176
A. Patruno and A. L. Watts
Table 4.3
Pulse frequency and spin frequency derivatives
Source
Pulse freq. deriv.
˙
ν
Timing noise
PFD
Spin freq. deriv
˙
ν
s
SFD
(PFD)
[ Hz s −1
]
strength
reference
(SFD) [ Hz s −1
]
reference
SAX J1808.4-3658
4.4
× 10 −13
;
−7.6 × 10 −14
s
[36]
<|2.5|
× 10 −14
[123, 125]
XTE J1807-294
2.5
× 10 −14
s
[287]
<|4|
× 10 −14
[254]
IGR J00291+5934
[5; 11]
× 10 −13
w
[37, 88, 245]
+5.5 × 10 −13
[37, 88, 126, 245, 249]
XTE J1814-338
−6.7 × 10 −14
s
[239]
<|1.5|
× 10 −14
[127]
XTE J0929-314
−9.2(4) × 10 −14
s
[99]
XTE J1751-305
5.6
× 10 −13
w
[241]
IGR J17511-3057
1.6
× 10 −13
s
[289]
IGR J17498-2921
−6.3 × 10 −14
w
[244]
HETE J1900.1-2455
s
[2.3; 0.4]
× 10 −13
[250]
Swift J1756.9-2508
w
<|3|
× 10 −13
[260]
Swift J1749.4-2807
s
<|1.2|
× 10 −12
[201]
IGR J18245-2452
?
<|1.3|
× 10 −12
[247]
The AMXPs Aql X-1, SAX J1748.9-2021 and NGC 6440 X-2 do not appear in the table above as the observting baseline is too short to provide meaningful
upper limits