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Unrolling PALM for sparse semi-blind source separation: Sparse Blind Source Separation (BSS) has become a well established tool for a
wide range of applications - for instance, in astrophysics and remote sensing.
Classical sparse BSS methods, such as the Proximal Alternating Linearized
Minimization (PALM) algorithm, ne... | astro-ph_IM |
ATLAS Probe: Breakthrough Science of Galaxy Evolution, Cosmology, Milky
Way, and the Solar System: ATLAS (Astrophysics Telescope for Large Area Spectroscopy) is a concept for a
NASA probe-class space mission. It is the spectroscopic follow-up mission to
WFIRST, boosting its scientific return by obtaining deep NIR & M... | astro-ph_IM |
Speckle Suppression Through Dual Imaging Polarimetry, and a Ground-Based
Image of the HR 4796A Circumstellar Disk: We demonstrate the versatility of a dual imaging polarimeter working in
tandem with a Lyot coronagraph and Adaptive Optics to suppress the highly
static speckle noise pattern--the greatest hindrance to g... | astro-ph_IM |
Characterization of the seismic field at Virgo and improved estimates of
Newtonian-noise suppression by recesses: Fluctuations of gravitational forces cause so-called Newtonian noise (NN) in
gravitational-wave (GW) detectors which is expected to limit their
low-frequency sensitivity in upcoming observing runs. Seismi... | astro-ph_IM |
An Updated Ultraviolet Calibration for the Swift/UVOT: We present an updated calibration of the Swift/UVOT broadband ultraviolet
(uvw1, uvm2, and uvw2) filters. The new calibration accounts for the ~1% per
year decline in the UVOT sensitivity observed in all filters, and makes use of
additional calibration sources with... | astro-ph_IM |
Influence of the Earth on the background and the sensitivity of the GRM
and ECLAIRs instruments aboard the Chinese-French mission SVOM: SVOM (Space-based multi-band astronomical Variable Object Monitor) is a
future Chinese-French satellite mission which is dedicated to Gamma-Ray Burst
(GRB) studies. Its anti-solar po... | astro-ph_IM |
Background studies for acoustic neutrino detection at the South Pole: The detection of acoustic signals from ultra-high energy neutrino
interactions is a promising method to measure the tiny flux of cosmogenic
neutrinos expected on Earth. The energy threshold for this process depends
strongly on the absolute noise leve... | astro-ph_IM |
Data downloaded via parachute from a NASA super-pressure balloon: In April to May 2023, the superBIT telescope was lifted to the Earth's
stratosphere by a helium-filled super-pressure balloon, to acquire astronomical
imaging from above (99.5% of) the Earth's atmosphere. It was launched from New
Zealand then, for 40 day... | astro-ph_IM |
21 cm observations: calibration, strategies, observables: This chapter aims to provide a review of the basics of 21 cm interferometric
observations and its methodologies. A summary of the main concepts of radio
interferometry and their connection with the 21 cm observables - power spectra
and images - is presented. I t... | astro-ph_IM |
On-sky closed loop correction of atmospheric dispersion for
high-contrast coronagraphy and astrometry: Adaptive optic (AO) systems delivering high levels of wavefront correction
are now common at observatories. One of the main limitations to image quality
after wavefront correction comes from atmospheric refraction. ... | astro-ph_IM |
MKID, an energy sensitive superconducting detector for the next
generation of XAO: Selected for the next generation of adaptive optics (AO) systems, the pyramid
wavefront sensor (PWFS) is recognised for its closed AO loop performance. As
new technologies are emerging, it is necessary to explore new methods to
improve... | astro-ph_IM |
Experimental Realization of an Achromatic Magnetic Mirror based on
Metamaterials: Our work relates to the use of metamaterials engineered to realize a
meta-surface approaching the exotic properties of an ideal object not observed
in nature, a "magnetic mirror". Previous realizations were based on resonant
structures ... | astro-ph_IM |
Extended-Path Intensity Correlation: Microarcsecond Astrometry with an
Arcsecond Field of View: We develop in detail a recently proposed optical-path modification of
astronomical intensity interferometers. Extended-Path Intensity Correlation
