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Table 1.

Best-fit parameters for GRO J1744–28 spectrum as observed with XMM-Newton (obsid. 0821120101) and described with an absorbed blackbody (BB), power law (PL), and accretion-heated atmosphere (ATM) models.

Parameter/model BB PL AHATM
NH, 1022 cm−2 7.1(5) 13.8(5) 8.6(4)
kT keV/Γ/a 1.25(4) 2.6(1) 0.13(1)
A/10−3 34(5) 1.4(4)
CM1 1.05(5) 1.05(5) 1.05(5)
CM2 1.03(5) 1.03(5) 1.03(5)
FX, obs,10−13 erg cm−2 s−1 6.4(2) 6.8(2) 6.6(2)
FX, src,10−13 erg cm−2 s−1 9.9(4) 48(8) 11.8(4)
χ2/d.o.f. 86.36/86 63.72/86 73.51/86

Notes. The fit statistics and estimated source flux in the 0.5−10 keV energy band (observed and unabsorbed) are also listed for each model.

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