Millisecond Pulsar Catalogue

List of rotation and accretion powered millisecond pulsars

compiled by Alessandro Patruno
last updated 5 Aug 2014

If you spot a mistake please submit a correction with this form:

NOTES

The pulsars are shown with their spin period in ascending order. The AMXPs are instead displayed at the end of the table.

The criteria used for sources selections are the following:

  • Spin period < 30 ms
  • Surface Magnetic Field < 1e11 G

[The source B1718-19 (spin P~1 s) is not included even if this is a Redback]

An ASCII version of the table is available upon request

Resources: ATNF pulsar catalogue
P. Freire’s globular cluster catalogue
D. Lorimer’s Catalogue
A. Patruno & A. Watts 2012 “Accreting Millisecond X-Ray Pulsars”
M. Roberts 2012 “Surrounded by Spiders”

Source Type Notation:

MSP = millisecond pulsar in the field
MSP-GC = millisecond pulsar in globular cluster
RB-F = Redback in the field
RB-GC = Redback in globular cluster
BW-F = Black Widow in the field
BW-GC = Black Widow in globular cluster
AMXP = Accreting Millisecond X-Ray Pulsar
MSP-DNS= millisecond pulsar with neutron star companion
MSP-planet = millisecond pulsar with planetary size companion
MSP-triple = millisecond pulsar in a triple system (MSP + 2 WDs)

Legend:

P = spin period (in seconds); PDOT = spin period derivative; DM = dispersion measure; DIST = distance [kiloparsecs]; A1 = projected orbital semimajor axis [in light-seconds]; PB = orbital period [days]; ECC = eccentricity; MIN MASS = minimum companion mass in Solar mass units; TYPE = pulsar type;

 

