Table 5
Dispersion measures of detected MSPs in the frequency range 110–188 MHz.
| PSR | Catalogue | LOFAR | ΔDM | δDMorb | DMTempo2 | DMpdmp | τ scat | |||||
| DMref | Epoch | Ref | DMHBA | Epoch | Span | N obs | (pc cm-3) | (10-3 pc cm-3) | (pc cm-3) | (pc cm-3) | (μs) | |
| (pc cm-3) | (MJD) | (pc cm-3) | (MJD) | (days) | ||||||||
|
|
||||||||||||
| J0030+0451 | 4.333(1) | 50 984.40 | 1 | 4.3326(2) | 56 371.00 | 154.6 | 6 | + 0.0004(10) | – | 4.332613(14) | 4.3326(1) | 1.7 |
| J0034−0534 | 13.76517(4) | 50 690.00 | 2 | 13.76508(17) | 56 367.52 | 161.6 | 6 | + 0.00009(17) | 0.906 | 13.765034(7) | 13.76498(8) | 60 |
| J0214+5222 | 22.0354(34) | 55 974.00 | 6 | 22.03644(24) | 56 716.60 | 139.6 | 6 | −0.0010(34) | 0.549 | 22.0361(1) | 22.035(2) | 310 |
| J0218+4232 | 61.252(5) | 50 864.00 | 3 | 61.23889(32) | 56 473.30 | – | 1 | + 0.013(5) | 4.357 | 61.2389(3) | 61.2395(3) | 2430 |
| J0337+1715 | 21.3162(3) | 55 920.00 | 4 | 21.319(1) | 56512.23 | – | 1 | −0.0028(10) | 1.159 | – | 21.319(1) | 290 |
| J0407+1607 | 35.65(2) | 52 799.00 | 20 | 35.61091(17) | 56790.52 | – | 1 | + 0.04(2) | 0.413 | 35.61091(17) | 35.6105(9) | 780 |
| J0621+1002 | 36.6010(6) | 50 944.00 | 5 | 36.522(8) | 56 375.26 | 172.5 | 6 | + 0.079(8) | 3.859 | 36.5349(81) | 36.5377(63) | 1110 |
| J0636+5129 | 11.10598(6) | 56 307.00 | 6 | 11.1068(31) | 56 700.88 | 105.7 | 2 | −0.0008(31) | 0.109 | 11.10647(21) | 11.1064(3) | 80 |
| J0645+5158 | 18.247536(9) | 56 143.00 | 6 | 18.24847(12) | 56 552.87 | 461.7 | 9 | −0.00093(12) | – | 18.24846(15) | 18.2485(6) | 260 |
| J0737−3039A | 48.920(5) | 53 156.00 | 7 | 48.9179(55) | 56 321.94 | – | 1 | + 0.002(7) | 53.73 | 48.9179(55) | 48.915(12) | 0.4 |
| J0751+1807 | 30.2489(3) | 51 800.00 | 8 | 30.244(1) | 56 288.03 | 16.0 | 2 | + 0.005(1) | 3.316 | 30.2434(5) | 30.2425(15) | 590 |
| J1012+5307 | 9.0233(2) | 50 700.00 | 9 | 9.02433(8) | 56357.49 | 154.6 | 6 | −0.00103(22) | 0.631 | 9.024355(76) | 9.0245(2) | 40 |
| J1022+1001 | 10.2521(1) | 53 589.00 | 10 | 10.2530(24) | 56 357.46 | 154.6 | 5 | −0.0009(24) | 1.601 | 10.25327(16) | 10.2533(1) | 50 |
| J1023+0038 | 14.325(10) | 54 802.00 | 11 | 14.3309(2) | 56 308.15 | 14.0 | 2 | −0.006(10) | 1.805 | 14.3311(2) | 14.3315(1) | 90 |
| J1024−0719 | 6.48520(8) | 53 000.00 | 10 | 6.48447(14) | 56 357.46 | 154.6 | 4 | + 0.00073(16) | – | 6.48446(25) | 6.4846(4) | 5.6 |
| J1038+0032 | 26.59(20) | 53 000.00 | 30 | 26.312(2) | 56 782.80 | – | 1 | + 0.28(20) | – | 26.3121(22) | 26.3069(55) | 330 |
| J1231−1411 | 8.090(1) | 55 100.00 | 27 | 8.09100(54) | 56 789.86 | – | 1 | −0.001(1) | 0.646 | 8.09100(54) | 8.0908(11) | 20 |
| B1257+12 | 10.16550(3) | 49 750.00 | 12 | 10.15397(13) | 56 366.55 | 172.5 | 6 | + 0.0115(1) | < 10-7 | 10.15405(11) | 10.1542(1) | 20 |
