Extended Data Table 2 Mass measurements of neutron stars in other types of systems

LAMOST J1123

–

1.24(3)

0.61

0.274

¹²⁰

PSR J0045−7319

–

1.58(34)

10

926.3

4463

51.17

⁷⁵

PSR J1903+0327

1.666(12)

–

1.033

2.15

0.0188

95.17

³

PSR J1723−2837

1.22(26)

–

0.36

1.856

0.008

0.615

¹²¹

PSR J2039−5617

1.3(1)

–

0.2

2.651

0.014

0.228

¹²²

PSR J2339−0533

1.64(27)

–

0.35

2.884

0.014

0.193

¹²¹

PSR J1023+0038

1.71(16)

–

0.24

1.688

0.0053

0.198

¹²³

PSR J2129−0429

1.74(18)

–

0.44

7.62

0.635

¹²⁴

PSR J2215+5135

2.28(10)

–

0.25

2.610

0.0334

0.173

¹²⁵

PSR J1555−2908

1.67(7)

–

0.06

1.788

0.045

0.234

¹²⁶

PSR J1301+0833

1.74(20)

–

0.035

1.84

0.27

¹²⁷

PSR J1810+1744

2.13(4)

–

0.065

1.66

0.15

¹²⁸

PSR J1653−0158

2.17(21)

–

0.014

1.968

0.0008

0.052

¹²⁹

PSR J1959+2048

2.18(9)

–

0.033

1.607

0.0169

0.382

¹²⁵

PSR J0952−0607

2.35(17)

–

0.032

1.41

0.0046

0.268

¹³⁰

PSR J0030+0451

1.44(15)

–

–

4.865

0.010

–

^131,132

4U 1608−52

1.57(30)

–

1.61

0.537

¹³³

KS 1731−260

1.61(37)

–

1.91

¹³³

X1822−371

–

1.69(13)

0.46

590

0.232

¹³⁴

4U 1538−522

–

1.02(17)

16

526.8

3.728

¹³⁴

SMC X-1

–

1.21(12)

18

0.71

3.892

¹³⁵

XTE J1855-026

–

1.41(24)

21

360.7

6.074

¹³⁵

LMC X-4

–

1.57(11)

18

13.5

1.408

¹³⁵

Cen X-3

–

1.57(16)

24

4.8

2.087

¹³⁵

SAX J1802.7−2017

–

1.57(25)

22

139.6

4.570

¹³⁵

OAO 1657−415

–

1.74(30)

17.5

37.3

10.447

¹³⁵

EXO 1722−363

–

1.91(45)

18

413.9

9.741

¹³⁵

4U 1700−377

–

1.96(19)

46

3.412

¹³⁵

J013236.7+303228

–

2.0(4)

11

1.73

¹³⁶

Vela X-1

–

2.12(16)

26

283.2

8.964

¹³⁵

GW170817

\(1.3{4}_{-0.09}^{+0.12}\)

\(1.3{8}_{-0.11}^{+0.11}\)

–

^47,49

GW190425

\(1.6{4}_{-0.11}^{+0.13}\)

\(1.6{6}_{-0.12}^{+0.12}\)

–

^48,49

GW191219

–

\(1.1{7}_{-0.06}^{+0.07}\)

31.1

⁵¹

GW200115

–

\(1.{4}_{-0.2}^{+0.6}\)

5.9

⁵⁰

GW200105

–

\(1.{9}_{-0.2}^{+0.2}\)

8.9

⁵⁰