text stringlengths 89 2.49k | category stringclasses 19
values |
|---|---|
Safeguarding Old and New Journal Tables for the VO: Status for
Extragalactic and Radio Data: Independent of established data centers, and partly for my own research,
since 1989 I have been collecting the tabular data from over 2600 articles
concerned with radio sources and extragalactic objects in general. Optical
ch... | astro-ph_IM |
Wavelet transforms of microlensing data: Denoising, extracting intrinsic
pulsations, and planetary signals: Wavelets are waveform functions that describe transient and unstable
variations, such as noises. In this work, we study the advantages of discrete
and continuous wavelet transforms (DWT and CWT) of microlensing... | astro-ph_IM |
The DESI Experiment Part II: Instrument Design: DESI (Dark Energy Spectropic Instrument) is a Stage IV ground-based dark
energy experiment that will study baryon acoustic oscillations and the growth
of structure through redshift-space distortions with a wide-area galaxy and
quasar redshift survey. The DESI instrument i... | astro-ph_IM |
$\texttt{GWFAST}$: a Fisher information matrix Python code for
third-generation gravitational-wave detectors: We introduce $\texttt{GWFAST}$, a Fisher information matrix $\texttt{Python}$
code that allows easy and efficient estimation of signal-to-noise ratios and
parameter measurement errors for large catalogs of re... | astro-ph_IM |
A fast new catadioptric design for fiber-fed spectrographs: The next generation of massively multiplexed multi-object spectrographs
(DESpec, SUMIRE, BigBOSS, 4MOST, HECTOR) demand fast, efficient and affordable
spectrographs, with higher resolutions (R = 3000-5000) than current designs.
Beam-size is a (relatively) free... | astro-ph_IM |
Three-dimensional extinction mapping using Gaussian random fields: We present a scheme for using stellar catalogues to map the three-dimensional
distributions of extinction and dust within our Galaxy. Extinction is modelled
as a Gaussian random field, whose covariance function is set by a simple
physical model of the I... | astro-ph_IM |
INTEGRAL/IBIS nine-year Galactic Hard X-Ray Survey: Context. The INTEGRAL observatory operating in a hard X-ray/gamma domain has
gathered a large observational data set over nine years starting in 2003. Most
of the observing time was dedicated to the Galactic source population study,
making possible the deepest Galacti... | astro-ph_IM |
gSeaGen: a GENIE-based code for neutrino telescopes: The gSeaGen code is a GENIE based application to generate neutrino-induced
events in an underwater neutrino detector. The gSeaGen code is able to generate
events induced by all neutrino flavours, taking into account topological
differences between track-type and show... | astro-ph_IM |
Spectro-photometric distances to stars: a general-purpose Bayesian
approach: We developed a code that estimates distances to stars using measured
spectroscopic and photometric quantities. We employ a Bayesian approach to
build the probability distribution function over stellar evolutionary models
given these data, de... | astro-ph_IM |
Smoothed Particle Radiation Hydrodynamics: Two-Moment method with Local
Eddington Tensor Closure: We present a new radiative transfer method (SPH-M1RT) that is coupled
dynamically with smoothed particle hydrodynamics (SPH). We implement it in the
(task-based parallel) SWIFT galaxy simulation code but it can be
straig... | astro-ph_IM |
Dealing with missing data in the MICROSCOPE space mission: An adaptation
of inpainting to handle colored-noise data: The MICROSCOPE space mission, launched on April 25, 2016, aims to test the
weak equivalence principle (WEP) with a 10^-15 precision. To reach this
performance requires an accurate and robust data analy... | astro-ph_IM |
Data Release 2 of S-PLUS: accurate template-fitting based photometry
covering $\sim$1000 square degrees in 12 optical filters: The Southern Photometric Local Universe Survey (S-PLUS) is an ongoing survey
of $\sim$9300 deg$^2$ in the southern sky in a 12-band photometric system. This
paper presents the second data rel... | astro-ph_IM |
Fast and Automated Peak Bagging with DIAMONDS (FAMED): Stars of low and intermediate mass that exhibit oscillations may show tens of
detectable oscillation modes each. Oscillation modes are a powerful to
constrain the internal structure and rotational dynamics of the star, hence
tool allowing one to obtain an accurate ... | astro-ph_IM |
Searching for changing-state AGNs in massive datasets -- I: applying
deep learning and anomaly detection techniques to find AGNs with anomalous
variability behaviours: The classic classification scheme for Active Galactic Nuclei (AGNs) was
