temperature kT in keV par2 = redshift K = L39/(D10) , where L39 is the source luminosity in units of 10 ergs/sec and D10 is the distance to the source in units of 10 kpc
par2 = redshift
K = L39/(D10) , where L39 is the source luminosity in units of
10 ergs/sec and D10 is the distance to the source in
units of 10 kpc