(EPIC) introduces a tunable path extension, enabling differential astrometry... | astro-ph_IM |
Deep learning of quasar lightcurves in the LSST era: Deep learning techniques are required for the analysis of synoptic
(multi-band and multi-epoch) light curves in massive data of quasars, as
expected from the Vera C. Rubin Observatory Legacy Survey of Space and Time
(LSST). In this follow-up study, we introduced an u... | astro-ph_IM |
GAMMA-LIGHT: High-Energy Astrophysics above 10 MeV: High-energy phenomena in the cosmos, and in particular processes leading to
the emission of gamma- rays in the energy range 10 MeV - 100 GeV, play a very
special role in the understanding of our Universe. This energy range is indeed
associated with non-thermal phenome... | astro-ph_IM |
A Real-time Coherent Dedispersion Pipeline for the Giant Metrewave Radio
Telescope: A fully real-time coherent dedispersion system has been developed for the
pulsar back-end at the Giant Metrewave Radio Telescope (GMRT). The dedispersion
pipeline uses the single phased array voltage beam produced by the existing
GMRT... | astro-ph_IM |
A graph-based spectral classification of Type II supernovae: Given the ever-increasing number of time-domain astronomical surveys,
employing robust, interpretative, and automated data-driven classification
schemes is pivotal. Based on graph theory, we present new data-driven
classification heuristics for spectral data.... | astro-ph_IM |
Single-pulse classifier for the LOFAR Tied-Array All-sky Survey: Searches for millisecond-duration, dispersed single pulses have become a
standard tool used during radio pulsar surveys in the last decade. They have
enabled the discovery of two new classes of sources: rotating radio transients
and fast radio bursts. How... | astro-ph_IM |
Unsupervised self-organised mapping: a versatile empirical tool for
object selection, classification and redshift estimation in large surveys: We present an application of unsupervised machine learning - the
self-organised map (SOM) - as a tool for visualising, exploring and mining the
catalogues of large astronomica... | astro-ph_IM |
The Burke-Gaffney Observatory: A fully roboticized remote-access
observatory with a low resolution spectrograph: We describe the current state of the Burke-Gaffney Observatory (BGO) at Saint
Mary's University - a unique fully roboticized remote-access observatory that
allows students to carry out imaging, photometry,... | astro-ph_IM |
Towards the MICADO@ELT PSF-R with simulated and real data: Observations close to the diffraction limit, with high Strehl ratios from
Adaptive Optics (AO)-assisted instruments mounted on ground-based telescopes
are a reality and will become even more widespread with the next generation
instruments that equip 30 meter-cl... | astro-ph_IM |
First Light for the First Station of the Long Wavelength Array: The first station of the Long Wavelength Array (LWA1) was completed in April
2011 and is currently performing observations resulting from its first call for
proposals in addition to a continuing program of commissioning and
characterization observations. T... | astro-ph_IM |
Pipe3D, a pipeline to analyze Integral Field Spectroscopy data: I. New
fitting phylosophy of FIT3D: We present an improved version of FIT3D, a fitting tool for the analysis of
the spectroscopic properties of the stellar populations and the ionized gas
derived from moderate resolution spectra of galaxies. FIT3D is a t... | astro-ph_IM |
The Ecological Impact of High-performance Computing in Astrophysics: The importance of computing in astronomy continues to increase, and so is its
impact on the environment. When analyzing data or performing simulations, most
researchers raise concerns about the time to reach a solution rather than its
impact on the en... | astro-ph_IM |
emcee: The MCMC Hammer: We introduce a stable, well tested Python implementation of the
affine-invariant ensemble sampler for Markov chain Monte Carlo (MCMC) proposed
by Goodman & Weare (2010). The code is open source and has already been used in
several published projects in the astrophysics literature. The algorithm ... | astro-ph_IM |
Analysis of Galactic molecular cloud polarization maps: a review of the
methods: The Davis-Chandrasekhar-Fermi (DCF) method using the Angular Dispersion
Function (ADF), the Histogram of Relative Orientations (HROs) and the
