Searching Arxiv, refresh for possibly better results.

Results for "Garritt L Page"

total 103651took 0.18s
Affinity-based measures of medical diagnostic test accuracyDec 28 2017We propose new summary measures of diagnostic test accuracy which can be used as companions to existing diagnostic accuracy measures. Conceptually, our summary measures are tantamount to the so-called Hellinger affinity and we show that they can be regarded ... More
Bayesian inferences on uncertain ranks and orderingsJul 10 2019It is common to be interested in rankings or order relationships among entities. In complex settings where one does not directly measure a univariate statistic upon which to base ranks, such inferences typically rely on statistical models having entity-specific ... More
Spatial Product Partition ModelsApr 17 2015When modeling geostatistical or areal data, spatial structure is commonly accommodated via a covariance function for the former and a neighborhood structure for the latter. In both cases the resulting spatial structure is a consequence of implicit spatial ... More
Predictions Based on the Clustering of Heterogeneous Functions via Shape and Subject-Specific CovariatesMay 11 2015We consider a study of players employed by teams who are members of the National Basketball Association where units of observation are functional curves that are realizations of production measurements taken through the course of one's career. The observed ... More
Discovering Interactions Using Covariate Informed Random Partition ModelsSep 29 2018Combination chemotherapy treatment regimens created for patients diagnosed with childhood acute lymphoblastic leukemia have had great success in improving cure rates. Unfortunately, patients prescribed these types of treatment regimens have displayed ... More
On the geometry of Bayesian inferenceJan 31 2017May 23 2018We provide a geometric interpretation to Bayesian inference that allows us to introduce a natural measure of the level of agreement between priors, likelihoods, and posteriors. The starting point for the construction of our geometry is the simple observation ... More
Density Estimation and Classification via Bayesian Nonparametric Learning of Affine SubspacesMay 28 2011It is now practically the norm for data to be very high dimensional in areas such as genetics, machine vision, image analysis and many others. When analyzing such data, parametric models are often too inflexible while nonparametric procedures tend to ... More
The Wilkinson Microwave Anisotropy ProbeJun 18 2003The Wilkinson Microwave Anisotropy Probe (WMAP) has mapped the full sky in five frequency bands between 23 and 94 GHz. The primary goal of the mission is to produce high-fidelity, all-sky, polarization-sensitive maps that can be used to study the cosmic ... More
X-ray properties of two transient ULX candidates in galaxy NGC 7090Apr 30 2019We report the X-ray data analysis of two transient ultraluminous X-ray sources (ULXs, hereafter X1 and X2) located in the nearby galaxy NGC 7090. While they were not detected in the 2004 XMM-Newton and 2005 Chandra observations, their 0.3-10 keV X-ray ... More
The Frobenius complexity of Hibi ringsJun 15 2017May 04 2018We study the Frobenius complexity of Hibi rings over fields of characteristic $p > 0$. In particular, for a certain class of Hibi rings (which we call $\omega^{(-1)}$-level), we compute the limit of the Frobenius complexity as $p \rightarrow \infty$.