NAME P
[s]
PDOT DM DIST
[kpc]
A1
[lt-s]
PB
[d]
Ecc Min
Mass [Msun]
TYPE
J1748-2446ad 0.00139595 0 235.6 * 1.1028 1.09443 0 0.16 RB-GC
B1937+21 0.001557806472 1.051212E-19 71.0398 5.00 * * * * MSP
B1957+20 0.001607401684 1.68515E-20 29.1168 1.53 0.0892253 0.3819666069 0.00000 0.021423 BW-F
J1747-4036 0.00165 * 152.9 5.74 * * * * MSP
J1810+17 0.00166 * 39.7 2.49 * 0.15 * 0.044 BW-F
J1748-2446O 0.00167663 0 236.38 * 0.112 0.2595 0 0.04 BW-GC
J1023+0038 0.0016879874440059 1.2E-20 14.325 1.37 0.3433494 0.1980962019 * 0.134647 RB-F
J1227-4853 0.001690 * 48.5 * NA 0.288 * * RB-F
J1748-2446P 0.00172862 0 238.79 * 1.272 0.3626 0 0.44 RB-GC
J1902-5110 0.00174 * 36.3 2.11 * * * * MSP
J1301+0833 0.00184 * 13.2 0.91 * 0.27 * 0.024 BW-F
J1843-1113 0.001845666292 9.59E-21 59.96 1.97 * * * * MSP
J1723-2837 0.001855732795729 7.5E-21 19.688 1.00 1.225807 0.615436473 * 0.235930 RB-F
J0034-0534 0.001877181884 4.966E-21 13.76517 0.98 1.437769 1.589281801 1.4E-5 0.141098 MSP
J0955-61 0.00199 * 160.7 * * * * * MSP
J2052+12 0.00199 * 42.0 * * * * * MSP
J1431-4715 0.0020 * 59.4 * * * * * MSP
J1649+80 0.002010 * 31.0 * * * * * MSP
J1748-2446Y 0.00204816 0 239.11 * 1.16 1.17 0 0.16 MSP-GC
J1543-5149 0.002056960392 1.61E-20 50.92 1.46 6.480281 8.06077304 2.12E-5 0.223275 MSP
J1748-2446V 0.00207251 0 239.11 * 0.567 0.5036 0 0.14 MSP-GC
J0023-7203J 0.00210063 -9.7922e-21 24.5848 * 0.04040 0.12066 <0.00004 0.024 BW-GC
J1513-25 0.002120 * 46.9 * 0.053 0.197 * * MSP
J1805+06 0.00213 * 64.9 * * * * * MSP
J1903+0327 0.002149912364 1.88208E-20 297.5245 6.45 105.5934643 95.174118753 0.436678409 0.887294 MSP
J1544+4937 0.00215928839043292 2.933E-21 23.2258 2.30 0.0328680 0.1207729895 * 0.016967 BW-F
J1342+2822C 0.002166 0 26.5 * * * * * MSP-GC
J2241-5236 0.0021866997715528 6.64E-21 11.41085 0.68 0.02579537 0.1456722395 0E-5 0.011721 BW-F
J1446-4701 0.00219469577985001 9.8102E-21 55.83202 2.03 0.0640118 0.27766607732 2.11E-5 0.018988 BW-F
J0024-7204Y 0.00219666 0 24.2 * 0.67176 0.52194 0.0 0.16 MSP-GC
J1748-2446E 0.0021978 0 236.84 * 23.6 60.06 0.02 0.25 MSP-GC
J1748-2446L 0.0022447 0 237.74 * * * * * MSP-GC
J2256-1023 0.00229 * 13.8 0.91 * 0.21 * 0.034 BW-F
J1701-3006F 0.0022947270806719 2.221E-19 113.291 6.90 0.0573400 0.2054870422 0.0E-4 0.020807 BW-GC
J2017-16 0.002310 * 25.4 * * * * * MSP
J0218+4232 0.002320 * 61.2 * 1.984 2.029 * * MSP
J1017-7156 0.00233851444011854 2.2194E-21 94.22407 0.26 4.83004509 6.511905 0.00014204 0.189065 MSP
J1731-1847 0.002344559583 2.49E-20 106.56 4.04 0.1201594 0.311134124 10.0E-5 0.033268 BW-F
J0024-7204W 0.00235234 0 24.3 * 0.2435 0.1330 0.0 0.14 RB-GC
J0155+18 0.00236 * 19.8 * * * * * MSP
J2043+1711 0.002379878960 5.24E-21 20.70987 1.13 1.6239614 1.482290809 3.34E-6 0.169028 MSP
J1858-2216 0.00238 * 26.6 1.35 * 46.1 * * MSP
J1342+2822B 0.002389420757786 1.858E-20 26.148 10.40 1.875655 1.417352298 * 0.204240 MSP-GC
J1124-36 0.00241 * 44.9 4.40 * 0.225 * 0.027 BW-F
J2205+60 0.00241 * 103.7 * * * * * MSP
J1658-5317 0.00244 * 30.9 1.24 * * * * MSP
J1824-2452F 0.002451 0 123.8 * * * * * MSP-GC
J1748-2446Z 0.00246259 0 238.85 * 3.5304 3.48807 0.7608 0.25 MSP-GC
J1518+0204C 0.002484 0 29.3 * 0.057 0.087 0.0 0.04 BW-GC
J1641+3627E 0.002487 0 30.3 * 0.17 0.213 0.0 0.0195 BW-GC
J1921+01 0.002500 * 104.9 * 0 0 * * MSP
J1135+75 0.00251 * 29.2 * * * * * MSP
J0251+26 0.00254 * 20.2 * * * * * MSP
J1342+2822A 0.002545 0 26.5 * * * * * MSP-GC
J0557+15 0.00256 * 102.7 * 4.035 4.847 * * MSP
J1909+21 0.00256 * 61.9 * * * * * MSP
J1311-3430 0.002560371031 2.0964E-20 37.84 3.72 0.010581 0.0651157335 * 0.008210 BW-F
J0101-6422 0.0025731519721683 5.16E-21 11.926 0.73 1.701046 1.787596706 0E-6 0.155329 MSP
J0248+42 0.00260 * 48.2 * * * * * MSP
J1546-3747A 0.002605672246 * 92.17 7.66 1.38325 1.3467116 * 0.152356 MSP
J2114+54 0.002610 * 77.4 * 0.044 0.135 * * MSP
J2215+51 0.00261 * 69.2 3.30 * 0.18 * 0.22 RB-F
J2310-05 0.00261 * 15.5 * * * * * MSP
J0024-7204F 0.00262358 6.45e-20 24.379 * * * * * MSP-GC
J1938+20 0.002630 * 237.1 * 8.31 16.256 * * MSP
J1125-6014 0.002630380739 4.01E-21 52.951 1.94 8.339198 8.75260353 7.9E-7 0.278278 MSP
J0024-7204O 0.0026433432972417 3.0353E-20 24.363 4.00 0.045151 0.1359743050 * 0.021584 BW-GC
J1745+1017 0.0026521296710897 2.729E-21 23.970 1.36 0.088172 0.730241444 * 0.013692 BW-F
J1811-2405 0.00266059331683918 1.33774E-20 60.6005 1.70 5.7056616 6.2723020692 1.64E-6 0.233365 MSP
J1327-0755 0.0026779231971205 1.773E-20 27.91215 2.17 6.645774 8.439086019 8.5E-7 0.221958 MSP
J1832-0836 0.0027191120623197 8.62E-21 28.18 1.40 * * * * MSP
J0621+25 0.00272 * 83.6 4.25 * * * * MSP
J0605+37 0.00273 * 21.0 1.16 * 55.6 * * MSP
J0337+1715 0.00273258863244 1.7666E-20 21.3162 1.30 1.21752844 1.629401788 0.00069178 0.116203 MSP-triple
J1906+01 0.002790 * 126.9 0.625 0.609 * * * MSP
