Results 71 to 80 of about 13,579 (182)

γ-Ray Pulsar Emission is Mostly Stable on Timescales from Minutes to Years

The Astrophysical Journal
We present a method for the detection and characterization of random changes in the flux from γ -ray pulsars on sub-hour timescales, much shorter than variations that can be accessed using direct flux measurements.
M. Kerr
doaj   +1 more source

Methods for calibrating a cesium atomic clock using a pulsar time-scale

Monthly Notices of the Royal Astronomical Society
ABSTRACT Some millisecond pulsars exhibit extremely high rotational stability, which can form a pulsar-based time-scale. We employed a post-correction method to evaluate the feasibility of the pulsar time-scale (PT) as a time reference to calibrate the frequency of cesium clocks getting more accurate time signals.
Linlin Wang, Zhehao Zhang, Minglei Tong
openaire   +1 more source

Research on establishing a joint time-scale of pulsar time and atomic time based on a wavelet analysis method

Monthly Notices of the Royal Astronomical Society
ABSTRACT Pulsar time has different physical mechanisms from atomic time, and these two time-scales are complementary in terms of stability performance. The joint timekeeping of pulsar and atomic time is currently an important application direction.
Xingzhi Zhu, Zhehao Zhang, Chengshi Zhao, Bian Li, Minglei Tong, Yuping Gao, Tinggao Yang   +6 more
openaire   +1 more source

Rfi Mitigation Implementation For Pulsar Radioastronomy

, 2010
International audienceThe observation of known pulsars (pulsar timing) or the search for new pulsars can be limited by radio frequency interference (RFI) generated by Telecommunications activity. In this paper we propose several RFI mitigation techniques
Ait-Allal, Dalal, Cognard, Ismaël, Dumez-Viou, Cedric, Theureau, Gilles, Weber, Rodolphe   +4 more
core   +2 more sources

Measuring scattering variations in pulsar timing observations: a test of the fidelity of current methods

Monthly Notices of the Royal Astronomical Society
ABSTRACT The turbulent nature of the ionized interstellar medium (IISM) causes dispersion measure (DM) and scattering variations in pulsar timing measurements. To improve precision of gravitational wave measurements, pulsar timing array (PTA) collaborations have begun the use of sophisticated and intricate noise modelling techniques ...
A D Kulkarni, R M Shannon, D J Reardon, M T Miles   +3 more
openaire   +2 more sources

A Novel Technique for Long-term Timing of Redback Millisecond Pulsars

The Astrophysical Journal
We present timing solutions spanning nearly two decades for five redback (RB) systems found in globular clusters (GCs), created using a novel technique that effectively “isolates” the pulsar. By accurately measuring the time of passage through periastron
Kyle A. Corcoran, Scott M. Ransom, Alexandra C. Rosenthal, Megan E. DeCesar, Paulo C. C. Freire, Jason W. T. Hessels, Ryan S. Lynch, Prajwal V. Padmanabh, Ingrid H. Stairs   +8 more
doaj   +1 more source

The Accreting Millisecond X-ray Pulsar IGR J00291+5934: Evidence for a Long Timescale Spin Evolution

, 2010
Accreting Millisecond X-ray Pulsars like IGR J00291+5934 are important because it is possible to test theories of pulsar formation and evolution. They give also the possibility to constrain gravitational wave emission theories and the equation of state ...
Alessandro Patruno, Bildsten, Bildsten, Boynton, Burderi, Campana, Chakrabarty, Chakrabarty, Chakrabarty, Cognard, di Salvo, Galloway, Galloway, Galloway, Galloway, Hartman, Hartman, Hartman, Homer, Illarionov, Jahoda, Lamb, Lamb, Markwardt, Markwardt, Miller, Patruno, Patruno, Psaltis, Radhakrishnan, Rappaport, Remillard, Romanova, Romanova, Rupen, Spitkovsky, Torres, Ustyugova   +37 more
core   +2 more sources

Probing the Universe using Pulsar Timing Arrays [PDF]

EPJ Web of Conferences
Supermassive black holes (SMBH), found at the centers of galaxies, have been observed in the early Universe, yet their rapid growth remains an open question.
Falxa Mikel
doaj   +1 more source

Autonomous Spacecraft Navigation Based on Pulsar Timing Information

, 2011
We discuss the possibility of an autonomous navigation system for spacecraft that is based on pulsar timing data. Pulsars are rapidly rotating neutron stars that are observable as variable celestial sources of electromagnetic radiation.
Becker, Werner, Bernhardt, Mike Georg, Breithuth, Ferdinand Maximilian, Prinz, Tobias, Walter, Ulrich   +4 more
core   +1 more source

A Bayesian method for pulsar template generation

, 2015
Extracting Times of Arrival from pulsar radio signals depends on the knowledge of the pulsars pulse profile and how this template is generated. We examine pulsar template generation with Bayesian methods.
Champion, D. J., Imgrund, M., Kramer, M., Lesch, H.   +3 more
core   +1 more source