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Table 7

XRT spectroscopy of the three SFXTs in the new monitoring sample (2011−2013 data set).

Name Spectrum Mean rate NH Γ k TBB RBB Fluxa Luminosityb /d.o.f. F-testc Fig.
(2−10 keV) (2−10 keV) p
(c s-1) (1022 cm-2) (eV) (km) (10-12) (1035)
J08408 low 0.05 − − 5.6 0.078 1.7/57
low 0.05 5.5 0.076 1.18/55 4.4 × 10-5 2
very lowd 0.009 − − 0.09 0.001 1.47/194
very lowd 0.009 0.19 0.003 1.18/192 6.9 × 10-10 2
J16328 low 0.08 − − 16 1.4 0.84/110 3
very lowe 0.007 − − 1.1 0.06 1.66/242
very low 0.007 0.95 0.06 1.12/240 3.1 × 10-21 3
J16465 high >0.25 − − 43 9.7 1.02/108
high >0.25 43 9.8 0.93/106 7.5 × 10-3 4
medium [0.15−0.25[ − − 23 5.0 1.18/102
medium [0.15−0.25[ 22 5.3 1.04/100 1.8 × 10-3 4
low <0.15 − − 8.0 1.8 1.32/120
low <0.15 7.9 1.8 1.17/118 8.1 × 10-4 4

Notes. Uncertainties are given at a 90% confidence level for one interesting parameter.

(a)

Average observed 2−10 keV fluxes in units of 10-12 erg cm-2 s-1.

(b)

Average 2−10 keV luminosities in units of 1035 erg s-1 calculated by adopting the distances of Table 6.

(c)

F-test probability for the addition of the blackbody component (previous line).

(d)

Fit performed with the column density constrained to be higher than the one derived from optical extinction towards the optical counterpart (see Sect 4.3).

(e)

Fit performed with the column density constrained to be higher than the Galactic value (see Sect 4.3).

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