text stringlengths 89 2.49k | category stringclasses 19
values |
|---|---|
On the reconstruction of motion of a binary star moving in the external
gravitational field of Kerr black hole by its redshift: We present a research of the time evolution of the redshift of light received
from the binary star that moves in the external gravitational field of Kerr
black hole. We formulate a method fo... | astro-ph_IM |
Towards an overall astrometric error budget with MICADO-MCAO: MICADO is the Multi-AO Imaging Camera for Deep Observations, and it will be
one of the first light instruments of the Extremely Large Telescope (ELT).
Doing high precision multi-object differential astrometry behind ELT is
particularly effective given the in... | astro-ph_IM |
In-flight performance and calibration of the Grating Wheel Assembly
sensors (NIRSpec/JWST): The Near-Infrared Spectrograph (NIRSpec) on board of the James Webb Space
Telescope will be the first multi-object spectrograph in space offering
~250,000 configurable micro-shutters, apart from being equipped with an
integral... | astro-ph_IM |
Nanosatellite aerobrake maneuvering device: In this paper, we present the project of the heliogyro solar sail unit for
deployment of CubeSat constellation and satellite deorbiting. The ballistic
calculations show that constellation deployment period can vary from 0.18 years
for 450km initial orbit and 2 CubeSats up to ... | astro-ph_IM |
Radio interferometric imaging of spatial structure that varies with time
and frequency: The spatial-frequency coverage of a radio interferometer is increased by
combining samples acquired at different times and observing frequencies.
However, astrophysical sources often contain complicated spatial structure that
vari... | astro-ph_IM |
Fundamentals of impulsive energy release in the corona: It is essential that there be coordinated and co-optimized observations in
X-rays, gamma-rays, and EUV during the peak of solar cycle 26 (~2036) to
significantly advance our understanding of impulsive energy release in the
corona. The open questions include: What ... | astro-ph_IM |
The outreach activities in the astronomical research institutions and
the role of librarians: what happens in Italy: The outreach activities can be considered a new frontier of all the main
astronomical research institutions worldwide and are a part of their mission
that earns great appreciation from the general publ... | astro-ph_IM |
The image slicer for the Subaru Telescope High Dispersion Spectrograph: We report on the design, manufacturing, and performance of the image slicer
for the High Dispersion Spectrograph (HDS) on the Subaru Telescope. This
instrument is a Bowen-Walraven type image slicer providing five 0.3 arcsec x
1.5 arcsec images with... | astro-ph_IM |
The Power of Simultaneous Multi-frequency Observations for mm-VLBI:
Beyond Frequency Phase Transfer: Atmospheric propagation effects at millimeter wavelengths can significantly
alter the phases of radio signals and reduce the coherence time, putting tight
constraints on high frequency Very Long Baseline Interferometr... | astro-ph_IM |
Enhancing Science from Future Space Missions and Planetary Radar with
the SKA: Both Phase 1 of the Square Kilometre Array (SKA1) and the full SKA have the
potential to dramatically increase the science return from future astrophysics,
heliophysics, and especially planetary missions, primarily due to the greater
sensi... | astro-ph_IM |
Small Telescope Exoplanet Transit Surveys: XO: The XO project aims at detecting transiting exoplanets around bright stars
from the ground using small telescopes. The original configuration of XO
(McCullough et al. 2005) has been changed and extended as described here. The
instrumental setup consists of three identical ... | astro-ph_IM |
Fireball streak detection with minimal CPU processing requirements for
the Desert Fireball Network data processing pipeline: The detection of fireballs streaks in astronomical imagery can be carried out
by a variety of methods. The Desert Fireball Network--DFN--uses a network of
cameras to track and triangulate incom... | astro-ph_IM |