recently challenged by the discovery of the so-called changing-state
(changi... | astro-ph_IM |
Simulation of ionizing radiation in cell phone camera image sensors: The Distributed Electronic Cosmic-ray Observatory (DECO) is a cell phone app
that uses a cell phone camera image sensor to detect cosmic-ray particles and
particles from radioactive decay. Images recorded by DECO are classified by a
convolutional neur... | astro-ph_IM |
Design and optimization of dihedral angle offsets for the next
generation lunar retro-reflectors: Lunar laser ranging (LLR) to the Apollo retro-reflectors, which features the
most long-lasting experiment in testing General Relativity theories, has
remained operational over the past four decades. To date, with signifi... | astro-ph_IM |
Atmospheric effects on extensive air showers observed with the Surface
Detector of the Pierre Auger Observatory: Atmospheric parameters, such as pressure (P), temperature (T) and density,
affect the development of extensive air showers initiated by energetic cosmic
rays. We have studied the impact of atmospheric vari... | astro-ph_IM |
Prototype Schwarzschild-Couder Telescope for the Cherenkov Telescope
Array: Commissioning Status of the Optical System: The Cherenkov Telescope Array (CTA), with more than 100 telescopes, will be
the largest ever ground-based gamma-ray observatory and is expected to greatly
improve on both gamma-ray detection sensiti... | astro-ph_IM |
PulsarX: a new pulsar searching package -I. A high performance folding
program for pulsar surveys: Pulsar surveys with modern radio telescopes are becoming increasingly
computationally demanding. This is particularly true for wide field-of-view
pulsar surveys with radio interferometers, and those conducted in real or... | astro-ph_IM |
A new ray-tracing scheme for 3D diffuse radiation transfer on highly
parallel architectures: We present a new numerical scheme to solve the transfer of diffuse radiation
on three-dimensional mesh grids which is efficient on processors with highly
parallel architecture such as recently popular GPUs and CPUs with multi... | astro-ph_IM |
HAWC response to atmospheric electricity activity: The HAWC Gamma Ray observatory consists of 300 water Cherenkov detectors
(WCD) instrumented with four photo multipliers tubes (PMT) per WCD. HAWC is
located between two of the highest mountains in Mexico. The high altitude (4100
m asl), the relatively short distance to... | astro-ph_IM |
Measurements of Charge Transfer Efficiency in a Proton-irradiated Swept
Charge Device: Charge Coupled Devices (CCDs) have been successfully used in several low
energy X-ray astronomical satellite over the past two decades. Their high
energy resolution and high spatial resolution make them an perfect tool for low
ener... | astro-ph_IM |
First Impressions: Early-Time Classification of Supernovae using Host
Galaxy Information and Shallow Learning: Substantial effort has been devoted to the characterization of transient
phenomena from photometric information. Automated approaches to this problem
have taken advantage of complete phase-coverage of an eve... | astro-ph_IM |
What could KIDSpec, a new MKID spectrograph, do on the ELT?: Microwave Kinetic Inductance Detectors (MKIDs) are beginning to become more
prominent in astronomical instrumentation, due to their sensitivity, low noise,
high pixel count for superconducting detectors, and inherent energy and time
resolving capability. The ... | astro-ph_IM |
A Digital Broadband Beamforming Architecture for 2-PAD: We describe an hierarchical, frequency-domain beamforming architecture for
synthesising a sky beam from the wideband antenna feeds of digital aperture
arrays. The development of densely-packed, all-digital aperture arrays is an
important area of research required ... | astro-ph_IM |
Even simpler modeling of quadruply lensed quasars (and random quartets)
using Witt's hyperbola: Witt (1996) has shown that for an elliptical potential, the four images of a
quadruply lensed quasar lie on a rectangular hyperbola that passes through the
unlensed quasar position and the center of the potential as well. ... | astro-ph_IM |
A Cyber Infrastructure for the SKA Telescope Manager: The Square Kilometre Array Telescope Manager (SKA TM) will be responsible for
assisting the SKA Operations and Observation Management, carrying out System
diagnosis and collecting Monitoring & Control data from the SKA sub-systems and
components. To provide adequate... | astro-ph_IM |
Mid-band gravitational wave detection with precision atomic sensors: We assess the science reach and technical feasibility of a satellite mission
based on precision atomic sensors configured to detect gravitational radiation.