DeepTag: inferring all-cause diagnoses from clinical notes in under-resourced medical domainJun 28 2018Sep 03 2018Large scale veterinary clinical records can become a powerful resource for patient care and research. However, clinicians lack the time and resource to annotate patient records with standard medical diagnostic codes and most veterinary visits are captured ... More
X-ray and UV observations of V751 Cyg in an optical high stateSep 15 2014Aims: The VY Scl system (anti-dwarf nova) V751 Cyg is examined following a claim of a super-soft spectrum in the optical low state. Methods: A serendipitous XMM-Newton X-ray observation and, 21 months later, Swift X-ray and UV observations, have provided ... More
High-Throughput Machine Learning from Electronic Health RecordsJul 03 2019The widespread digitization of patient data via electronic health records (EHRs) has created an unprecedented opportunity to use machine learning algorithms to better predict disease risk at the patient level. Although predictive models have previously ... More
Forecasting neutron star temperatures: predictability and variabilityJul 17 2013It is now possible to model thermal relaxation of neutron stars after bouts of accretion during which the star is heated out of equilibrium by nuclear reactions in its crust. Major uncertainties in these models can be encapsulated in modest variations ... More
A Measurement of the Medium-Scale Anisotropy in the Cosmic Microwave Background RadiationMay 18 1993Dec 03 1993Observations from the first flight of the Medium Scale Anisotropy Measurement (MSAM) are analyzed to place limits on Gaussian fluctuations in the Cosmic Microwave Background Radiation (CMBR). This instrument chops a 30\arcmin\ beam in a 3 position pattern ... More
Thermal and transport properties of the neutron star inner crustJan 26 2012We review the nuclear and condensed matter physics underlying the thermal and transport properties of the neutron star inner crust. These properties play a key role in interpreting transient phenomena such as thermal relaxation in accreting neutron stars, ... More
Harmony for 2-Qubit EntanglementJun 21 2019In this Letter we present a new quantity that shows whether two general qubit systems are entangled, which we call harmony. It captures the notion of separability and maximal entanglement. It is also shown that harmony is monogamous for 3-qubit states. ... More
Crust cooling of the neutron star in Aql X-1: Different depth and magnitude of shallow heating during similar accretion outburstsJul 16 2019The structure and composition of the crust of neutron stars plays an important role in their thermal and magnetic evolution, hence in setting their observational properties. One way to study the crust properties is to measure how it cools after it has ... More
A Balloon-Borne Millimeter-Wave Telescope for Cosmic Microwave Background Anisotropy MeasurementsDec 02 1995We report on the characteristics and design details of the Medium Scale Anisotropy Measurement (MSAM), a millimeter-wave, balloon-borne telescope that has been used to observe anisotropy in the Cosmic Microwave Background Radiation (CMBR) on 0\fdg5 angular ... More
Systematic effects from an ambient-temperature, continuously-rotating half-wave plateJan 22 2016Aug 20 2016We present an evaluation of systematic effects associated with a continuously-rotating, ambient-temperature half-wave plate (HWP) based on two seasons of data from the Atacama B-Mode Search (ABS) experiment located in the Atacama Desert of Chile. The ... More
Concepts of relative velocityMar 30 2011The central concept of the theory of relativity is the relativity of velocity. The velocity of a material body is not an intrinsic property of the body; it depends on a free choice of reference system. Relative velocity is thus reference-dependent, it ... More
Wilkinson Microwave Anisotropy Probe (WMAP) First Year Observations: TE PolarizationFeb 11 2003Jul 22 2003The Wilkinson Microwave Anisotropy Probe (WMAP) has mapped the full sky in Stokes I, Q, and U parameters at frequencies 23, 33, 41, 61, and 94 GHz. We detect correlations between the temperature and polarization maps significant at more than 10 standard ... More
Measuring the Expansion of the Universe Through Changes in the CMB PhotosphereJun 26 2007The expansion of the universe may be observed in ``realtime'' by measuring changes in the patterns of the anisotropy in the CMB. As the universe ages, the surface of decoupling--or the CMB photosphere--moves away from us and samples a different gravitational ... More
Measuring the Anisotropy in the CMB: Current Status & Future ProspectsNov 11 1999The CMB is perhaps the cleanest cosmological observable. Given a cosmology model, the angular spectrum of the CMB can be computed to percent accuracy. On the observational side, as far as we know, there is little that stands in the way between an accurate ... More
