Pushchino multibeam pulsar search – I. Targeted search of weak pulsars. Issue 1 (8th October 2022)

• Record Type: Journal Article
• Authors: Tyul'bashev, Sergei A; Kitaeva, Marina A; Tyul'basheva, Gayane E
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 517:Issue 1(2022)
• Page Start: 1112
• Page End: 1125
• Publication Date: 2022-10-08
• Subjects: pulsars: general; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stac2404
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: The search for pulsars in a sample of pulsar candidates found based on a multi-year survey conducted with low (six channels; sampling 0.1s) time-frequency resolution on declinations −9° < δ < +42° was carried out with the Large Phased Array of the Lebedev Physical Institute (LPA LPI). LPA is a transit telescope operating at 111 MHz with a bandwidth of 2.5 MHz. Search, analysis and evidence of pulsar detection were carried out using a visualization programme of summed up power spectra obtained from the survey data with high (32 channels; sampling 12.5 ms) time-frequency resolution. 11 new pulsars with periods P 0 = 0.41–3.75 s and dispersion measure DM = 15–154 pc cm −3 have been discovered. In total, in the survey with a low-time-frequency resolution for the period 2016–2021 in a blind search 203 pulsars were found, among them 42 new and 161 known pulsars. It is shown that in the search on the data with high-time-frequency resolution accumulated over a time interval of seven years, pulsars with a flux density of 0.1–0.2 mJy at the frequency of 111 MHz can be detected. When searching for pulsars with regular (periodic) emission at declinations +21° < δ < +42 o, all pulsars located outside the galactic plane having P 0 ≥ 0.5 s, DM ≤ 100 pc cm −3, and the flux density S ≥ 0.5 mJy can be detected.