4U 1626–67 as seen by Suzaku before and after the 2008 torque reversal

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Table 1

Best broad band fit spectral parameters^a.

Observation	N _H ^b	α ^c	E _cut ^d	E _Fold ^d	E _CRF ^d*	T _BBody ^d	Flux^f	Constant	(d.o.f.)
		norm			σ _CRF ^d	norm_BB^e		factor^g

400015010	1.46(2)	0.846(9)	18.9(5)	13(1)			0.55(9)	0.85(2)	1.38(205)
(Mar 2006)		0.010(1)			3.6(6)	127 ± 13		0.8(fixed)

405044010	0.6(2)	0.981(3)	21.6(7)	15(2)	37.8(8)	0.511(8)	1.58(4)	1.21(4)	1.20(206)
(Sep 2010)		0.026(1)			4.3(6)			0.8(5)

Notes.

^(a)

(PHABS (8 GAUSSIANS+GAUSSIAN+ BBODYRAD) +POW)*HIGHECUT *GABS)*CONST.

^(b)

× 10²¹ cm^-2.

^(c)

Photon Index with normalization units in photons keV^-1 cm^-2 s^-1 at 1 keV.

^(d)

keV.

^(d*)

The values for the cyclotron line depths are 14 ± 4 and 18 ± 4 for the Mar. 2006 and Sep. 2010 observations, respectively.

^(e)

With norm_BB = /, where d₁₀ is the distance in units of 10 kpc, varying from 0.5–1.3 (assuming the 5–13 kpc distance range reported for this source).

^(f)

× 10^-9 erg cm^-2 s^-1 (0.5–100 keV), based on the XIS 03 flux calibration; XIS 03 is a combined spectrum from XIS 0 and XIS 3.

^(g)

Intercalibration factors (PIN/XIS 03 and GSO/XIS 03). The GSO/XIS 03 factor was fixed to the value obtained for the second observation since it could not be well constrained.

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