Deep Chandra observations of TeV binaries II: LS 5039

Abstract

We report on Chandra observations of the TeV emitting High Mass X-ray Binary LS 5039, for a total exposure of ~70ks, using the ACIS-S camera in Continuos Clocking mode to search for a possible X-ray pulsar in this system. We did not find any periodic or quasi-periodic signal in the 0.3-0.4 and 0.75-0.9 orbital phases, and in a frequency range of 0.005-175 Hz. We derived an average pulsed fraction 3sigma upper limit for the presence of a periodic signal of ~15% (depending on the frequency and the energy band), the deepest limit ever reached for this object. If the X-ray emission of LS 5039 is due (at least in part) to a rotational powered pulsar, the latter is either spinning faster than ~5.6 ms, or having a beam pointing away from our line of sight, or contributing to ~15% of the total X-ray emission of the system in the orbital phases we observed.

9 pages, 5 figures, MNRAS in press

References in corpus (17)

• The ATNF Pulsar Catalogue
• TEMPO2, a new pulsar timing package. I: Overview
• Magnetar-like Emission from the Young Pulsar in Kes 75
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• Orbital X-Ray Variability of the Microquasar LS 5039
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• Distance Determination to the Crab-like PWN G54.1+0.3 and Search for its Supernova Remnant Shell
• Pulsar wind zone processes in LS 5039
• Discovery of a Young, Energetic 70.5 ms Pulsar Associated with the TeV Gamma-ray Source HESS J1837-069
• First X-ray observations of the young pulsar J1357-6429
• Swift/XRT monitoring of five orbital cycles of LSI +61 303
• Long-term X-ray monitoring of LS I +61 303: analysis of spectral variability and flares
• Extended X-ray emission in the vicinity of the microquasar LS 5039: pulsar wind nebula?
• X-ray Timing Observations of PSR J1930+1852 in the Crab-like SNR G54.1+0.3

Cited by in corpus (22)

• Gamma-ray binaries and related systems
• The gas-to-extinction ratio and the gas distribution in the Galaxy
• Long-term monitoring of the high-energy gamma-ray emission from LS I +61° 303 and LS 5039
• A magnetar-like event from LS I +61 303 and its nature as a gamma-ray binary
• On the binary nature of the gamma-ray sources AGL J2241+4454 (=MWC 656) and HESS J0632+057 (=MWC 148)
• Sign of hard X-ray pulsation from the gamma-ray binary system LS 5039
• Large-scale flow dynamics and radiation in pulsar gamma-ray binaries
• Discovery of the Galactic High-Mass Gamma-ray Binary 4FGL J1405.1-6119
• Periodic morphological changes in the radio structure of the gamma-ray binary LS 5039
• Physical properties of the gamma-ray binary LS 5039 through low and high frequency radio observations
• Direct Wind Accretion and Jet Launch in Binary Systems
• NuSTAR observation of LS 5039
• Estimating the contribution of Galactic sources to the diffuse neutrino flux
• On the origin of LS 5039 and PSR J1825-1446
• GeV detection of HESS J0632+057
• The missing GeV γ-ray binary: Searching for HESS J0632+057 with Fermi-LAT
• Search for radio pulsations in LS I +61 303
• Impact of the orbital uncertainties on the timing of pulsars in binary systems
• Chandra Imaging of Gamma-Ray Binaries
• Broad-Band High-Energy Emission of the Gamma-ray Binary System LS 5039: Spectral and Temporal Features using NuSTAR and Fermi Observations
• NuSTAR Hard X-ray Observation of the Gamma-ray Binary Candidate HESS J1832-093
• Gamma-ray binaries beyond one-zone models: an application to LS 5039