An in-depth analysis of the variable cyclotron lines in GX 301−2

Open Access

Table 4.

Summary of the search for CRSF2 in the phase-resolved spectra.

Phase Bin	Residuals indicate CRSF2 ^(a)	E, σ, d constrained ^(b)	Δχ²^(c)	N_FP^(d)	Confidence		Final evaluation ^(e)
					[%]	[σ]
0	N	N	6	15 013	84.987	1.4σ	N
1	N	Y	27	38	99.962	3.5σ	Y
2	Y	Y	50	5	99.995	4.0σ	Y
3	N	N	3	50 986	49.014	0.6σ	N
4	Y	Y	40	12	99.988	3.8σ	Y
5	N	Y	7	17 212	82.788	1.3σ	N
6	N	N	3	35 919	64.081	0.9σ	N
7	N	Y	8	4 161	95.839	2.0σ	N

Notes.

^(a)

Indicator whether the residuals of a fit that excludes CRSF2 indicate a missing model component at 50 keV.

^(b)

Indicator whether the energy, width, and strength of CRSF2 constrained in a spectral fit.

^(c)

Improvement in statistic upon inclusion of CRSF2 in the spectral model.

^(d)

Number of false positives out of 100 000 simulated spectra where Δχ² exceeds the corresponding value upon inclusion of CRSF2.

^(e)

Final evaluation whether CRSF2 is detected in the corresponding phase bin.

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