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Searches for gravitational-wave signals are often based on maximizing a detection statistic over a bank of waveform templates, covering a given parameter space with a variable level of correlation. Results are often evaluated using a…

广义相对论与量子宇宙学 · 物理学 2022-02-15 Rodrigo Tenorio , Luana M. Modafferi , David Keitel , Alicia M. Sintes

We describe an efficient algorithm for calculating the statistics of weak lensing by large-scale structure based on a tiled set of independent particle-mesh N-body simulations which telescope in resolution along the line of sight. This…

天体物理学 · 物理学 2008-11-26 Martin White , Wayne Hu

Pulsars are the most numerous class of Galactic gamma-ray sources detected by the Fermi Large Area Telescope (LAT). Young pulsars occasionally experience sudden timing discontinuities called glitches, characterized by rapid changes in…

高能天体物理现象 · 物理学 2026-01-08 Giovanni Cozzolongo , Alessio Fiori , Massimiliano Razzano , Pablo M. Saz Parkinson

Inspired by increase of population of $\gamma$-ray emitting pulsars by the $Fermi$ telescope, we perform a population study for $\gamma$-ray emitting canonical pulsars. We use a Monte-Carlo technique to simulate the Galactic population of…

高能天体物理现象 · 物理学 2015-05-20 J. Takata , Y. Wang , K. S. Cheng

Since 2013 round-the-clock monitoring of the sky is carried out simultaneously in 96 space beams using the high-sensitivity radio telescope of LPA (Large Phased Array) at the frequency 110.25 MHz. These observations are made under the…

高能天体物理现象 · 物理学 2018-08-15 V. M. Malofeev , S. A. Tyul'bashev

We present radio intensity and polarisation profiles of 28 $\gamma$-ray-detected pulsars with the aim of putting constraints on their viewing geometries using data from the Parkes telescope. Constraints are formed both from the…

高能天体物理现象 · 物理学 2015-06-23 S. C. Rookyard , P. Weltevrede , S. Johnston

Observations by Fermi LAT enabled us to explore the population of non-recycled gamma-ray pulsars with the set of 89 objects. It was recently noted that there are apparent differences in properties of radio-quiet and radio-loud subsets. In…

高能天体物理现象 · 物理学 2017-01-17 E. V. Sokolova , G. I. Rubtsov

In our previous paper, we developed a technique for identifying pulsar candidates in interferometric radio images using their distinctive scintillation signatures. Building on this technique, the present study simulates a pulsar population…

天体物理仪器与方法 · 物理学 2026-01-06 Jitendra Salal , Shriharsh P. Tendulkar , Visweshwar Ram Marthi

HESS J1813$-$178 is a very-high-energy $\gamma$-ray source spatially coincident with the young and energetic pulsar PSR J1813$-$1749 and thought to be associated with its pulsar wind nebula (PWN). Recently, evidence for extended high-energy…

高能天体物理现象 · 物理学 2024-06-12 F. Aharonian , F. Ait Benkhali , J. Aschersleben , H. Ashkar , M. Backes , A. Baktash , V. Barbosa Martins , J. Barnard , R. Batzofin , Y. Becherini , D. Berge , K. Bernlöhr , B. Bi , M. Böttcher , C. Boisson , J. Bolmont , M. de Bony de Lavergne , J. Borowska , M. Bouyahiaoui , M. Breuhaus , R. Brose , F. Brun , B. Bruno , T. Bulik , C. Burger-Scheidlin , S. Caroff , S. Casanova , R. Cecil , J. Celic , M. Cerruti , P. Chambery , T. Chand , A. Chen , J. Chibueze , O. Chibueze , G. Cotter , J. Damascene Mbarubucyeye , A. Djannati-Ataï , A. Dmytriiev , V. Doroshenko , S. Einecke , J. -P. Ernenwein , K. Feijen , M. Filipovic , G. Fontaine , M. Füßling , S. Funk , S. Gabici , Y. A. Gallant , S. Ghafourizadeh , G. Giavitt , D. Glawion , J. F. Glicenstein , P. Goswami , G. Grolleron , M. -H. Grondin , J. A. Hinton , W. Hofmann , T. L. Holch , M. Holler , M. Jamrozy , F. Jankowsky , V. Joshi , I. Jung-Richardt , K. Katarzyński , R. Khatoon , B. Khélifi , S. Klepser , W. Kluźniak , Nu. Komin , K. Kosack , D. Kostunin , A. Kundu , R. G. Lang , S. Le Stum , F. Leitl , A. Lemière , M. Lemoine-Goumard , J. -P. Lenain , F. Leuschner , J. Mackey , D. Malyshev , D. Malyshev , V. Marandon , P. Marinos , G. Martí-Devesa , R. Marx , A. Mehta , A. Mitchell , R. Moderski , L. Mohrmann , A. Montanari , E. Moulin , T. Murach , M. de Naurois , J. Niemiec , A. Priyana Noel , P. O'Brien , S. Ohm , L. Olivera-Nieto , E. de Ona Wilhelmi , M. Ostrowski , S. Panny , M. Panter , R. D. Parsons , D. A. Prokhorov , G. Pühlhofer , M. Punch , A. Quirrenbach , M. Regeard , P. Reichherzer , A. Reimer , O. Reimer , H. Ren , M. Renaud , B. Reville , F. Rieger , G. Roellinghoff , B. Rudak , V. Sahakian , H. Salzmann , M. Sasaki , F. Schüssler , H. M. Schutte , J. N. S. Shapopi , A. Specovius , S. Spencer , R. Steenkamp , S. Steinmassl , C. Steppa , I. Sushch , H. Suzuki , T. Takahashi , T. Tanaka , R. Terrier , M. Tluczykont , N. Tsuji , T. Unbehaun , C. van Eldik , M. Vecchi , J. Veh , C. Venter , J. Vink , T. Wach , S. J. Wagner , A. Wierzcholska , M. Zacharias , D. Zargaryan , A. A. Zdziarski , S. Zouari , N. Żywucka

