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Novel Back-coated Glass Mirrors for the MAGIC Telescopes: The mirrors installed on Imaging Atmospheric Cherenkov Telescopes like the
MAGIC telescopes in La Palma, Canary Islands, are constantly exposed to the
harsh environment. They have to withstand wind-induced corrosion from dust and
sand, changing temperatures, and... | astro-ph_IM |
Segment-level thermal sensitivity analysis for exo-Earth imaging: We present a segment-level wavefront stability error budget for space
telescopes essential for exoplanet detection. We use a detailed finite element
model to relate the temperature gradient at the location of the primary mirror
to wavefront variations on... | astro-ph_IM |
Analysis techniques and performance of the Domino Ring Sampler version 4
based readout for the MAGIC telescopes: Recently the readout of the MAGIC telescopes has been upgraded to a new
system based on the Domino Ring Sampler version 4 chip. We present the analysis
techniques and the signal extraction performance stud... | astro-ph_IM |
A Template-Based Approach to the Photometric Classification of SN
1991bg-like Supernovae in the SDSS-II Supernova Survey: The use of Type Ia Supernovae (SNe Ia) to measure cosmological parameters has
grown significantly over the past two decades. However, there exists a
significant diversity in the SN Ia population t... | astro-ph_IM |
Potential for measuring the longitudinal and lateral profile of muons in
TeV air showers with IACTs: Muons are copiously produced within hadronic extensive air showers (EAS)
occurring in the Earth's atmosphere, and are used by particle air shower
detectors as a means of identifying the primary cosmic ray which initia... | astro-ph_IM |
Angular control noise in Advanced Virgo and implications for the
Einstein Telescope: With significantly improved sensitivity, the Einstein Telescope (ET), along
with other upcoming gravitational wave detectors, will mark the beginning of
precision gravitational wave astronomy. However, the pursuit of surpassing
curre... | astro-ph_IM |
A High-Resolution Atlas of Uranium-Neon in the H Band: We present a high-resolution (R ~ 50 000) atlas of a uranium-neon (U/Ne)
hollow-cathode spectrum in the H-band (1454 nm to 1638 nm) for the calibration
of near-infrared spectrographs. We obtained this U/Ne spectrum simultaneously
with a laser-frequency comb spectru... | astro-ph_IM |
The Cherenkov Telescope Array: layout, design and performance: The Cherenkov Telescope Array (CTA) will be the next generation
very-high-energy gamma-ray observatory. CTA is expected to provide substantial
improvement in accuracy and sensitivity with respect to existing instruments
thanks to a tenfold increase in the n... | astro-ph_IM |
Photometric Data-driven Classification of Type Ia Supernovae in the Open
Supernova Catalog: We propose a novel approach for a machine-learning-based detection of the
type Ia supernovae using photometric information. Unlike other approaches, only
real observation data is used during training. Despite being trained on ... | astro-ph_IM |
Shrinkage MMSE estimators of covariances beyond the zero-mean and
stationary variance assumptions: We tackle covariance estimation in low-sample scenarios, employing a
structured covariance matrix with shrinkage methods. These involve convexly
combining a low-bias/high-variance empirical estimate with a biased
regula... | astro-ph_IM |
Calculation of the Cherenkov light yield from low energetic secondary
particles accompanying high-energy muons in ice and water with Geant 4
simulations: In this work we investigate and parameterize the amount and angular
distribution of Cherenkov photons, which are generated by low-energy secondary
particles (typi... | astro-ph_IM |
A New Method for Determining Geometry of Planetary Images: This paper presents a novel semi-automatic image processing technique to
estimate accurately, and objectively, the disc parameters of a planetary body
on an astronomical image. The method relies on the detection of the limb and/or
the terminator of the planetar... | astro-ph_IM |
Analysis of defect formation in semiconductor cryogenic bolometric
detectors created by heavy dark matter: The cryogenic detectors in the form of bolometers are presently used for
different applications, in particular for very rare or hypothetical events
associated with new forms of matter, specifically related to th... | astro-ph_IM |
Last performances improvement of the C-RED One camera using the 320x256
e-APD infrared Saphira detector: We present here the latest results obtained with the C-RED One camera
developed by First Light Imaging for fast ultra-low noise infrared
applications. This camera uses the Leonardo Saphira e-APD 320x256 infrared