J1748-2446Q 0.002812 0 234.50 * 28.602 30.295 0.722 0.53 MSP-GC
J0024-7204S 0.00283041 -1.2054e-19 24.353 * 0.76627 1.20172 0.00039 0.10 MSP-GC
J0636+5128 0.00286 * 11.1 0.009 0.067 * * * MSP
J0742+6620 0.00288 * 15.0 3.978 4.7672012 * * * MSP
J2339-0533 0.00288 * 8.72 * 0.612 0.193 * 0.26 RB-F
J2017+0603 0.002896215815562 8.3E-21 23.918 1.32 2.1929239 2.198481129 2.3E-6 0.176041 MSP
J1909-3744 0.002947108068 1.402542E-20 10.3934 1.26 1.89799106 1.533449474590 1.301E-7 0.195357 MSP
J0102+4839 0.002960 * 53.5 4.03 1.856 1.672 * * MSP
J1748-2446K 0.00296965 0 234.81 * * * * * MSP-GC
J2229+2643 0.0029778192947556 1.46E-21 23.019 1.43 18.912513 93.0158934 0.0002556 0.122075 MSP
J1518+0204D 0.002988 0 29.3 * 1.6 1.22 0.0 0.2 MSP-GC
J1748-2446X 0.00299926 0 240.03 * 5.1071 4.99850 0.3024 0.29 MSP-GC
J1823-3021D 0.00302 0 86.9 * * * * * MSP-GC
J0023+09 0.00305 * 14.3 0.95 * 0.14 * 0.016 BW-F
J0024-7204N 0.00305395 -2.187e-20 24.57 * * * * * MSP-GC
B1821-24A 0.00305431 1.55e-18 120 * * * * * MSP-GC
J1807-2459A 0.00305945 0 134.0 * 0.01220 0.07109 0.0 0.010 BW-GC
J0613-0200 0.003061844086 9.5913E-21 38.77919 0.90 1.0914444 1.1985125753 0.55E-5 0.128556 MSP
J1536-4948 0.00308 * 38.0 1.34 * * * * MSP
J1400-14 0.003084232817 0.0E-19 4.934 0.27 8.419236 9.5476162 * 0.263524 MSP
J1012-42 0.00310 71.6 * * * * * * MSP
J1125-5825 0.00310221391893416 6.08990E-20 124.7946 2.98 33.6383599 76.40321683 0.00025724 0.263128 MSP
J1641+3627D 0.003118 0 30.6 * 0.92 0.591 0.0 0.18 MSP-GC
J2214+3000 0.003119226579 1.40E-20 22.557 1.32 0.0590800 0.416632943 0E-4 0.013334 BW-F
J0740+41 0.00314 * 21.0 * * * * * MSP
J0614-3329 0.003148669579439 1.75E-20 37.049 2.96 27.638787 53.5846127 0.0001801 0.275254 MSP
J1614-2230 0.0031508076534271 9.6216E-21 34.4865 1.77 11.2911975 8.6866194196 1.29E-6 0.396862 MSP
J0307+7443 0.00316 * 6.35 0.34 16.108 37.108 * * MSP
J1640+2224 0.00316331581791380 0.28276E-20 18.4260 1.19 55.3297198 175.46066194 0.000797262 0.246983 MSP
J1946+3417 0.003170139227806 0.0000037E-15 110 6.41 * 27 0.14 * MSP
J1518+0204E 0.003182 0 29.3 * 1.2 1.10 0.0 0.18 MSP-GC
J1816+4510 0.00319 * 38.9 * * 0.36 * 0.16 RB-F
J1905+0154A 0.003193 0 193.692 * 0.5886 0.81255 0.0 0.090 MSP-GC
J1628-3205 0.00321 * 42.1 1.54 * 0.21 * 0.16 RB-F
J0024-7204H 0.00321034 -1.83e-21 24.36 * 2.15281 2.35770 0.07056 0.19 MSP-GC
J1710+4923 0.00322 * 7.1 * 75.4 36.5 NA NA MSP
J1836-2354B 0.00323227 0 93.7 * * * * * MSP-GC
J1701-3006E 0.00323374 0 113.78 * 0.0701 0.15848 0.0 0.035 BW-GC
J1911-5958A 0.00326619 3.07e-21 33.68 * 1.20605 0.83711 <0.00001 0.22 MSP-GC
J1748-2446U 0.00328914 0 235.46 * 5.97248 3.57026 0.60498 0.45 MSP-GC
J0340+41 0.00329 * 49.6 2.67 * * * * MSP
J1748-2446af 0.00330434 0 237.34 * * * * * MSP-GC
J1630+37 0.00332 * 14.1 0.85 * 12.5 * * MSP
J1836-2354A 0.00335434 0 89.1 * 0.0464 0.20276 0.0 0.020 BW-GC
J1103-5403 0.003392709659 3.7E-21 103.915 3.16 * * * * MSP
J1036-83 0.00341 27.1 * * * * * * MSP
J1701-3006D 0.0034177704450548 1.257E-19 14.224 6.90 0.9880185 1.1179034034 0.0004122 0.121516 MSP-GC
J2317+1439 0.003445251071 2.42E-21 21.907 1.89 2.3139483 2.459331464 0.0000005 0.172079 MSP
J2317+1439 0.0034452510710225 2.42E-21 21.907 1.89 2.3139483 2.459331464 0.0000005 0.172079 MSP
J0751+1807 0.003478770783 7.7860E-21 30.2489 0.40 0.3966127 0.263144266723 7.1E-7 0.128346 MSP
J0024-7204R 0.00348046 0 24.4 * 0.0334 0.0662 0.0 0.030 BW-GC
J0024-7204I 0.00348499 -4.587e-20 24.42 * 0.03844 0.22979 <0.0004 0.015 BW-GC
J1721-2457 0.003496633782 5.542E-21 47.758 1.56 * * * * MSP
B1639+36B 0.00352807 0 29.5 * 1.389 1.25911 <0.001 0.19 MSP-GC
J0024-7204E 0.00353632915276031 9.8509E-20 24.230 4.00 1.9818423 2.256844820 0.0003152 0.154893 MSP-GC
J1216-6410 0.003539375658423 1.62E-21 47.40 1.71 2.937091 4.03672718 6.8E-6 0.155852 MSP
J1933-6211 0.003543431438847 0.37E-20 11.499 0.63 12.281575 12.81940650 1.2E-6 0.323653 MSP
J1850+0124 0.003559763768 1.09E-20 118.89 2.97 34.00102 84.949858 6.90E-5 0.246062 MSP
J1748-2446M 0.00356957 0 238.65 * 0.596 0.4431 0 0.16 MSP-GC
J2234+06 0.003570 * 10.8 * 14 32 0.13 0.19 MSP
J1545-4550 0.00357528861884712 5.25E-20 68.4 2.01 3.8469053 6.203064928* 1.3E-5 0.153107 MSP
J1514-4946 0.00359 * 31.5 1.27 * * * * MSP
J1855-14 0.003590 * 109.2 * 0 0 * * MSP
J1701-3006B 0.00359385 -3.4978e-19 113.44 * 0.25277 0.14455 <0.00007 0.14 RB-GC
J1600-3053 0.00359792850865547 9.5004E-21 52.3262 2.40 8.801652 14.3484577709 17.369E-5 0.204856 MSP
J1902-70 0.00360 * 19.5 1.12 * * * * MSP
J1944+2236 0.003617993078 7.5E-21 185.45 8.46 * * * * MSP
J1911+0102A 0.00361852 -6.58e-21 202.678 * 0.03766 0.140996 <0.00013 0.020 BW-GC
J1801-1417 0.003625096660 5.31E-21 57.21 1.80 * * * * MSP
J1911-1114 0.0036257455713977 1.416E-20 30.9750 1.59 1.762875 2.71655761 1.9E-5 0.119864 MSP