Polarization-Intensity Gradient Relation (P-IGR) are the most common tools used
to analyse maps... | astro-ph_IM |
ASTRO2020 White Paper: JWST: Probing the Epoch of Reionization with a
Wide Field Time-Domain Survey: A major scientific goal of JWST is to probe the epoch of re-ionization of the
Universe at z above 6, and up to 20 and beyond. At these redshifts, galaxies
are just beginning to form and the observable objects are earl... | astro-ph_IM |
Testing the variation of fundamental constants by astrophysical methods:
overview and prospects: By measuring the fundamental constants in astrophysical objects one can test
basic physical principles as space-time invariance of physical laws along with
probing the applicability limits of the standard model of particl... | astro-ph_IM |
On the measurements of numerical viscosity and resistivity in Eulerian
MHD codes: We propose a simple ansatz for estimating the value of the numerical
resistivity and the numerical viscosity of any Eulerian MHD code. We test this
ansatz with the help of simulations of the propagation of (magneto)sonic waves,
Alfven w... | astro-ph_IM |
The Pierre Auger Observatory Upgrade - Preliminary Design Report: The Pierre Auger Observatory has begun a major Upgrade of its already
impressive capabilities, with an emphasis on improved mass composition
determination using the surface detectors of the Observatory. Known as
AugerPrime, the upgrade will include new 4... | astro-ph_IM |
Possibility of Terahertz Observations at the ALMA site: Observational rates under terahertz (THz) opacities less than 3.0 and 2.0 at
the Atacama Large Millimeter/submillimeter Array (ALMA) site have been
calculated using the 225 GHz tipping radiometer monitoring data and the opacity
correlation between 225 GHz and THz ... | astro-ph_IM |
Detecting Dispersed Radio Transients in Real Time Using Convolutional
Neural Networks: We present a methodology for automated real-time analysis of a radio image
data stream with the goal to find transient sources. Contrary to previous
works, the transients we are interested in occur on a time-scale where
dispersion ... | astro-ph_IM |
The Compton-Pair telescope: A prototype for a next-generation MeV
$γ$-ray observatory: The Compton Pair (ComPair) telescope is a prototype that aims to develop the
necessary technologies for future medium energy gamma-ray missions and to
design, build, and test the prototype in a gamma-ray beam and balloon flight.
Th... | astro-ph_IM |
Effects of the Number of Active Receiver Channels on the Sensitivity of
a Reflector Antenna System with a Multi-Beam Wideband Phased Array Feed: A method for modeling a reflector antenna system with a wideband phased array
feed is presented and used to study the effects of the number of active antenna
elements and as... | astro-ph_IM |
Optical amplification for astronomical imaging at higher resolution: Heisenberg's uncertainty principle tells us that it is impossible to
determine simultaneously the position of a photon crossing a telescope's
aperture and its momentum. Super-resolution imaging techniques rely on
modification of the observed sample, o... | astro-ph_IM |
MCAO for the European Solar Telescope: first results: We analise the efficiency of wavefront reconstruction in the MultiConjugate
Adaptive Optics system for the European Solar Telescope (EST). We present
preliminary results derived from numerical simulations. We study a 4 meter
class telescope with multiple deformable ... | astro-ph_IM |
Simulation of Stray Light Contamination on CHEOPS Detector: The aim of this work is to quantify the amount of Earth stray light that
reaches the CHEOPS (CHaracterising ExOPlanets Satellite) detector. It will
carry out follow-up measurements on transiting planets. This requires exquisite
data that can be acquired only b... | astro-ph_IM |
The Gaia mission: Gaia is a cornerstone mission in the science programme of the European Space
Agency (ESA). The spacecraft construction was approved in 2006, following a
study in which the original interferometric concept was changed to a
direct-imaging approach. Both the spacecraft and the payload were built by
Europ... | astro-ph_IM |
Conditions for Coronal Observation at the Lijiang Observatory in 2011: The sky brightness is a critical parameter for estimating the coronal
observation conditions for solar observatory. As part of a site-survey project
