Results 1 to 10 of about 120,893 (256)
EPJ Web of Conferences, 2017 The last six years have witnessed major revisions of our knowledge about the Crab Pulsar. The consensus scenario for the origin of the high-energy pulsed emission has been challenged with the discovery of a very-high-energy power law tail extending up to
Zanin Roberta
doaj +7 more sources
Fast On-orbit Pulse Phase Estimation of X-ray Crab Pulsar for XNAV Flight Experiments [PDF]
IEEE Transactions on Aerospace and Electronic Systems, 2022, 2022 The recent flight experiments with Neutron Star Interior Composition Explorer (\textit{NICER}) and \textit{Insight}-Hard X-ray Modulation Telescope (\textit{Insight}-HXMT) have demonstrated the feasibility of X-ray pulsar-based navigation (XNAV) in the space.
Yidi Wang +6 more
arxiv +3 more sources
Evolution of Spin Period and Magnetic Field of the Crab Pulsar: Decay of the Braking Index by the Particle Wind Flow Torque [PDF]
Universe, 2022 The evolutions of a neutron star’s rotation and magnetic field (B-field) have remained unsolved puzzles for over half a century. We ascribe the rotational braking torques of pulsar to both components, the standard magnetic dipole radiation (MDR) and ...
Cheng-Min Zhang +10 more
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Resolving the Emission Regions of the Crab Pulsar’s Giant Pulses. II. Evidence for Relativistic Motion [PDF]
The Astrophysical Journal, 2023 The Crab Pulsar is the prime example of an emitter of giant pulses. These short, very bright pulses are thought to originate near the light cylinder, at ∼1600 km from the pulsar.
Rebecca Lin +5 more
doaj +2 more sources
The Crab Pulsar and Nebula as Seen in Gamma-Rays [PDF]
Universe, 2021 Slightly more than 30 years ago, Whipple detection of the Crab Nebula was the start of Very High Energy gamma-ray astronomy. Since then, gamma-ray observations of this source have continued to provide new surprises and challenges to theories, with the ...
Elena Amato, Barbara Olmi
doaj +2 more sources
Mission Overview and Initial Observation Results of the X-Ray Pulsar Navigation-I Satellite
International Journal of Aerospace Engineering, 2017 The newly launched X-ray pulsar navigation-I (XPNAV-1) is an experimental satellite of China that is designed for X-ray pulsar observation. This paper presents the initial observation results and aims to recover the Crab pulsar’s pulse profile to verify ...
Xinyuan Zhang +4 more
doaj +2 more sources
Phase-resolved Deadtime of the Crab Pulsar Using IXPE Data [PDF]
The Astrophysical JournalAfter receiving an X-ray photon, an X-ray detector is not operational for a duration known as deadtime. It is detector specific and its effect on the data depends upon the luminosity of the source.
M. Vivekanand
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Observations of the Crab Nebula and Pulsar with the Large-sized Telescope Prototype of the Cherenkov Telescope Array [PDF]
The Astrophysical Journal, 2023 The Cherenkov Telescope Array (CTA) is a next-generation ground-based observatory for gamma-ray astronomy at very high energies. The Large-Sized Telescope prototype (LST-1) is located at the CTA-North site, on the Canary Island of La Palma.
H. Abe +289 more
doaj +2 more sources
Pulsar Emissions, Signal Modeling and Passive ISAR Imaging [PDF]
Sensors, 2019 The present work addresses pulsar Crab Nebula emissions from point of view of their modeling and applications for asteroid detection and imaging by applying inverse synthetic aperture radar (ISAR) principles.
Andon Lazarov
doaj +2 more sources
On the progenitor of the Crab pulsar
Monthly Notices of the Royal Astronomical SocietyAbstract We investigate the progenitor of the Crab supernova by examining the remnant’s surrounding stellar population. The Crab is interesting because of the apparently low energy and mass of the supernova remnant. We also know it was not a binary at death and that the explosion formed a neutron star.
Elvira Cruz-Cruz, C S Kochanek
openaire +3 more sources