output
19962026
most citedLOFAR: The LOw-Frequency ARray

2.7k citations

Showing 2017Show all

28 papers · 1 filter

astro-ph.HE2017★ 30 cited

The Einstein@Home Gamma-Ray Pulsar Survey II. Source Selection, Spectral Analysis and Multi-wavelength Follow-up

J. Wu, C. J. Clark, H. J. Pletsch +23

We report on the analysis of 13 gamma-ray pulsars discovered in the Einstein@Home blind search survey using Fermi Large Area Telescope (LAT) Pass 8 data. The 13 new gamma-ray pulsa…

astro-ph.HE2017★ 64 cited

Large magnetic field variations towards the Galactic Centre magnetar, PSR J1745-2900

Gregory Desvignes, Ralph Eatough, Ue-Li Pen +13

Polarised radio emission from PSR J1745-2900 has already been used to investigate the strength of the magnetic field in the Galactic Centre, close to Sagittarius A*. Here we report…

astro-ph.HE2017★ 1 cited

X-rays from the mode-switching PSR B0943+10

S. Mereghetti, L. Kuiper, A. Tiengo +15

New simultaneous X-ray and radio observations of the archetypal mode-switching pulsar PSR B0943+10 have been carried out with XMM-Newton and the LOFAR, LWA and Arecibo radio telesc…

astro-ph.EP2017★ 1 cited

The search for radio emission from exoplanets using LOFAR low-frequency beam-formed observations: Data pipeline and preliminary results for the 55 Cnc system

Jake D. Turner, Jean-Mathias Grießmeier, Philippe Zarka +1

Detection of radio emission from exoplanets can provide information on the star-planet system that is difficult to study otherwise, such as the planetary magnetic field, magnetosph…

astro-ph.HE2017★ 23 cited

A millisecond pulsar discovery in a survey of unidentified Fermi -ray sources with LOFAR

Z. Pleunis, C. G. Bassa, J. W. T. Hessels +7

Using LOFAR, we have performed a very-low-frequency (115-155 MHz) radio survey for millisecond pulsars (MSPs). The survey targeted 52 unidentified Fermi -ray sources. Employing…

gr-qc2017★ 112 cited

First search for nontensorial gravitational waves from known pulsars

The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1050

We present results from the first directed search for nontensorial gravitational waves. While general relativity allows for tensorial (plus and cross) modes only, a generic metric…

hep-th2017★ 32 cited

Photon sector analysis of Super and Lorentz symmetry breaking: effective photon mass, bi-refringence and dissipation

Luca Bonetti, Luís R. dos Santos Filho, José A. Helayël-Neto +1

Within the Standard Model Extension (SME), we expand our previous findings on four classes of violations of Super-Symmetry (SuSy) and Lorentz Symmetry (LoSy), differing in the hand…

astro-ph.SR2017★ 11 cited

The Association of a J-burst with a Solar Jet

D. E. Morosan, P. T. Gallagher, R. A. Fallows +56

Context. The Sun is an active star that produces large-scale energetic events such as solar flares and coronal mass ejections and numerous smaller-scale events such as solar jets.…

gr-qc2017★ 6 cited

Comment on "Acceleration of particles to high energy via gravitational repulsion in the Schwarzschild field" [Astropart. Phys. 86 (2017) 18-20]

Alessandro D. A. M. Spallicci

Comments are due on a recent paper by McGruder III (2017) in which the author deals with the concept of gravitational repulsion in the context of the Schwarzschild-Droste solution.…

astro-ph.EP2017★ 100 cited

Scientific rationale for Uranus and Neptune in situ explorations

O. Mousis, D. H. Atkinson, T. Cavalié +53

The ice giants Uranus and Neptune are the least understood class of planets in our solar system but the most frequently observed type of exoplanets. Presumed to have a small rocky…

astro-ph.HE2017★ 42 cited

A Massive-born Neutron Star with a Massive White Dwarf Companion

Ismael Cognard, Paulo C. C. Freire, Lucas Guillemot +10

We report on the results of a 4-year timing campaign of PSR~J2222, a 2.44-day binary pulsar with a massive white dwarf (WD) companion, with the Nançay, Effelsberg and Lovell…

astro-ph.HE2017★ 22 cited

The discovery of two mildly-recycled binary pulsars in the Northern High Time Resolution Universe pulsar survey