Swift X-Ray Observations of Classical Novae. II. The Super Soft Source sampleOct 28 2011Oct 31 2011The Swift GRB satellite is an excellent facility for studying novae. Its rapid response time and sensitive X-ray detector provides an unparalleled opportunity to investigate the previously poorly sampled evolution of novae in the X-ray regime. This paper ... More
Long range antiferromagnetic order in a rocksalt high entropy oxideFeb 03 2019We report for the first time the magnetic structure of the high entropy oxide $(Mg_{0.2}Co_{0.2}Ni_{0.2}Cu_{0.2}Zn_{0.2})O$ using neutron powder diffraction. This material exhibits a sluggish magnetic transition but possesses a long-range ordered antiferromagnetic ... More
The survival probability of critical and subcritical branching processes in finite state space Markovian environmentAug 01 2017Let $(Z_n)_{n\geqslant 0}$ be a branching process in a random environment defined by a Markov chain $(X_n)_{n\geqslant 0}$ with values in a finite state space $\mathbb X$ starting at $X_0=i \in\mathbb X$. We extend from the i.i.d. environment to the Markovian ... More
Equivalence between the phase-integral and worldline-instanton methodsApr 22 2019The phase-integral and worldline-instanton methods are two widely used methods to calculate Schwinger pair-production densities in electric fields of fixed direction that depend on just one time or space coordinate in the same fixed plane of the electromagnetic ... More
Limit theorems for affine Markov walks conditioned to stay positiveJan 12 2016Consider the real Markov walk $S_n = X_1+ \dots+ X_n$ with increments $\left(X_n\right)_{n\geq 1}$ defined by a stochastic recursion starting at $X_0=x$. For a starting point $y>0$ denote by $\tau_y$ the exit time of the process $\left( y+S_n \right)_{n\geq ... More
Collective excitations in neutron-star crustsOct 15 2013We explore the spectrum of low-energy collective excitations in the crust of a neutron star, especially in the inner region where neutron-proton clusters are immersed in a sea of superfluid neutrons. The speeds of the different modes are calculated systematically ... More
Low-energy collective excitations in the neutron star inner crustOct 18 2012Apr 11 2013We study the low-energy collective excitations of the neutron star inner crust, where a neutron superfluid coexists with a Coulomb lattice of nuclei. The dispersion relation of the modes is calculated systematically from a microscopic theory including ... More
An Efficient Pseudo-likelihood Method for Sparse Binary Pairwise Markov Network EstimationFeb 27 2017Apr 07 2017The pseudo-likelihood method is one of the most popular algorithms for learning sparse binary pairwise Markov networks. In this paper, we formulate the $L_1$ regularized pseudo-likelihood problem as a sparse multiple logistic regression problem. In this ... More
Symbolic and Ordinary Powers of Ideals in Hibi RingsSep 29 2018We exhibit a class of Hibi rings which are diagonally F-regular over fields of positive characteristic, and diagonally $F$-regular type over fields of characteristic zero, in the sense of Carvajal-Rojas and Smolkin. It follows that such Hibi rings satisfy ... More
Conditioned local limit theorems for random walks defined on finite Markov chainsJul 19 2017Let $(X_n)_{n\geq 0}$ be a Markov chain with values in a finite state space $\mathbb X$ starting at $X_0=x \in \mathbb X$ and let $f$ be a real function defined on $\mathbb X$. Set $S_n=\sum_{k=1}^{n} f(X_k)$, $n\geqslant 1$. For any $y \in \mathbb R$ ... More
The MAP Satellite Feed HornsJan 10 2003We present the design, manufacturing methods, and characterization of 20 microwave feed horns currently in use on the Microwave Anisotropy Probe (MAP) satellite. The nature of the cosmic microwave background (CMB) anisotropy requires a detailed understanding ... More
Measuring the non-Gorenstein locus of Hibi rings and normal affine semigroup ringsMar 14 2019The trace of the canonical module of a Cohen-Macaulay ring describes its non-Gorenstein locus. We study the trace of the canonical module of a Segre product of algebras, and we apply our results to compute the non-Gorenstein locus of toric rings. We provide ... More
Differential equations from unitarity cuts: nonplanar hexa-box integralsJul 30 2018Jan 02 2019We compute $\epsilon$-factorized differential equations for all dimensionally-regularized integrals of the nonplanar hexa-box topology, which contribute for instance to 2-loop 5-point QCD amplitudes. A full set of pure integrals is presented. For 5-point ... More
$W_{1+\infty}$ as a Discretization of Virasoro AlgebraNov 04 1994It is shown that the $W_{1+\infty}$ algebra is nothing but the simplest subalgebra of a $q$-discretized \vi\ algebra, in the language of the KP hierarchy explicitly.