Conceptual advances in the past three years indicate that a two-satellite
constellation with s... | astro-ph_IM |
Focus Demo: CANFAR+Skytree: A Cloud Computing and Data Mining System for
Astronomy: This is a companion Focus Demonstration article to the CANFAR+Skytree poster
(Ball 2012), demonstrating the usage of the Skytree machine learning software
on the Canadian Advanced Network for Astronomical Research (CANFAR) cloud
compu... | astro-ph_IM |
Study of hadron and gamma-ray acceptance of the MAGIC telescopes:
towards an improved background estimation: The MAGIC telescopes are an array of two imaging atmospheric Cherenkov
telescopes (IACTs) studying the gamma ray sky at very high-energies (VHE; E>100
GeV). The observations are performed in stereoscopic mode,... | astro-ph_IM |
Demonstrating the Concept of Parallax with James Webb Space Telescope: We measured the parallax of the James Webb Space Telescope based on near
simultaneous observations using the Lulin One-meter Telescope and the GROWTH
India Telescope, separated at a distance of ~4214 km. This serves a great
demonstration for the con... | astro-ph_IM |
High Cadence Optical Transient Searches using Drift Scan Imaging III:
Development of an Inexpensive Drive Control System and Characterisation and
Correction of Drive System Periodic Errors: In order to further develop and implement novel drift scan imaging
experiments to undertake wide field, high time resolution s... | astro-ph_IM |
Electric sail control mode for amplified transverse thrust: The electric solar wind sail produces thrust by centrifugally spanned high
voltage tethers interacting with the solar wind protons. The sail attitude can
be controlled and attitude maneuvers are possible by tether voltage modulation
synchronous with the sail r... | astro-ph_IM |
Current status of Shanghai VLBI correlator: Shanghai Astronomical Observatory has upgraded its DiFX cluster to 420 CPU
cores and a 432-TB storage system at the end of 2014. An international network
connection for the raw data transfer has also been established. The routine
operations for IVS sessions including CRF, AOV... | astro-ph_IM |
The SFXC software correlator for Very Long Baseline Interferometry:
Algorithms and Implementation: In this paper a description is given of the SFXC software correlator,
developed and maintained at the Joint Institute for VLBI in Europe (JIVE). The
software is designed to run on generic Linux-based computing clusters.... | astro-ph_IM |
An optical test bench for the precision characterization of absolute
quantum efficiency for the TESS CCD detectors: The Transiting Exoplanet Survey Satellite (TESS) will search for planets
transiting bright stars with Ic<13. TESS has been selected by NASA for launch
in 2018 as an Astrophysics Explorer mission, and is... | astro-ph_IM |
Summary of the 3rd BINA Workshop: BINA-3 has been the third workshop of this series involving scientists from
India and Belgium aimed at fostering future joint research in the view of
cutting-edge observatories and advances in theory. BINA-3 was held at the
Graphic Era Hill University, 22-24 March 2023 at Bhimtal (near... | astro-ph_IM |
Simulation of ultra-high energy photon propagation with PRESHOWER 2.0: In this paper we describe a new release of the PRESHOWER program, a tool for
Monte Carlo simulation of propagation of ultra-high energy photons in the
magnetic field of the Earth. The PRESHOWER program is designed to calculate
magnetic pair producti... | astro-ph_IM |
Gaia astrometry for stars with too few observations - a Bayesian
approach: Gaia's astrometric solution aims to determine at least five parameters for