s... | astro-ph_IM |
(H)DPGMM: A Hierarchy of Dirichlet Process Gaussian Mixture Models for
the inference of the black hole mass function: We introduce (H)DPGMM, a hierarchical Bayesian non-parametric method based on
the Dirichlet Process Gaussian Mixture Model, designed to infer data-driven
population properties of astrophysical objects... | astro-ph_IM |
Reconstruction of radio signals from air-showers with autoencoder: The Tunka Radio Extension (Tunka-Rex) is a digital antenna array (63 antennas
distributed over 1km^2) co-located with the TAIGA observatory in Eastern
Siberia. Tunka-Rex measures radio emission of air-showers induced by ultra-high
energy cosmic rays in ... | astro-ph_IM |
Analysing Astronomy Algorithms for GPUs and Beyond: Astronomy depends on ever increasing computing power. Processor clock-rates
have plateaued, and increased performance is now appearing in the form of
additional processor cores on a single chip. This poses significant challenges
to the astronomy software community. Gr... | astro-ph_IM |
RFI excision using a higher order statistics analysis of the power
spectrum: A method of radio frequency interference (RFI) suppression in radio astronomy
spectral observations is described based on the analysis of the probability
distribution of an instantaneous spectrum. This method allows the separation of
the gau... | astro-ph_IM |
Discovery and Characterization of a Faint Stellar Companion to the A3V
Star Zeta Virginis: Through the combination of high-order Adaptive Optics and coronagraphy, we
report the discovery of a faint stellar companion to the A3V star zeta
Virginis. This companion is ~7 magnitudes fainter than its host star in the
H-ban... | astro-ph_IM |
HiFLEx -- a highly flexible package to reduce cross-dispersed echelle
spectra: We describe a flexible data reduction package for high resolution
cross-dispersed echelle data. This open-source package is developed in Python
and includes optional GUIs for most of the steps. It does not require any
pre-knowledge about t... | astro-ph_IM |
A Versatile Technique to Enable sub-milli-Kelvin Instrument Stability
for Precise Radial Velocity Measurements: Tests with the Habitable-zone
Planet Finder: Insufficient instrument thermo-mechanical stability is one of the many
roadblocks for achieving 10cm/s Doppler radial velocity (RV) precision, the
precision ne... | astro-ph_IM |
Mitigating radio frequency interference in CHIME/FRB real-time intensity
data: Extragalactic fast radio bursts (FRBs) are a new class of astrophysical
transients with unknown origins that have become a main focus of radio
observatories worldwide. FRBs are highly energetic ($\sim 10^{36}$-$10^{42}$
ergs) flashes that ... | astro-ph_IM |
Prototype Open Event Reconstruction Pipeline for the Cherenkov Telescope
Array: The Cherenkov Telescope Array (CTA) is the next-generation gamma-ray
observatory currently under construction. It will improve over the current
generation of imaging atmospheric Cherenkov telescopes (IACTs) by a factor of
five to ten in s... | astro-ph_IM |
Unit panel nodes detection by CNN on FAST reflector: The 500-meter Aperture Spherical Radio Telescope(FAST) has an active
reflector. During the observation, the reflector will be deformed into a
paraboloid of 300-meters. To improve its surface accuracy, we propose a scheme
for photogrammetry to measure the positions of... | astro-ph_IM |
An optimal method for scheduling observations of large sky error regions
for finding optical counterparts to transients: The discovery and subsequent study of optical counterparts to transient
sources is crucial for their complete astrophysical understanding. Various
gamma ray burst (GRB) detectors, and more notably ... | astro-ph_IM |
Gamma-Ray Telescopes (in "400 Years of Astronomical Telescopes"): The last half-century has seen dramatic developments in gamma-ray telescopes,
from their initial conception and development through to their blossoming into
full maturity as a potent research tool in astronomy. Gamma-ray telescopes are
leading research i... | astro-ph_IM |
A deep learning framework for jointly extracting spectra and
source-count distributions in astronomy: Astronomical observations typically provide three-dimensional maps, encoding
the distribution of the observed flux in (1) the two angles of the celestial
sphere and (2) energy/frequency. An important task regarding s... | astro-ph_IM |
Laue lenses: Focusing optics for hard X/soft Gamma-ray Astronomy: Hard X-/soft Gamma-ray astronomy is a key field for the study of important
astrophysical phenomena such as the electromagnetic counterparts of
gravitational waves, gamma-ray bursts, black holes physics and many more.
