Timing analysis and pulse profile of the Vela pulsar in the optical band from Iqueye observations

Abstract

The Vela pulsar is among a number of pulsars which show detectable optical pulsations. We performed optical observations of this pulsar in January and December 2009 with the Iqueye instrument mounted at the ESO 3.5 m New Technology Telescope. Our aim was to perform phase fitting of the Iqueye data, and to measure the optical pulse profile of the Vela pulsar at high time resolution, its absolute phase and rotational period. We calculated for the first time an independent optical timing solution and obtained the most detailed optical pulse profile available to date. Iqueye detected a distinct narrow component on the top of one of the two main optical peaks, which was not resolved in previous observations, and a third statistically significant optical peak not aligned with the radio one. The quality of the Iqueye data allowed us to determine the relative time of arrival of the radio-optical-gamma-ray peaks with an accuracy of a fraction of a millisecond. We compare the shape of the Iqueye pulse profile with that observed in other energy bands and discuss its complex multi-wavelength structure.

arXiv comment9 pages, 7 figures, 6 tables

References in corpus (24)

• The NumPy array: a structure for efficient numerical computation
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• TEMPO2, a new pulsar timing package. I: Overview
• The Second Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• Tempo2, a new pulsar timing package. II: The timing model and precision estimates
• $\gamma$-Ray Pulsars: Emission Zones and Viewing Geometries
• The Vela Pulsar and its Synchrotron Nebula
• Modeling of Gamma-Ray Pulsar Light Curves with Force-Free Magnetic Field
• Beating the spin-down limit on gravitational wave emission from the Vela pulsar
• Fermi LAT Observations of the Vela Pulsar
• The distance to the Vela pulsar gauged with HST parallax oservations
• The Vela Pulsar: Results from the First Year of Fermi LAT Observations
• The soft gamma-ray pulsar population: an high-energy overview
• Uncertainties of Modeling Gamma-Ray Pulsar Light Curves with Vacuum Dipole Magnetic Field
• The Multi-Component Nature of the Vela Pulsar Nonthermal X-ray Spectrum
• Simultaneous Absolute Timing of the Crab Pulsar at Radio and Optical Wavelengths
• High-Resolution Timing Observations of Spin-Powered Pulsars with the AGILE Gamma-Ray Telescope
• Phase resolved spectroscopy of the Vela pulsar with XMM-Newton
• The Vela Pulsar in the Ultraviolet
• Multicolor Photometry of the Vela Pulsar
• An RXTE Observation of the Vela Pulsar: Filling in the X-ray Gap
• Optical phase coherent timing of the Crab nebula pulsar with Iqueye at the ESO New Technology Telescope
• Aqueye optical observations of the Crab Nebula pulsar
• ROSAT Observations of the Vela Pulsar

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