On the Angular Resolution of Pair-Conversion $γ$-Ray Telescopes: I present a study of the several contributions to the single-photon angular
resolution of pair telescopes in the MeV energy range. I examine some test
cases, the presently active {\sl Fermi} LAT, the ``pure-silicon'' projects
ASTROGAM and AMEGO-X, and the... | astro-ph_IM |
Search for Ultra-High Energy Photons with the Pierre Auger Observatory: One of key scientific objectives of the Pierre Auger Observatory is the
search for ultra-high energy photons. Such photons could originate either in
the interactions of energetic cosmic-ray nuclei with the cosmic microwave
background (so-called cos... | astro-ph_IM |
Comparison of Different Trigger and Readout Approaches for Cameras in
the Cherenkov Telescope Array Project: The Cherenkov Telescope Array (CTA) is a next-generation ground-based
observatory for g -rays with energies between some ten GeV and a few hundred
TeV. CTA is currently in the advanced design phase and will co... | astro-ph_IM |
Spectrum Sharing Dynamic Protection Area Neighborhoods for Radio
Astronomy: To enforce incumbent protection through a spectrum access system (SAS) or
future centralized shared spectrum system, dynamic protection area (DPA)
neighborhood distances are employed. These distances are distance radii, in
which citizen broad... | astro-ph_IM |
ORIGIN: Blind detection of faint emission line galaxies in MUSE
datacubes: One of the major science cases of the MUSE integral field spectrograph is the
detection of Lyman-alpha emitters at high redshifts. The on-going and planned
deep fields observations will allow for one large sample of these sources. An
efficient... | astro-ph_IM |
Historic evolution of the optical design of the Multi Conjugate Adaptive
Optics Relay for the Extremely Large Telescope: The optical design of the Multi Conjugate Adaptive Optics Relay for the
Extremely Large Telescope experienced many modifications since Phase A
conclusion in late 2009. These modifications were due ... | astro-ph_IM |
Precise measurement of the absolute fluorescence yield of the 337 nm
band in atmospheric gases: A measurement of the absolute fluorescence yield of the 337 nm nitrogen band,
relevant to ultra-high energy cosmic ray (UHECR) detectors, is reported. Two
independent calibrations of the fluorescence emission induced by a ... | astro-ph_IM |
Inference of Unresolved Point Sources At High Galactic Latitudes Using
Probabilistic Catalogs: Detection of point sources in images is a fundamental operation in
astrophysics, and is crucial for constraining population models of the
underlying point sources or characterizing the background emission. Standard
techniqu... | astro-ph_IM |
An FFT-based Solution Method for the Poisson Equation on 3D Spherical
Polar Grids: The solution of the Poisson equation is a ubiquitous problem in computational
astrophysics. Most notably, the treatment of self-gravitating flows involves
the Poisson equation for the gravitational field. In hydrodynamics codes using
s... | astro-ph_IM |
Radio interferometric gain calibration as a complex optimization problem: Recent developments in optimization theory have extended some traditional
algorithms for least-squares optimization of real-valued functions
(Gauss-Newton, Levenberg-Marquardt, etc.) into the domain of complex functions
of a complex variable. Thi... | astro-ph_IM |
Near-IR and visual high resolution polarimetric imaging with AO systems: Many spectacular polarimetric images have been obtained in recent years with
adaptive optics (AO) instruments at large telescopes because they profit
significantly from the high spatial resolution. This paper summarizes some
basic principles for A... | astro-ph_IM |
Analysis of the Bayesian Cramer-Rao lower bound in astrometry: Studying
the impact of prior information in the location of an object: Context. The best precision that can be achieved to estimate the location of
a stellar-like object is a topic of permanent interest in the astrometric
community.
Aims. We analyse bou... | astro-ph_IM |
Development of HPD Clusters for MAGIC-II: MAGIC-II is the second imaging atmospheric Cherenkov telescope of the MAGIC
observatory, which has recently been inaugurated on Canary island of La Palma.
