Library · IAA RAS

Papers

Statistics of Detections of Impulse Signals in the Sky Area with Declinations from +52° to +56° at a Frequency of 111 MHz

V. A. Samodurov, S. A. Tulbashev, M. O. Toropov, A. V. Dolgushev, V. V. Oreshko, S. V. Logvinenko, E. A. Isaev

Transactions of IAA RAS, issue 66, 37–44 (2023)

Keywords: processing technique, rotating radio transient (RRAT), pulsar, longwave radio emission

Abstract

The task was set to search for and statistically analyze pulse signals during the sky survey monitoring program at the BSA radio telescope of the Lebedev Physical Institute. The main goal of this work is to search for pulsars and other transients in the observational data of this radio telescope for the new site of our survey in the declination band +52° < δ < +56°. A technique for stream processing of the obtained observational data has been developed. The daily survey data on the multibeam diagram of the BSA of the Lebedev Physical Institute were sequentially divided into segments of 10 seconds. In each time interval for each ray of the BSA, for each interval of observed frequencies, the main characteristic parameters of the data were determined: the average median value of the data in the selected interval of the selected frequency interval for a given ray of the diagram, the value of the maximum and minimum of the data and their location in this time segment, root mean square deviation and some other parameters. The data parameters found for each segment were tied to right ascension and recorded in special compressed data files. After that, their statistical analysis was carried out in relation to the observation time and celestial coordinates. Statistical processing of several months of observational data (312 days) recorded in six frequency channels with a total bandwidth of 2.5 MHz showed that, on average, about 10 pulses per hour are observed in each of the 32 connected stationary beams. Many of these events are interconnected (manifesting themselves in several beams of the BSA), and, after combining, an average of 21.4 combined events are detected per hour, or approximately one event every 3 minutes. In total, more than 160 thousand interconnected events were found. When identifying events that occur only in 1–2 neighboring radio telescope beams (more than 40 thousand of these were found), it was found that about 55 % of them were generated by pulsars (showing signs of dispersion delays depending on the registration frequency). For the indicated declination band +52° < δ < +56° the statistics of all impulse phenomena that have signs of dispersion delays were calculated and analyzed. As part of the work carried out, pulses from 4 already known pulsars were found and 4 candidates for new pulsars were identified.

Citation

Text

BibTeX

RIS

V. A. Samodurov, S. A. Tulbashev, M. O. Toropov, A. V. Dolgushev, V. V. Oreshko, S. V. Logvinenko, E. A. Isaev. Statistics of Detections of Impulse Signals in the Sky Area with Declinations from +52° to +56° at a Frequency of 111 MHz // Transactions of IAA RAS. — 2023. — Issue 66. — P. 37–44.

@article{samodurov2023,
  abstract = {The task was set to search for and statistically analyze pulse signals during the sky survey monitoring program at the BSA radio telescope of the Lebedev Physical Institute. The main goal of this work is to search for pulsars and other transients in the observational data of this radio telescope for the new site of our survey in the declination band +52° < δ < +56°. 
A technique for stream processing of the obtained observational data has been developed. The daily survey data on the multibeam diagram of the BSA of the Lebedev Physical Institute were sequentially divided into segments of 10 seconds. In each time interval for each ray of the BSA, for each interval of observed frequencies, the main characteristic parameters of the data were determined: the average median value of the data in the selected interval of the selected frequency interval for a given ray of the diagram, the value of the maximum and minimum of the data and their location in this time segment, root mean square deviation and some other parameters. The data parameters found for each segment were tied to right ascension and recorded in special compressed data files. After that, their statistical analysis was carried out in relation to the observation time and celestial coordinates. Statistical processing of several months of observational data (312 days) recorded in six frequency channels with a total bandwidth of 2.5 MHz showed that, on average, about 10 pulses per hour are observed in each of the 32 connected stationary beams. Many of these events are interconnected (manifesting themselves in several beams of the BSA), and, after combining, an average of 21.4 combined events are detected per hour, or approximately one event every 3 minutes. In total, more than 160 thousand interconnected events were found.
When identifying events that occur only in 1–2 neighboring radio telescope beams (more than 40 thousand of these were found), it was found that about 55 % of them were generated by pulsars (showing signs of dispersion delays depending on the registration frequency). For the indicated declination band +52° < δ < +56° the statistics of all impulse phenomena that have signs of dispersion delays were calculated and analyzed. As part of the work carried out, pulses from 4 already known pulsars were found and 4 candidates for new pulsars were identified.},
  author = {V.~A. Samodurov and S.~A. Tulbashev and M.~O. Toropov and A.~V. Dolgushev and V.~V. Oreshko and S.~V. Logvinenko and E.~A. Isaev},
  doi = {10.32876/ApplAstron.66.37-44},
  issue = {66},
  journal = {Transactions of IAA RAS},
  keyword = {processing technique, rotating radio transient (RRAT), pulsar, longwave radio emission},
  pages = {37--44},
  title = {Statistics of Detections of Impulse Signals in the Sky Area with Declinations from +52° to +56° at a Frequency of 111 MHz},
  url = {http://iaaras.ru/en/library/paper/2162/},
  year = {2023}
}

TY  - JOUR
TI  - Statistics of Detections of Impulse Signals in the Sky Area with Declinations from +52° to +56° at a Frequency of 111 MHz
AU  - Samodurov, V. A.
AU  - Tulbashev, S. A.
AU  - Toropov, M. O.
AU  - Dolgushev, A. V.
AU  - Oreshko, V. V.
AU  - Logvinenko, S. V.
AU  - Isaev, E. A.
PY  - 2023
T2  - Transactions of IAA RAS
IS  - 66
SP  - 37
AB  - The task was set to search for and statistically analyze pulse
signals during the sky survey monitoring program at the BSA radio
telescope of the Lebedev Physical Institute. The main goal of this
work is to search for pulsars and other transients in the
observational data of this radio telescope for the new site of our
survey in the declination band +52° < δ < +56°.   A technique for
stream processing of the obtained observational data has been
developed. The daily survey data on the multibeam diagram of the BSA
of the Lebedev Physical Institute were sequentially divided into
segments of 10 seconds. In each time interval for each ray of the
BSA, for each interval of observed frequencies, the main
characteristic parameters of the data were determined: the average
median value of the data in the selected interval of the selected
frequency interval for a given ray of the diagram, the value of the
maximum and minimum of the data and their location in this time
segment, root mean square deviation and some other parameters. The
data parameters found for each segment were tied to right ascension
and recorded in special compressed data files. After that, their
statistical analysis was carried out in relation to the observation
time and celestial coordinates. Statistical processing of several
months of observational data (312 days) recorded in six frequency
channels with a total bandwidth of 2.5 MHz showed that, on average,
about 10 pulses per hour are observed in each of the 32 connected
stationary beams. Many of these events are interconnected
(manifesting themselves in several beams of the BSA), and, after
combining, an average of 21.4 combined events are detected per hour,
or approximately one event every 3 minutes. In total, more than 160
thousand interconnected events were found.  When identifying events
that occur only in 1–2 neighboring radio telescope beams (more than
40 thousand of these were found), it was found that about 55 % of
them were generated by pulsars (showing signs of dispersion delays
depending on the registration frequency). For the indicated
declination band +52° < δ < +56° the statistics of all impulse
phenomena that have signs of dispersion delays were calculated and
analyzed. As part of the work carried out, pulses from 4 already
known pulsars were found and 4 candidates for new pulsars were
identified.
DO  - 10.32876/ApplAstron.66.37-44
UR  - http://iaaras.ru/en/library/paper/2162/
ER  -