J1828+0625 0.00363 * 22.4 1.18 * 6.0 * * MSP
J2234+0944 0.00363 * 17.8 * 0.068 0.420 * 0.016 BW-F
J0024-7204P 0.00364302 0 24.3 * 0.0380 0.1472 0.0 0.02 BW-GC
J1740-5340 0.00365033 1.68e-19 71.8 * 1.65284 1.35406 <0.0001 0.22 RB-GC
J1748-2446ae 0.00365859 0 238.75 * 0.0406 0.17073 0 0.019 BW-GC
J0023-7205M 0.00367664 -3.844e-20 24.42 * * * * * MSP-GC
J1231-1411 0.003683878711 2.280E-20 8.090 0.45 2.042633 1.860143882 4E-6 0.183932 MSP
J1147-66 0.00372 * 133.8 4.26 * * * * MSP
J1641+3627C 0.003722 0 30.1 * * * * * MSP-GC
J2129-5721 0.003726348482 2.08534E-20 31.853 0.40 3.5005674 6.625493093 1.21E-5 0.132090 MSP
J1801-0857C 0.003739 0 182.4 * * * * * MSP-GC
J1741+1351 0.0037471544 * 24.0 1.41 11.03 16.335 * 0.238883 MSP
J1302-32 0.00377 * 26.2 1.86 * * * * MSP
J1905+0400 0.0037844047882356 4.9052E-21 25.6923 1.33 * * * * MSP
J1652-48 0.0037851238 * 187.8 4.79 * * * * MSP
J1923+2515 0.003788155519 9.42E-21 18.85766 0.99 * * * * MSP
J1748-2021F 0.00379363 -1.055e-20 220.43 * 9.49757 9.83397 0.0531 0.35 MSP-GC
J1622-03 0.00385 * 10.8 * * * * * MSP
J0610-2100 0.0038613247042986 0.00001235E-15 60.6662 5.64 0.073488 0.2860160010 * 0.021397 BW-F
J1835-3259 0.003889 0 63.35 * * * * * MSP-GC
J1751-2857 0.003914873196 1.126e-20 42.808 1.44 32.528221 110.7464576 0.0001283 0.192849 MSP
J1824-2452I 0.0039318526 0 119.0 * 0.76591 0.45940754 0.0 0.174 RB-GC+AMXP
J2019+2425 0.003934524080 7.0237E-21 17.203 0.91 38.7676297 76.51163479 0.00011109 0.308635 MSP
J1937+16 0.003960 * 105.9 * 0 0 * * MSP
J1957+25 0.003960 * 44.1 * 0.283 0.238 * * MSP
B2127+11F 0.00402704 3.2e-20 65.52 * * * * * MSP-GC
J0024-7204Q 0.00403318 3.402e-20 24.29 * 1.46221 1.18908 0.000085 0.21 MSP-GC
J1824-2452J 0.004039 0 119.2 * 0.0250 0.0974 0.0 0.015 BW-GC
J0024-7204G 0.00404038 -4.215e-20 24.441 * * * * * MSP-GC
J0509+08 0.00406 * 38.3 * * * * * MSP
J1824+10 0.00407 * 59.9 * * * * * MSP
J1744-1134 0.004074545940854022 8.93496E-21 3.13908 0.42 * * * * MSP
J1853+1303 0.00409179738145616 8.7163E-21 30.5701 1.60 40.7695198 115.65378643 2.3691E-5 0.239536 MSP
J1824-2452L 0.0041 0 119.0 * 0.0570 0.22571 0.0 0.022 BW-GC
J1431-5740 0.004110543956 6.42E-21 131.46 4.07 2.269890 2.726855823 4.3E-6 0.156496 MSP
J1824-2452C 0.004159 0 120.7 * 7.356 8.078 0.847 0.30 MSP-GC
J1737-0811 0.004175017312 7.93E-21 55.311 2.38 9.332791 79.517379 5.38E-5 0.065143 MSP
J1844+0115 0.004185543936664 1.07E-20 148.22 3.45 14.173495 50.6458881 0.0002578 0.138203 MSP
J1807-2459B 0.004186 0 137.3 * 28.7895 9.95667 0.7470 1.47 MSP-GC-DNS
J1122+78 0.004200 * 11.2 * * * * * MSP
J1125+7819 0.004200 * 11.2 * 12.192 15.355 * * MSP
J1935+1726 0.004200 * 62.0 * * * * * MSP
J1748-2446W 0.00420518 0 239.14 * 5.869 4.877 0.015 0.34 MSP-GC
J1801-0857D 0.004226532003547 6.9E-21 174.71 10.60 * * * * MSP-GC
J1312+0051 0.00423 * 15.3 1.15 * 38.5 * * MSP
J2047+1053 0.00429 * 34.6 2.23 * 0.12 * 0.035 BW-F
J1950+24 0.004300 * 142.2 * * * * * MSP
J0024-7203U 0.00434283 9.523e-20 24.335 * 0.52695 0.42911 0.00015 0.14 MSP-GC
J0024-7204L 0.00434617 -1.2206e-19 24.38 * * * * * MSP-GC
J0533+67 0.00439 * 57.4 5.80 * * * * MSP
J1823-3021E 0.004394 0 91.4 * * * * * MSP-GC
J1803-3002B 0.004397 0 192.6 * * * * * MSP-GC
J1813-2617 0.004430 * 122.5 * * * * * MSP
J1748-2446ag 0.00444803 0 237.75 * * * * * MSP-GC
J1824-2452K 0.004461 0 119.8 * 2.6050 3.91034 0.00152 0.16 MSP-GC
J1850+02 0.004480 * 540.5 * * * * * MSP
J1708-3506 0.004505158948 2.3E-20 146.8 3.50 33.584233 149.13318 0.0002445 0.161026 MSP
J2051-0827 0.0045086417449716 1.2737E-20 20.7449 1.28 0.045052 0.0991102506 0.0000 0.026657 BW-F
J2042+02 0.004530 * 9.3 * * * * * MSP
J0024-7204Z 0.004554 0 24.47 * * * * * MSP-GC
J1713+0747 0.004570136525 8.5289E-21 15.9915 1.05 32.34242099 67.8251298718 0.0000749406 0.275268 MSP
J1910-5959E 0.00457177 -4.37e-19 33.29 * * * * * MSP-GC
J1643-1224 0.004621641516 1.84628E-20 62.4121 0.42 25.072614 147.01739776 50.578E-5 0.119111 MSP
J1911+1347 0.004625962465 1.712E-20 30.99 1.60 * * * * MSP
J1824-2452H 0.004629 0 121.5 * 0.7195 0.435 0.0 0.20 RB-GC
J1709+2313 0.0046311962778409 0.00000363E-15 25.3474 1.83 15.288544 22.71189238 0.0000187 0.269165 MSP
J0931-19 0.004640 * 41.5 NA NA NA NA NA MSP
B2127+11E 0.00465144 1.78e-19 66.51 * * * * * MSP-GC
J1048+23 0.004670 * 16.7 * * * * * MSP
J1239+3232 0.004700 * 16.8 * 0 0 * * MSP
J1826-24 0.00470 * 81.9 * * * * * MSP
J1748-2446D 0.00471398 0 243.83 * * * * * MSP-GC
J0024-7204X 0.004771 0 24.0 * * * * * MSP-GC
J1725-3853 0.004791822704 5E-20 158.2 3.44 * * * * MSP
B2127+11D 0.0048028 -1.075e-18 67.28 * * * * * MSP-GC
J2322+2057 0.004808428209 9.70E-21 13.372 0.78 * * * * MSP
J0024-7204V 0.00481 0 24.1 * 0.85 0.227 0.0 * MSP-GC
J1207-5050 0.00484 * 50.6 2.19 * * * * MSP
J1823-3021F 0.00485 0 86.7 * * * * * MSP-GC
