Flux-density spectral analysis for several pulsars and two newly-identified gigahertz-peaked spectra

Abstract

In this paper we present results from flux density measurements for 21 pulsars over a wide frequency range, using the Giant Metrewave Radio Telescope (GMRT) and the Effelsberg telescope. Our sample was a set of mostly newly discovered pulsars from the selection of candidates for gigahertz-peaked spectra (GPS) pulsars. Using the results of our observations along with previously published data, we identify two new GPS pulsars. One of them, PSR J1740+1000, with dispersion measure of 24 pc cm${}^{-3}$, is the first GPS pulsar with such a low DM value.We also selected several strong candidates for objects with high frequency turnover in their spectra which require further investigation.We also revisit our source selection criteria for future searches for GPS pulsars.

10 pages, 2 tables, 9 figures, accepted for publication in MNRAS

References in corpus (6)

• The ATNF Pulsar Catalogue
• X-ray Observations of Parsec-Scale Tails behind Two Middle-Aged Pulsars
• The 2000 Periastron Passage of PSR B1259-63
• Pulsars with gigahertz-peaked spectra
• Turn-over in pulsar spectra around 1 GHz
• Observations of pulsars at 9 millimetres

Cited by in corpus (7)

• The analysis of the largest sample of multi-frequency pulsar scatter time estimates
• pulsar_spectra: A pulsar flux density catalogue and spectrum fitting repository
• Simultaneous radio and X-ray observations of PSR B0611+22
• Flux density measurements of GPS candidate pulsars at 610 MHz using interferometric imaging technique
• The significance of low frequency interferometric observations for the GPS pulsar flux estimation: the case of J1740+1000
• The uGMRT observations of three new GPS pulsars
• Beyond the Simple Power Law: A Bayesian Analysis of 897 Pulsar Spectra