764 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University College DublinIE182 papers
- Center for Astrophysics Harvard & SmithsonianUS167 papers
- Purdue University West LafayetteUS154 papers
- McGill UniversityCA153 papers
- University of California, Santa CruzUS151 papers
- Washington University in St. LouisUS150 papers
- Iowa State UniversityUS149 papers
- University of California, Los AngelesUS149 papers
- University of UtahUS149 papers
- Columbia UniversityUS138 papers
- Munster Technological UniversityIE138 papers
- University of ChicagoUS138 papers
34 papers · 1 filter
Gamma rays from the quasar PKS 1441+25: story of an escape
A. U. Abeysekara, S. Archambault, A. Archer +103
Outbursts from gamma-ray quasars provide insights on the relativistic jets of active galactic nuclei and constraints on the diffuse radiation fields that fill the Universe. The det…
Multiwavelength Study of Quiescent States of Mrk 421 with Unprecedented Hard X-Ray Coverage Provided by NuSTAR in 2013
M. Baloković, D. Paneque, G. Madejski +305
We present coordinated multiwavelength observations of the bright, nearby BL Lac object Mrk 421 taken in 2013 January-March, involving GASP-WEBT, Swift, NuSTAR, Fermi-LAT, MAGIC, V…
Renormalization Scheme Dependence in a QCD Cross Section
Farrukh Chishtie, D. G. C. McKeon, T. N. Sherry
The zero to four loop contribution to the cross section for hadrons, when combined with the renormalization group equation, allows for…
On the Complexity of Multiplication in the Iwahori--Hecke Algebra of the Symmetric Group
Alice C. Niemeyer, Götz Pfeiffer, Cheryl E. Praeger
We present new efficient data structures for elements of Coxeter groups of type and their associated Iwahori--Hecke algebras . Usually, elements of are repre…
A recent change in the optical and γ-ray polarization of the Crab nebula and pulsar
Paul Moran, Gillian Kyne, Christian Gouiffes +5
We report on observations of the polarization of optical and γ-ray photons from the Crab nebula and pulsar system using the Galway Astronomical Stokes Polarimeter (GASP), the Hubbl…
VLT polarimetry observations of PSR B0656+14
R. P. Mignani, P. Moran, A Shearer +5
Optical polarisation measurements are key tests for different models of the pulsar magnetosphere. Furthermore, comparing the relative orientation of the phase-averaged linear polar…
First NuSTAR Observations of Mrk 501 within a Radio to TeV Multi-Instrument Campaign
A. Furniss, K. Noda, S. Boggs +273
We report on simultaneous broadband observations of the TeV-emitting blazar Markarian 501 between 1 April and 10 August 2013, including the first detailed characterization of the s…
A morpho-kinematic and spectroscopic study of the bipolar nebulae: M 2-9, Mz 3, and Hen 2-104
Niall Clyne, Stavros Akras, Wolfgang Steffen +3
Context. Complex bipolar shapes can be generated either as a planetary nebula or a symbiotic system. The origin of the material ionised by the white dwarf is very different in thes…
An investigation of the Eigenvalue Calibration Method (ECM) using GASP for non-imaging and imaging detectors
Gillian Kyne, David Lara, Gregg Hallinan +2
Polarised light from astronomical targets can yield a wealth of information about their source radiation mechanisms, and about the geometry of the scattered light regions. Optical…
Solving underdetermined systems with error-correcting codes
Ted Hurley
In an underdetermined system of equations , where is an matrix, only of the entries of with are known. Thus , called `measurements', are…
Infall, outflow, and turbulence in massive star-forming cores in the G333 giant molecular cloud
N. Lo, B. Wiles, M. P. Redman +5
We present molecular line imaging observations of three massive molecular outflow sources, G333.6-0.2, G333.1-0.4, and G332.8-0.5, all of which also show evidence for infall, withi…
Generic Quantum Walks with Memory
Dan Li, Michael Mc Gettrick, Fei Gao +2
Quantum walks with memory(QWM) are a type of modified quantum walks that record the walker's latest path. As we know, only two kinds of QWM are presented up to now. It is desired t…
Magnetospherically driven optical and radio aurorae at the end of the stellar main sequence
G. Hallinan, S. P. Littlefair, G. Cotter +12
Aurorae are detected from all the magnetized planets in our Solar System, including Earth. They are powered by magnetospheric current systems that lead to the precipitation of ener…
VERITAS detection of -ray flaring activity from the BL Lac object 1ES 1727+502 during bright moonlight observations
S. Archambault, A. Archer, M. Beilicke +80
During moonlit nights, observations with ground-based Cherenkov telescopes at very high energies (VHE, GeV) are constrained since the photomultiplier tubes (PMTs) in the te…
Representations of group rings and groups
Ted Hurley
An isomorphism between the group ring of a finite group and a ring of certain block diagonal matrices is established. The group ring of a finite group is isomorphic to the…
Initial Stress Symmetry and Applications in Elasticity
Artur L. Gower, Pasquale Ciarletta, Michel Destrade
An initial stress within a solid can arise to support external loads or from processes such as thermal expansion in inert matter or growth and remodelling in living materials. For…
Sparsification of Matrices and Compressed Sensing
Fintan Hegarty, Padraig Ó Catháin, Yunbin Zhao
Compressed sensing is a signal processing technique whereby the limits imposed by the Shannon--Nyquist theorem can be exceeded provided certain conditions are imposed on the signal…
Uniform convergence on a Bakhvalov-type mesh using the preconditioning approach: Technical report
Thái Anh Nhan, Relja Vulanović
The linear singularly perturbed convection-diffusion problem in one dimension is considered and its discretization on a Bakhvalov-type mesh is analyzed. The preconditioning techniq…
Witnessing the Emergence of a Carbon Star
L. Guzman-Ramirez, E. Lagadec, R. Wesson +9
During the late stages of their evolution, Sun-like stars bring the products of nuclear burning to the surface. Most of the carbon in the Universe is believed to originate from sta…
Geometric dimension of lattices in classical simple Lie groups
Javier Aramayona, Dieter Degrijse, Conchita Martinez-Perez +1
We prove that if is a lattice in a classical simple Lie group , then the symmetric space of is -equivariantly homotopy equivalent to a proper cocompact -CW complex…
Cholesky factorisation of linear systems coming from finite difference approximations of singularly perturbed problems
Thái Anh Nhan, Niall Madden
We consider the solution of large linear systems of equations that arise when two-dimensional singularly perturbed reaction-diffusion equations are discretized. Standard methods fo…
Equivariant vector bundles over classifying spaces for proper actions
Dieter Degrijse, Ian J. Leary
Let be an infinite discrete group and let be a classifying space for proper actions of . Every -equivariant vector bundle over gives ris…
Circular polarisation of synchrotron radiation in high magnetic fields
Diarmaid de Búrca, Andrew Shearer
The general model for incoherent synchrotron radiation has long been known, with the first theory being published by Westfold in and continued by Westfold and Legg in …
Planck 2015 results. X. Diffuse component separation: Foreground maps
Planck Collaboration, R. Adam, P. A. R. Ade +236
Planck has mapped the microwave sky in nine frequency bands between 30 and 857 GHz in temperature and seven bands between 30 and 353 GHz in polarization. In this paper we consider…