in Western China, we measured the sky brightness continuously at the Lijiang
Observatory in Yunnan p... | astro-ph_IM |
Deep reinforcement learning for smart calibration of radio telescopes: Modern radio telescopes produce unprecedented amounts of data, which are
passed through many processing pipelines before the delivery of scientific
results. Hyperparameters of these pipelines need to be tuned by hand to produce
optimal results. Beca... | astro-ph_IM |
Optimal Filtration and a Pulsar Time Scale: An algorithm is proposed for constructing a group (ensemble) pulsar time
based on the application of optimal Wiener filters. This algorithm makes it
possible to separate the contributions of variations of the atomic time scale
and of the pulsar rotation to barycentric residua... | astro-ph_IM |
On-sky demonstration of optical polaroastrometry: A method for measuring the difference between centroids of polarized flux and
total flux of an astronomical object - {\it polaroastrometry} - is proposed.
The deviation of the centroid of flux corresponding to Stokes parameter $Q$ or
$U$ from the centroid of total flux ... | astro-ph_IM |
Correlated magnetic noise in global networks of gravitational-wave
interferometers: observations and implications: One of the most ambitious goals of gravitational-wave astronomy is to observe
the stochastic gravitational-wave background. Correlated noise in two or more
detectors can introduce a systematic error, whi... | astro-ph_IM |
High-resolution Solar Image Reconstruction Based on Non-rigid Alignment: Suppressing the interference of atmospheric turbulence and obtaining
observation data with a high spatial resolution is an issue to be solved
urgently for ground observations. One way to solve this problem is to perform a
statistical reconstructio... | astro-ph_IM |
Astro2020 Project White Paper: PolyOculus -- Low-cost Spectroscopy for
the Community: As astronomy moves into the era of large-scale time-domain surveys, we are
seeing a flood of new transient and variable sources which will reach biblical
proportions with the advent of LSST. A key strategic challenge for astronomy i... | astro-ph_IM |
Towards a cosmic-ray mass-composition study at Tunka Radio Extension
(ARENA 2016): The Tunka Radio Extension (Tunka-Rex) is a radio detector at the TAIGA
facility located in Siberia nearby the southern tip of Lake Baikal. Tunka-Rex
measures air-showers induced by high-energy cosmic rays, in particular, the
lateral di... | astro-ph_IM |
The advantages of using a Lucky Imaging camera for observations of
microlensing events: In this work, we study the advantages of using a Lucky Imaging camera for the
observations of potential planetary microlensing events. Our aim is to reduce
the blending effect and enhance exoplanet signals in binary lensing system... | astro-ph_IM |
Hunting electromagnetic counterparts of gravitational-wave events using
the Zwicky Transient Facility: Detections of coalescing binary black holes by LIGO have opened a new window
of transient astronomy. With increasing sensitivity of LIGO and participation
of the Virgo detector in Cascina, Italy, we expect to soon d... | astro-ph_IM |
Monte-Carlo Imaging for Optical Interferometry: We present a flexible code created for imaging from the bispectrum and
visibility-squared. By using a simulated annealing method, we limit the
probability of converging to local chi-squared minima as can occur when
traditional imaging methods are used on data sets with li... | astro-ph_IM |
r-Java 2.0: the astrophysics: [Context:] This article is the second in a two part series introducing r-Java
2.0, a nucleosynthesis code for open use that performs r-process calculations
and provides a suite of other analysis tools. [Aims:] The first paper discussed
the nuclear physics inherent to r-Java 2.0 and in this... | astro-ph_IM |
Radio Detection of High Energy Neutrinos in Ice: Radio-based detection of high-energy particles is growing in maturity. In
this chapter, we focus on the detection of neutrinos with energies in excess of
10 PeV that interact in the thick, radio-transparent ice found in the polar
regions. High-energy neutrinos interactin... | astro-ph_IM |
STATCONT: A statistical continuum level determination method for
line-rich sources: STATCONT is a python-based tool designed to determine the continuum emission
level in spectral data, in particular for sources with a line-rich spectrum.
