Swift/XRT monitoring of the orbital and superorbital modulations in 4U 1909+07

Open Access

Table 1.

Orbital and superorbital phase-resolved spectral analysis.

Phase	N_H	Γ	F_{0.3 − 10 keV}	Cstat
range	10²²		10⁻¹¹	/d.o.f.
	(cm⁻²)		(erg cm⁻² s⁻¹)
Orbital

0.000–0.083	$13 . 4_{- 1.4}^{+ 1.5}$ $13.4^{+1.5}_{-1.4}$	$1 . 2_{- 0.2}^{+ 0.2}$ $1.2^{+0.2}_{-0.2}$	$15 . 2_{- 0.8}^{+ 0.8}$ $15.2^{+0.8}_{-0.8}$	610.9/640
0.083–0.167	$10 . 9_{- 1.5}^{+ 1.7}$ $10.9^{+1.7}_{-1.5}$	$1 . 0_{- 0.2}^{+ 0.3}$ $1.0^{+0.3}_{-0.2}$	$17 . 1_{- 1.1}^{+ 1.2}$ $17.1^{+1.2}_{-1.1}$	546.1/578
0.167–0.250	$9 . 9_{- 1.1}^{+ 1.2}$ $9.9^{+1.2}_{-1.1}$	$1 . 2_{- 0.2}^{+ 0.2}$ $1.2^{+0.2}_{-0.2}$	$13 . 0_{- 0.7}^{+ 0.7}$ $13.0^{+0.7}_{-0.7}$	633.9/659
0.250–0.333	$9 . 0_{- 0.9}^{+ 0.9}$ $9.0^{+0.9}_{-0.9}$	$1 . 2_{- 0.2}^{+ 0.2}$ $1.2^{+0.2}_{-0.2}$	$17 . 2_{- 0.8}^{+ 0.8}$ $17.2^{+0.8}_{-0.8}$	659.7/704
0.333–0.417	$8 . 5_{- 1.0}^{+ 1.0}$ $8.5^{+1.0}_{-1.0}$	$0 . 9_{- 0.2}^{+ 0.2}$ $0.9^{+0.2}_{-0.2}$	$21 . 7_{- 1.1}^{+ 1.1}$ $21.7^{+1.1}_{-1.1}$	640.1/693
0.417–0.500	$8 . 3_{- 0.9}^{+ 1.0}$ $8.3^{+1.0}_{-0.9}$	$1 . 0_{- 0.2}^{+ 0.2}$ $1.0^{+0.2}_{-0.2}$	$23 . 3_{- 1.1}^{+ 1.2}$ $23.3^{+1.2}_{-1.1}$	698.9/682
0.500–0.583	$10 . 4_{- 1.1}^{+ 1.2}$ $10.4^{+1.2}_{-1.1}$	$1 . 0_{- 0.2}^{+ 0.2}$ $1.0^{+0.2}_{-0.2}$	$15 . 4_{- 0.7}^{+ 0.7}$ $15.4^{+0.7}_{-0.7}$	668.1/718
0.583–0.667	$11 . 3_{- 1.4}^{+ 1.5}$ $11.3^{+1.5}_{-1.4}$	$0 . 8_{- 0.2}^{+ 0.2}$ $0.8^{+0.2}_{-0.2}$	$12 . 7_{- 0.6}^{+ 0.7}$ $12.7^{+0.7}_{-0.6}$	597.2/676
0.667–0.750	$15 . 7_{- 2.4}^{+ 2.7}$ $15.7^{+2.7}_{-2.4}$	$1 . 1_{- 0.3}^{+ 0.3}$ $1.1^{+0.3}_{-0.3}$	$13 . 7_{- 0.9}^{+ 1.0}$ $13.7^{+1.0}_{-0.9}$	475.6/559
0.750–0.833	$27 . 7_{- 5.2}^{+ 5.8}$ $27.7^{+5.8}_{-5.2}$	$1 . 2_{- 0.4}^{+ 0.5}$ $1.2^{+0.5}_{-0.4}$	$7 . 5_{- 0.6}^{+ 0.7}$ $7.5^{+0.7}_{-0.6}$	439.8/480
0.833–0.917	$18 . 9_{- 3.6}^{+ 4.1}$ $18.9^{+4.1}_{-3.6}$	$0 . 4_{- 0.3}^{+ 0.3}$ $0.4^{+0.3}_{-0.3}$	$8 . 8_{- 0.6}^{+ 0.7}$ $8.8^{+0.7}_{-0.6}$	544.6/557
0.917–0.999	$19 . 5_{- 2.3}^{+ 2.5}$ $19.5^{+2.5}_{-2.3}$	$1 . 1_{- 0.2}^{+ 0.3}$ $1.1^{+0.3}_{-0.2}$	$10 . 8_{- 0.6}^{+ 0.6}$ $10.8^{+0.6}_{-0.6}$	579.8/649

