The NICER view of Scorpius X-1 | Astronomy & Astrophysics (A&A)

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Table 1.

Statistical parameters of the QPOs discovered in Obs-1.

	NBO			FBO			HBO

Id	Freq. (Hz)	Q factor	σ	Freq. (Hz)	Q factor	σ	Freq. (Hz)	Q factor	σ	χ_ν²(d.o.f)
220601	–	–	–	$12 . 34_{- 0.65}^{+ 0.68}$ $12.34^{+0.68}_{-0.65}$	3.46	3.28	–	–	–	1.01(122)
290800	$8 . 49_{- 0.92}^{+ 1.14}$ $8.49^{+1.14}_{-0.92}$	0.95	4.03	$14 . 58_{- 0.25}^{+ 0.25}$ $14.58^{+0.25}_{-0.25}$	6.85	3.04	–	–	–	0.80(128)
300801	–	–	–	$11 . 83_{- 0.50}^{+ 0.48}$ $11.83^{+0.48}_{-0.50}$	1.60	9.64	–	–	–	0.85(122)
310802	–	–	–	$9 . 75_{- 0.49}^{+ 0.50}$ $9.75^{+0.50}_{-0.49}$	1.12	10.90	–	–	–	0.99(122)
320803	$4 . 50_{- 0.16}^{+ 0.19}$ $4.50^{+0.19}_{-0.16}$	7.14	3.03	$7 . 41_{- 0.24}^{+ 0.25}$ $7.41^{+0.25}_{-0.24}$	3.15	5.38	–	–	–	1.04(119)

Notes. For each type of QPO (i.e. NBO, FBO, and HBO), we show the centroid frequency (in hertz), Q-factor, and statistical significance (in sigmas). The last column shows the goodness of fit for the multi-Lorentzian model employed to fit each PDS.

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