Analysis of extremely low signal-to-noise ratio data from INTEGRAL/PICsIT

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Table 6:

Parameters of the Crab spectral fitting obtained for dithering spectra extracted with the PPDF and OSA 7.0 (I - *ip_skymosaic*, V - *varmosaic*) methods. The PPDF spectrum was fitted in the 298-1938 keV range, OSA spectra in the 252-1848 keV range. Flux in the 300-1000 keV band is given in erg cm^-2 s^-1. Rows 2 and 3 show the OSA results obtained when single revolution spectra were fitted together with a free relative normalization, rows 4 and 5 correspond to the fit made for spectra extracted from all-data mosaics.
Method	$\Gamma$	Norm.	Flux	Red. $\chi ^{2}$
PPDF	2.07 $\pm$ 0.05	6.2 $\pm$ 1.7	$7.8\times 10^{-9}$	0.80
OSA, I	2.02 $\pm$ 0.16	2.7 $\pm$ 2.5	$4.6\times 10^{-9}$	0.19
OSA, V	2.05 $\pm$ 0.07	3.4 $\pm$ 1.3	$4.1\times 10^{-9}$	0.97
OSA, I	1.98 $\pm$ 0.21	1.6 $\pm$ 1.8	$3.3\times 10^{-9}$	0.14
OSA, V	2.02 $\pm$ 0.07	2.3 $\pm$ 0.9	$4.0\times 10^{-9}$	2.39

Source LaTeX | All tables | In the text

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