Limit theorems for Markov walks conditioned to stay positive under a spectral gap assumptionJul 26 2016Jul 27 2016Consider a Markov chain $(X_n)_{n\geqslant 0}$ with values in the state space $\mathbb X$. Let $f$ be a real function on $\mathbb X$ and set $S_0=0,$ $S_n = f(X_1)+\cdots + f(X_n),$ $n\geqslant 1$. Let $\mathbb P_x$ be the probability measure generated ... More
Recovering Swift-XRT energy resolution through CCD charge trap mappingAug 25 2011The X-ray telescope on board the Swift satellite for gamma-ray burst astronomy has been exposed to the radiation of the space environment since launch in November 2004. Radiation causes damage to the detector, with the generation of dark current and charge ... More
$b \to s(d) γ$ with a Vector-like Quark as Fourth-generationSep 07 1994Jan 31 1995We study the implications of a vector-like quark, especially a down-type vector-like quark in $b \rightarrow s(d) \gamma$ including the neutral Higgs in the calculation. After analyzing some possible constraints for the mixing, the contribution may be ... More
Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Bayesian Estimation of CMB Polarization MapsNov 26 2008Nov 02 2009We describe a sampling method to estimate the polarized CMB signal from observed maps of the sky. We use a Metropolis-within-Gibbs algorithm to estimate the polarized CMB map, containing Q and U Stokes parameters at each pixel, and its covariance matrix. ... More
Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Beam Profiles, Data Processing, Radiometer Characterization and Systematic Error LimitsMar 17 2006Feb 27 2007The WMAP satellite has completed 3 years of observations of the cosmic microwave background radiation. The 3-year data products include several sets of full sky maps of the Stokes I, Q and U parameters in 5 frequency bands, spanning 23 to 94 GHz, and ... More
Galaxy Cluster Astrophysics and Cosmology: Questions and Opportunities for the Coming DecadeMar 03 2009We are learning much about how structure forms, in particular how clusters as nodes in the cosmic web evolve and accrete matter, and about the physical processes within these objects. In the next decade, the study of clusters will enable us to tackle ... More
Evidence for the Thermal Sunyaev-Zel'dovich Effect Associated with Quasar FeedbackOct 19 2015Mar 23 2016Using a radio-quiet subsample of the Sloan Digital Sky Survey spectroscopic quasar catalogue, spanning redshifts 0.5-3.5, we derive the mean millimetre and far-infrared quasar spectral energy distributions (SEDs) via a stacking analysis of Atacama Cosmology ... More
Constraints on Axion-like Particles and Nucleon Pairing in Dense Matter from the Hot Neutron Star in HESS J1731-347Jun 20 2018Sep 20 2018If the thermal evolution of the hot young neutron star in the supernova remnant HESS J1731-347 is driven by neutrino emission, it provides a stringent constraint on the coupling of light (mass $\ll 10$ keV) axion-like particles to neutrons. Using Markov-Chain ... More
The long-term temperature evolution of neutron stars undergoing episodic accretion outburstsJun 06 2019Transiently accreting neutron stars (NSs) in LMXBs undergo episodes of accretion, alternated with periods of quiescence. During an accretion outburst, the NS heats up due to exothermic accretion-induced processes taking place in the crust. Most of this ... More
Multi-wavelength Campaign on NGC 7469 VI. Photoionisation Modelling of the Emission Line Regions and the Warm AbsorberJul 03 2019Aims. We aim to investigate and characterise the photoionised X-ray emission line regions within NGC 7469. Methods. We apply the photoionisation model, PION, within the spectral fitting code SPEX to analyse the 640 ks RGS spectrum of NGC 7469 gathered ... More
Galactic emission at 19 GHzJul 31 1998Oct 13 1998We cross-correlate a 19 GHz full sky Cosmic Microwave Background (CMB) survey with other maps to quantify the foreground contribution. Correlations are detected with the Diffuse Infrared Background Experiment (DIRBE) 240, 140 and 100 micron maps at high ... More
Deep Belief Networks used on High Resolution Multichannel Electroencephalography Data for Seizure DetectionAug 28 2017Ubiquitous bio-sensing for personalized health monitoring is slowly becoming a reality with the increasing availability of small, diverse, robust, high fidelity sensors. This oncoming flood of data begs the question of how we will extract useful information ... More
