2016MNRAS.461..908B

Query : 2016MNRAS.461..908B

2016MNRAS.461..908B - Mon. Not. R. Astron. Soc., 461, 908-921 (2016/September-1)

Time-domain and spectral properties of pulsars at 154 MHz.

BELL M.E., MURPHY T., JOHNSTON S., KAPLAN D.L., CROFT S., HANCOCK P., CALLINGHAM J.R., ZIC A., DOBIE D., SWIGGUM J.K., ROWLINSON A., HURLEY-WALKER N., OFFRINGA A.R., BERNARDI G., BOWMAN J.D., BRIGGS F., CAPPALLO R.J., DESHPANDE A.A., GAENSLER B.M., GREENHILL L.J., HAZELTON B.J., JOHNSTON-HOLLITT M., LONSDALE C.J., McWHIRTER S.R., MITCHELL D.A., MORALES M.F., MORGAN E., OBEROI D., ORD S.M., PRABU T., UDAYA SHANKAR N., SRIVANI K.S., SUBRAHMANYAN R., TINGAY S.J., WAYTH R.B., WEBSTER R.L., WILLIAMS A. and WILLIAMS C.L.

Abstract (from CDS):

We present 154 MHz Murchison Widefield Array imaging observations and variability information for a sample of pulsars. Over the declination range -80deg < δ < 10deg, we detect 17 known pulsars with mean flux density greater than 0.3 Jy. We explore the variability properties of this sample on time-scales of minutes to years. For three of these pulsars, PSR J0953+0755, PSR J0437-4715, and PSR J0630-2834, we observe interstellar scintillation and variability on time-scales of greater than 2 min. One further pulsar, PSR J0034-0721, showed significant variability, the physical origins of which are difficult to determine. The dynamic spectra for PSR J0953+0755 and PSR J0437-4715 show discrete time and frequency structure consistent with diffractive interstellar scintillation and we present the scintillation bandwidth and time-scales from these observations. The remaining pulsars within our sample were statistically non-variable. We also explore the spectral properties of this sample and find spectral curvature in pulsars PSR J0835-4510, PSR J1752-2806, and PSR J0437-4715.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

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

Simbad objects: 19

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Number of rows : 19
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 B0031-07 Psr 00 34 08.9100 -07 21 56.000           ~ 323 0
2 PSR J0437-47 Psr 04 37 15.7994581776 -47 15 08.544351636           DC 906 0
3 NAME Pic A Sy1 05 19 49.7229323856 -45 46 43.852662732   15.73 15.77 14.85   ~ 665 1
4 PSR B0628-28 Psr 06 30 49.3710 -28 34 42.200           ~ 295 0
5 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1230 2
6 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2316 1
7 PSR B0950+08 Psr 09 53 09.2970 +07 55 36.400           ~ 755 2
8 PSR B1055-52 Psr 10 57 59.0450 -52 26 56.330           ~ 725 0
9 PSR B1356-60 Psr 13 59 58.2480 -60 38 07.550           ~ 115 0
10 SNR G310.6-01.6 SNR 14 00 45.69 -63 25 42.6           ~ 36 1
11 PSR B1449-64 Psr 14 53 32.6546 -64 13 16.047           ~ 143 0
12 PSR B1451-68 Psr 14 56 00.0175876848 -68 43 40.034742348           ~ 186 0
13 PSR B1530-53 Psr 15 34 08.3012586672 -53 34 20.547404184           ~ 71 0
14 PSR B1648-42 Psr 16 51 48.7700 -42 46 09.400           ~ 61 0
15 PSR B1703-40 Psr 17 07 21.7500 -40 53 57.000           ~ 48 0
16 PSR B1749-28 Psr 17 52 58.7130 -28 06 33.900           ~ 261 0
17 PSR B1818-04 Psr 18 20 52.5920 -04 27 37.120           ~ 211 0
18 PSR B1857-26 Psr 19 00 47.5440 -26 00 44.200           ~ 180 0
19 PSR B2045-16 Psr 20 48 35.7700 -16 16 47.000           ~ 319 0

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