Volume 647, March 2021
|Number of page(s)||6|
|Section||Galactic structure, stellar clusters and populations|
|Published online||01 April 2021|
Pulse energy distribution for RRAT J0139+33 according to observations at the 111 MHz frequency
Lebedev Physical Institute, Astro Space Center, Pushchino Radio Astronomy Observatory, 142290 Moscow region, Russia
Accepted: 14 January 2021
Using five-year-monitoring observations, we carried out a blind search for pulses for rotating radio transient (RRAT) J0139+33 and PSR B0320+39. At the interval ±1.5m of the time corresponding to the source passing through the meridian, we detected 39377 individual pulses for the pulsar B0320+39 and 1013 pulses for RRAT J0139+33. The share of registered pulses from the total number of observed periods for the pulsar B0320+39 is 74%, and for the transient J0139+33 it is 0.42%. The signal-to-noise ratio (S/N) for the strongest registered pulses is, approximately, the following: S/N = 262 (for B0320+39) and S/N = 154 (for J0139+33). We obtained distributions of the number of detected pulses in S/N units for the pulsar and for the rotating transient. The distributions could be approximated with lognormal and power dependences. For the B0320+39 pulsar, the dependence is lognormal, and it turns into a power dependence at high values of S/N; and for RRAT J0139+33, the distribution of pulses by energy is described by a broken (bimodal) power dependence with an exponent of about 0.4 and 1.8 (S/N ≤ 19 and S/N ≥ 19). We did not detect a regular (pulsar) emission of J0139+33. Analysis of the obtained data suggests that RRAT J0139+33 is a pulsar with giant pulses.
Key words: pulsars: individual: J0139+33
© ESO 2021
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