We are currently developing a new camera based on clusters of hybrid photon
detectors (HPD) for the upgrade of MAGIC-II. Th... | astro-ph_IM |
The RoboPol sample of optical polarimetric standards: Optical polarimeters are typically calibrated using measurements of stars
with known and stable polarization parameters. However, there is a lack of such
stars available across the sky. Many of the currently available standards are
not suitable for medium and large ... | astro-ph_IM |
The infrared imaging spectrograph (IRIS) for TMT: electronics-cable
architecture: The InfraRed Imaging Spectrograph (IRIS) is a first-light instrument for the
Thirty Meter Telescope (TMT). It combines a diffraction limited imager and an
integral field spectrograph. This paper focuses on the electrical system of
IRIS.... | astro-ph_IM |
Spectropolarimeter on-board the Aditya-L1: Polarization Modulation and
Demodulation: One of the major science goals of the Visible Emission Line Coronagraph
(VELC) payload aboard the Aditya-L1 mission is to map the coronal magnetic
field topology and the quantitative estimation of longitudinal magnetic field
on routi... | astro-ph_IM |
Galaxy And Mass Assembly (GAMA): autoz spectral redshift measurements,
confidence and errors: The Galaxy And Mass Assembly (GAMA) survey has obtained spectra of over
230000 targets using the Anglo-Australian Telescope. To homogenise the redshift
measurements and improve the reliability, a fully automatic redshift cod... | astro-ph_IM |
A new sky subtraction technique for low surface brightness data: We present a new approach to the sky subtraction for long-slit spectra
suitable for low-surface brightness objects based on the controlled
reconstruction of the night sky spectrum in the Fourier space using twilight or
arc-line frames as references. It ca... | astro-ph_IM |
Cosmic Ray in the Northern Hemisphere: Results from the Telescope Array
Experiment: The Telescope Array (TA) is the largest ultrahigh energy (UHE) cosmic ray
observatory in the northern hemisphere TA is a hybrid experiment with a unique
combination of fluorescence detectors and a stand-alone surface array of
scintill... | astro-ph_IM |
Speckle correction in polychromatic light with the self-coherent camera
for the direct detection of exoplanets: Direct detection is a very promising field in exoplanet science. It allows
the detection of companions with large separation and allows their spectral
analysis. A few planets have already been detected and ... | astro-ph_IM |
MeerKATHI -- an end-to-end data reduction pipeline for MeerKAT and other
radio telescopes: MeerKATHI is the current development name for a radio-interferometric data
reduction pipeline, assembled by an international collaboration. We create a
publicly available end-to-end continuum- and line imaging pipeline for Meer... | astro-ph_IM |
On the efficiency of techniques for the reduction of impulsive noise in
astronomical images: The impulsive noise in astronomical images originates from various sources.
It develops as a result of thermal generation in pixels, collision of cosmic
rays with image sensor or may be induced by high readout voltage in Elec... | astro-ph_IM |
The Qatar Exoplanet Survey: The Qatar Exoplanet Survey (QES) is discovering hot Jupiters and aims to
discover hot Saturns and hot Neptunes that transit in front of relatively
bright host stars. QES currently operates a robotic wide-angle camera system to
identify promising transiting exoplanet candidates among which ar... | astro-ph_IM |
Your data is your dogfood: DevOps in the astronomical observatory: DevOps is the contemporary term for a software development culture that
purposefully blurs distinction between software development and IT operations
by treating "infrastructure as code." DevOps teams typically implement
practices summarised by the coll... | astro-ph_IM |
An Automated Pipeline for the VST Data Log Analysis: The VST Telescope Control Software logs continuously detailed information
about the telescope and instrument operations. Commands, telemetries, errors,
weather conditions and anything may be relevant for the instrument maintenance
and the identification of problem so... | astro-ph_IM |
Serendipitous Science from the K2 Mission: The K2 mission is a repurposed use of the Kepler spacecraft to perform
