Results 21 to 30 of about 108,919 (255)
Gamma-Ray Polarimetry of the Crab Pulsar Observed by POLAR [PDF]
Monthly notices of the Royal Astronomical Society, 2022 The X/γ ray polarimetry of the Crab pulsar/nebula is believed to hold crucial information on their emission models. In the past, several missions have shown evidence of polarized emission from the Crab.
Hancheng Li +17 more
semanticscholar +1 more source
First searches for gravitational waves from r -modes of the Crab pulsar [PDF]
Physical Review D, 2021 We present the first searches for gravitational waves from r-modes of the Crab pulsar, coherently and separately integrating data from three stretches of the first two observing runs of Advanced LIGO using the F-statistic.
B. Rajbhandari +3 more
semanticscholar +1 more source
Ultra-high-energy Gamma-Ray Radiation from the Crab Pulsar Wind Nebula [PDF]
Astrophysical Journal, 2022 It has been long debated whether the high-energy gamma-ray radiation from the Crab Nebula stems from leptonic or hadronic processes. In this work, we investigate the multiband nonthermal radiation from the Crab pulsar wind nebula with the leptonic and ...
L. Nie, Yang Liu, Zejun Jiang, X. Geng
semanticscholar +1 more source
Narrow-band giant pulses from the Crab pulsar [PDF]
Monthly notices of the Royal Astronomical Society, 2021 We used a new spectral-fitting technique to identify a subpopulation of 6 narrow-band giant pulses from the Crab pulsar out of a total of 1578. These giant pulses were detected in 77 min of observations with the 46-m dish at the Algonquin Radio ...
Parasar Thulasiram, Hsiu-Hsien Lin
semanticscholar +1 more source
Crab Pulsar Radiation Mechanism [PDF]
Nature Physical Science, 1971 SMITH has recently presented an oblique rotator model for the Crab pulsar1 in which the magnetic axis is inclined at an angle of 45° to the rotation axis and the observer's line of sight is at a latitude of about 20°. This model is in conflict with that discussed by Wampler et al.2, Kristian et al.3, Manchester4 and others, in which the magnetic axis ...
R. N. MANCHESTER, E. TADEMARU
openaire +2 more sources
Phase-resolved spectrum of the Crab pulsar from NICER [PDF]
Astronomy & Astrophysics, 2021 Context. Studies of the high-energy emission regions of rotation-powered pulsars are typically based on folded light curves (FLCs) and phase-resolved spectra (PRS). Aims.
M. Vivekanand
semanticscholar +1 more source
The slow rise and recovery of the 2019 Crab pulsar glitch [PDF]
, 2021 We present updated measurements of the Crab pulsar glitch of 2019 July 23 using a dataset of pulse arrival times spanning ∼5 months. On MJD 58687, the pulsar underwent its seventh largest glitch observed to date, characterised by an instantaneous spin-up
B. Shaw +6 more
semanticscholar +1 more source
Collision energies: Optimization strategies for bottom‐up proteomics
Mass Spectrometry Reviews, Volume 42, Issue 4, Page 1261-1299, July/August 2023., 2023 Abstract Mass‐spectrometry coupled to liquid chromatography is an indispensable tool in the field of proteomics. In the last decades, more and more complex and diverse biochemical and biomedical questions have arisen. Problems to be solved involve protein identification, quantitative analysis, screening of low abundance modifications, handling matrix ...
Ágnes Révész +6 more
wiley +1 more source
Journal of Geophysical Research: Space Physics, Volume 128, Issue 2, February 2023., 2023 Abstract We present long‐term density trends of the Earth's upper atmosphere at altitudes between 71 and 116 km, based on atmospheric occultations of the Crab Nebula observed with X‐ray astronomy satellites, ASCA, RXTE, Suzaku, NuSTAR, and Hitomi. The combination of the five satellites provides a time period of 28 years from 1994 to 2022.
Satoru Katsuda +11 more
wiley +1 more source
NAVIGATION, Volume 68, Issue 4, Page 687-708, Winter 2021., 2021 Abstract A server satellite that is parked in a stable distant retrograde orbit (DRO) in the vicinity of the Moon can provide navigation service for satellites in the Earth–Moon system. In this study, X‐ray pulsar navigation (XPNAV) is investigated to determine the server's orbital position and velocity, and maintain its onboard timing autonomously to ...
Jiangkai Liu +4 more
wiley +1 more source