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We present the pulsar_spectra software repository, an open-source pulsar flux density catalogue and automated spectral fitting software that finds the best spectral model and produces publication-quality plots. The Python-based software…

高能天体物理现象 · 物理学 2022-11-09 N. A. Swainston , C. P. Lee , S. J. McSweeney , N. D. R. Bhat

The velocity and density distribution of $e^\pm$ in the pulsar wind are crucial distinction among magnetosphere models, and contains key parameters determining the high energy emission of pulsar binaries. In this work, a direct method is…

高能天体物理现象 · 物理学 2017-10-11 Shu-Xu Yi , K. S. Cheng

The presence of a body in an orbit around a close eclipsing binary star manifests itself through the light time effect influencing the observed times of eclipses as the close binary and the circumbinary companion both move around the common…

地球与行星天体物理 · 物理学 2015-05-18 P. Sybilski , M. Konacki , S. Kozłowski

Analysis of transit times in exoplanetary systems accurately provides an instantaneous orbital period, $P(t)$, of their member planets. A long-term monitoring of those transiting planetary systems puts limits on the variability of $P(t)$,…

广义相对论与量子宇宙学 · 物理学 2016-03-21 Kento Masuda , Yasushi Suto

The Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES) has monitored 37 sub-arcsecond binary systems to determine whether their Keplerian orbits are perturbed by faint astrometric companions to either star. Software…

天体物理学 · 物理学 2008-11-26 Matthew W. Muterspaugh , Benjamin F. Lane , S. R. Kulkarni , B. F. Burke , M. M. Colavita , M. Shao

The continuous nanohertz gravitational waves (GWs) from individual supermassive binary black holes (SMBBHs) can be encoded in the timing residuals of pulsar timing arrays (PTAs). For each pulsar, the residuals actually contain an Earth term…

高能天体物理现象 · 物理学 2022-04-28 Jie-Wen Chen , Yan Wang

We describe a data format currently in use amongst European institutions for exchanging and archiving pulsar data. The format is designed to be as flexible as possible with regard to present and future compatibility with different operating…

A Data Access Protocol has been set up to search and retrieve Planetary Science data in general. This protocol will allow the user to select a subset of data from an archive in a standard way, based on the IVOA Table Access Protocol (TAP).…

天体物理仪器与方法 · 物理学 2017-05-25 S. Erard , B. Cecconi , P. Le Sidaner , J. Berthier , F. Henry , M. Molinaro , M. Giardino , N. Bourrel , N. Andre , M. Gangloff , C. Jacquey , F. Topf

The PSRIX backend is the primary pulsar timing instrument of the Effelsberg 100-m radio telescope since early 2011. This new ROACH-based system enables bandwidths up to 500 MHz to be recorded, significantly more than what was possible with…

天体物理仪器与方法 · 物理学 2016-03-23 P. Lazarus , R. Karuppusamy , E. Graikou , R. N. Caballero , D. J. Champion , K. J. Lee , J. P. W. Verbiest , M. Kramer

Pulse profile modelling (PPM) is a technique for inferring mass, radius and hotspot properties of millisecond pulsars. PPM is now regularly used for analysis of rotation-powered millisecond pulsars (RMPs) with data from the Neutron Star…

Binary systems anchor many of the fundamental relations relied upon in asteroseismology. Masses and radii are rarely constrained better than when measured via orbital dynamics and eclipse depths. Pulsating binaries have much to offer. They…

太阳与恒星天体物理 · 物理学 2019-01-09 Simon J. Murphy

The Kepler space mission is devoted to finding Earth-size planets in habitable zones orbiting other stars. Its large, 105-deg field-of-view features over 156,000 stars that are observed continuously to detect and characterize planet…

We propose a pulsar candidate cross matching algorithm to sift radio pulsar search candidates from repeated observations of the same sky location such as globular clusters, high energy sources, or supernova remnants. Our method uses both…

高能天体物理现象 · 物理学 2026-03-12 Qiuyu Yu , Yujie Wang , Zhichen Pan , Zhongli Zhang , Lei Qian , Zhongzu Wu , Ralph P. Eatough , Dejiang Yin , Baoda Li , Yujie Chen , Yinfeng Dai , Yifeng Li

We present a detailed mathematical analysis of the Fourier response of binary pulsar signals whose frequencies are modulated by circular orbital motion. The fluctuation power spectrum of such signals is found to be \nu_orb-periodic over a…

天体物理学 · 物理学 2009-11-07 S. Jouteux , R. Ramachandran , B. W. Stappers , P. Jonker , M. van der Klis

This paper describes a comprehensive measurement model for the error budget of pulse arrival times with emphasis on intrinsic pulse jitterand plasma propagation effects (particularly interstellar scattering), which are stochastic in time…

天体物理仪器与方法 · 物理学 2010-10-20 J. M. Cordes , R. M. Shannon

The wideband timing technique enables the high-precision simultaneous estimation of pulsar Times of Arrival (ToAs) and Dispersion Measures (DMs) while effectively modeling frequency-dependent profile evolution. We present two novel…

We develop parallel predictive entropy search (PPES), a novel algorithm for Bayesian optimization of expensive black-box objective functions. At each iteration, PPES aims to select a batch of points which will maximize the information gain…

机器学习 · 计算机科学 2015-11-24 Amar Shah , Zoubin Ghahramani

We present results from the high precision timing analysis of the pulsar-white dwarf (WD) binary PSR J1012+5307 using 15 years of multi-telescope data. Observations were performed regularly by the European Pulsar Timing Array (EPTA)…

The Parkes Multibeam (PM) survey has found nearly 50% of the >1400 known pulsars and detected 20% of the pulsars in binary systems (75% within the survey area), few of these are millisecond pulsars with orbits of less than one day. It is…

The Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES) monitored 51 subarcsecond binary systems to evaluate whether tertiary companions as small as Jovian planets orbited either the primary or secondary stars,…

地球与行星天体物理 · 物理学 2015-05-20 Matthew W. Muterspaugh , Benjamin F. Lane , S. R. Kulkarni , Maciej Konacki , Bernard F. Burke , M. M. Colavita , M. Shao