Revealing the Unseen: The Discovery of Long-Awaited Radiation from the Intermittent Pulsar PSR B1931+24
Abdujappar Rusul, Z. G. Wen, J. P. Yuan, Ali Esamdin, X. P. Zheng, Michael Kramer

TL;DR
This study used FAST telescope observations to detect weak, intermittent radio emissions from PSR B1931+24 during its 'off' states, revealing new insights into pulsar magnetospheric behavior and emission mechanisms.
Contribution
The paper presents the first detection of weak emission during 'off' states of an intermittent pulsar, challenging existing models and supporting the magnetospheric emission theory.
Findings
Detection of weak emission with dwarf pulses during 'off' states
Significant contraction in pulse width during 'off' states
Dwarf pulses share properties with 'on' state pulses, indicating a continuum
Abstract
Pulsars are typically characterized by their stable, highly magnetized, and fast-rotating nature, which underpins their persistent radio emissions. However, the discovery of prolonged radio-quiet ("off") states in intermittent pulsars, such as PSR B1931+24, has challenged the most fundamental theory of pulsar magnetospheric emission. Despite long-term monitoring with several telescopes, continuous emission during these "off" states had not been detected in 20 years of observations. Fortunately, sensitive observations via Five-hundred-meter Aperture Spherical radio Telescope (FAST) revealed the mysterious weak emission containing occasional bursting dwarf pulses during the "off" states of PSR B1931+24. Along with a substantial decrease in flux density, a significant contraction in the integrated pulse width is measured in the "off" state compared to the radio-loud ("on") state,…
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