The tool inspects the intensity distribution of a given spectrum and
automatical... | astro-ph_IM |
Measurement of the cosmic-ray energy spectrum above $10^{16}$ eV with
the LOFAR Radboud Air Shower Array: The energy reconstruction of extensive air showers measured with the LOFAR
Radboud Air Shower Array (LORA) is presented in detail. LORA is a particle
detector array located in the center of the LOFAR radio telesc... | astro-ph_IM |
The Faulkes Telescope Project: Not Just Pretty Pictures: The Faulkes Telescope (FT) Project is an educational and research arm of the
Las Cumbres Observatory Global Telescope Network (LCOGTN). As well as producing
spectacular images of galaxies, nebulae, supernovae remnants, star clusters,
etc., the FT team is involved... | astro-ph_IM |
Bokeh Mirror Alignment for Cherenkov Telescopes: Imaging Atmospheric Cherenkov Telescopes (IACTs) need imaging optics with
large apertures and high image intensities to map the faint Cherenkov light
emitted from cosmic ray air showers onto their image sensors. Segmented
reflectors fulfill these needs, and composed from... | astro-ph_IM |
Reconstruction methods for acoustic particle detection in the deep sea
using clusters of hydrophones: This article focuses on techniques for acoustic noise reduction, signal
filters and source reconstruction. For noise reduction, bandpass filters and
cross correlations are found to be efficient and fast ways to impro... | astro-ph_IM |
Overview of the Advanced X-ray Imaging Satellite (AXIS): The Advanced X-ray Imaging Satellite (AXIS) is a Probe-class concept that
will build on the legacy of the Chandra X-ray Observatory by providing
low-background, arcsecond-resolution imaging in the 0.3-10 keV band across a
450 arcminute$^2$ field of view, with an ... | astro-ph_IM |
Spectrally resolved imaging with the solar gravitational lens: We consider the optical properties of the solar gravitational lens (SGL)
treating the Sun as a massive compact body. Using our previously developed
wave-optical treatment of the SGL, we convolve it with a thin-lens representing
an optical telescope, and est... | astro-ph_IM |
The Maunakea Spectroscopic Explorer: Thousands of Fibers, Infinite
Possibilities: The Maunakea Spectroscopic Explorer (MSE) is a massively multiplexed
spectroscopic survey facility that will replace the Canada-France-Hawaii
Telescope over the next two decades. This 12.5-meter telescope, with its 1.5
square degree fie... | astro-ph_IM |
Effects of the Number of Active Receiver Channels on the Sensitivity of
a Reflector Antenna System with a Multi-Beam Wideband Phased Array Feed: A method for modeling a reflector antenna system with a wideband phased array
feed is presented and used to study the effects of the number of active antenna
elements and as... | astro-ph_IM |
How proper are Bayesian models in the astronomical literature?: The well-known Bayes theorem assumes that a posterior distribution is a
probability distribution. However, the posterior distribution may no longer be
a probability distribution if an improper prior distribution (non-probability
measure) such as an unbound... | astro-ph_IM |
Direct measurement of the intra-pixel response function of Kepler Space
Telescope's CCDs: Space missions designed for high precision photometric monitoring of stars
often under-sample the point-spread function, with much of the light landing
within a single pixel. Missions like MOST, Kepler, BRITE, and TESS, do this ... | astro-ph_IM |
The wavefront sensing making-of for THEMIS solar telescope: An adaptive optics system with a single deformable mirror is being
implemented on the THEMIS 90cm solar telescope. This system is designed to
operate in the visible and is required to be as robust as possible in order to
deliver the best possible correction in... | astro-ph_IM |
HCGrid: A Convolution-based Gridding Framework for RadioAstronomy in
Hybrid Computing Environments: Gridding operation, which is to map non-uniform data samples onto a uniformly
distributedgrid, is one of the key steps in radio astronomical data reduction