J0030+0451 0.0048654532073692 1.01736E-20 4.333 0.28 * * * * MSP
J1955+2527 0.004872765862 9.12E-21 209.971 9.06 * * * * MSP
J1953+1846A 0.004888 0 117 * 0.0782 0.1766 0.0 0.032 BW-GC
J1900+0308 0.004909239016418 5.9E-21 249.898 5.27 6.716377 12.47602144 * 0.168943 MSP
J1748-2446H 0.00492589 0 238.13 * * * * * MSP-GC
J2124-3358 0.004931114940 2.05705E-20 4.601 0.30 * * * * MSP
J1748-2446ah 0.00496515 0 237.75 * * * * * MSP-GC
J1905+0154B 0.004968 0 192 * * * * * MSP-GC
J1910+1256 0.00498358394056511 9.686E-21 38.0701 1.95 21.1291036 58.466742029 2.3018E-4 0.191675 MSP
J0514-4002 0.00499058 1.17e-21 52.1489 * 36.2966 18.7852 0.88798 1.1 MSP-GC
J1748-2446R 0.00502854 0 237.60 * * * * * MSP-GC
J1142+0119 0.00507 * 19.2 2.04 * 1.58 * * MSP
J1934+22 0.00508 NA 174.1 * * * * * MSP
J1943+22 0.005080 * 174.1 NA NA NA NA NA MSP
J1748-2446ac 0.00508691 0 238.72 * * * * * MSP-GC
J1835-0114 0.005116387644239 0.7E-20 98 2.67 4.654423 6.6925427 1.1E-5 0.178042 MSP
J1748-2446ab 0.00511971 0 238.34 * * * * * MSP-GC
J1750-3703D 0.005139936774902 4.928E-19 230.09 11.70 * * * * MSP-GC
J1024-0719 0.005162204637 1.852E-20 6.48520 0.49 * * * * MSP
J1944+0907 0.0051852019041260 1.713E-20 24.34 1.28 * * * * MSP
J2302+4442 0.005192324646 13.3E-21 13.762 0.75 51.429942 125.935292 0.00050328 0.291704 MSP
J2010-1323 0.005223271015 0.482E-20 22.160 1.29 * * * * MSP
J1701-3006A 0.00524157 -1.3196e-19 115.03 * 3.48372 3.80595 0.00000 0.23 MSP-GC
J1012+5307 0.005255749014 1.71342E-20 9.0233 0.70 0.5818172 0.60467271355 * 0.107084 MSP
J1911-6000C 0.00527733 2.2e-21 33.21 * * * * * MSP-GC
J1732-5049 0.00531255028907845 1.4207E-20 56.822 1.81 3.9828705 5.262997206 8.7E-6 0.178890 MSP
J0024-7204D 0.00535757 -3.429e-21 24.729 * * * * * MSP-GC
B1855+09 0.005362 1.784055E-20 13.300 0.90 9.2307805 12.32719 2.170E-5 0.241445 MSP
J1911+0101B 0.00538432 -2e-21 196.69 * * * * * MSP-GC
J1824-2452E 0.00542 0 119.8 * * * * * MSP-GC
B1820-30A 0.00544 3.385e-18 86.8 * * * * * MSP-GC
J1342+2822D 0.005443 0 26.34 * 38.524 128.752 0.0753 0.21 MSP-GC
J1843-1442 0.005470 * 114.6 * * * * * MSP
J0711-6830 0.00549096850013900 1.49067E-20 18.4066 1.04 * * * * MSP
J1748-2446F 0.00554014 0 239.18 * * * * * MSP-GC
J1120-3618 0.005550 * 45.1 * * * * * MSP
B1516+02A 0.00555359 4.122e-20 30.08 * * * * * MSP-GC
J0023-7204C 0.00575678 -4.985e-20 24.599 * * * * * MSP-GC
J0437-4715 0.005757451924362137 5.729370E-20 2.64476 0.16 3.36669708 5.74104646 1.9180E-5 0.140287 MSP
J1748-2446aa 0.00578804 0 237.42 * * * * * MSP-GC
J1719-1438 0.0057901517700238 8.043E-21 36.862 1.64 0.0018212 0.0907062900 0.0008 0.001129 MSP-
J1453+1902 0.005792302734 1.162E-20 14.049 0.95 * * * * MSP
J1803-3002C 0.00584 0 194.5 * * * * * MSP-GC
J1646-2142 0.00585 * 29.8 1.41 * 23 * * MSP
J1738+0333 0.0058500957646929 2.409E-20 33.778 1.97 0.343430 0.3547907344 4.0E-6 0.089458 MSP
J1824-2452G 0.005909 0 119.4 * 0.0165 0.1046 0.0 0.011 BW-GC
J2033+17 0.0059489575 1.1E-20 25.2 1.38 20.163 56.308 0.00013 0.187192 MSP
J1629-6902 0.006000603443 1.00E-20 29.490 1.36 * * * * MSP
J1750-3703B 0.00607454 1.92e-20 234.391 * 2.8659 3.60511 0.00404 0.19 MSP-GC
J1748-2446S 0.00611664 0 236.26 * * * * * MSP-GC
B1953+29 0.006133166510 2.9720E-20 104.501 5.39 31.4126903 117.34909728 3.3025E-4 0.178033 MSP
B1257+12 0.006218531948 1.143341E-19 10.16550 0.60 0.0000030 25.262 0.0 0.000000 MSP-planet
J1748-2021C 0.00622693 -5.984e-20 226.95 * * * * * MSP-GC
J1552-4937 0.006280 * 114.6 * * * * * MSP
J1824-2452B 0.006547 0 119.5 * * * * * MSP-GC
B2127+11H 0.00674339 2.4e-20 67.15 * * * * * MSP-GC
J2236-5527 0.006907549392921 9.6E-21 20.0 2.03 8.775877 12.68918715 5.02E-5 0.223460 MSP
J1748-2446T 0.00708491 0 237.70 * * * * * MSP-GC
J1549-06 0.00709 * 21.6 1.46 * * * * MSP
J1551-0658 0.007090 * 21.6 * 4.331 5.207 * * MSP
J1803-30 0.007101 0 192 * * * * * MSP-GC
J1801-0857A 0.007176 0 183.0 * * * * * MSP-GC
J1801-3210 0.007453584373 0.265E-20 176.7 5.05 7.809320 20.7716995 3.0E-6 0.137926 MSP
J1045-4509 0.007474224226 1.76603E-20 58.1662 0.23 3.0151325 4.0835292547 2.37E-5 0.158989 MSP
J0024-7204T 0.007588479807364 2.9374E-19 24.39 4.00 1.33850 1.126176767 0.00040 0.167186 MSP-GC
J1405-4656 0.0076 13.9 * * * * * * MSP
J1701-3006C 0.00761285 -3.189e-20 114.56 * 0.19288 0.21500 <0.00006 0.08 MSP-GC
J2129-04 0.00762 * 16.9 1.03 * * * 0.37 RB-F
J1918-0642 0.00764587288390884 2.56944E-20 26.554 1.40 8.3504716 10.9131777486 1.991E-5 0.236399 MSP
J1902+03 0.007790 * 253.7 * * * * * MSP
J1546-59 0.00780 * 168.3 4.67 * * * * MSP
B1516+02B 0.00794694 -3.3e-21 29.47 * 3.04859 6.85845 0.13784 0.13 MSP-GC
J1455-3330 0.007987204796261 2.428E-20 13.5708 0.74 32.362222 76.1745676 0.0001700 0.252541 MSP
J1730-2304 0.00812279804398456 2.01836E-20 9.617 0.51 * * * * MSP
J1910-5959B 0.0083578 -7.99e-19 33.28 * * * * * MSP-GC
