2016A&A...585A.128K

Query : 2016A&A...585A.128K

2016A&A...585A.128K - Astronomy and Astrophysics, volume 585A, 128-128 (2016/1-1)

A LOFAR census of millisecond pulsars.

KONDRATIEV V.I., VERBIEST J.P.W., HESSELS J.W.T., BILOUS A.V., STAPPERS B.W., KRAMER M., KEANE E.F., NOUTSOS A., OSLOWSKI S., BRETON R.P., HASSALL T.E., ALEXOV A., COOPER S., FALCKE H., GRIESSMEIER J.-M., KARASTERGIOU A., KUNIYOSHI M., PILIA M., SOBEY C., TER VEEN S., VAN LEEUWEN J., WELTEVREDE P., BELL M.E., BRODERICK J.W., CORBEL S., EISLOEFFEL J., MARKOFF S., ROWLINSON A., SWINBANK J.D., WIJERS R.A.M.J., WIJNANDS R. and ZARKA P.

Abstract (from CDS):

We report the detection of 48 millisecond pulsars (MSPs) out of 75 observed thus far using the LOw-Frequency ARray (LOFAR) in the frequency range 110-188MHz. We have also detected three MSPs out of nine observed in the frequency range 38-77MHz. This is the largest sample of MSPs ever observed at these low frequencies, and half of the detected MSPs were observed for the first time at frequencies below 200MHz. We present the average pulse profiles of the detected MSPs, their effective pulse widths, and flux densities and compare these with higher observing frequencies. The flux-calibrated, multifrequency LOFAR pulse profiles are publicly available via the European Pulsar Network Database of Pulsar Profiles. We also present average values of dispersion measures (DM) and discuss DM and profile variations. About 35% of the MSPs show strong narrow profiles, another 25% exhibit scattered profiles, and the rest are only weakly detected. A qualitative comparison of the LOFAR MSP profiles with those at higher radio frequencies shows constant separation between profile components. Similarly, the profile widths are consistent with those observed at higher frequencies, unless scattering dominates at the lowest frequencies. This is very different from what is observed for normal pulsars and suggests a compact emission region in the MSP magnetosphere. The amplitude ratio of the profile components, on the other hand, can dramatically change towards low frequencies, often with the trailing component becoming dominant. As previously demonstrated this can be caused by aberration and retardation. This data set enables high-precision studies of pulse profile evolution with frequency, dispersion, Faraday rotation, and scattering in the interstellar medium. Characterising and correcting these systematic effects may improve pulsar-timing precision at higher observing frequencies, where pulsar timing array projects aim to directly detect gravitational waves.

Abstract Copyright: ∼

Journal keyword(s): telescopes - radio continuum: stars - stars: neutron - pulsars: general