M. Berezina, D. J. Champion, P. C. C. Freire +11

We report the discovery and the results of follow-up timing observations of PSR J2045+3633 and PSR J2053+4650, two binary pulsars found in the Northern High Time Resolution Univers…

astro-ph.EP2017★ 56 cited

How Expanded Ionospheres of Hot Jupiters Can Prevent Escape of Radio Emission Generated by the Cyclotron Maser Instability

Christof Weber, Helmut Lammer, Ildar Shaikhislamov +8

We present a study of plasma conditions in the atmospheres of the Hot Jupiters HD 209458b and HD 189733b and for an HD 209458b-like planet at orbit locations between 0.2-1 AU aroun…

astro-ph.HE2017★ 81 cited

Scattering analysis of LOFAR pulsar observations

Marisa Geyer, Aris Karastergiou, Vladislav I. Kondratiev +8

We measure the effects of interstellar scattering on average pulse profiles from 13 radio pulsars with simple pulse shapes. We use data from the LOFAR High Band Antennas, at freque…

astro-ph.HE2017★ 6 cited

Observation of the Black Widow B1957+20 millisecond pulsar binary system with the MAGIC telescopes

MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +145

B1957+20 is a millisecond pulsar located in a black widow type compact binary system with a low mass stellar companion. The interaction of the pulsar wind with the companion star w…

astro-ph.HE2017★ 25 cited

Fermi observations of the LIGO event GW170104

Melissa Pesce-Rollins, Nicola Omodei, Dan Kocevski +3

We present the \emph{Fermi} Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) observations of the LIGO binary black hole merger (BBH) event GW170104. No candidate electr…

astro-ph.HE2017★ 83 cited

Evidence for an intermediate-mass black hole in the globular cluster NGC 6624

B. B. P. Perera, B. W. Stappers, A. G. Lyne +6

PSR B182030A is located in the globular cluster NGC 6624 and is the closest known pulsar to the centre of any globular cluster. We present more than 25 years of high-precision t…

astro-ph.HE2017★ 209 cited

Cosmic-ray electron+positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope

LAT Collaboration, S. Abdollahi, M. Ackermann +97

We present a measurement of the cosmic-ray electron+positron spectrum between 7 GeV and 2 TeV performed with almost seven years of data collected with the Fermi Large Area Telescop…

astro-ph.HE2017★ 413 cited

The Fermi Galactic Center GeV Excess and Implications for Dark Matter

LAT Collaboration

The region around the Galactic center (GC) is now well established to be brighter at energies of a few GeV than expected from conventional models of diffuse gamma-ray emission and…

gr-qc2017★ 1 cited

A frequency-domain implementation of the particle-without-particle approach to EMRIs

Marius Oltean, Carlos F. Sopuerta, Alessandro D. A. M. Spallicci

The gravitational waves emitted by binary systems with extreme mass ratios carry unique astrophysical information expected to be probed by the next generation of gravitational wave…

astro-ph.HE2017★ 97 cited

Observations of M31 and M33 with the Fermi Large Area Telescope: a galactic center excess in Andromeda?

LAT Collaboration

The Fermi LAT has opened the way for comparative studies of cosmic rays (CRs) and high-energy objects in the Milky Way (MW) and in other, external, star-forming galaxies. Using 2 y…

astro-ph.HE2017★ 74 cited

Gamma-ray Blazars Within the First 2 Billion Years

Large Area Telescope Collaboration

The detection of high-redshift (3) blazars enables the study of the evolution of the most luminous relativistic jets over cosmic time. More importantly, high-redshift blazars t…

astro-ph.SR2017★ 156 cited

Global Energetics of Solar Flares: V. Energy Closure in Flares and Coronal Mass Ejections

Markus J. Aschwanden, Amir Caspi, Christina M. S. Cohen +11

In this study we synthesize the results of four previous studies on the global energetics of solar flares and associated coronal mass ejections (CMEs), which include magnetic, ther…

astro-ph.SR2017★ 76 cited

Fermi-LAT Observations of High-energy Behind-the-limb Solar Flares

M. Ackermann, A. Allafort, L. Baldini +86

We report on the Fermi-LAT detection of high-energy emission from the behind-the-limb (BTL) solar flares that occurred on 2013 October 11, and 2014 January 6 and September 1. The F…