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Table 1

Spectral parameters of the total (combined) spectrum of T Pyx (0.2−9.0 keV).

CEVMKL1 MEKAL2
NH1 (× 1022 cm-2) 0.1 0.3
α 0.7 N/A
kT1 (keV) N/A 0.25
kTmax (keV) 37.0< N/A
Kcevmkl (× 10-5 cm-5) 4.4 N/A
Kmekal3 (× 10-6 cm-5) N/A 4.0
kT2 (keV) N/A 22<
Kmekal3 (× 10-5 cm-5) N/A 3.7

Notes.Ranges correspond to 90% confidence level errors (Δχ2 = 2.71 – single parameter); values of the fits are ≤1.0.

(1)

The model is (tbabs*CEVMKL); tbabs – Wilms et al. (2000); CEVMKL is a multitemperature plasma emission model built from the mekal code. Emission measures follow a power-law in temperature (dEM = (T/Tmax)α−1 dT/Tmax).

(2)

The model is (tbabs*(MEKAL+MEKAL)); MEKAL – Mewe et al. (1986).

(3)

The normalization constant of the MEKAL plasma emission models is K = (10-14/ 4πD2) × EM where EM (emission measure) = (integration is over the emitting volume V). The lower limits on temperature parameters are at 2σ significance level.

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