Superorbital

0.000–0.083	$12 . 8_{- 1.9}^{+ 2.1}$ $12.8^{+2.1}_{-1.9}$	$0 . 8_{- 0.3}^{+ 0.3}$ $0.8^{+0.3}_{-0.3}$	$9 . 4_{- 0.6}^{+ 0.7}$ $9.4^{+0.7}_{-0.6}$	532.1/577
0.083–0.167	$9 . 1_{- 1.2}^{+ 1.3}$ $9.1^{+1.3}_{-1.2}$	$1 . 0_{- 0.2}^{+ 0.2}$ $1.0^{+0.2}_{-0.2}$	$13 . 3_{- 0.8}^{+ 0.9}$ $13.3^{+0.9}_{-0.8}$	520.0/609
0.167–0.250	$12 . 1_{- 1.6}^{+ 1.8}$ $12.1^{+1.8}_{-1.6}$	$1 . 0_{- 0.2}^{+ 0.2}$ $1.0^{+0.2}_{-0.2}$	$10 . 6_{- 0.6}^{+ 0.7}$ $10.6^{+0.7}_{-0.6}$	599.1/609
0.250–0.333	$9 . 5_{- 1.1}^{+ 1.2}$ $9.5^{+1.2}_{-1.1}$	$0 . 7_{- 0.2}^{+ 0.2}$ $0.7^{+0.2}_{-0.2}$	$18 . 3_{- 0.9}^{+ 1.0}$ $18.3^{+1.0}_{-0.9}$	695.2/666
0.333–0.417	$9 . 9_{- 1.1}^{+ 1.2}$ $9.9^{+1.2}_{-1.1}$	$0 . 8_{- 0.2}^{+ 0.2}$ $0.8^{+0.2}_{-0.2}$	$15 . 8_{- 0.7}^{+ 0.8}$ $15.8^{+0.8}_{-0.7}$	708.6/701
0.417–0.500	$11 . 2_{- 1.5}^{+ 1.6}$ $11.2^{+1.6}_{-1.5}$	$0 . 8_{- 0.2}^{+ 0.2}$ $0.8^{+0.2}_{-0.2}$	$21 . 2_{- 1.2}^{+ 1.3}$ $21.2^{+1.3}_{-1.2}$	562.9/636
0.500–0.583	$9 . 7_{- 1.3}^{+ 1.5}$ $9.7^{+1.5}_{-1.3}$	$0 . 7_{- 0.2}^{+ 0.2}$ $0.7^{+0.2}_{-0.2}$	$14 . 7_{- 0.8}^{+ 0.9}$ $14.7^{+0.9}_{-0.8}$	631.8/645
0.583–0.667	$12 . 3_{- 1.3}^{+ 1.4}$ $12.3^{+1.4}_{-1.3}$	$1 . 2_{- 0.2}^{+ 0.2}$ $1.2^{+0.2}_{-0.2}$	$11 . 9_{- 0.6}^{+ 0.6}$ $11.9^{+0.6}_{-0.6}$	635.5/672
0.667–0.750	$10 . 1_{- 1.5}^{+ 1.7}$ $10.1^{+1.7}_{-1.5}$	$1 . 1_{- 0.3}^{+ 0.3}$ $1.1^{+0.3}_{-0.3}$	$12 . 6_{- 0.9}^{+ 1.0}$ $12.6^{+1.0}_{-0.9}$	462.6/540
0.750–0.833	$9 . 6_{- 1.1}^{+ 1.2}$ $9.6^{+1.2}_{-1.1}$	$0 . 9_{- 0.2}^{+ 0.2}$ $0.9^{+0.2}_{-0.2}$	$19 . 4_{- 1.0}^{+ 1.0}$ $19.4^{+1.0}_{-1.0}$	691.7/675
0.833–0.917	$10 . 4_{- 1.3}^{+ 1.4}$ $10.4^{+1.4}_{-1.3}$	$0 . 9_{- 0.2}^{+ 0.2}$ $0.9^{+0.2}_{-0.2}$	$15 . 0_{- 0.8}^{+ 0.8}$ $15.0^{+0.8}_{-0.8}$	701.9/660
0.917–0.999	$9 . 8_{- 1.1}^{+ 1.2}$ $9.8^{+1.2}_{-1.1}$	$0 . 8_{- 0.2}^{+ 0.2}$ $0.8^{+0.2}_{-0.2}$	$14 . 9_{- 0.7}^{+ 0.7}$ $14.9^{+0.7}_{-0.7}$	674.7/709

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