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Home All issues Volume 499 / No 2 (May IV 2009) A&A, 499 2 (2009) 439-453 Full HTML
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Table 2:

Best-fit model parameters of the 15-150 keV and of the 0.3-10 keV spectra of the $\gamma $-ray prompt and X-ray afterglow measured with BAT and XRT, respectivelya.

Interval		 Energy band Start time Stop time $\beta$ $N_{\rm H,z}$ Mean flux AV,zb $\chi^2$/d.o.f.
  (keV) (s) (s)   (1021 cm-2) (erg cm-2 s-1)    

T90		 15-150 0.0 67.0 $1.44\pm0.46$ - $(3.3\pm0.8)\times10^{-7}$ - 1.44/6
Total 15-150 -2.0 90.0 $1.65\pm0.51$ - $(3.6\pm0.8)\times10^{-7}$ - 5.6/7
Pulses 1-3 15-150 -2.0 20.0 $2.0\pm0.5$ - $(2.2\pm0.5)\times10^{-7}$ - 1.82/7
Pulse 4 15-150 52.9 90.0 $1.4\pm0.5$ - $(1.4\pm0.5)\times10^{-7}$ - 5.8/5
Peak 15-150 0.384 0.832 $1.1\pm0.6$ - $(1.0\pm0.2)^{c}$ - 6.1/6
XRT-WT 0.3-10 77 134 $\rm 1.06_{-0.09}^{+0.10}$ <1.4 $(4.1\pm0.3)\times10^{-10}$ - 28.3/31
Plateau 0.3-10 423 1507 $\rm0.80_{-0.15}^{+0.16}$ $\rm 1.6_{-1.5}^{+1.8}$ $(2.3\pm0.3)\times10^{-11}$ - 17.2/24
SED 2 opt-X 186.8 269.4 $0.74\pm0.03$ [2.7] - <0.04 8.2/6
SED 3 opt-X 423 1507 $0.79\pm0.01$ $2.7\pm0.8$ - <0.02 32/34
SED 4 opt 78 117 93 620 $0.85\pm0.30$ - - 0.10-0.06+0.14 3.4/4
SED 2 opt 186.8 269.4 $0.61\pm0.13$ - - [0] 3.1/3
SED 3 opt 423 1507 $0.74\pm0.05$ - - [0] 7.9/8
SED 4 opt 78 117 93 620 $1.05\pm0.06$ - - [0] 4.8/5
a The model is an absorbed power law (xspec model: pegpwrlw for BAT and wabs pow for XRT data, respectively). Frozen values are reported among square brackets. SED modelling results are also reported, both derived for the broad band from optical to X-rays and optical points alone. The extinction is modelled with a SMC profile as parametrised by Pei (1992); b rest-frame extinction obtained by modelling the SED with an SMC profile as parametrised by Pei (1992); c peak photon flux in units of ph cm-2 s-1.

Source LaTeX | All tables | In the text

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