J1748-2446C 0.0084361 -6.06e-19 237 * * * * * MSP-GC
J1529-3828 0.00848628211574 2.70E-20 73.62 4.85 29.34054 119.674809 1.686E-4 0.163053 MSP
J1528-3828 0.008490 * 73.6 * 10.645 11.516 * * MSP
J1953+67 0.008570 * 57.0 * * * * * MSP
J1748-2446N 0.0086669 0 238.47 * 1.619 0.3855 0.000045 0.56 MSP-GC
J0645+51 0.00885 * 18.2 * * * * * MSP
J1757-5322 0.008869961227277 2.63E-20 30.817 1.36 2.086527 0.4533112381 4.0E-6 0.556733 MSP
J1910-5959D 0.00903529 9.63e-19 33.32 * * * * * MSP-GC
J1804-2717 0.009343030685703 4.089E-20 24.674 1.17 7.28145 11.1287115 3.5E-5 0.200373 MSP
J1435-6100 0.009347972210248 2.45E-20 113.7 3.25 6.184023 1.3548852170 1.05E-5 0.883724 MSP
J1337-6423 0.009423406713 2.0E-19 260.32 6.30 13.086499 4.78533407 2.00E-5 0.781589 MSP
J1748-2446I 0.00957019 0 238.73 * 1.818 1.328 0.428 0.24 MSP-GC
J0922-52 0.00968 * 122.4 3.76 * * * * MSP
J1748-3009 0.009684273 * 420.2 5.96 1.32008 2.9338198 * 0.083871 MSP
J0824+00 0.009860 * 34.6 * * * * * MSP
B1639+36A 0.0103775 0 30.36 * * * * * MSP-GC
J2140-2310A 0.0110193 -5.181e-20 25.0640 * 0.23494 0.17399 <0.00012 0.11 RB-GC
B1620-26 0.0110758 -5.4693e-20 62.8633 * 64.8095 191.443 0.02532 0.33 MSP-GC-planet
J0900-3144 0.0111096491573889 0.00004912E-15 75.702 0.82 17.248811 18.73763576 1.03E-5 0.357699 MSP
J1525-5544 0.0114 * 126.8 * * * * * MSP
J1748-2446A 0.0115632 -3.4e-20 242.1 * 0.11971 0.07565 0.0 0.10 RB-GC
J1618-39 0.011987313 * 117.5 4.76 10.24 22.8 * 0.172595 MSP
J1802-2124 0.0126475935865227 7.256E-20 149.6258 3.33 3.7188533 0.698889243381 2.47E-6 0.807308 MSP
J1755-3715 0.0128 * 167.4 * * * * * MSP
J2140-2310B 0.013 0 25.09 * >0.1 >0.8 >0.52 >0.02 MSP-GC
J1949+3106 0.013138183343 9.3913E-20 164.1264 7.78 7.288650 1.949535 0.00004306 0.795580 MSP
J1748-2021D 0.0134958 5.8678e-19 224.98 * 0.3972 0.28607 0.00 0.14 RB-GC
J1603-7202 0.014841952249 1.56296E-20 38.0471 1.64 6.8806610 6.3086296703 9.55E-6 0.286590 MSP
J0721-2038 0.01554 * 76.1 9.379 5.461 * * * MSP
J2145-0750 0.01605242391433660 2.97848E-20 8.9977 0.57 10.1641080 6.83893 1.930E-5 0.423197 MSP
J1748-2021E 0.016264003411125 3.124E-19 224.10 8.40 * * * * MSP-GC
J1022+1001 0.016452929950 4.3344E-20 10.2521 0.52 16.7654074 7.8051302826 9.700E-5 0.705295 MSP
J1748-2021B 0.0167601 -3.2913e-19 220.922 * 4.46699 20.5500 0.57016 0.090 MSP-GC
J1914+07 0.018510 * 224.7 * * * * * MSP
J1753-28 0.018620 * 298.4 * * * * * MSP
J1745-0952 0.019376303441 9.246E-20 64.474 2.38 2.378599 4.943453386 9.8E-6 0.107915 MSP
J1952+2630 0.020732360562672 4.2721E-18 315.338 13.67 2.798196 0.39187863896 4.09E-5 0.925732 MSP
J1748-2446ai 0.0212284 0 233.9 * 2.8088 0.85088 0.4400 0.57 MSP-GC
J1933+17 0.021510 * 156.6 * 13.674 5.156 * * MSP
J1748-2446G 0.0216719 0 237.57 * * * * * MSP-GC
J0737-3039A 0.0226993785996239 1.75993E-18 48.920 1.10 1.415032 0.10225156248 0.0877775 1.254327 MSP-DNS
B1802-07 0.0231009 4.7e-19 186.38 * 3.92059 2.61676 0.21206 0.35 MSP-GC
J1622-6617 0.023623444739 6.4E-20 87.94 4.66 0.979380 1.640635183 8.0E-6 0.092021 MSP
J2007+2722 0.024497388545933 9.611E-19 127.0 6.85 * * * * MSP
J0407+1607 0.025701739194 7.9E-20 35.65 4.07 106.45026 669.0704 0.0009368 0.190025 MSP
J1056-7117 0.0263096769824 6.3E-20 93.04 5.27 4.14855 9.1387994 1.3E-5 0.125985 MSP
J1750-3703C 0.0265687 -9.96e-19 230.67 * * * * * MSP-GC
J1502-6752 0.026744423767 2.9E-19 151.75 11.57 0.31756 2.4844570 6.6E-5 0.021887 MSP
J1726-2946 0.027080 * 60.9 * * * * * MSP
J1756-2251 0.028461588454 1.0171E-18 121.18 2.92 2.7564 0.319633898 0.180567 1.096102 MSP-DNS
J1439-5501 0.028634888190 1.418E-19 14.56 0.76 9.833404 2.117942520 4.99E-5 1.113745 MSP
J1038+0032 0.02885155795131 0.000067E-15 26.59 2.36 * * * * MSP
J0621+1002 0.028853860730 4.732E-20 36.6010 1.88 12.0320744 8.3186813 0.00245744 0.442896 MSP
J1801-0857B 0.0289616 0 181.94 * 34.2866 56.7893 0.034 0.40 MSP-GC
J1841+0130 0.0297727753332 8.17E-18 125.88 3.19 3.50409 10.471626 8.2E-5 0.095854 MSP
SAXJ1808.4-3658 0.00249377 6.2e-21 * * 0.0628 0.08375 * 0.043 AMXP
XTEJ1751-305 0.00229885 2.9e-20 * * 0.010 0.0295833 * 0.014 AMXP
XTEJ0929-314 0.00540541 * * * 0.00599 0.0304167 * 0.0083 AMXP
XTEJ1807-294 0.00526316 * * * 0.0048 0.0279167 * 0.0066 AMXP
XTEJ1814-338 0.00318471 * * * 0.3906 0.177917 * 0.17 AMXP
IGRJ00291+5934 0.00166945 8.3e-21 * * 0.065 0.1025 * 0.039 AMXP
HETEJ1900.1-2455 0.00265252 * * * 0.0184 0.0541667 * 0.016 AMXP
SwiftJ1756.9-2508 0.00549451 <6e-20 * * 0.00597 0.0404167 * 0.007 AMXP
AqlX-1 0.00181818 * * * A1 0.7875 * 0.6 AMXP
SAXJ1748.9-2021 0.00226244 * * * 0.388 0.365417 * 0.1 AMXP
NGC6440X-2 0.00485437 * * * 0.00622 0.0395833 * 0.0067 AMXP
IGRJ17511-3057 0.00408163 * * * 0.275 0.144583 * 0.13 AMXP
SwiftJ1749.4-2807 0.0019305 * * * 1.90 0.3675 * 0.59 AMXP
IGRJ17498-2921 0.00249377 * * * 0.365 0.16 * 0.17 AMXP

