Anumarlapudi et al. present the detection of 661 known pulsars observed with the Australian SKA Pathfinder (ASKAP) telescope at 888 MHz as a part of the Rapid ASKAP Continuum Survey (RACS). Detections were made through astrometric coincidence and the false detection rate is estimated to be ∼0.5%. Using archival data at 400 and 1400 MHz, they estimate the power law spectral indices for the pulsars in our sample and find that the mean spectral index is −1.8. However, they also find that a single power law is inadequate to model all the observed spectra. Using Stokes V measurements from the RACS data, they measured a circular polarization fraction of 9% for the sample and find that the mean polarization fraction is ∼ 10% (consistent between detections and upper limits).

The image above shows the spatial distribution of all the RACS sources that have a pulsar in the ATNF catalog within 10 arcseconds. Sky positions (in a Mollweide projection) of all the ATNF pulsars are shown as gray dots, the RACS Stokes I pulsar detections are shown as orange diamonds, and simultaneous RACS Stokes I and Stokes V detections are shown as blue stars. The black dashed line shows the declination limit, +41 degrees, for the RACS data release 1. The region within 5 degrees of the Galactic plane is shown by the green shaded region.