An X-ray spectral survey of the disc of M 31 with XMM-Newton

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Volume 495 / No 3 (March I 2009)

A&A, 495 3 (2009) 733-741

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Table 2:

Best fit parameters for power law models applied to the summed spectra of the faint sources in each of the disc fields. We show the total number of faint sources in each field, the power law photon index, $\Gamma$ , $\chi ^2/$ d.o.f. and for which camera this fit was found. The absorption was fixed to $0.10 \times 10^{22}$ H atom cm^-2 for each field. The bracketed numbers are the error in the last significant figure. Where we quote two conversion factors, the first is for the pn camera and the second for the MOS. Errors are unavailable for the best fit power law index to South 1 as the $\chi ^2/$ d.o.f. is >2.
Field	Number of	$\Gamma$	$\chi ^2/$ d.o.f.	Camera(s) used	Conversion factor
	faint sources				erg s^-1/counts s^-1
North 3	19	2.8(13)	161/122	pn/MOS	$5.71\times10^{38}$ / $9.33\times10^{38}$
North 2	32	1.5(4)	39/38	pn/MOS	$3.58\times10^{38}$ / $7.82\times10^{38}$
North 1	11	1.00(15)	24/16	MOS	$5.73\times10^{38}$
South 1	16	1.3(-)	450/120	pn	$4.75\times10^{38}$
South 2	17	1.3(4)	56/46	pn	$4.54\times10^{38}$

Source LaTeX | All tables | In the text

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