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Lightweight and Supermassive Black Holes Hidden in Galaxies

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In the past few days there have been two interesting astrophysics news about black holes. The first one is about a super-massive black hole discovered in an ultra-compact dwarf galaxy. Such galaxies are tiny (both in mass and size) when compared to our Milky Way. The galaxy M60-UCD1 (where UCD is the acronym of Ultra-Compact-Dwarf) is a lightweight object made by “only” 150 million solar masses, to be compared with our Milky Way with a mass of 1,250 billion solar masses. The galaxy has also a small radius, a few hundred light years across, whereas our galaxy extends for tens of thousands light years.

Despite its tiny size, this ultra-compact dwarf galaxy contains a super-massive black hole in its center, and a quite peculiar one: its mass is about 20 million solar masses, about 5 times bigger than the super-massive black hole in the center of the Milky Way. The mass of this black hole is not particularly remarkable, as we already know many supermassive black holes well more massive than this one (even a thousand times more massive). However, the discovery is quite extraordinary for two reasons. The first is that the black hole mass constitutes about 15% of the total galaxy mass, which is an absolute record-breaker. Again, for comparison, the super-massive black hole in our galaxy contains slightly more than 0.0003% of the total mass of the Milky Way, whereas in other galaxies the typical value is about 0.5%, still way below the 15% of the new record-holder. Second, this is the first ultra-compact dwarf galaxy discovered to contain a supermassive black hole, meaning that many other similar galaxies might contain one as well. This discovery doubles the current total estimate of supermassive black holes in the Universe.

