A study of strong pulses detected from PSR B0656+14 using Urumqi 25-m radio telescope at 1540MHz

TL;DR

This study analyzes strong, sporadic pulses from PSR B0656+14 at 1540 MHz, revealing their properties, phase distribution, and energy distribution, distinguishing them from typical giant and regular pulses.

Contribution

It provides the first detailed characterization of strong pulses from PSR B0656+14, including their phase, width, and energy distribution, using data from Urumqi 25-m radio telescope.

Findings

67 strong pulses detected with SNR above 5σ

Pulse energies follow a lognormal distribution

Strong pulses are narrower and phase-shifted ahead of the average profile

Abstract

We report on the properties of strong pulses from PSR B0656+14 by analyzing the data obtained using Urumqi 25-m radio telescope at 1540 MHz from August 2007 to September 2010. In 44 hrs of observational data, a total of 67 pulses with signal-to-noise ratios above a 5-{\sigma} threshold were detected. The peak flux densities of these pulses are 58 to 194 times that of the average profile, and the pulse energies of them are 3 to 68 times that of the average pulse. These pulses are clustered around phases about 5 degrees ahead of the peak of the average profile. Comparing with the width of the average profile, they are relatively narrow, with the full widths at half-maximum range from 0.28 to 1.78 degrees. The distribution of pulse-energies of the pulses follows a lognormal distribution. These sporadic strong pulses detected from PSR B0656+14 are different in character from the typical giant pulses, and from its regular pulses.