The prompt-afterglow connection in Gamma-Ray Bursts: a comprehensive statistical analysis of Swift X-ray light-curvesMar 05 2012Oct 11 2012We present a comprehensive statistical analysis of Swift X-ray light-curves of Gamma-Ray Bursts (GRBs) collecting data from more than 650 GRBs discovered by Swift and other facilities. The unprecedented sample size allows us to constrain the REST FRAME ... More
The unusual X-ray emission of the short Swift GRB 090515: Evidence for the formation of a magnetar?Jul 13 2010Aug 24 2010The majority of short gamma-ray bursts (SGRBs) are thought to originate from the merger of compact binary systems collapsing directly to form a black hole. However, it has been proposed that both SGRBs and long gamma-ray bursts (LGRBs) may, on rare occasions, ... More
The far-infrared/radio correlation and radio spectral index of galaxies in the SFR-M* plane up to z 2Oct 27 2014[Abridged] We study the evolution of the radio spectral index and far-infrared/radio correlation (FRC) across the star-formation rate-stellar masse (i.e. SFR-M*) plane up to z 2. We start from a M*-selected sample of galaxies with reliable SFR and redshift ... More
Each H^{1/2}-stable projection yields convergence and quasi-optimality of adaptive FEM with inhomogeneous Dirichlet data in R^dJun 21 2013We consider the solution of second order elliptic PDEs in $\R^d$ with inhomogeneous Dirichlet data by means of an $h$-adaptive FEM with fixed polynomial order $p\in\N$. As model example serves the Poisson equation with mixed Dirichlet-Neumann boundary ... More
The QMAP and MAT/TOCO Experiments for Measuring Anisotropy in the Cosmic Microwave BackgroundAug 02 2001We describe two related experiments that measured the anisotropy in the cosmic microwave background (CMB). QMAP was a balloon-borne telescope that flew twice in 1996, collecting data on degree angular scales with an array of six high electron mobility ... More
Swift follow-up of gravitational wave triggers: results from the first aLIGO run and optimisation for the futureJun 15 2016Dec 20 2018During its first observing run, in late 2015, the advanced LIGO facility announced 3 gravitational wave (GW) triggers to electromagnetic follow-up partners. Two of these have since been confirmed as being of astrophysical origin: both are binary black ... More
Line Searches in Swift X-ray SpectraFeb 04 2008Prior to the launch of the Swift mission several X-ray line detections were reported in Gamma Ray Burst afterglow spectra. To date, these pre-Swift era results have not been conclusively confirmed. The most contentious issue in this area is the choice ... More
Identification of the Hard X-ray Source Dominating the E > 25 keV Emission of the Nearby Galaxy M31Mar 21 2017We report the identification of a bright hard X-ray source dominating the M31 bulge above 25 keV from a simultaneous NuSTAR-Swift observation. We find that this source is the counterpart to Swift J0042.6+4112, which was previously detected in the Swift ... More
Designs for next generation CMB survey strategies from ChileAug 15 2018New telescopes are being built to measure the Cosmic Microwave Background (CMB) with unprecedented sensitivity, including Simons Observatory (SO), CCAT-prime, the BICEP Array, SPT-3G, and CMB Stage-4. We present observing strategies for telescopes located ... More
The in-flight spectroscopic performance of the Swift XRT CCD camera during 2006-2007Aug 22 2007The Swift X-ray Telescope focal plane camera is a front-illuminated MOS CCD, providing a spectral response kernel of 135 eV FWHM at 5.9 keV as measured before launch. We describe the CCD calibration program based on celestial and on-board calibration ... More
Herschel and SCUBA-2 imaging and spectroscopy of a bright, lensed submillimetre galaxy at z = 2.3May 06 2010We present a detailed analysis of the far-IR properties of the bright, lensed, z = 2.3, SMG, SMM J2135-0102, using new observations with Herschel, SCUBA-2 and the VLA. These data allow us to constrain the galaxy's SED and show that it has an intrinsic ... More
On the redshift distribution and physical properties of ACT-selected DSFGsNov 20 2015Sep 14 2016We present multi-wavelength detections of nine candidate gravitationally-lensed dusty star-forming galaxies (DSFGs) selected at 218GHz (1.4mm) from the ACT equatorial survey. Among the brightest ACT sources, these represent the subset of the total ACT ... More
