arXiv subjects

V. S. Tyul'bashev

Publications and source records attributed to V. S. Tyul'bashev.

5 recordsLinked to original sources

arXiv2024

Search for rotating radio transients in PUMPS

A search for pulsed radiation at a frequency of 111 MHz in the direction of 116 RRAT candidates was carried out. For the search, archival data obtained on a meridian 128-beam radio telescope, a Large Phased Array (LPA), was used. For each candidate, about six days of observations were accumulated over an interval of eight years. Eleven new RRATs have been discovered. It was possible to estimate periods for six of them, and to construct average profiles for four of them. Some of the candidates turned out to be known pulsars observed in the side lobes of the radio telescope and interference. For the part of the candidates could not find pulses with a signal-to-noise ratio of more than seven, and their nature remains unknown.

astro-ph.HE↗

arXiv2022

Detection of new pulsars at the frequency 111 MHz

The pulsar search was started at the radio telescope LPA LPI at the frequency 111~MHz. The first results deals of a search for right ascension $0^h - 24^h$ and declinations $+21^{\circ} - +42^{\circ}$ are presented in paper. The data with sampling 100 ms and with 6 frequency channals was used. It were found 34 pulsars. Seventeen of them previously been observed at radio telescope LPA LPI, and ten known pulsars has not previously been observed. It were found 7 new pulsars.

astro-ph.HE↗

arXiv2022

Detection of Five New RRATs at 111 MHz

Results of 111-MHz monitoring observations carried out on the Big Scanning Antenna of the Pushchino Radio Astronomy Observatory during September 1-28, 2015 are presented. Fifty-four pulsating sources were detected at declinations $-9^o < δ< +42^o$. Forty-seven of these are known pulsars, five are new sources, and two are previously discovered transients. Estimates of the peak flux densities and dispersion measures are presented or all these sources.

astro-ph.HE↗

arXiv2022

Search and detection of pulsars in the monitoring observations at the frequency 111 MHz

Pulsars with periods more than 0.4 seconds in the declination range -9o < decj < 42o and in the right ascension range 0h < r.a.< 24h were searched in parallel with the program of interplanetary scintillations monitoring of a large number of sources with the radiotelescope LPA LPI. Four-year observations carried out at the central frequency 110.25 MHz in the band 2.5 MHz and in six frequency channels with the time resolution 100 ms were used for the search. Initial detections of candidates for pulsars were based on the Fourier power spectra averaged over the whole observations period. The candidates for pulsars were checked in more details from observations analysis with higher time-frequency resolution: 32 frequency channels with time resolution of 12.5 ms. 18 new pulsars was discovered, their main characteristics are presented.

astro-ph.HE↗

arXiv2022

Search for pulsars in the summed power spectra at a frequency of 111 MHz

The search of pulsars in monitoring observations being carried out for 5 years using LPA LPI radio telescope was done in 96 spatial beams covering daily 17,000 square degrees. Five new pulsars were detected. Candidates into pulsars were selected in the summed power spectra. The use of a noise generator allowed to renormalize the data and to perform correct summing up of the power spectra for individual directions in the sky. Herewith, the sensitivity increased more than 20 times in comparison with individual sessions of observations. For pulsars with pulse durations greater than 100 ms at declinations +30o<dec.<+40o it is equal to 1.2 mJy and 0.4 mJy in/out of the Galaxy plane.

astro-ph.HE↗