Parameter uncertainties in simulated X-ray spectra

ALBACETE COLOMBO, J. F

Cordoba

Congreso; Reunion de la AAA; 2014

Univ. de Cordoba - Observatorio Astronomico de Cordoba

We estimate the uncertainty of X-ray model parameters and fluxes from a large set of simulated spectra that are representative of the X-ray emission model from faint ACIS-I Chandra source spectra. We study two different X-ray emission models: i) the absorbed thermal (APEC) model; ii) the non-thermal (POWER-LAW) model. We use Monte-Carlo (MC) simulations to construct a set of fake X-ray spectra in the low photon statistic regime, i.e. from 10 to 350 net counts in the spectra. The bulk of the MC simulations is considered not affected by background X-ray photons, and assume a very low source background fraction (bkg_frac