GRB 061121: Broadband spectral evolution through the prompt and afterglow phases of a bright burstApr 12 2007Swift triggered on a precursor to the main burst of GRB 061121 (z=1.314), allowing observations to be made from the optical to gamma-ray bands. Many other telescopes, including Konus-Wind, XMM-Newton, ROTSE and the Faulkes Telescope North, also observed ... More
The XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source CatalogueJul 07 2008Oct 21 2008Aims: Pointed observations with XMM-Newton provide the basis for creating catalogues of X-ray sources detected serendipitously in each field. This paper describes the creation and characteristics of the 2XMM catalogue. Methods: The 2XMM catalogue has ... More
A cooling neutron star crust after recurrent outbursts: Modelling the accretion outburst history of Aql X-1Feb 16 2018Apr 06 2018With our neutron star crust cooling code {\tt NSCool} we track the thermal evolution of the neutron star in Aql X-1 over the full accretion outburst history from 1996 until 2015. For the first time, we model many outbursts (23 outbursts were detected) ... More
No Violation of the Second Law in Extended Black Hole ThermodynamicsJun 13 2019Recently a number of papers have claimed that the horizon area - and thus the entropy - of near extremal black holes in anti-de Sitter spacetimes can be reduced by dropping particles into them. In this note we point out that this is a consequence of an ... More
Confirming the high velocity outflow in PG 1211+143Jul 06 2006Aug 11 2006An XMM-Newton observation of the bright QSO PG1211+143 was previously reported to show evidence for a massive, energetic outflow, with an outflow velocity of v~0.1c based on the identification of blue-shifted absorption lines detected in both EPIC and ... More
CMB Telescopes and Optical SystemsJun 11 2012The cosmic microwave background radiation (CMB) is now firmly established as a fundamental and essential probe of the geometry, constituents, and birth of the Universe. The CMB is a potent observable because it can be measured with precision and accuracy. ... More
An XMM-Newton observation of Mrk 3 - a Seyfert galaxy just over the edgeApr 14 2005A 100ks XMM-Newton observation of the nearby Seyfert 2 galaxy Mrk 3 offers a unique opportunity to explore the complexity of its X-ray spectrum. We find the \~3-8 keV continuum to be dominated by reflection from cold matter, with fluorescent K-shell lines ... More
A convergent linear finite element scheme for the Maxwell-Landau-Lifshitz-Gilbert equationMar 16 2013We consider a lowest-order finite element discretization of the nonlinear system of Maxwell's and Landau-Lifshitz-Gilbert equations (MLLG). Two algorithms are proposed to numerically solve this problem, both of which only require the solution of at most ... More
Star Formation in Luminous Quasars at 2<z<3Feb 08 2016We investigate the relation between star formation rates ($\dot{M}_{s}$) and AGN properties in optically selected type 1 quasars at $2<z<3$ using data from Herschel and the SDSS. We find that $\dot{\rm{M}}_s$ remains approximately constant with redshift, ... More
XMM-Newton Optical Monitor observations of LMC X-3Oct 26 2000We study the optical counterpart of the black-hole X-ray binary LMC X-3, by using XMM-Newton/OM observations carried out during a low-hard X-ray state. We derive a better constraint for the temperature, mass and radius of the companion star, and we show ... More
Minimal Cooling of Neutron Stars: A New ParadigmMar 29 2004Sep 14 2004A new classification of neutron star cooling scenarios, involving either ``minimal'' cooling or ``enhanced'' cooling is proposed. The minimal cooling scenario replaces and extends the so-called standard cooling scenario to include neutrino emission from ... More
Bremsstrahlung photons from the bare surface of a strange quark starMar 17 2004The photon emissivity from the bremsstrahlung process ee-> ee\gamma occuring in the electrosphere at the bare surface of a strange quark star is calculated. For surface temperatures T<10^9K, the photon flux exceeds that of e+e- pairs that are produced ... More
Axioms of AdaptivityDec 04 2013This paper aims first at a simultaneous axiomatic presentation of the proof of optimal convergence rates for adaptive finite element methods and second at some refinements of particular questions like the avoidance of (discrete) lower bounds, inexact ... More