each star, together with appropriate estimates of their uncertainties and
correlations. This requires at least five distinct observations per star. In
the early data re... | astro-ph_IM |
Visible astro-comb filtered by a passively-stabilized Fabry-Perot cavity: We demonstrate a compact 29.3 GHz visible astro-comb covering the spectrum
from 560nm to 700nm. A 837 MHz Yb:fiber laser frequency comb phase locked to a
Rb clock served as the seed comb to ensure the frequency stability and high
side mode suppre... | astro-ph_IM |
Characterization Of Inpaint Residuals In Interferometric Measurements of
the Epoch Of Reionization: Radio Frequency Interference (RFI) is one of the systematic challenges
preventing 21cm interferometric instruments from detecting the Epoch of
Reionization. To mitigate the effects of RFI on data analysis pipelines,
nu... | astro-ph_IM |
Simultaneous analysis of large INTEGRAL/SPI datasets: optimizing the
computation of the solution and its variance using sparse matrix algorithms: Nowadays, analyzing and reducing the ever larger astronomical datasets is
becoming a crucial challenge, especially for long cumulated observation times.
The INTEGRAL/SPI X-... | astro-ph_IM |
Why should we keep measuring zenital dependence of muon flux? Results
obtained at Campinas (SP) BR: The zenital dependence of muon flux which reaches the earth's surface is well
known as proportional to cos^n(\theta). Generally, for practical purposes and
simplicity in calculations, n is taken as 2. However, compilat... | astro-ph_IM |
Optical calibration of large format adaptive mirrors: Adaptive (or deformable) mirrors are widely used as wavefront correctors in
adaptive optics systems. The optical calibration of an adaptive mirror is a
fundamental step during its life-cycle: the process is in facts required to
compute a set of known commands to ope... | astro-ph_IM |
Numerical Strategies of Computing the Luminosity Distance: We propose two efficient numerical methods of evaluating the luminosity
distance in the spatially flat {\Lambda}CDM universe. The first method is based
on the Carlson symmetric form of elliptic integrals, which is highly accurate
and can replace numerical quadr... | astro-ph_IM |
Investigation of Residual Blaze Functions in Slit-Based Echelle
Spectrograph: We have studied the Residual Blaze Functions (RBF) resulting from division of
individual echelle orders by extracted flat-field in spectra obtained by
slit-fed OES spectrograph of 2m telescope of Ond\v{r}ejov observatory, Czech
Republic. We... | astro-ph_IM |
FACT - The First G-APD Cherenkov Telescope: Status and Results: The First G-APD Cherenkov telescope (FACT) is the first telescope using
silicon photon detectors (G-APD aka. SiPM). It is built on the mount of the
HEGRA CT3 telescope, still located at the Observatorio del Roque de los
Muchachos, and it is successfully in... | astro-ph_IM |
Dishing up the Data: A Decade of Space Missions: The past decade has seen Parkes once again involved in a wide range of space
tracking activities that have added to its illustrious legacy. This
contribution is a personal recollection of those tracking efforts - both real
and celluloid. We begin in a light-hearted vein ... | astro-ph_IM |
High Contrast and High Angular Imaging at Subaru Telescope: Adaptive Optics projects at Subaru Telescope span a wide field of
capabilities ranging from ground-layer adaptive optics (GLAO) providing partial
correction over a 20 arcmin FOV to extreme adaptive optics (ExAO) for exoplanet
imaging. We describe in this paper... | astro-ph_IM |