high-precision photometry of selected fields in the ecliptic. We have developed
an aperture photometry pipeline for K2 data which performs dynamic automated
aperture mask selection, background estimation an... | astro-ph_IM |
Cosmic Microwave Background Mapmaking with a Messenger Field: We apply a messenger field method to solve the linear minimum-variance
mapmaking equation in the context of Cosmic Microwave Background (CMB)
observations. In simulations, the method produces sky maps that converge
significantly faster than those from a conj... | astro-ph_IM |
KLLR: A scale-dependent, multivariate model class for regression
analysis: The underlying physics of astronomical systems governs the relation between
their measurable properties. Consequently, quantifying the statistical
relationships between system-level observable properties of a population offers
insights into th... | astro-ph_IM |
Deep sub-arcsecond widefield imaging of the Lockman Hole field at 144
MHz: High quality low-frequency radio surveys have the promise of advancing our
understanding of many important topics in astrophysics, including the life
cycle of active galactic nuclei (AGN), particle acceleration processes in jets,
the history o... | astro-ph_IM |
Multi-messenger Astronomy: a Bayesian approach: After the discovery of the gravitational waves and the observation of
neutrinos of cosmic origin, we have entered a new and exciting era where cosmic
rays, neutrinos, photons and gravitational waves will be used simultaneously to
study the highest energy phenomena in the ... | astro-ph_IM |
MOSAIX: a tool to built large mosaics from GALEX images: Large sky surveys are providing a huge amount of information for studies of
the interstellar medium, the galactic structure or the cosmic web. Setting into
a common frame information coming from different wavelengths, over large fields
of view, is needed for this... | astro-ph_IM |
The Experiment for Cryogenic Large-aperture Intensity Mapping (EXCLAIM): The EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM) is a
cryogenic balloon-borne instrument that will survey galaxy and star formation
history over cosmological time scales. Rather than identifying individual
objects, EXCLAIM w... | astro-ph_IM |
UNI Astronomical Observatory - OAUNI: First light: We show the actual status of the project to implement the Astronomical
Observatory of the National University of Engineering (OAUNI), including its
first light. The OAUNI was installed with success at the site of the Huancayo
Observatory on the peruvian central Andes. ... | astro-ph_IM |
Real-time exposure control and instrument operation with the NEID
spectrograph GUI: The NEID spectrograph on the WIYN 3.5-m telescope at Kitt Peak has completed
its first full year of science operations and is reliably delivering sub-m/s
precision radial velocity measurements. The NEID instrument control system uses
... | astro-ph_IM |
Transforming the Canada France Hawaii Telescope (CFHT) into the Maunakea
Spectroscopic Explorer (MSE): A Conceptual Observatory Building and
Facilities Design: The Canada France Hawaii Telescope Corporation (CFHT) plans to repurpose its
observatory on the summit of Maunakea and operate a new wide field
spectroscopi... | astro-ph_IM |
21 cm Intensity Mapping: Using the 21 cm line, observed all-sky and across the redshift range from 0
to 5, the large scale structure of the Universe can be mapped in three
dimensions. This can be accomplished by studying specific intensity with
resolution ~ 10 Mpc, rather than via the usual galaxy redshift survey. The ... | astro-ph_IM |
Flowdown of the TMT astrometry error budget(s) to the IRIS design: TMT has defined the accuracy to be achieved for both absolute and
differential astrometry in its top-level requirements documents. Because of the
complexities of different types of astrometric observations, these requirements
cannot be used to specify s... | astro-ph_IM |
A Study of the Compact Water Vapor Radiometer for Phase Calibration of
the Karl G. Janksy Very Large Array: We report on laboratory test results of the Compact Water Vapor Radiometer
(CWVR) prototype for the NSF's Karl G. Jansky Very Large Array (VLA), a