process. One of the mainbottlenecks of gridding is the poor co... | astro-ph_IM |
The Locus Algorithm III: A Grid Computing system to generate catalogues
of optimised pointings for Differential Photometry: This paper discusses the hardware and software components of the Grid
Computing system used to implement the Locus Algorithm to identify optimum
pointings for differential photometry of 61,662,3... | astro-ph_IM |
Effects of transients in LIGO suspensions on searches for gravitational
waves: This paper presents an analysis of the transient behavior of the Advanced
LIGO suspensions used to seismically isolate the optics. We have characterized
the transients in the longitudinal motion of the quadruple suspensions during
Advanced... | astro-ph_IM |
Investigation of the radio wavefront of air showers with LOPES
measurements and CoREAS simulations (ARENA 2014): We investigated the radio wavefront of cosmic-ray air showers with LOPES
measurements and CoREAS simulations: the wavefront is of approximately
hyperbolic shape and its steepness is sensitive to the shower... | astro-ph_IM |
Scaling of collision strengths for highly-excited states of ions of the
H- and He-like sequences: Emission lines from highly-excited states (n >= 5) of H- and He-like ions
have been detected in astrophysical sources and fusion plasmas. For such
excited states, R-matrix or distorted wave calculations for electron-impa... | astro-ph_IM |
Gaia: unraveling the chemical and dinamical history of our Galaxy: The Gaia astrometric mission - the Hipparcos successor - is described in some
detail, with its three instruments: the two (spectro)photometers (BP and RP)
covering the range 330-1050 nm, the white light (G-band) imager dedicated to
astrometry, and the r... | astro-ph_IM |
Inequalities faced by women in access to permanent positions in
astronomy in France: We investigate inequalities in access to permanent positions in professional
astronomy in France, focusing on the hiring stage. We use results from a
national survey conducted on behalf of the French society of astronomy and
astrophy... | astro-ph_IM |
New Gapless COS G140L Mode Proposed for Background-Limited Far-UV
Observations: Here we describe the observation and calibration procedure for a new G140L
observing mode for the Cosmic Origins Spectrograph (COS) aboard the Hubble
Space Telescope (HST). This mode, CENWAV = 800, is designed to move the far-UV
band full... | astro-ph_IM |
First low frequency all-sky search for continuous gravitational wave
signals: In this paper we present the results of the first low frequency all-sky
search of continuous gravitational wave signals conducted on Virgo VSR2 and
VSR4 data. The search covered the full sky, a frequency range between 20 Hz and
128 Hz with ... | astro-ph_IM |
Modeling the Optical Cherenkov Signals by Cosmic Ray Extensive Air
Showers Directly Observed from Sub-Orbital and Orbital Altitudes: Future experiments based on the observation of Earth's atmosphere from
sub-orbital and orbital altitudes plan to include optical Cherenkov cameras to
observe extensive air showers produ... | astro-ph_IM |
PRAXIS: low thermal emission high efficiency OH suppressed fibre
spectrograph: PRAXIS is a second generation instrument that follows on from GNOSIS, which
was the first instrument using fibre Bragg gratings for OH background
suppression. The Bragg gratings reflect the NIR OH lines while being
transparent to light bet... | astro-ph_IM |
A passive FPAA based RF scatter meteor detector: In the article we present a hardware meteor detector. The detection principle
is based on the electromagnetic wave reflection from the ionized meteor trail
in the atmosphere. The detector uses the ANADIGM field programmable analogue
array (FPAA), which is an attractive a... | astro-ph_IM |
μ-Spec Spectrometers for the EXCLAIM Instrument: The EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM) is a
cryogenic balloon-borne instrument that will map carbon monoxide and
singly-ionized carbon emission lines across redshifts from 0 to 3.5, using an
intensity mapping approach. EXCLAIM will broade... | astro-ph_IM |
