Table 6
Best-fit parameters of the combined BeppoSAX spectra of BL Lac in the 0.3−100 keV range using the following four models†: phabs*power, phabs*bbody, phabs*(bbody+power) and phabs*BMC.
| Model | Parameter | S1 | S2 | S3 | S4 | S5 |
|
|
||||||
| phabs | NH (× 1021 cm-2) | 5.7±0.5 | 2.5±0.9 | 6.8±0.09 | 7.6±0.2 | 2.9±0.6 |
| powerlaw | Γpow | 2.01±0.09 | 1.89±0.05 | 1.71±0.04 | 1.94±0.09 | 2.61±0.04 |
| Npow†† | 440±90 | 206±20 | 302±30 | 210±55 | 1686±110 | |
|
|
||||||
| χ2 (d.o.f.) | 1.15 (80) | 1.29 (82) | 1.3 (79) | 0.72 (79) | 1.05 (116) | |
|
|
||||||
| phabs | NH (× 1021 cm-2) | 3.7±0.2 | 2.5±0.3 | 6.7±0.5 | 6.8±0.3 | 2.9±0.08 |
| bbody | TBB (keV) | 1.00±0.02 | 0.84±0.01 | 1.19±0.01 | 1.00±0.01 | 0.67±0.01 |
| NBB†† | 13.8±0.7 | 8.7±0.2 | 15.4±0.3 | 7.5±0.3 | 32.9±0.6 | |
|
|
||||||
| χ2 (d.o.f.) | 3.76 (80) | 12.5 (82) | 2.31 (79) | 3.06 (79) | 13.44 (116) | |
|
|
||||||
| phabs | NH (× 1021 cm-2) | 2.7±0.3 | 2.7±0.2 | 2.7±0.6 | 4.7±0.4 | 3.0±0.1 |
| bbody | TBB (keV) | 0.8±0.1 | 0.38±0.03 | 1.02±0.03 | 0.64±0.16 | 0.37±0.05 |
| NBB†† | 6.4±1.7 | 3.05±0.03 | 3.8±0.3 | 1.4±0.1 | 8.7±1.2 | |
| powerlaw | Γpow | 1.67±0.09 | 1.65±0.08 | 1.46±0.03 | 1.6±0.3 | 2.4±0.1 |
| Npow†† | 300±100 | 134±36 | 150±10 | 108±80 | 1290±220 | |
|
|
||||||
| χ2 (d.o.f.) | 1.34 (78) | 0.87 (80) | 1.78 (77) | 0.75 (77) | 0.97 (114) | |
|
|
||||||
| phabs | NH (× 1021 cm-2) | 2.1±0.7 | 1.5±0.6 | 6.9±0.1 | 7.4±0.3 | 2.9±0.1 |
| BMC | ΓBMC | 1.8±0.1 | 2.07±0.09 | 2.21±0.09 | 2.1±0.2 | 2.2±0.2 |
| Ts (eV) | 73±5 | 108±9 | 71±10 | 48±7 | 50±10 | |
| logA | −0.32±0.04 | 0.24±0.09 | −0.72±0.09 | −0.86±0.04 | 0.35±0.07 | |
| NBMC†† | 0.36±0.09 | 0.6±0.2 | 0.98±0.07 | 2.5±0.3 | 3.08±0.06 | |
|
|
||||||
| χ2 (d.o.f.) | 1.05 (78) | 0.87 (80) | 1.17 (77) | 0.95 (77) | 1.08 (114) | |
Notes.
The normalization parameters of blackbody and BMC components are in units of 
erg s-1 kpc-2, where 
is the soft photon luminosity in units of 1034 erg s-1, d10 is the distance to the source in units of 10 kpc, and the powerlaw component is in units of keV-1 cm-2 s-1 at 1 keV. TBB and Ts are the temperatures of the blackbody and seed photon components, respectively (in keV and eV). Γpow and ΓBMC are the indices of the powerlaw and BMC, respectively.
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