Exploring the X-ray emission properties of the supernova remnant G67.7+1.8 and its central X-ray sources

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Table 2:

Spectral parameters of the best-fit model inferred from the Chandra observed spectra of G67.7+1.8.
	The Northern rim	The Southern rim
$n_{\rm H}$ (10²¹ cm^-2)	$4.1 \pm 0.9$	$\rm 5.9^{+1.2}_{-1.1}$
T (10⁶ K)	$\rm 6.6^{+0.5}_{-0.7}$	$7.0\pm0.7$
Mg	$\rm 2.6^{+0.9}_{-0.7}$	$\rm 1.7^{+1.1}_{-0.7}$
Si	$\rm 2.8^{+1.5}_{-1.2}$	$\rm 4.7^{+2.6}_{-1.7}$
S	$\rm 13.6^{+8.7}_{-6.9}$	$\rm 16.2^{+11.7}_{-7.4}$
Norm $_{\rm cie}$ (10^-4)^a	$\rm 1.4^{+0.6}_{-0.4}$	$\rm 1.0^{+0.5}_{-0.4}$
E₁ (keV)	$4.0\pm0.2$	-
$\sigma_{1}$ (keV)	$\rm0.3^{+0.2}_{-0.1}$	-
Norm $_{\rm gauss1}$ (10^-6)^b	$\rm 3.3^{+1.4}_{-1.3}$	-
E₂ (keV)	$\rm 7.3^{+3.2}_{-0.5}$	7 (fixed)
$\sigma_{2}$ (keV)	$\rm0.9^{+2.0}_{-0.3}$	$\rm 1.1^{+0.4}_{-0.3}$
Norm $_{\rm gauss2}^{b}$ (10^-5)^b	$\rm 2.9^{+12.7}_{-1.4}$	$1.4\pm0.5$
$\chi^{2}$	25.41	31.37
d.o.f.	29	23

^a The normalization of CIE model is expressed as $(10^{-14}/4\pi D^{2})\int N_{\rm e}N_{\rm H}{\rm d}V$ where D is the source distance in cm and $N_{\rm e}$ and $N_{\rm H}$ are the post-shock electron and hydrogen densities in cm^-3; ^b the normalization of the Gaussian model is in unit of photon cm^-2 s^-1.

Source LaTeX | All tables | In the text

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