A new X-ray look into four old pulsars | Astronomy & Astrophysics (A&A)

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Table 6

Spectral parameters of PSR B1133+16.

Model	N_H	Γ	PL Norm	kT		E₁	σ₁	/d.o.f.
	10²⁰ cm⁻²		^a	keV	km	keV	keV
PL (E > 0.5 keV)		3.2 ± 0.4		…	…	…	…	0.81/17
PL (E > 0.5 keV)	1.5^c	2.8 ± 0.1	2.9 ± 0.1	…	…	…	…	0.82/18
PL^d	1.5^c	2.36 ± 0.08	2.60 ± 0.15	…	…	…	…	1.925/17
PL+2L^d	< 2.5	2.8 ± 0.2		…	…	0.221 ± 0.006		0.80/12
PL+2L^d	1.5^c	2.9 ± 0.2	2.9 ± 0.2	…	…	0.222 ± 0.006		0.78/13
PL+2L	1.5^c	2.9 ± 0.1	2.90 ± 0.15	…	…	0.225 ± 0.006		1.10/24
PL+BB+1L^d				0.045 ± 0.010	< 70			0.83/11
PL+2L unpulsed^d	1.5^c	2.9 ± 0.2	2.1 ± 0.3	…	…	0.222^c	0.015^c	0.58/5
PL+2L pulsed^d	1.5^c		0.8 ± 0.3	…	…	0.222^c	0.015^c	0.44/5
PL pulsed^d	1.5^c		0.8 ± 0.2	…	…	…	…	0.22/5

Notes. Joint fits of pn + MOS spectra. Errors at 1σ. ^(a) Normalization of the power law at 1 keV in units of 10⁻⁶ photons cm⁻² s⁻¹ keV⁻¹. ^(b) With an assumed distance of 0.35 kpc. ^(c) Fixed value. ^(d)pn spectrum only.

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