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Abstract <p>A search has been carried out for the pulsar J0311+1402, which has a period <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(P = 40.9\)</EquationSource> <!--AstEng2570252Tyulbashev-m1--> </InlineEquation> s, in the data archive of the Large Phased Array (LPA) radio telescope. When searching using fast folding algorithms (FFA), periodic pulsar radiation at a frequency 111 MHz was not detected. In 3321 observation sessions lasting 5 minutes, 35 strong pulses were detected with a signal-to-noise ratio (S/N) greater than 10. Some of the pulses have a complex multi-peak structure consisting of narrow details, while some of the pulses are single-component. The peak flux densities of the details of these strong pulses are from 2 to 11 Jy. The peak value (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\({S_p} = 2\)</EquationSource> <!--AstEng2570252Tyulbashev-m2--> </InlineEquation> Jy) and the integral (<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\({S_i} = 7\)</EquationSource> <!--AstEng2570252Tyulbashev-m3--> </InlineEquation> mJy) flux density in the average profile obtained from strong pulses. It is shown that pulsar pulses in the meter wavelength range arrive sporadically, and the pulsar is similar in its properties to a rotating radio transient (RRAT). The pulsar has the minimum dispersion measure, the minimum distance from the Sun, and the minimum pseudo-luminosity of all known pulsars. The timing made it possible to improve the previously obtained value of the period <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(P\)</EquationSource> <!--AstEng2570252Tyulbashev-m4--> </InlineEquation> and to estimate the period derivative <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(\dot P\)</EquationSource> <!--AstEng2570252Tyulbashev-m5--> </InlineEquation>. Depending on the residual deviations from the time of arrival (TOA) of pulses, discontinuities are visible when no pulses were observed. The duration of these breaks can be hundreds of days.</p>

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The Pushchino Multibeams Pulsar Search. VIII. Pulsar with a Period of 40.9 s in Observations of the LPA LPI

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • S. A. Tyul’bashev,
  • G. E. Tyul’basheva,
  • S. A. Andrianov,
  • M. A. Kitaeva

摘要

Abstract

A search has been carried out for the pulsar J0311+1402, which has a period \(P = 40.9\) s, in the data archive of the Large Phased Array (LPA) radio telescope. When searching using fast folding algorithms (FFA), periodic pulsar radiation at a frequency 111 MHz was not detected. In 3321 observation sessions lasting 5 minutes, 35 strong pulses were detected with a signal-to-noise ratio (S/N) greater than 10. Some of the pulses have a complex multi-peak structure consisting of narrow details, while some of the pulses are single-component. The peak flux densities of the details of these strong pulses are from 2 to 11 Jy. The peak value ( \({S_p} = 2\) Jy) and the integral ( \({S_i} = 7\) mJy) flux density in the average profile obtained from strong pulses. It is shown that pulsar pulses in the meter wavelength range arrive sporadically, and the pulsar is similar in its properties to a rotating radio transient (RRAT). The pulsar has the minimum dispersion measure, the minimum distance from the Sun, and the minimum pseudo-luminosity of all known pulsars. The timing made it possible to improve the previously obtained value of the period \(P\) and to estimate the period derivative \(\dot P\) . Depending on the residual deviations from the time of arrival (TOA) of pulses, discontinuities are visible when no pulses were observed. The duration of these breaks can be hundreds of days.