five-channel design centered around the 22 GHz water vapor line... | astro-ph_IM |
Spatial intensity interferometry on three bright stars: The present articlereports on the first spatial intensity interferometry
measurements on stars since the observations at Narrabri Observatory by Hanbury
Brown et al. in the 1970's. Taking advantage of the progresses in recent years
on photon-counting detectors and... | astro-ph_IM |
Optimisation of a Hydrodynamic SPH-FEM Model for a Bioinspired
Aerial-aquatic Spacecraft on Titan: Titan, Saturn's largest moon, supports a dense atmosphere, numerous bodies of
liquid on its surface, and as a richly organic world is a primary focus for
understanding the processes that support the development of life.... | astro-ph_IM |
The Low Earth Orbit Satellite Population and Impacts of the SpaceX
Starlink Constellation: I discuss the current low Earth orbit artificial satellite population and
show that the proposed `megaconstellation' of circa 12,000 Starlink internet
satellites would dominate the lower part of Earth orbit, below 600 km, with ... | astro-ph_IM |
Initial follow-up of optical transients with COLORES using the BOOTES
network: The Burst Observer and Optical Transient Exploring System (BOOTES) is a
network of telescopes that allows the continuous monitoring of transient
astrophysical sources. It was originally devoted to the study of the optical
emission from gam... | astro-ph_IM |
Short Spacing Considerations for the ngVLA: The next generation Very Large Array project (ngVLA) would represent a major
step forward in sensitivity and resolution for radio astronomy, with ability to
achieve 2 milli-arcsec resolution at 100 GHz (assuming a maximum baseline of
300 km). For science on spatial scales of ... | astro-ph_IM |
ESA Voyage 2050 white paper -- Faint objects in motion: the new frontier
of high precision astrometry: Sky survey telescopes and powerful targeted telescopes play complementary
roles in astronomy. In order to investigate the nature and characteristics of
the motions of very faint objects, a flexibly-pointed instrumen... | astro-ph_IM |
Cadmium Zinc Telluride Imager onboard AstroSat : a multi-faceted hard
X-ray instrument: The AstroSat satellite is designed to make multi-waveband observations of
astronomical sources and the Cadmium Zinc Telluride Imager (CZTI) instrument of
AstroSat covers the hard X-ray band. CZTI has a large area position sensitiv... | astro-ph_IM |
Solving Kepler's equation with CORDIC double iterations: In a previous work, we developed the idea to solve Kepler's equation with a
CORDIC-like algorithm, which does not require any division, but still
multiplications in each iteration. Here we overcome this major shortcoming and
solve Kepler's equation using only bit... | astro-ph_IM |
Theia: Faint objects in motion or the new astrometry frontier: In the context of the ESA M5 (medium mission) call we proposed a new
satellite mission, Theia, based on relative astrometry and extreme precision to
study the motion of very faint objects in the Universe. Theia is primarily
designed to study the local dark ... | astro-ph_IM |
Speckle Space-Time Covariance in High-Contrast Imaging: We introduce a new framework for point-spread function (PSF) subtraction
based on the spatio-temporal variation of speckle noise in high-contrast
imaging data where the sampling timescale is faster than the speckle evolution
timescale. One way that space-time cova... | astro-ph_IM |
The Cherenkov Telescope Array On-Site integral sensitivity: observing
the Crab: The Cherenkov Telescope Array (CTA) is the future large observatory in the
very high energy (VHE) domain. Operating from 20 GeV to 300 TeV, it will be
composed of tens of Imaging Air Cherenkov Telescopes (IACTs) displaced in a
large area ... | astro-ph_IM |
Super-resolution Full Polarimetric Imaging for Radio Interferometry with
Sparse Modeling: We propose a new technique for radio interferometry to obtain
super-resolution full polarization images in all four Stokes parameters using
sparse modeling. The proposed technique reconstructs the image in each Stokes
parameter ... | astro-ph_IM |
The Tianlai project: a 21cm cosmology experiment: In my talk at the 2nd Galileo-Xu Meeting, I presented several different
