Insight-HXMT observations of the Crab pulsar

Abstract

We report on X-ray emission properties of the Crab pulsar(PSR B0531+21) using observations by Insight-HXMT during its first year after launch. We obtained high signal-to-noise profiles in the X-ray energy band 11-250 keV. We have confirmed an increase in the flux ratio of the second peak over the main peak with increasing energy, consistent with other missions. The separation of the two peaks shows no significant trend with increasing energy. The phase-averaged spectrum, fitted by a logpar model, and the phase-resolved spectra of the Crab pulsar, fitted by a powerlaw in the different energy bands of HXMT, are consistent with RXTE and NuSTAR in that photon indices evolve as a function of phase as well as a function of energy contributing to a broadband modeling.

arXiv comment10 pages, 5 figures, accepted for publication in RAA

References in corpus (13)

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• INTEGRAL observations of the Crab pulsar
• The Infrared to Gamma-Ray Pulse Shape of the Crab Nebula Pulsar
• Time evolution of the X-ray and gamma-ray fluxes of the Crab pulsar
• EGRET Gamma-Ray Observations of the Crab P2/P1 Ratio
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Cited by in corpus (7)

• Overview to the Hard X-ray Modulation Telescope (Insight-HXMT) Satellite
• Fast On-orbit Pulse Phase Estimation of X-ray Crab Pulsar for XNAV Flight Experiments
• Discovery of delayed spin-up behavior following two large glitches in the Crab pulsar, and the statistics of such processes
• The braking index of PSR B0540-69 and the associated pulsar wind nebula emission after spin-down rate transition
• Phase-resolved gamma-ray spectroscopy of the Crab pulsar observed by POLAR
• The influence of the Insight-HXMT/LE time response on timing analysis
• Pulsars in AstroSat-CZTI: Detection in sub-MeV bands and Estimation of Spectral Index from Hardness Ratios