A simple relation: Neutron star magnetic field strength and spectral shape at low mass accretion rates

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Table 2.

Predicted magnetic field strengths and cyclotron line energies based on the observation-driven linear relation between intersection energy and cyclotron line energy and assuming z = 0.24.

Source	E_int	E_CRSF^predicted	B^predicted
	[keV]	[keV]	[10¹² G]
X Per	$28 . 1_{- 0.6}^{+ 0.7}$ $Mathematical equation: $ 28.1^{+0.7}_{-0.6} $$	116 ± 3	12.5 ± 0.3
SRGA J124404.1-632232	$13_{- 3}^{+ 4}$ $Mathematical equation: $ 13^{+4}_{-3} $$	50 ± 20	6 ± 2
MAXI J0655−013	12 ± 2	52 ± 5	5.5 ± 0.6
IGR J21347+4737	14 ± 2	$56_{- 6}^{+ 7}$ $Mathematical equation: $ 56^{+7}_{-6} $$	$6 . 0_{- 0.6}^{+ 0.7}$ $Mathematical equation: $ 6.0^{+0.7}_{-0.6} $$
2SXPS J075542.5−293353	13.2 ± 0.6	55 ± 3	5.9 ± 0.3

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