Data model as agile basis for evolving calibration software: We design the imaging data calibration and reduction software for MICADO, the
First Light near-IR instrument on the Extremely Large Telescope. In this
process we have hit the limit of what can be achieved with a detailed software
design that is primarily capt... | astro-ph_IM |
Photometric Redshift Biases from Galaxy Evolution: Proposed cosmological surveys will make use of photometric redshifts of
galaxies that are significantly fainter than any complete spectroscopic
redshift surveys that exist to train the photo-z methods. We investigate the
photo-z biases that result from known difference... | astro-ph_IM |
New Generation Stellar Spectral Libraries in the Optical and
Near-Infrared I: The Recalibrated UVES-POP Library for Stellar Population
Synthesis: We present re-processed flux calibrated spectra of 406 stars from the
UVES-POP stellar library in the wavelength range 320-1025 nm, which can be used
for stellar populati... | astro-ph_IM |
Prediction of Apophis Asteroid Flyby Optimal Trajectories and Data
Fusion of Earth-Apophis Mission Launch Windows using Deep Neural Networks: In recent years, understanding asteroids has shifted from light worlds to
geological worlds by exploring modern spacecraft and advanced radar and
telescopic surveys. However, f... | astro-ph_IM |
Dawes Review 5: Australian Aboriginal Astronomy and Navigation: The traditional cultures of Aboriginal Australians include a significant
astronomical component, perpetuated through oral tradition, ceremony, and art.
This astronomical knowledge includes a deep understanding of the motion of
objects in the sky, which was... | astro-ph_IM |
Performances of an upgraded front-end-board for the NectarCAM camera: The Front-End Board (FEB) is a key component of the NectarCAM camera, which
has been developed for the Medium-Sized-Telescopes (MST) of the Cherenkov
Telescope Array Observatory (CTAO). The FEB is responsible for reading and
converting the signals fr... | astro-ph_IM |
Realizing the potential of astrostatistics and astroinformatics: This Astro2020 State of the Profession Consideration White Paper highlights
the growth of astrostatistics and astroinformatics in astronomy, identifies key
issues hampering the maturation of these new subfields, and makes
recommendations for structural im... | astro-ph_IM |
Extension of the Bayesian searches for anisotropic stochastic
gravitational-wave background with non-tensorial polarizations: The recent announcement of strong evidence for a stochastic
gravitational-wave background (SGWB) by various pulsar timing array
collaborations has highlighted this signal as a promising candid... | astro-ph_IM |
Photoprocessing of formamide ice: route towards prebiotic chemistry in
space: Aims. Formamide (HCONH2) is the simplest molecule containing the peptide bond
first detected in the gas phase in Orion-KL and SgrB2. In recent years, it has
been observed in high temperature regions such as hot corinos, where thermal
desorp... | astro-ph_IM |
Geometric calibration of Colour and Stereo Surface Imaging System of
ESA's Trace Gas Orbiter: There are many geometric calibration methods for "standard" cameras. These
methods, however, cannot be used for the calibration of telescopes with large
focal lengths and complex off-axis optics. Moreover, specialized calibr... | astro-ph_IM |
T35: a small automatic telescope for long-term observing campaigns: The T35 is a small telescope (14") equipped with a large format CCD camera
installed in the Sierra Nevada Observatory (SNO) in Southern Spain. This
telescope will be a useful tool for the detecting and studying pulsating stars,
particularly, in open cl... | astro-ph_IM |
Advanced Environmentally Resistant Lithium Fluoride Mirror Coatings for
the Next-Generation of Broadband Space Observatories: Recent advances in the physical vapor deposition (PVD) of protective fluoride
films have raised the far-ultraviolet (FUV: 912-1600 {\AA}) reflectivity of
aluminum-based mirrors closer to the t... | astro-ph_IM |
