HESS J1818–154, a new composite supernova remnant discovered in TeV gamma rays and X-rays

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Volume 562 (February 2014)

A&A, 562 (2014) A40

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Table 2

Extraction regions and spectral fitting results for the diffuse X-ray emission.

Reg.	RA	Dec	Size^a	Area^b	Γ^c	Flux (0.5–10.0 keV)^d	χ²/ndf^e
				(10^-2 deg²)		(10^-13 erg cm^-2 s^-1)

Full	18^h17^m59^s	−15°29′2′′	67, 58	2.6		7.0 ± 3.1	0.89
Core	18^h17^m56^s	−15°27′14′′	27	0.45		3.2 ± 0.8	1.1

Notes. All quoted uncertainties correspond to the 1σ confidence interval;

^(a)

dimensions of the extraction region: semi-major and minor axes for the Full region and radius for the Core region;

^(b)

effective extraction area on the detector (PN), taking excluded point sources, bad pixels/columns, and chip borders into account;

^(c)

photon index of the power-law model;

^(d)

unabsorbed integral flux;

^(e)

value of χ² divided by the number of degrees of freedom.

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