Study of SVOM/ECLAIRs inhomogeneities in the detection plane below 8 keV and their mitigation for the trigger performances

Open Access

Table 2

False-trigger rate resulting from heat-pipe noise in the count-rate trigger (CRT), the result from a simulation combining the simulated CXB with 1.74 × 10⁵ s of TVAC data.

Timescale (s)	0.01	0.02	0.04	0.08	0.16
4–8 keV	0%	0%	0%	0%	0%
	(0/1 340 000)	(0/1 280 000)	(0/1 190 000)	(0/1 040 000)	(0/824 375)

4-120 keV	0%	0%	0%	0%	0%
	(0/1 340 000)	(0/1 280 000)	(0/1 190 000)	(0/1 040 000)	(0/824 375)

Timescale (s)	0.64	1.28	2.56	5.12	10.24

4–8 keV	0%	0.001%	0%	0.006%	0.136%
	(0/327 188)	(2/160 686)	(0/750 400)	(2/36 040)	(24/17 670)

4–120 keV	0%	0.002%	0%	0.006%	0%
	0	(3/160 686)	(0/750 400)	(5/36 040)	(0/17 670)

Notes. The two lines indicate the fraction of intervals showing a trigger (top) and the numbers from which this fraction is calculated (number of intervals with a trigger divided by number of independent intervals during TVAC).

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