| J1453+1902 | 14.049(4) | 53 337.00 | 31 | 14.0569(16)‡ | 56 779.99 | – | 1 | −0.0079(43) | – | – | 14.0569(16) | 90 |
| J1544+4937 | 23.2258(1) | 56 007.00 | 32 | 23.227(1) | 56 780.00 | – | 1 | −0.0012(10) | 0.460 | 23.227(1) | 23.2277(5) | 240 |
| J1640+2224 | 18.4260(8) | 51 700.00 | 13 | 18.42765(12) | 56 366.68 | 172.6 | 7 | −0.00165(81) | 0.423 | 18.427656(5) | 18.4280(2) | 170 |
| J1709+2313 | 25.3474(2) | 51 145.00 | 33 | 25.3416(24)‡ | 56 964.53 | – | 1 | + 0.0058(24) | 1.241 | – | 25.3416(24) | 320 |
| J1713+0747 | 15.9915(2) | 52 000.00 | 14 | 15.9907(6) | 56 424.60 | 286.3 | 10 | + 0.0008(6) | 0.555 | 15.99044(35) | 15.9909(5) | 120 |
| J1730−2304 | 9.617(2) | 53 300.00 | 14 | 9.62314(4) | 56 473.94 | 33.9 | 2 | −0.006(2) | – | 9.6232(4) | 9.6233(6) | 50 |
| J1738+0333 | 33.778(9) | 52 500.00 | 15 | 33.7754(11) | 56369.21 | 175.5 | 7 | + 0.0026(91) | 2.378 | 33.77481(44) | 33.7747(13) | 640 |
| J1744−1134 | 3.13908(4) | 53 742.00 | 10 | 3.13808(14) | 56353.78 | 144.6 | 6 | + 0.0010(1) | – | 3.13815(8) | 3.1383(2) | <1 |
| J1810+1744 | 39.659298(52) | 55 520.78 | 34 | 39.66041(28) | 56349.31 | 135.6 | 6 | −0.0011(3) | 1.828 | 39.6600(2) | 39.66050(3) | 620 |
| J1816+4510 | 38.8874(4) | 56 047.00 | 6 | 38.88972(13) | 56713.83 | 136.7 | 5 | −0.0023(4) | 4.666 | 38.8897(1) | 38.8905(2) | 580 |
| J1853+1303 | 30.5701(6) | 54 000.00 | 17 | 30.57121(17) | 56384.24 | 145.6 | 2 | −0.0011(6) | 0.784 | 30.57140(46) | 30.5691(9) | 130 |
| B1855+09 | 13.300(4) | 50 481.00 | 14 | 13.30482(89) | 56366.29 | 169.5 | 7 | −0.0048(41) | 0.724 | 13.3047(4) | 13.3042(15) | 100 |
| J1905+0400 | 25.6923(12) | 53 700.00 | 17 | 25.68947(24) | 56964.66 | – | 1 | + 0.0028(12) | – | 25.68947(24) | 25.6885(38) | 130 |
| J1911−1114 | 30.9750(9) | 50 458.00 | 18 | 30.96909(69) | 56368.80 | 164.5 | 5 | + 0.0059(11) | 1.462 | 30.96904(43) | 30.9690(6) | 560 |
| J1918−0642 | 26.554(10) | 53 400.00 | 19 | 26.590(6) | 56388.75 | 204.4 | 3 | −0.036(12) | 1.477 | 26.5913(11) | 26.5952(27) | 310 |
| J1923+2515 | 18.85766(19) | 55 322.00 | 20 | 18.85561(5) | 56387.77 | 138.6 | 2 | + 0.00205(20) | – | 18.85567(12) | 18.8557(2) | 40 |
| B1937+21 | 71.0398(2) | 47 899.50 | 21 | 71.024(1) | 56385.37 | 253.2 | 3 | + 0.016(1) | – | 71.02373(55) | 71.0252(1) | 2960 |
| J1944+0907 | 24.34(2) | 52 913.00 | 22 | 24.36079(38) | 56384.27 | 145.6 | 2 | −0.02(2) | – | 24.3611(6) | 24.3611(7) | 80 |
| B1953+29 | 104.501(3) | 54 500.00 | 17 | 104.5263(26) | 56384.27 | 145.6 | 2 | −0.025(4) | 2.035 | 104.523(1) | 104.5202(25) | 8100 |
| B1957+20 | 29.1168(7) | 48 196.00 | 23 | 29.12151(34) | 56322.45 | 71.8 | 4 | −0.0047(8) | 0.494 | 29.12143(13) | 29.12130(12) | 110 |
| J2019+2425 | 17.203(5) | 50 000.00 | 24 | 17.1959(14) | 56401.26 | 179.5 | 3 | + 0.007(5) | 0.634 | 17.19544(84) | 17.1952(7) | 40 |
