INTEGRAL hard X-ray spectra of the cosmic X-ray background and Galactic ridge emission

Free Access

Table 3:

Spectral fit parameters for the CXB, the GRXE and the Earth emission.
Spectra (model^a)	$\Gamma_1$ ^b	N₁^c	$E_{{\rm0}}$ ^d	$\Gamma_2$ ^b	N₂^c	$\chi_{{\rm red}}^2$
CXB (bknpow)	1.68	15.2	28.7	2.42	-	0.51
CXB (cutoff)^e	1.95^f	44.1	127	-	-	0.85
GRXE (cutoff)	0.0^f	0.43	8.83	1.55^f	0.82	0.25
GRXE (bremss)^e	-	13.9	14.7	1.55^f	0.79	0.34
Earth (bknpow)	0.37	0.050	49.4	1.78	-	0.05

Notes. ^(a) Model is either a broken powerlaw (bknpow), a cutoff powerlaw (cutoff) or bremsstrahlung (bremss), with or without an extra powerlaw. ^(b) Photon index of low- (1) or high-energy (2) powerlaw. ^(c) Normalization at 1 keV in ph cm^-2 s^-1 keV^-1 sr^-1. ^(d) Characteristic energy in keV. Either the break energy (bknpow), the cut-off energy (cutoff) or the kT energy (bremss). ^(e) The more physical model. ^(f) Fixed parameter value.

Source LaTeX | All tables | In the text

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.