topics in 21cm cosmology for which I have done research. These includes the
21cm signature of the first stars[1,2], the 21cm signal from the IGM and
minihalos[3], effect of dark matter annihila- tio... | astro-ph_IM |
What Does a Successful Postdoctoral Fellowship Publication Record Look
Like?: Obtaining a prize postdoctoral fellowship in astronomy and astrophysics
involves a number of factors, many of which cannot be quantified. One criterion
that can be measured is the publication record of an applicant. The publication
records ... | astro-ph_IM |
Event reconstruction with the proposed large area Cherenkov air shower
detector SCORE: The proposed SCORE detector consists of a large array of light collecting
modules designed to sample the Cherenkov light front of extensive air showers
in order to detect high energy gamma-rays. A large spacing of the detector
stat... | astro-ph_IM |
Design and performance of the Spider instrument: Here we describe the design and performance of the Spider instrument. Spider
is a balloon-borne cosmic microwave background polarization imager that will
map part of the sky at 90, 145, and 280 GHz with sub-degree resolution and high
sensitivity. This paper discusses the... | astro-ph_IM |
Entering into the Wide Field Adaptive Optics Era on Maunakea: As part of the National Science Foundation funded "Gemini in the Era of
MultiMessenger Astronomy" (GEMMA) program, Gemini Observatory is developing
GNAO, a widefield adaptive optics (AO) facility for Gemini-North on Maunakea,
the only 8m-class open-access te... | astro-ph_IM |
Nanosatellite aerobrake maneuvering device: In this paper, we present the project of the heliogyro solar sail unit for
deployment of CubeSat constellation and satellite deorbiting. The ballistic
calculations show that constellation deployment period can vary from 0.18 years
for 450km initial orbit and 2 CubeSats up to ... | astro-ph_IM |
A multi-method approach to radial-velocity measurement for single-object
spectra: The derivation of radial velocities from large numbers of spectra that
typically result from survey work, requires automation. However, except for the
classical cases of slowly rotating late-type spectra, existing methods of
measuring D... | astro-ph_IM |
First results about on-ground calibration of the Silicon Tracker for the
AGILE satellite: The AGILE scientific instrument has been calibrated with a tagged
$\gamma$-ray beam at the Beam Test Facility (BTF) of the INFN Laboratori
Nazionali di Frascati (LNF). The goal of the calibration was the measure of the
Point Spr... | astro-ph_IM |
In-flight performance of the DAMPE silicon tracker: DAMPE (DArk Matter Particle Explorer) is a spaceborne high-energy cosmic ray
and gamma-ray detector, successfully launched in December 2015. It is designed
to probe astroparticle physics in the broad energy range from few GeV to 100
TeV. The scientific goals of DAMPE ... | astro-ph_IM |
New Dark Matter Detector using Nanoscale Explosives: We present nanoscale explosives as a novel type of dark matter detector and
study the ignition properties. When a Weakly Interacting Massive Particle WIMP
from the Galactic Halo elastically scatters off of a nucleus in the detector,
the small amount of energy deposit... | astro-ph_IM |
Cosmic Inference: Constraining Parameters With Observations and Highly
Limited Number of Simulations: Cosmological probes pose an inverse problem where the measurement result is
obtained through observations, and the objective is to infer values of model
parameters which characterize the underlying physical system --... | astro-ph_IM |
aTmcam: A Simple Atmospheric Transmission Monitoring Camera For Sub 1%
Photometric Precision: Traditional color and airmass corrections can typically achieve ~0.02 mag
precision in photometric observing conditions. A major limiting factor is the
variability in atmospheric throughput, which changes on timescales of le... | astro-ph_IM |
Two-index model for characterizing site-specific night sky brightness
patterns: Determining the all-sky radiance distribution produced by artificial light
sources is a computationally demanding task that generally requires an
intensive calculation load. We develop in this work an analytic formulation
that provides th... | astro-ph_IM |
