Results 131 to 140 of about 1,910,738 (272)

X-ray observations of the high magnetic field radio pulsar PSR J1814-1744 [PDF]

open access: yes, 2000
PSR J1814-1744 is a 4 s radio pulsar with surface dipole magnetic field strength 5.5*10^13 G, inferred assuming simple magnetic dipole braking. This pulsar's spin parameters are very similar to those of anomalous X-ray pulsars (AXPs), suggesting that ...
Becker W.   +14 more
core   +2 more sources

NuSTAR and XMM-Newton Observations of PSR J1930+1852 and Its Pulsar Wind Nebula

open access: yesThe Astrophysical Journal
Synchrotron X-ray emission from a pulsar wind nebula (PWN) is a sensitive probe of its magnetic field and high-energy particle population. Here we analyze contemporaneous NuSTAR and XMM - Newton observations of the PWN G54.1+0.3, powered by pulsar PSR ...
J. A. J. Alford   +2 more
doaj   +1 more source

Resonant Ultrarelativistic Electron–Positron Pair Production by High-Energy Electrons in the Field of an X-ray Pulsar

open access: yesUniverse, 2020
The process of resonant high-energy electron–positron pair production by an ultrarelativistic electron colliding with the field of an X-ray pulsar is theoretically investigated. Resonant kinematics of the process is studied in detail. Under the resonance
Georgii K. Sizykh   +2 more
doaj   +1 more source

Pulsating in unison at optical and X-ray energies: simultaneous high-time resolution observations of the transitional millisecond pulsar PSR J1023+0038

open access: yes, 2019
PSR J1023+0038 is the first millisecond pulsar discovered to pulsate in the visible band; such a detection took place when the pulsar was surrounded by an accretion disk and also showed X-ray pulsations.
Ambrosino, F.   +24 more
core   +1 more source

Imaging X-Ray, Optical, and Infrared Observations of the Transient Anomalous X-Ray Pulsar XTE J1810–197 [PDF]

open access: yes, 2003
We report X-ray imaging, timing, and spectral studies of XTE J1810-197, a 5.54 s pulsar discovered by Ibrahim and coworkers in recent Rossi X-Ray Timing Explorer (RXTE) observations.
E. Gotthelf   +3 more
semanticscholar   +1 more source

High-energy Emission from the Intrabinary Shocks in Redback Pulsars

open access: yesThe Astrophysical Journal
The intrabinary shocks (IBS) of spider pulsars emit nonthermal synchrotron X-rays from accelerated electrons and positrons in the shocked pulsar wind, likely energized by magnetic reconnection.
Andrew G. Sullivan, Roger W. Romani
doaj   +1 more source

The Anomalous X-ray Pulsar 4U 0142+61: Variability in the infrared and a spectral break in the optical

open access: yes, 2004
We present new optical and infrared observations of the counterpart to the Anomalous X-ray Pulsar (AXP) 4U 0142+61 taken with the Keck I telescope. The counterpart is found to be variable in the infrared.
F. Hulleman, M. Kerkwijk, S. Kulkarni
semanticscholar   +1 more source

Modeling X-Ray and Gamma-Ray Emission from Redback Pulsar Binaries

open access: yesThe Astrophysical Journal
We investigated the multiband emission from the pulsar binaries XSS J12270−4859, PSR J2039−5617, and PSR J2339−0533, which exhibit orbital modulation in the X-ray and gamma-ray bands.
Minju Sim   +2 more
doaj   +1 more source

Recent progress on anomalous X-ray pulsars [PDF]

open access: yesAstrophysics and Space Science, 2007
I review recent observational progress on Anomalous X-ray Pulsars, with an emphasis on timing, variability, and spectra. Highlighted results include the recent timing and flux stabilization of the notoriously unstable AXP 1E 1048.1-5937, the remarkable glitches seen in two AXPs, the newly recognized variety of AXP variability types, including outbursts,
openaire   +3 more sources

Resolving the bow-shock nebula around the old pulsar PSR B1929+10 with multi-epoch Chandra observations

open access: yes, 2008
We have studied the nearby old pulsar PSR B1929+10 and its surrounding interstellar medium utilizing the sub-arcsecond angular resolution of the Chandra X-ray Observatory.
Becker, W., Hui, C. Y.
core   +1 more source

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