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

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Table A.2:

Uncertainty tests done for the OSA 7.0 and PPDF spectral extraction methods. $\chi ^{2}$ is summed over all 500 shots, $\bar{\sigma}$ is an arithmetic mean of the standard deviation errors, $f_{1\sigma }$ is a fraction of shots covering the true count rate value inside the error limits and $f_{\rm s}$ is a similar fraction of shots computed for the shortest credible interval errors for the PPDF method. Three rows at the bottom present the results of the same test made for the background assumed to be 10 times higher than the default one.
Energy range	OSA 7.0			PPDF
[keV]	$\chi ^{2}$	$\bar{\sigma}$	$f_{1\sigma }$	$\chi ^{2}$	$\bar{\sigma}$	$f_{1\sigma }$	$f_{\rm s}$
14.0-17.8	471	0.0114	0.69	425	0.0089	0.73	0.72
17.8-21.6	566	0.0087	0.65	537	0.0084	0.66	0.64
21.6-25.4	467	0.0086	0.67	443	0.0084	0.71	0.71
25.4-31.2	478	0.0090	0.68	503	0.0087	0.68	0.68
31.2-37.9	481	0.0081	0.72	459	0.0078	0.73	0.71
37.9-45.6	513	0.0080	0.67	569	0.0076	0.65	0.63
45.6-55.1	489	0.0094	0.70	486	0.0085	0.72	0.68
55.1-68.5	508	0.0130	0.69	443	0.0105	0.74	0.56
68.5-85.8	447	0.0112	0.71	344	0.0088	0.78	0.65
85.8-112.6	462	0.0109	0.71	285	0.0083	0.82	0.61
112.6-166.2	460	0.0125	0.70	459	0.0091	0.71	0.75
25.4-31.2	537	0.0284	0.71	348	0.0225	0.78	0.66
45.6-55.1	487	0.0299	0.67	435	0.0221	0.72	0.75
85.8-112.6	513	0.0344	0.65	367	0.0207	0.76	0.88

Source LaTeX | All tables | In the text

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