Hypercritical accretion onto a magnetized neutron star surface: a numerical approachJun 15 2010The properties of a new-born neutron star, produced in a core-collapse supernova, can be strongly affected by the possible late fallback which occurs several hours after the explosion. This accretion occurs in the regime dominated by neutrino cooling, ... More
Design and Deployment of a Multichroic Polarimeter Array on the Atacama Cosmology TelescopeOct 27 2015We present the design and the preliminary on sky performance with respect to beams and pass-bands of a multichroic polarimeter array covering the 90 and 146 GHz Cosmic Microwave Background (CMB) bands and its enabling broadband optical system recently ... More
The Atacama Cosmology Telescope: The LABOCA/ACT Survey of Clusters at All RedshiftsNov 28 2014Feb 26 2015We present a multi-wavelength analysis of eleven Sunyaev Zel'dovich effect (SZE)-selected galaxy clusters (ten with new data) from the Atacama Cosmology Telescope (ACT) southern survey. We have obtained new imaging from the Large APEX Bolometer Camera ... More
Infrared observations of the 2006 outburst of the recurrent nova RS Ophiuchi: the early phaseSep 14 2006We present infrared spectroscopy of the recurrent nova RS Ophiuchi, obtained 11.81, 20.75 and 55.71 days following its 2006 eruption. The spectra are dominated by hydrogen recombination lines, together with HeI, OI and OII lines; the electron temperature ... More
Precision Epoch of Reionization studies with next-generation CMB experimentsJun 18 2014Aug 05 2014Future arcminute resolution polarization data from ground-based Cosmic Microwave Background (CMB) observations can be used to estimate the contribution to the temperature power spectrum from the primary anisotropies and to uncover the signature of reionization ... More
The SPEDE spectrometerSep 21 2017The electron spectrometer, SPEDE, has been developed and will be employed in conjunction with the Miniball spectrometer at the HIE-ISOLDE facility, CERN. SPEDE allows for direct measurement of internal conversion electrons emitted in-flight, without employing ... More
Weak-Lensing Mass Calibration of the Atacama Cosmology Telescope Equatorial Sunyaev-Zeldovich Cluster Sample with the Canada-France-Hawaii Telescope Stripe 82 SurveySep 29 2015Jul 29 2016Mass calibration uncertainty is the largest systematic effect for using clusters of galaxies to constrain cosmological parameters. We present weak lensing mass measurements from the Canada-France-Hawaii Telescope Stripe 82 Survey for galaxy clusters selected ... More
HerMES: Herschel-SPIRE observations of Lyman Break GalaxiesSep 14 2010We present first results of a study of the submillimetre (rest frame far-infrared) properties of z~3 Lyman Break Galaxies (LBGs) and their lower-redshift counterparts BX/BM galaxies, based on Herschel-SPIRE observations of the Northern field of the Great ... More
The Hot and Energetic Universe: The X-ray Integral Field Unit (X-IFU) for Athena+Aug 30 2013The Athena+ mission concept is designed to implement the Hot and Energetic Universe science theme submitted to the European Space Agency in response to the call for White Papers for the definition of the L2 and L3 missions of its science program. The ... More
HerMES: Lyman Break Galaxies individually detected at 0.7 < z < 2.0 in GOODS-N with Herschel/SPIREMay 03 2011As part of the Herschel Multi-tiered Extragalactic Survey we have investigated the rest-frame far-infrared (FIR) properties of a sample of more than 4800 Lyman Break Galaxies (LBGs) in the Great Observatories Origins Deep Survey North field. Most LBGs ... More
GRB 130427A: a Nearby Ordinary MonsterNov 20 2013Feb 04 2014Long-duration Gamma-Ray Bursts (GRBs) are an extremely rare outcome of the collapse of massive stars, and are typically found in the distant Universe. Because of its intrinsic luminosity ($L\sim 3 \times 10^{53}$ erg s$^{-1}$) and its relative proximity ... More
The Atacama Cosmology Telescope: Physical Properties of Sunyaev-Zel'dovich Effect Clusters on the Celestial EquatorOct 15 2012Jan 08 2013We present the optical and X-ray properties of 68 galaxy clusters selected via the Sunyaev-Zel'dovich Effect at 148 GHz by the Atacama Cosmology Telescope (ACT). Our sample, from an area of 504 square degrees centered on the celestial equator, is divided ... More
The Atacama Cosmology Telescope: Beam Measurements and the Microwave Brightness Temperatures of Uranus and SaturnMar 19 2013We describe the measurement of the beam profiles and window functions for the Atacama Cosmology Telescope (ACT), which operated from 2007 to 2010 with kilo-pixel bolometer arrays centered at 148, 218, and 277 GHz. Maps of Saturn are used to measure the ... More
