High-energy pulsations and phase-resolved spectroscopy of PSR J1741-2054

Abstract

We report the results of a deep XMM-Newton observation of the radio-faint $\gamma$-ray pulsar J1741-2054 and its nebula together with the analysis of 5 years of Fermi LAT data. The X-ray spectrum of the pulsar is consistent with an absorbed power law plus a blackbody, originating at least partly from the neutron star cooling. The nebular emission is consistent with that of a synchrotron pulsar wind nebula, with hints of spatial spectral variation. We extended the available Fermi LAT ephemeris and folded the $\gamma$-ray and X-ray data. We detected X-ray pulsations from the neutron star: both the thermal and non-thermal components are about 35-40% pulsed, with phase-aligned maxima. A sinusoid fits the thermal folded profile well. A 10-bin phase-resolved analysis shows softening of the non-thermal spectrum during the on-pulse phases. The radio, X-ray and $\gamma$-ray light curves are single-peaked, not phase-aligned, with the X-ray peak trailing the $\gamma$-ray peak by over half a rotation. Spectral considerations suggest that the most probable pulsar distance is in the 0.3-1.0 kpc range.

12 pages, 4 figures, accepted by the Astrophysical Journal

References in corpus (8)

• Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LAT
• Precise Gamma-Ray Timing and Radio Observations of 17 Fermi Gamma-Ray Pulsars
• Three Millisecond Pulsars in FERMI LAT Unassociated Bright Sources
• High-Altitude Emission from Pulsar Slot Gaps: The Crab Pulsar
• Outer-gap vs. Slot-gap Models for Pulsar High Energy Emissions: The Case of the Crab Pulsar
• Six millisecond pulsars detected by the Fermi Large Area Telescope and the radio/gamma-ray connection of millisecond pulsars
• Phase resolved spectroscopy of the Vela pulsar with XMM-Newton
• The Next Geminga: Search for Radio and X-ray Pulsations from the Neutron Star Identified with 3EG J1835+5918

Cited by in corpus (7)

• The soft gamma-ray pulsar population: an high-energy overview
• Radio-quiet and radio-loud pulsars: similar in Gamma-rays but different in X-rays
• X-ray analysis of the proper motion and pulsar wind nebula for PSR J1741-2054
• On the puzzling high-energy pulsations of the energetic radio-quiet $\gamma$-ray pulsar J1813$-$1246
• Spectral characterization of the non-thermal X-ray emission of gamma-ray pulsars
• A high-magnetic-field radio pulsar survey with Swift/XRT
• The middle-aged pulsar PSR J1741-2054 and its bow-shock nebula in far ultraviolet