Simbad objects: 79

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Number of rows : 79
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 PSR J0023+0923 Psr 00 23 16.890 +09 23 24.18           ~ 108 0
2 PSR J0030+0451 Psr 00 30 27.4277 +04 51 39.710           ~ 462 1
3 PSR J0034-05 Psr 00 34 21.8281 -05 34 36.620           ~ 182 0
4 PSR J0214+5222 Psr 02 14 55.2713 +52 22 40.950           ~ 14 0
5 PSR J0218+42 Psr 02 18 06.3604 +42 32 17.365           ~ 336 2
6 PSR J0337+1715 Psr 03 37 43.8210968640 +17 15 14.886499572           ~ 97 0
7 PSR J0340+41 Psr 03 40 23.2887 +41 30 45.300           ~ 75 0
8 PSR J0407+16 Psr 04 07 54.939 +16 07 16.40           ~ 31 1
9 PSR J0437-47 Psr 04 37 15.7994581776 -47 15 08.544351636           DC 906 0
10 PSR B0613-02.0 Psr 06 13 43.9759 -02 00 47.228           ~ 269 1
11 PSR J0621+10 Psr 06 21 22.11108 +10 02 38.7410           ~ 118 1
12 PSR J0636+5129 Psr 06 36 04.84645 +51 28 59.9625           ~ 71 0
13 PSR J0645+5158 Psr 06 45 59.08191 +51 58 14.9210           ~ 49 0
14 PSR J0737-3039A Psr 07 37 51.24720 -30 39 40.6700           ~ 280 1
15 PSR J0737-3039 Psr 07 37 51.248 -30 39 40.83           ~ 417 1
16 PSR J0751+1807 Psr 07 51 09.1539 +18 07 38.335           ~ 289 1
17 PSR J1012+5307 Psr 10 12 33.4345449600 +53 07 02.548542576     19.5     DA 379 1
18 PSR J1022+10 Psr 10 22 58.011 +10 01 52.85           ~ 231 2
19 PSR J1023+0038 Psr 10 23 47.6841824712 +00 38 41.005893516     17.31     GV 397 0
20 PSR J1025-07 Psr 10 24 38.6991893112 -07 19 19.045523388     19.81 18.78 18.00 ~ 241 1
21 PSR J1038+0032 Psr 10 38 26.93 +00 32 43.6           ~ 14 0
22 PSR J1231-1411 Psr 12 31 11.3069 -14 11 43.628           ~ 113 0
23 PSR B1257+12 Psr 13 00 03.1075 +12 40 55.155           ~ 517 1
24 PSR J1327-0755 Psr 13 27 57.5880 -07 55 29.800           ~ 18 0
25 PSR J1400-1431 Psr 14 00 37.00370 -14 31 47.0422           ~ 36 0
26 PSR J1453+1902 Psr 14 53 45.7175 +19 02 12.224           ~ 28 1
27 PSR J1455-3300 Psr 14 55 47.969872 -33 30 46.38030           ~ 141 1
28 PSR J1544+4937 Psr 15 44 04.166 +49 37 57.45           ~ 67 1
29 PSR J1551-0658 Psr 15 51 07.215 -06 58 06.51           ~ 8 0
30 PSR J1600-3053 Psr 16 00 51.903339 -30 53 49.37555           ~ 173 0
31 PSR J1614-2230 Psr 16 14 36.5070 -22 30 31.207           ~ 393 1
32 PSR B1620-26 Psr 16 23 38.2218 -26 31 53.769     21.30     ~ 295 2
33 PSR J1640+2224 Psr 16 40 16.744850 +22 24 08.84119           ~ 178 0
34 PSR J1643-1224 Psr 16 43 38.2 -12 25 00           ~ 215 1
35 PSR J1646-2142 Psr 16 46 18.127 -21 42 08.96           ~ 12 0
36 PSR J1709+2313 Psr 17 09 05.792 +23 13 27.85           ~ 34 1
37 PSR J1713+0747 Psr 17 13 49.5331917 +07 47 37.492580           ~ 466 1
38 PSR J1719-14 Psr 17 19 10.073 -14 38 00.96           ~ 70 2
39 PSR J1721-2457 Psr 17 21 05.496 -24 57 06.10           ~ 31 0
40 PSR J1730-2304 Psr 17 30 21.6483 -23 04 31.400           ~ 156 1
41 PSR J1738+0333 Psr 17 38 53.966386 +03 33 10.87200           ~ 156 1
42 PSR B1737+13 Psr 17 40 07.3455 +13 11 56.690           ~ 175 0
43 PSR J1741+1351 Psr 17 41 31.1499024 +13 51 44.279709           ~ 95 0
44 PSR J1744-1134 Psr 17 44 29.4172 -11 34 54.710           ~ 271 1
45 PSR J1745+1017 Psr 17 45 33.8371 +10 17 52.523           ~ 47 0
46 PSR J1751-2857 Psr 17 51 32.69322 -28 57 46.5190           ~ 50 1
47 PSR J1804-27 Psr 18 04 21.13307 -27 17 31.3370           ~ 76 1
48 PSR J1810+17 Psr 18 10 37.2791131488 +17 44 37.425884136           ~ 114 0
49 PSR J1816+4510 Psr 18 16 35.9342957160 +45 10 33.917516328           ~ 98 0
50 PSR J1828+0625 Psr 18 28 28.030 +06 25 00.52           ~ 10 0
51 PSR J1832-0836 Psr 18 32 27.5940 -08 36 54.969           ~ 61 0
52 PSR J1853+1303 Psr 18 53 57.3183 +13 03 44.088           ~ 87 1
53 PSR B1855+09 Psr 18 57 36.390620 +09 43 17.20712           DA 530 1
54 PSR J1903+0327 Psr 19 03 05.7937 +03 27 19.222           ~ 159 1
55 PSR J1905+0400 Psr 19 05 28.2736 +04 00 10.922           ~ 21 0
56 PSR J1910+1256 Psr 19 10 09.701454 +12 56 25.48680           ~ 87 1
57 PSR J1911-11 Psr 19 11 49.2927 -11 14 22.330           ~ 76 1
58 PSR J1911+1347 Psr 19 11 55.204694 +13 47 34.38383           ~ 54 0
59 PSR J1918-0642 Psr 19 18 48.033123 -06 42 34.88950           ~ 116 0
60 PSR J1923+2515 Psr 19 23 22.494560 +25 15 40.64360           ~ 44 0
61 PSR B1937+21 Psr 19 39 39.6 +21 37 22           ~ 1067 2
62 PSR J1944+0907 Psr 19 44 09.32 +09 07 23.2           ~ 54 1
63 PSR J1949+3106 Psr 19 49 29.63851 +31 06 03.8289           ~ 39 0
64 PSR B1953+29 Psr 19 55 27.8680959374 +29 08 43.499227152           ~ 289 1
65 PSR J1959+2048 Psr 19 59 36.7643141520 +20 48 14.896407996   21.08 20.16 19.53 18.79 G: 807 3
66 PSR J2010-1323 Psr 20 10 45.9211 -13 23 56.083           ~ 77 0
67 PSR J2017+0603 Psr 20 17 22.7048 +06 03 05.585           ~ 100 1
68 PSR J2019+24 Psr 20 19 31.94900 +24 25 15.3038           ~ 135 1
69 PSR J2043+1711 Psr 20 43 20.8828 +17 11 28.941           ~ 108 1
70 V* LY Aqr Psr 20 51 07.5145 -08 27 37.795           ~ 206 2
71 PSR B2145-07.8 Psr 21 45 50.45590 -07 50 18.5900           ~ 285 0
72 PSR J2214+3000 Psr 22 14 38.8480 +30 00 38.209           ~ 109 0
73 PSR J2215+51 Psr 22 15 32.6869149432 +51 35 36.400854912           ~ 140 0
74 PSR J2229+26 Psr 22 29 50.8864 +26 43 57.785           ~ 105 1
75 PSR J2235+1506 Psr 22 35 43.7001 +15 06 49.060           ~ 39 0
76 PSR J2302+4442 Psr 23 02 46.9789 +44 42 22.102           ~ 105 0
77 PSR J2317+1439 Psr 23 17 09.230 +14 39 31.18           ~ 186 1
78 PSR J2322+2057 Psr 23 22 22.33517 +20 57 02.6754           ~ 109 1
79 3C 461 BL? 23 23 24.000 +58 48 54.00     14.30     ~ 2792 1

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