17 and 24 GHz observations of southern pulsars

Abstract

We present observations of PSRs J0437-4715, J0738-4042, J0835-4510, J0908-4913, J1048-5832, J1622-4950, J1644-4559, J1721-3532 and J1740-3015 at 17 GHz using the Parkes radio telescope. All 9 were detected at 17 GHz, additionally, we detected PSR J0835-4510 and J1622-4950 at 24 GHz. Polarisation profiles of each pulsar and the variation with frequency are discussed. In general, we find that the highly polarised edge components of young pulsars continue to dominate their profiles at 17 GHz. Older pulsars (>10^5 years) appear to be almost completely depolarised. Our detection of PSR J0437-4715 is the highest frequency observation of a millisecond pulsar to date, and implies a luminosity at 17 GHz of 14 μJy kpc^2, and a mean spectral index of 2.2. We find that the spectral index of the magnetar PSR J1622-4950 is flat between 1.4 and 24 GHz, similar to the other known radio magnetars XTE J1810-197 and 1E 1547.0-5408. The profile is similar to that at 3.1 GHz, and is highly linearly polarised. Analysis of the frequency evolution of the profile of PSR J0835-4510 show that the profile is made of four components that vary with frequency only in their amplitude. The width and separation of the components remains fixed and the spectral index of each component can be determined independently.

10 Pages, 17 Figures, accepted for publication in MNRAS

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Cited by in corpus (21)

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• Pulse Morphology of the Galactic Center Magnetar PSR J1745-2900
• Simultaneous Multi-band Radio & X-ray Observations of the Galactic Center Magnetar SGR 1745$-$2900
• 5 GHz TMRT observations of 71 pulsars
• Time-domain and spectral properties of pulsars at 154 MHz
• Gigahertz-peaked spectra pulsars and thermal absorption model
• A polarization census of bright pulsars using the Ultra-Wideband Receiver on the Parkes radio telescope
• High-cadence observations and variable spin behaviour of magnetar Swift J1818.0-1607 after its outburst
• An 86-GHz search for Pulsars in the Galactic Center with the Atacama Large Millimeter/submillimeter Array
• TMRT observations of 26 pulsars at 8.6 GHz
• The first detection of a pulsar with ALMA
• Observations of Radio Magnetars with the Deep Space Network
• A broadband radio study of PSR J0250+5854: the slowest-spinning radio pulsar known
• Detection of pulses from the Vela pulsar at millimeter wavelengths with phased ALMA
• Detection of quasi-periodic micro-structure in three millisecond pulsars with the Large European Array for Pulsars
• High Frequency Radio Observations of Two Magnetars, PSR J1622$-$4950 and 1E 1547.0$-$5408
• Highly polarized components of integrated pulse profiles
• 50-250 MHz Pulsar Census with an SKA-Low prototype station: Spectra and Polarization