POLARIX: a pathfinder mission of X-ray polarimetry: Since the birth of X-ray astronomy, spectral, spatial and timing observation
improved dramatically, procuring a wealth of information on the majority of the
classes of the celestial sources. Polarimetry, instead, remained basically
unprobed. X-ray polarimetry promises... | astro-ph_IM |
S-ACF: A selective estimator for the autocorrelation function of
irregularly sampled time series: We present a generalised estimator for the autocorrelation function, S-ACF,
which is an extended version of the standard estimator of the autocorrelation
function (ACF). S-ACF is a versatile definition that can robustly ... | astro-ph_IM |
Optimising LSST Observing Strategy for Weak Lensing Systematics: The LSST survey will provide unprecedented statistical power for measurements
of dark energy. Consequently, controlling systematic uncertainties is becoming
more important than ever. The LSST observing strategy will affect the
statistical uncertainty and ... | astro-ph_IM |
Astronomy and the new SI: In 2019 the International System of units (SI) conceptually re-invented
itself. This was necessary because quantum-electronic devices had become so
precise that the old SI could no longer calibrate them. The new system defines
values of fundamental constants (including $c,h,k,e$ but not $G$) a... | astro-ph_IM |
Astro2020 Science White Paper: Science Platforms for Resolved Stellar
Populations in the Next Decade: Over the past decade, research in resolved stellar populations has made great
strides in exploring the nature of dark matter, in unraveling the star
formation, chemical enrichment, and dynamical histories of the Milk... | astro-ph_IM |
The Zwicky Transient Facility: The Zwicky Transient Facility (ZTF) is a next-generation optical synoptic
survey that builds on the experience and infrastructure of the Palomar
Transient Factory (PTF). Using a new 47 deg$^2$ survey camera, ZTF will survey
more than an order of magnitude faster than PTF to discover rare ... | astro-ph_IM |
Reconstructing inclined extensive air showers from radio measurements: We present a reconstruction algorithm for extensive air showers with zenith
angles between 65$^\circ$ and 85$^\circ$ measured with radio antennas in the
30-80 MHz band. Our algorithm is based on a signal model derived from CoREAS
simulations which e... | astro-ph_IM |
PolarLight: a CubeSat X-ray Polarimeter based on the Gas Pixel Detector: The gas pixel detector (GPD) is designed and developed for high-sensitivity
astronomical X-ray polarimetry, which is a new window about to open in a few
years. Due to the small mass, low power, and compact geometry of the GPD, we
propose a CubeSat... | astro-ph_IM |
The Jiao Tong University Spectroscopic Telescope Project: The Jiao Tong University Spectroscopic Telescope (JUST) is a 4.4-meter f/6.0
segmentedmirror telescope dedicated to spectroscopic observations. The JUST
primary mirror is composed of 18 hexagonal segments, each with a diameter of
1.1 m. JUST provides two Nasmyth... | astro-ph_IM |
Towards a data-driven model of the sky from low Earth orbit as observed
by the Hubble Space Telescope: The sky observed by space telescopes in Low Earth Orbit (LEO) can be
dominated by stray light from multiple sources including the Earth, Sun and
Moon. This stray light presents a significant challenge to missions th... | astro-ph_IM |
Lattice Boltzmann Method for Electromagnetic Wave Propagation: We present a new Lattice Boltzmann (LB) formulation to solve the Maxwell
equations for electromagnetic (EM) waves propagating in a heterogeneous medium.