The second news is also about black holes but not of the supermassive kind. The black hole in question was born after a supernova explosion of a massive star. An international team of researches has proposed that a previously known galactic X-ray binary, named Swift J1753.5–0127, might contain the lightest black hole known to date. According to the theory of General Relativity there is no true lower limit to the mass of a black hole. Indeed anything can turn into such an object when sufficiently squeezed (e.g., your body can turn into a black hole if you compress it down to a radius of, well… 0.0000000000000000000000001 meters). However, since astrophysical black holes form in massive stellar explosions, there is a specific channel of formation that allows only a certain mass range. E.g., a light black hole cannot be created because the gravitational pull will not be sufficient to overcome the nuclear forces emerging during the compression process. When this happens the gravitational collapse is stopped and a neutron star is formed in place of the black hole.

Theoretical calculations show that the minimum astrophysical black hole mass is about 2-3 solar masses, but the minimum mass ever measured for a black hole is approximately 5 solar masses. The reason for the existence of this mass gap between about 2 and 5 solar masses is not established yet, but it might have important implications for our understanding of supernova explosions. Indeed, in the past decade it has been proposed that the energy liberated in a supernova depends on the mass of the exploding star. Such energy might suddenly diminish when the star becomes sufficiently massive to form a black hole remnant. If the energy of the supernova is too low in massive stars, as this model suggests, then a large fraction of the stellar mass will not be expelled during the explosion and a minimum mass budget will always be present during the gravitational collapse. Such mass budget is set at the observed value of about 5 solar masses.

New observations of Swift J1753.5-0127, performed at various optical observatories, among which the Hubble Space Telescope, show that the stellar companion in the binary wobbles as if the black hole weight is below 5 solar masses. The estimated most probable mass is about 4 solar masses. If confirmed this might be the lightest black hole mass measured so far and would induce astronomers to reconsider the existence of a mass gap. This in turn might mean that either the energy of supernovae does not change much with the mass of the exploding star or that black holes in the mass-gap form in a way different than the gravitational collapse that follows supernovae explosions.

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