AstroSat - a multi-wavelength astronomy satellite: AstroSat is a multi-wavelength astronomy satellite, launched on 2015
September 28. It carries a suite of scientific instruments for multi-wavelength
observations of astronomical sources. It is a major Indian effort in space
astronomy and the context of AstroSat is exam... | astro-ph_IM |
The Zadko Telescope: A Southern Hemisphere Telescope for Optical
Transient Searches, Multi-Messenger Astronomy and Education: The new 1-m f/4 fast-slew Zadko Telescope was installed in June 2008 about 70
km north of Perth, Western Australia. It is the only metre-class optical
facility at this southern latitude betwee... | astro-ph_IM |
Comparative performance of some popular ANN algorithms on benchmark and
function approximation problems: We report an inter-comparison of some popular algorithms within the
artificial neural network domain (viz., Local search algorithms, global search
algorithms, higher order algorithms and the hybrid algorithms) by ... | astro-ph_IM |
Ultra-fast model emulation with PRISM; analyzing the Meraxes galaxy
formation model: We demonstrate the potential of an emulator-based approach to analyzing
galaxy formation models in the domain where constraining data is limited. We
have applied the open-source Python package PRISM to the galaxy formation model
Mera... | astro-ph_IM |
Application of a Regional Model to Astronomical Site Testing in Western
Antarctica: The quality of ground based astronomical observations are significantly
affected by telluric conditions, and the search for best sites has led to the
construction of observatories at remote locations, including recent initiatives
on t... | astro-ph_IM |
AMIDAS-II: Upgrade of the AMIDAS Package and Website for Direct Dark
Matter Detection Experiments and Phenomenology: In this paper, we give a detailed user's guide to the AMIDAS (A
Model-Independent Data Analysis System) package and website, which is developed
for online simulations and data analyses for direct Dark ... | astro-ph_IM |
Monte-Carlo Imaging for Optical Interferometry: We present a flexible code created for imaging from the bispectrum and
visibility-squared. By using a simulated annealing method, we limit the
probability of converging to local chi-squared minima as can occur when
traditional imaging methods are used on data sets with li... | astro-ph_IM |
Long-term stability of fibre-optic transmission for multi-object
spectroscopy: We present an analysis of the long-term stability of fibre-optic transmission
properties for fibre optics in astronomy. Data from six years of operation of
the AAOmega multi-object spectrograph at the Anglo-Australian Telescope is
presente... | astro-ph_IM |
Observation of axisymmetric standard magnetorotational instability in
the laboratory: We report the first direct evidence for the axisymmetric standard
magnetorotational instability (SMRI) from a combined experimental and numerical
study of a magnetized liquid-metal shear flow in a Taylor-Couette cell with
independen... | astro-ph_IM |
Investigating the Efficiency of the Beijing Faint Object Spectrograph
and Camera (BFOSC) of the Xinglong 2.16-m Reflector: The Beijing Faint Object Spectrograph and Camera (BFOSC) is one of the most
important instruments of the 2.16-m telescope of the Xinglong Observatory.
Every year there are ~ 20 SCI-papers publish... | astro-ph_IM |
Apertif, Phased Array Feeds for the Westerbork Synthesis Radio Telescope: We describe the APERture Tile In Focus (Apertif) system, a phased array feed
(PAF) upgrade of the Westerbork Synthesis Radio Telescope which has transformed
this telescope into a high-sensitivity, wide field-of-view L-band imaging and
transient s... | astro-ph_IM |
Understanding Instrumental Stokes Leakage in Murchison Widefield Array
Polarimetry: This paper offers an electromagnetic, more specifically array theory,
perspective on understanding strong instrumental polarization effects for
planar low-frequency "aperture arrays" with the Murchison Widefield Array (MWA)
as an exam... | astro-ph_IM |
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