Study of pulsar flux density and its variability with Parkes data archive

Abstract

We present average flux density measurements of 151 radio pulsars at 1.4 GHz with the Parkes 'Murriyang' radio telescope. We recommend our results be included in the next version of the ATNF pulsar catalogue. The large sample of pulsars together with their wide dispersion measure (DM) range make this data set useful for studying variability of flux density, pulsar spectra, and interstellar medium (ISM). We derive the modulation indices and structure-function from the flux density time series for 95 and 54 pulsars, respectively. We suggest the modulation index also be included in the next version of the pulsar catalogue to manifest the variability of pulsar flux density. The modulation index of flow density and DM are negatively correlated. The refractive scintillation (RISS) timescales or its lower bound for a set of 15 pulsars are derived. They are very different from theoretical expectations, implying the complicated properties of the ISM along different lines of sight. The structure-function for other pulsars is flat. The RISS parameters for some of these pulsars possibly could be derived with different observing strategies in the future.

References in corpus (14)

• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
• Transient pulsed radio emission from a magnetar
• The observed spiral structure of the Milky Way
• Polarimetry of 600 pulsars from observations at 1.4 GHz with the Parkes radio telescope
• Discovery of 28 pulsars using new techniques for sorting pulsar candidates
• The High Time Resolution Universe Pulsar Survey XII : Galactic plane acceleration search and the discovery of 60 pulsars
• Discovery of Five Recycled Pulsars in a High Galactic Latitude Survey
• Extreme Scattering Events Towards Two Young Pulsars
• 5 GHz TMRT observations of 71 pulsars
• Long-term Observations of Three Nulling Pulsars
• A polarization census of bright pulsars using the Ultra-Wideband Receiver on the Parkes radio telescope
• Flux density variability of 286 radio pulsars from a decade of monitoring
• Flux density measurements for 32 pulsars in the 20 cm band

Cited by in corpus (2)

• Flux density monitoring of 89 millisecond pulsars with MeerKAT
• Flux Density Stability and Temporal Changes in the Spectra of Millisecond Pulsars using the GMRT