| J2043+1711 | 20.70987(3) | 55 400.00 | 25 | 20.7121(1) | 56384.33 | 145.6 | 3 | −0.0022(1) | 1.650 | 20.71232(19) | 20.7124(3) | 50 |
| J2051−0827 | 20.7449(4) | 51 000.00 | 26 | 20.7299(17) | 56387.81 | 138.6 | 2 | + 0.015(2) | 0.686 | 20.73016(17) | 20.73120(35) | 150 |
| J2145−0750 | 8.9977(14) | 53 040.00 | 14 | 9.00401(13) | 56367.40 | 161.6 | 7 | −0.0063(14) | 0.973 | 9.00401(4) | 9.00380(13) | 10 |
| J2214+3000 | 22.557(1) | 55 100.00 | 27 | 22.5448(22) | 56404.82 | 172.5 | 3 | + 0.0122(24) | 0.233 | 22.5431(42) | 22.5507(9) | 90 |
| J2215+5135 | 69.2 | 55 135(30) | 16 | 69.1976(15) | 56404.84 | 172.5 | 2 | + 0.0024(15) | 13.14 | 69.1959(7) | 69.1972(2) | 3010 |
| J2235+1506 | 18.09(5) | 49 250.00 | 28 | 18.10352(56) | 56521.02 | – | 1 | −0.014(50) | – | 18.10352(56) | 18.1037(20) | 90 |
| J2302+4442 | 13.762(6) | 55 000.00 | 29 | 13.7268(1) | 56385.90 | 148.6 | 2 | + 0.035(6) | 0.409 | 13.72662(34) | 13.7274(5) | 20 |
| J2317+1439 | 21.907(3) | 49 300.00 | 28 | 21.89873(14) | 56367.48 | 161.5 | 6 | + 0.008(3) | 1.499 | 21.89876(26) | 21.8991(1) | 60 |
| J2322+2057 | 13.372(5) | 48 900.00 | 24 | 13.38574(25) | 56475.68 | 30.9 | 2 | −0.014(5) | – | 13.3853(8) | 13.3859(9) | 30 |
Notes. Nobs is the number of observations within the given span (Col. 7) used for calculation of DMHBA; ΔDM is the DM offset between the reference catalogue DM value, DMref, and LOFAR’s DM measurement, DMHBA, i.e. ΔDM = DMref − DMHBA; δDMorb = vorb/c × DM is conservative upper limit on “artificial” DM orbital vatiations for binary MSPs (see text); DMTempo2 and DMpdmp are DM measurements for the best individual observation using Tempo2 and pdmp, respectively; τscat is the predicted scattering time at 150 MHz from the NE2001 model (Cordes & Lazio 2002) scaled from 1 GHz using a Kolmogorov spectrum of electron density inhomogeneities.
Reference. (1) Abdo et al. (2009); (2) Abdo et al. (2010); (3) Hobbs et al. (2004b); (4) Ransom et al. (2014); (5) Splaver et al. (2002); (6) Stovall et al. (2014a); (7) Kramer et al. (2006b); (8) Nice et al. (2005); (9) Lange et al. (2001); (10) Hotan et al. (2006); (11) Archibald et al. (2009); (12) Konacki & Wolszczan (2003); (13) Löhmer et al. (2005); (14) Verbiest et al. (2009); (15) Jacoby (2005); (16) Hessels et al. (2011); (17) Gonzalez et al. (2011); (18) Toscano et al. (1999); (19) Janssen et al. (2010); (20) Lynch et al. (2013); (21) Cognard et al. (1995); (22) Champion et al. (2005); (23) Arzoumanian et al. (1994); (24) Nice et al. (1993); (25) Guillemot et al. (2012); (26) Doroshenko et al. (2001); (27) Ransom et al. (2011); (28) Camilo et al. (1993); (29) Cognard et al. (2011); (30) Burgay et al. (2006); (31) Lorimer et al. (2007); (32) Bhattacharyya et al. (2013); (33) Lewandowski et al. (2004); (34) J. Hessels (priv. comm.).
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