By using a pseudo-vector discrete Boltzmann distribution, the scheme is shown
to reproduce the continuum... | astro-ph_IM |
Characterizing Variable Stars in a Single Night with LSST: Stars exhibit a bewildering variety of variable behaviors ranging from
explosive magnetic flares to stochastically changing accretion to periodic
pulsations or rotations. The principal LSST surveys will have cadences too
sparse and irregular to capture most of ... | astro-ph_IM |
Tails: Chasing Comets with the Zwicky Transient Facility and Deep
Learning: We present Tails, an open-source deep-learning framework for the
identification and localization of comets in the image data of the Zwicky
Transient Facility (ZTF), a robotic optical time-domain survey currently in
operation at the Palomar Ob... | astro-ph_IM |
Extreme-value modelling for the significance assessment of periodogram
peaks: I propose a new procedure to estimate the False Alarm Probability, the
measure of significance for peaks of periodograms. The key element of the new
procedure is the use of generalized extreme-value distributions, the limiting
distribution ... | astro-ph_IM |
HCF (HREXI Calibration Facility): Mapping out sub-pixel level responses
from high resolution Cadmium Zinc Telluride (CZT) imaging X-ray detectors: The High Resolution Energetic X-Ray Imager (HREXI) CZT detector development
program at Harvard is aimed at developing tiled arrays of finely pixelated CZT
detectors for us... | astro-ph_IM |
Disentangled Representation Learning for Astronomical Chemical Tagging: Modern astronomical surveys are observing spectral data for millions of
stars. These spectra contain chemical information that can be used to trace the
Galaxy's formation and chemical enrichment history. However, extracting the
information from spe... | astro-ph_IM |
Design and modeling of a moderate-resolution astronomic spectrograph
with volume-phase holographic gratings: We present an optical design of astronomic spectrograph based on a cascade of
volume-phase holographic gratings. The cascade consists of three gratings. Each
of them provides moderately high spectral resolutio... | astro-ph_IM |
Using Virtual Observatory with Python: querying remote astronomical
databases: This tutorial is devoted to extending an existing catalogue with data taken
elsewhere, either from CDS Vizier or Simbad database. As an example, we used
the so-called 'Spectroscopic Survey of Stars in the Solar Neighborhood' (aka.
S4N, All... | astro-ph_IM |
Synthesizing carbon nanotubes in space: Context. As the 4th most abundant element in the universe, carbon (C) is
widespread in the interstellar medium (ISM) in various allotropic forms (e.g.,
fullerenes have been identified unambiguously in many astronomical
environments, the presence of polycyclic aromatic hydrocarbon... | astro-ph_IM |
Statistical framework for estimating GNSS bias: We present a statistical framework for estimating global navigation satellite
system (GNSS) non-ionospheric differential time delay bias. The biases are
estimated by examining differences of measured line integrated electron
densities (TEC) that are scaled to equivalent v... | astro-ph_IM |
Atmospheric transparency in the optical and near IR range above the
Shatdzhatmaz summit: The study of atmospheric extinction based on the MASS data has been carried
out using the classical photometric pairs method. The extinction in V band can
be estimated at 0.m 19. The water vapour content has been derived from GPS... | astro-ph_IM |
Non-LTE radiation hydrodynamics in PLUTO: Modeling the dynamics of most astrophysical structures requires an adequate
description of the radiation-matter interaction. Several numerical
(magneto)hydrodynamics codes were upgraded with a radiation module to fulfill
this request. However, those among them that use either t... | astro-ph_IM |
Timing Calibration of the NuSTAR X-ray Telescope: The Nuclear Spectroscopic Telescope Array (NuSTAR) mission is the first
focusing X-ray telescope in the hard X-ray (3-79 keV) band. Among the phenomena
that can be studied in this energy band, some require high time resolution and
stability: rotation-powered and accreti... | astro-ph_IM |
Solar diameter with 2012 Venus transit: The role of Venus and Mercury transits is crucial to know the past history of
the solar diameter. Through the W parameter, the logarithmic derivative of the
radius with respect to the luminosity, the past values of the solar luminosity
can be recovered. The black drop phenomenon ... | astro-ph_IM |
Simons Observatory Large Aperture Telescope Receiver Design Overview: The Simons Observatory (SO) will make precision temperature and polarization
measurements of the cosmic microwave background (CMB) using a series of
telescopes which will cover angular scales between one arcminute and tens of
degrees and sample frequ... | astro-ph_IM |
Digital Signal Processing in Cosmology: We address the problem of discretizing continuous cosmological signals such
as a galaxy distribution for further processing with Fast Fourier techniques.
