Pushchino Multibeam Pulsar Search. X. Observations of pulsars at declinations above $+53^o$

TL;DR

This paper reports a pulsar survey at high declinations using a large phased array, achieving increased sensitivity through multiple observations and successfully detecting 35 known pulsars and estimating flux densities for most.

Contribution

It introduces a high declination pulsar search method with enhanced sensitivity via multiple observations and spectral summation, expanding pulsar detection capabilities.

Findings

Detected 35 known pulsars in the survey.

Achieved 5-10 times sensitivity improvement.

Estimated flux densities for 33 pulsars.

Abstract

A search for pulsars was carried out using a Large Phased Array (LPA) radio telescope at a frequency of 110.4 MHz with a time resolution of 3.072 ms and a frequency resolution of 19.5 kHz with a 2.5 MHz bandwidth used. The survey was conducted in a site with declinations of $+53^\circ < \delta < +87^\circ$. The viewing area is approximately 4100 sq.deg. The search was carried out using Fourier power spectra. To increase sensitivity, multiple observations were made in each direction in the sky, and the resulting power spectra were summarized. This made it possible to increase sensitivity by about 5-10 times, depending on the direction in the sky. A blind search opened 35 known pulsars. Estimates of the flux density for 33 pulsars have been obtained.