A refined ephemeris and phase resolved X-ray spectroscopy of the Geminga pulsar
arXiv:astro-ph/0509038 · doi:10.1086/491615
Abstract
We present a refined phase-connected post-glitch ephemeris for the Geminga pulsar that is a good fit to all the post-glitch data from EGRET, ASCA, and XMM. We also present the results of phase-resolved spectroscopy of two XMM X-ray observations of the Geminga pulsar obtained in 2002 and 2004. An investigation is made into a previously claimed existence of a small hot spot on the neutron star surface. We conclude that that interpretation was more likely an artifact of an overly restrictive assumption used to fit the phase-resolved spectra, namely, that the spectral index of the non-thermal component is constant. When we allow the spectral index to vary as a function of rotation phase, we find systematic variations in spectral index, and such fits do not require an additional, hot blackbody component.
arXiv comment11 pages, 11 figures To be published in Ap.J. v633 no.2
References in corpus (4)
Cited by in corpus (25)
- Physics of Strongly Magnetized Neutron Stars
- The First Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
- Magnetars: Properties, Origin and Evolution
- Precise Gamma-Ray Timing and Radio Observations of 17 Fermi Gamma-Ray Pulsars
- Atmosphere Models of Magnetized Neutron Stars: QED Effects, Radiation Spectra, and Polarization Signals
- Pulsar Timing for the Fermi Gamma-ray Space Telescope
- Gamma-ray Pulsar Revolution
- Fermi LAT observations of the Geminga pulsar
- The X-ray Structure of the Pulsar Bow Shock G189.22+2.90 in the Supernova Remnant IC 443
- The Magnificent Seven in the dusty prairie -- The role of interstellar absorption on the observed neutron star population
- Chandra Phase-Resolved X-ray Spectroscopy of the Crab Pulsar II
- High-Resolution Timing Observations of Spin-Powered Pulsars with the AGILE Gamma-Ray Telescope
- Modeling the Surface X-ray Emission and Viewing Geometry of PSR J0821-4300 in Puppis A
- Absorption Features in the X-ray Spectrum of an Ordinary Radio Pulsar
- A broadband X-ray study of the Geminga pulsar with NuSTAR and XMM-Newton
- X-ray pulsations from the radio-quiet gamma-ray pulsar in CTA 1
- A Search for New Galactic Magnetars in Archival Chandra and XMM-Newton Observations
- UV emission from young and middle-aged pulsars: Connecting X-rays with the optical
- The Next Geminga: Search for Radio and X-ray Pulsations from the Neutron Star Identified with 3EG J1835+5918
- Possible phase-dependent absorption feature in the x-ray spectrum of the middle-aged PSR J0659+1414
- The Identification of the X-ray Counterpart to PSR J2021+4026
- XMM-Newton X-ray Detection of the High Magnetic Field Radio Pulsar PSR B1916+14
- High-energy pulsations and phase-resolved spectroscopy of PSR J1741-2054
- Is Calvera a Gamma-ray Pulsar?
- Superdense beaming of axion dark matter in the vicinity of the light cylinder of pulsars