Discretizing, in particular representing continuous signals by discrete sets of
sample points, introduces an enormous loss of ... | astro-ph_IM |
A Frequency Selective Surface based focal plane receiver for the OLIMPO
balloon-borne telescope: We describe here a focal plane array of Cold-Electron Bolometer (CEB)
detectors integrated in a Frequency Selective Surface (FSS) for the 350 GHz
detection band of the OLIMPO balloon-borne telescope. In our architecture, ... | astro-ph_IM |
Efficient Catalog Matching with Dropout Detection: Not only source catalogs are extracted from astronomy observations. Their sky
coverage is always carefully recorded and used in statistical analyses, such as
correlation and luminosity function studies. Here we present a novel method for
catalog matching, which inheren... | astro-ph_IM |
Reproducibility of the First Image of a Black Hole in the Galaxy M87
from the Event Horizon Telescope (EHT) Collaboration: This paper presents an interdisciplinary effort aiming to develop and share
sustainable knowledge necessary to analyze, understand, and use published
scientific results to advance reproducibility... | astro-ph_IM |
Rapid search for massive black hole binary coalescences using deep
learning: The coalescences of massive black hole binaries are one of the main targets
of space-based gravitational wave observatories. Such gravitational wave
sources are expected to be accompanied by electromagnetic emissions. Low
latency detection o... | astro-ph_IM |
Experimental study of clusters in dense granular gas and implications
for the particle stopping time in protoplanetary disks: In protoplanetary disks, zones of dense particle configuration promote planet
formation. Solid particles in dense clouds alter their motion through
collective effects and back reaction to the ... | astro-ph_IM |
Performance update of an event-type based analysis for the Cherenkov
Telescope Array: The Cherenkov Telescope Array (CTA) will be the next-generation observatory
in the field of very-high-energy (20 GeV to 300 TeV) gamma-ray astroparticle
physics. The traditional approach to data analysis in this field is to apply
qu... | astro-ph_IM |
Polarized wavelets and curvelets on the sphere: The statistics of the temperature anisotropies in the primordial cosmic
microwave background radiation field provide a wealth of information for
cosmology and for estimating cosmological parameters. An even more acute
inference should stem from the study of maps of the po... | astro-ph_IM |
HEIDI: An Automated Process for the Identification and Extraction of
Photometric Light Curves from Astronomical Images: The production of photometric light curves from astronomical images is a very
time-consuming task. Larger data sets improve the resolution of the light
curve, however, the time requirement scales wi... | astro-ph_IM |
Exploring a search for long-duration transient gravitational waves
associated with magnetar bursts: Soft gamma repeaters and anomalous X-ray pulsars are thought to be magnetars,
neutron stars with strong magnetic fields of order $\mathord{\sim}
10^{13}$--$10^{15} \, \mathrm{gauss}$. These objects emit intermittent bu... | astro-ph_IM |
The EPOCH Project: I. Periodic variable stars in the EROS-2 LMC database: The EPOCH (EROS-2 periodic variable star classification using machine
learning) project aims to detect periodic variable stars in the EROS-2 light
curve database. In this paper, we present the first result of the
classification of periodic variab... | astro-ph_IM |
Towards time symmetric N-body integration: Computational efficiency demands discretised, hierarchically organised, and
individually adaptive time-step sizes (known as the block-step scheme) for the
time integration of N-body models. However, most existing N-body codes adapt
individual step sizes in a way that violates ... | astro-ph_IM |
Search for Continuous Gravitational Wave Signals in Pulsar Timing
Residuals: A New Scalable Approach with Diffusive Nested Sampling: Detecting continuous nanohertz gravitational waves (GWs) generated by
individual close binaries of supermassive black holes (CB-SMBHs) is one of the
primary objectives of pulsar timing ... | astro-ph_IM |
The POLARBEAR-2 and Simons Array Focal Plane Fabrication Status: We present on the status of POLARBEAR-2 A (PB2-A) focal plane fabrication.