Per aspera ad astra simul: Through difficulties to the stars together: In this article, we detail the strategic partnerships "Per Aspera Ad Astra
Simul" and "European Collaborating Astronomers Project:
Espa\~na-Czechia-Slovakia". These strategic partnerships were conceived to
foment international collaboration for educ... | astro-ph_IM |
From Photometric Redshifts to Improved Weather Forecasts: machine
learning and proper scoring rules as a basis for interdisciplinary work: The amount, size, and complexity of astronomical data-sets and databases are
growing rapidly in the last decades, due to new technologies and dedicated
survey telescopes. Besides ... | astro-ph_IM |
Revisiting the Solar Research Cyberinfrastructure Needs: A White Paper
of Findings and Recommendations: Solar and Heliosphere physics are areas of remarkable data-driven
discoveries. Recent advances in high-cadence, high-resolution multiwavelength
observations, growing amounts of data from realistic modeling, and ope... | astro-ph_IM |
Measurement of the atmospheric primary aberrations by 4-aperture DIMM: The present paper investigates and discusses the ability of the Hartmann test
with 4-aperture DIMM to measure the atmospheric primary aberrations which, in
turn, can be used for calculation of the atmospheric coherence time. Through
performing numer... | astro-ph_IM |
A Hybrid Algorithm of Fast Invariant Imbedding and Doubling-Adding
Methods for Efficient Multiple Scattering Calculations: An efficient hybrid numerical method for multiple scattering calculations is
proposed. We use the well established doubling--adding method to find the
reflection function of the lowermost homogen... | astro-ph_IM |
GALAXY package for N-body simulation: This posting announces public availability of the GALAXY software package
developed by the author over the past 40 years. It is a highly efficient code
for the evolution of (almost) isolated, collisionless stellar systems, both
disk-like and ellipsoidal. In addition to the N-body c... | astro-ph_IM |
Impact of infrasound atmospheric noise on gravity detectors used for
astrophysical and geophysical applications: Density changes in the atmosphere produce a fluctuating gravity field that
affect gravity strainmeters or gravity gradiometers used for the detection of
gravitational-waves and for geophysical applications... | astro-ph_IM |
Camera Calibration of the CTA-LST prototype: The Cherenkov Telescope Array (CTA) is the next-generation gamma-ray
observatory that is expected to reach one order of magnitude better sensitivity
than that of current telescope arrays. The Large-Sized Telescopes (LSTs) have
an essential role in extending the energy range ... | astro-ph_IM |
Cryogenic characterization of the Planck sorption cooler system flight
model: This paper is part of the Prelaunch status LFI papers published on JINST:
http://www.iop.org/EJ/journal/-page=extra.proc5/1748-0221
Two continuous closed-cycle hydrogen Joule-Thomson (J-T) sorption coolers
have been fabricated and assembl... | astro-ph_IM |
Real-Time Analysis sensitivity evaluation of the Cherenkov Telescope
Array: The Cherenkov Telescope Array (CTA), the new generation very high-energy
gamma-ray observatory, will improve the flux sensitivity of the current
Cherenkov telescopes by an order of magnitude over a continuous range from
about 10 GeV to above ... | astro-ph_IM |
Performance of the ARIANNA Hexagonal Radio Array: Installation of the ARIANNA Hexagonal Radio Array (HRA) on the Ross Ice Shelf
of Antarctica has been completed. This detector serves as a pilot program to
the ARIANNA neutrino telescope, which aims to measure the diffuse flux of very
high energy neutrinos by observing t... | astro-ph_IM |
Consistent SPH Simulations of Protostellar Collapse and Fragmentation: We study the consistency and convergence of smoothed particle hydrodynamics
(SPH), as a function of the interpolation parameters, namely the number of
particles $N$, the number of neighbors $n$, and the smoothing length $h$, using
simulations of the... | astro-ph_IM |
SPECULOOS exoplanet search and its prototype on TRAPPIST: One of the most significant goals of modern science is establishing whether
life exists around other suns. The most direct path towards its achievement is