Pulsar timing array projects measure the pulse arrival times of millisecond pulsars for the primary purpose of detecting nanohertz-frequency gravitational waves. The measurements include contributions from a number of astrophysical and…

Using the 100-m Effelsberg radio telescope operating at 1.36 GHz, we have performed a targeted radio pulsar survey of 289 unassociated gamma-ray sources discovered by the Large Area Telescope (LAT) aboard the Fermi satellite and published…

Some pulsars have their maximum observable energy output in the gamma-ray band, offering the possibility of using these high-energy photons as probes of the particle acceleration and interaction processes in pulsar magnetospheres. After an…

天体物理学 · 物理学 2009-06-23 D. J. Thompson

Here we report on a new survey for pulsars and transients in the 10 pc region around Sgr A* using the Effelsberg radio telescope at frequencies between 4 to 8 GHz. Our calibrated full-Stokes data were searched for pulsars and transients…

高能天体物理现象 · 物理学 2026-02-11 G. Desvignes , R. P. Eatough , Y. Men , F. Abbate , R. Karuppusamy , M. Kramer , K. Liu , L. Shao , P. Torne , R. S. Wharton

In this paper we derive an exact full expression for the 2D probability distribution of the ellipticity of an object measured from data, only assuming Gaussian noise in pixel values. This is a generalisation of the probability distribution…

宇宙学与河外天体物理 · 物理学 2015-06-17 Massimo Viola , Thomas Kitching , Benjamin Joachimi

The Horvitz-Thompson (HT) estimator is widely used in survey sampling. However, the variance of the HT estimator becomes large when the inclusion probabilities are highly heterogeneous. To overcome this shortcoming, in this paper, a…

统计方法学 · 统计学 2018-04-13 Xianpeng Zong , Rong Zhu , Guohua Zou

We show the results of our analysis of the pulse broadening phenomenon in 25 pulsars at several frequencies using the data gathered with GMRT and Effelsberg radiotelescopes. Twenty two of these pulsars were not studied in that regard before…

高能天体物理现象 · 物理学 2015-06-16 Wojciech Lewandowski , Marta Dembska , Jaroslaw Kijak , Magdalena Kowalinska

Citation distributions are lognormal. We use 30 lognormally distributed synthetic series of numbers that simulate real series of citations to investigate the consistency of the h index. Using the lognormal cumulative distribution function,…

数字图书馆 · 计算机科学 2021-01-11 Ricardo Brito , Alonso Rodríguez Navarro

The population of $\gamma$-ray emitting millisecond pulsars (MSPs) is studied by using Monte-Carlo techniques. We simulate the Galactic distributions of the MSPs, and apply the outer gap model for the $\gamma$-ray emission from each…

高能天体物理现象 · 物理学 2017-02-22 J. Takata , Y. Wang , K. S. Cheng

During its first 2 years of mission the Fermi-LAT instrument discovered more than 1,800 gamma-ray sources in the 100 MeV to 100 GeV range. Despite the application of advanced techniques to identify and associate the Fermi-LAT sources with…

高能天体物理现象 · 物理学 2016-03-02 David Salvetti

A new "self-calibrated" statistical analysis method has been developed for the reduction of nulling interferometry data. The idea is to use the statistical distributions of the fluctuating null depth and beam intensities to retrieve the…

天体物理仪器与方法 · 物理学 2011-03-25 Hanot Charles , Mennesson Bertrand , Martin Stefan , Liewer Kurt , Loya Frank , Mawet Dimitri , Riaud Pierre , Absil Olivier , Serabyn Eugene