The PB2-A is the first of three telescopes in the Simon Array (SA), which is an
array of three cosmic microwave background (CMB) polarization sensitive
telescopes located at the PO... | astro-ph_IM |
A Method To Characterize the Wide-Angle Point Spread Function of
Astronomical Images: Uncertainty in the wide-angle Point Spread Function (PSF) at large angles
(tens of arcseconds and beyond) is one of the dominant sources of error in a
number of important quantities in observational astronomy. Examples include the
s... | astro-ph_IM |
Systematic Serendipity: A Test of Unsupervised Machine Learning as a
Method for Anomaly Detection: Advances in astronomy are often driven by serendipitous discoveries. As
survey astronomy continues to grow, the size and complexity of astronomical
databases will increase, and the ability of astronomers to manually sco... | astro-ph_IM |
The Radio Detector of the Pierre Auger Observatory -- status and
expected performance: As part of the ongoing AugerPrime upgrade of the Pierre Auger Observatory, we
are deploying short aperiodic loaded loop antennas measuring radio signals from
extensive air showers in the 30-80 MHz band on each of the 1,660 surface
... | astro-ph_IM |
Radio Weak Lensing Shear Measurement in the Visibility Domain - II.
Source Extraction: This paper extends the method introduced in Rivi et al. (2016b) to measure
galaxy ellipticities in the visibility domain for radio weak lensing surveys.
In that paper we focused on the development and testing of the method for the
... | astro-ph_IM |
The ARCADE 2 Instrument: The second generation Absolute Radiometer for Cosmology, Astrophysics, and
Diffuse Emission (ARCADE 2) instrument is a balloon-borne experiment to measure
the radiometric temperature of the cosmic microwave background and Galactic and
extra-Galactic emission at six frequencies from 3 to 90 GHz.... | astro-ph_IM |
Science Platforms for Heliophysics Data Analysis: We recommend that NASA maintain and fund science platforms that enable
interactive and scalable data analysis in order to maximize the scientific
return of data collected from space-based instruments. | astro-ph_IM |
MuSCAT2: four-color Simultaneous Camera for the 1.52-m Telescopio Carlos
Sánchez: We report the development of a 4-color simultaneous camera for the 1.52~m
Telescopio Carlos S\'anchez (TCS) in the Teide Observatory, Canaries, Spain.
The new instrument, named MuSCAT2, has a capability of 4-color simultaneous
imaging i... | astro-ph_IM |
Rejection criteria based on outliers in the KiDS photometric redshifts
and PDF distributions derived by machine learning: The Probability Density Function (PDF) provides an estimate of the
photometric redshift (zphot) prediction error. It is crucial for current and
future sky surveys, characterized by strict requirem... | astro-ph_IM |
The Effects of Improper Lighting on Professional Astronomical
Observations: Europe and a number of countries in the world are investing significant
amounts of public money to operate and maintain large, ground-based
astronomical facilities. Even larger projects are under development to observe
the faintest and most r... | astro-ph_IM |
The surface detector array of the Telescope Array experiment: The Telescope Array (TA) experiment, located in the western desert of
Utah,USA, is designed for observation of extensive air showers from extremely
high energy cosmic rays. The experiment has a surface detector array surrounded
by three fluorescence detector... | astro-ph_IM |
Soft proton scattering at grazing incidence from X-ray mirrors: analysis
of experimental data in the framework of the non-elastic approximation: Astronomical X-ray observatories with grazing incidence optics face the
problem of pseudo-focusing of low energy protons from the mirrors towards the
focal plane. Those prot... | astro-ph_IM |
Studying the Impact of Optical Aberrations on Diffraction-Limited Radial
Velocity Instruments: Spectrographs nominally contain a degree of quasi-static optical aberrations
resulting from the quality of manufactured component surfaces, imperfect
alignment, design residuals, thermal effects, and other other associated
... | astro-ph_IM |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.