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

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Table 2:

Typical source ( $R_{\rm s}$ ) and background ( $R_{\rm b}$ ) count rates observed with PICsIT (upper part, Rev. 0301) and ISGRI (lower part, Rev. 0079) for sources of 50 mCrab and 2 mCrab strength, respectively. Corresponding numbers of counts, $N_{\rm s}$ and $N_{\rm b}$ , were calculated for science windows with a 2 ks exposure time. S/N is the signal-to-noise ratio, and $k_{3\sigma }$ is the number of science windows with the 2 ks exposure time needed to obtain a 3-sigma detection.
Energy range	$R_{\rm s}$	$N_{\rm s}$	$R_{\rm b}$	$N_{\rm b}$	S/N	$k_{3\sigma }$
[keV]	[cps]		[cps]
298-319	0.046	74	52.0	104 000	0.23	170
433-461	0.017	24	32.0	64 000	0.10	900
717-816	0.010	15	36.0	72 000	0.06	2500
22-30	0.184	294	36.0	57 600	1.22	6
71-80	0.019	30	22.4	35 840	0.16	350
150-250	0.008	12	53.6	86 400	0.04	5625

Source LaTeX | All tables | In the text

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