NANOGrav Education and Outreach: Growing a Diverse and Inclusive Collaboration for Low-Frequency Gravitational Wave AstronomyJul 17 2019The new field of gravitational wave astrophysics requires a growing pool of students and researchers with unique, interdisciplinary skill sets. It also offers an opportunity to build a diverse, inclusive astronomy community from the ground up. We describe ... More
An unusual stellar death on Christmas DayMay 16 2011Oct 03 2011Long Gamma-Ray Bursts (GRBs) are the most dramatic examples of massive stellar deaths, usually as- sociated with supernovae (Woosley et al. 2006). They release ultra-relativistic jets producing non-thermal emission through synchrotron radiation as they ... More
The Atacama Cosmology Telescope: Cross Correlation with Planck mapsMar 03 2014We present the temperature power spectrum of the Cosmic Microwave Background obtained by cross-correlating maps from the Atacama Cosmology Telescope (ACT) at 148 and 218 GHz with maps from the Planck satellite at 143 and 217 GHz, in two overlapping regions ... More
Atacama Cosmology Telescope: Dusty star-forming galaxies and active galactic nuclei in the equatorial surveyMay 11 2019We present a catalog of 510 radio-loud active galactic nuclei (AGN, primarily blazars) and 287 dusty star-forming galaxies (DSFGs) detected by the Atacama Cosmology Telescope at $> 5 \sigma$ significance in frequency bands centered on 148 GHz (2 mm), ... More
A novel antiproton radial diagnostic based on octupole induced ballistic lossJul 01 2008We report results from a novel diagnostic that probes the outer radial profile of trapped antiproton clouds. The diagnostic allows us to determine the profile by monitoring the time-history of antiproton losses that occur as an octupole field in the antiproton ... More
HerMES: detection of cosmic magnification of sub-mm galaxies using angular cross-correlationJan 25 2011Cosmic magnification is due to the weak gravitational lensing of sources in the distant Universe by foreground large-scale structure leading to coherent changes in the observed number density of the background sources. Depending on the slope of the background ... More
Testing Gravity in the Outer Solar System: Results from Trans-Neptunian ObjectsMay 23 2007The inverse square law of gravity is poorly probed by experimental tests at distances of ~ 10 AUs. Recent analysis of the trajectory of the Pioneer 10 and 11 spacecraft have shown an unmodeled acceleration directed toward the Sun which was not explained ... More
Can Minor Planets be Used to Assess Gravity in the Outer Solar System?Apr 17 2005Jan 02 2006The twin Pioneer spacecraft have been tracked for over thirty years as they headed out of the solar system. After passing 20 AU from the Sun, both exhibited a systematic error in their trajectories that can be interpreted as a constant acceleration towards ... More
The Simultaneous Optical-to-X-ray Spectral Energy Distribution of Soft X-ray Selected AGN observed by SwiftJan 19 2010Feb 24 2010We report Swift observations of a sample of 92 bright soft X-ray selected active galactic nuclei (AGN). This sample represents the largest number of AGN observed to study the spectral energy distribution (SED) of AGN with simultaneous optical/UV and X-ray ... More
Rapid neutrino cooling in the neutron star MXB 1659-29Dec 29 2017We show that the neutron star in the transient system MXB~1659-29 has a core neutrino luminosity that substantially exceeds that of the modified Urca reactions (i.e., $n+n\to n+p+e^{-}+\bar{\nu}_{e}$ and inverse) and is consistent with the direct Urca ... More
Machine Learning to Predict Developmental Neurotoxicity with High-throughput Data from 2D Bio-engineered TissuesMay 06 2019There is a growing need for fast and accurate methods for testing developmental neurotoxicity across several chemical exposure sources. Current approaches, such as in vivo animal studies, and assays of animal and human primary cell cultures, suffer from ... More
Radial distribution of gas and dust in the two spiral galaxies M99 and M100May 29 2010By combining Herschel-SPIRE data with archival Spitzer, HI, and CO maps, we investigate the spatial distribution of gas and dust in the two famous grand-design spirals M99 and M100 in the Virgo cluster. Thanks to the unique resolution and sensitivity ... More