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Table 1

Orbital parameters and spin frequency of IGR J16597–3704 estimated from the NuSTAR data without a frequency derivative (left) and including a frequency derivative (right).

Parameters NuSTAR
RA (J2000) 16h59m32.9007s ± 0.0021s
Dec (J2000) −37°0714.22′′± 0.18′′
Porb (s) 2758.3(3) 2758.2(3)
x (lt-s) 0.00482(4) 0.00480(3)
TNOD (MJD) 58052.4892(2) 58052.4892(1)
e <4 × 10−2 <4 × 10−2
ν0 (Hz) 105.1758240(1) 105.1758271(3)
ν˙ (Hz s–1) –7.2(8) × 10−11
T0 (MJD) 58052.5 58052.5
/d.o.f. 315.14/165 210.37/164

Notes. Errors are at the 1 σ confidence level. Uncertainties are also scaled by a factor to take the high value of the reduced χ2 into account.

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