the detection and atmospheric characterization of terrestrial exoplanets with
potentially habitable surface... | astro-ph_IM |
An Electron-Tracking Compton Telescope for a Survey of the Deep Universe
by MeV gamma-rays: Photon imaging for MeV gammas has serious difficulties due to huge
backgrounds and unclearness in images, which are originated from incompleteness
in determining the physical parameters of Compton scattering in detection,
e.g.... | astro-ph_IM |
Optimized Large-Scale CMB Likelihood And Quadratic Maximum Likelihood
Power Spectrum Estimation: We revisit the problem of exact CMB likelihood and power spectrum estimation
with the goal of minimizing computational cost through linear compression. This
idea was originally proposed for CMB purposes by Tegmark et al.\... | astro-ph_IM |
India's first robotic eye for time domain astrophysics: the GROWTH-India
telescope: We present the design and performance of the GROWTH-India telescope, a 0.7 m
robotic telescope dedicated to time-domain astronomy. The telescope is equipped
with a 4k back-illuminated camera giving a 0.82-degree field of view and
sens... | astro-ph_IM |
Three editions of the Star Catalogue of Tycho Brahe: Tycho Brahe completed his catalogue with the positions and magnitudes of 1004
fixed stars in 1598. This catalogue circulated in manuscript form. Brahe edited
a shorter version with 777 stars, printed in 1602, and Kepler edited the full
catalogue of 1004 stars, printe... | astro-ph_IM |
Overview of the SAPHIRA Detector for AO Applications: We discuss some of the unique details of the operation and behavior of
Leonardo SAPHIRA detectors, particularly in relation to their usage for
adaptive optics wavefront sensing. SAPHIRA detectors are 320$\times$256@24
$\mu$m pixel HgCdTe linear avalanche photodiode ... | astro-ph_IM |
A semi-supervised Machine Learning search for never-seen
Gravitational-Wave sources: By now, tens of gravitational-wave (GW) events have been detected by the LIGO
and Virgo detectors. These GWs have all been emitted by compact binary
coalescence, for which we have excellent predictive models. However, there
might be ... | astro-ph_IM |
A Site Evaluation Campaign for a Ground Based Atmospheric Cherenkov
Telescope in Romania: Around the world, several scientific projects share the interest of a global
network of small Cherenkov telescopes for monitoring observations of the
brightest blazars - the DWARF network. A small, ground based, imaging
atmosphe... | astro-ph_IM |
The Future of Astronomical Data Infrastructure: Meeting Report: The astronomical community is grappling with the increasing volume and
complexity of data produced by modern telescopes, due to difficulties in
reducing, accessing, analyzing, and combining archives of data. To address this
challenge, we propose the establ... | astro-ph_IM |
Bayesian jackknife tests with a small number of subsets: Application to
HERA 21cm power spectrum upper limits: We present a Bayesian jackknife test for assessing the probability that a
data set contains biased subsets, and, if so, which of the subsets are likely
to be biased. The test can be used to assess the presen... | astro-ph_IM |
The Astro-WISE Optical Image Pipeline: Development and Implementation: We have designed and implemented a novel way to process wide-field
astronomical data within a distributed environment of hardware resources and
humanpower. The system is characterized by integration of archiving,
calibration, and post-calibration an... | astro-ph_IM |
3C84, BL Lac. Earth based VLBI test for the RADIOASTRON project: Results of processing of data of a VLBI experiment titled RAPL01 are
presented. These VLBI observations were made on 4th February, 2010 at 6.28 cm
between the 100-m antenna of the Max Planck Institute (Effelsberg, Germany),
Puschino 22-m antenna (Astro Sp... | astro-ph_IM |
IVOA Recommendation: Space-Time Coordinate Metadata for the Virtual
Observatory Version 1.33: This document provides a complete design description of the Space-Time
Coordinate (STC) metadata for the Virtual Observatory. It explains the various
components, highlights some implementation considerations, presents a comp... | astro-ph_IM |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.