However, the spatial localization, im... | astro-ph_IM |
On-sky measurements of atmospheric dispersion: I. Method validation: Observations with ground-based telescopes are affected by differential
atmospheric dispersion due to the wavelength-dependent index of refraction of
the atmosphere. The usage of an Atmospheric Dispersion Corrector (ADC) is
fundamental to compensate th... | astro-ph_IM |
Calibration of Radio Interferometers Using a Sparse DoA Estimation
Framework: The calibration of modern radio interferometers is a significant challenge,
specifically at low frequencies. In this perspective, we propose a novel
iterative calibration algorithm, which employs the popular sparse
representation framework,... | astro-ph_IM |
Status of the TREND project: The Tianshan Radio Experiment for Neutrino Detection (TREND) is a sino-french
collaboration (CNRS/IN2P3 and Chinese Academy of Science) developing an
autonomous antenna array for the detection of high energy Extensive Air Showers
(EAS) on the site of the 21CMA radio observatory. The autonom... | astro-ph_IM |
Application of the TPB Wavelength Shifter to the DEAP-3600 Spherical
Acrylic Vessel Inner Surface: DEAP-3600 uses liquid argon contained in a spherical acrylic vessel as a
target medium to perform a sensitive spin-independent dark matter search. Argon
scintillates in the vacuum ultraviolet spectrum, which requires wa... | astro-ph_IM |
Imaging Atmospheric Cherenkov Telescopes pointing determination using
the trajectories of the stars in the field of view: We present a new approach to the pointing determination of Imaging
Atmospheric Cherenkov Telescopes (IACTs). This method is universal and can be
applied to any IACT with minor modifications. It us... | astro-ph_IM |
The Gaia Mission, Binary Stars and Exoplanets: On the 19th of December 2013, the Gaia spacecraft was successfully launched
by a Soyuz rocket from French Guiana and started its amazing journey to map and
characterise one billion celestial objects with its one billion pixel camera.
In this presentation, we briefly review... | astro-ph_IM |
The Radio Sky on Short Timescales with LOFAR: Pulsars and Fast
Transients: LOFAR, the "low-frequency array", will be one of the first in a new
generation of radio telescopes and Square Kilometer Array (SKA) pathfinders
that are highly flexible in capability because they are largely software
driven. LOFAR will not onl... | astro-ph_IM |
Search for extreme energy cosmic ray candidates in the TUS orbital
experiment data: TUS (Track Ultraviolet Setup) is the first space experiment aimed to check
the possibility of registering extreme energy cosmic rays (EECRs) at E>50 EeV
by measuring the fluorescence signal of extensive air showers in the
atmosphere. ... | astro-ph_IM |
Optical Astronomical Facilities at Nainital, India: Aryabhatta Research Institute of Observational Sciences (acronym ARIES)
operates a 1-m aperture optical telescope at Manora Peak, Nainital since 1972.
Considering the need and potential of establishing moderate size optical
telescope with spectroscopic capability at t... | astro-ph_IM |
Using transfer learning to detect galaxy mergers: We investigate the use of deep convolutional neural networks (deep CNNs) for
automatic visual detection of galaxy mergers. Moreover, we investigate the use
of transfer learning in conjunction with CNNs, by retraining networks first
trained on pictures of everyday object... | astro-ph_IM |
fcmaker: automating the creation of ESO-compliant finding charts for
Observing Blocks on p2: fcmaker is a python module that creates astronomical finding charts for
Observing Blocks (OBs) on the p2 web server from the European Southern
Observatory (ESO). It provides users with the ability to automate the creation
of ... | astro-ph_IM |
The Infrared Imaging Spectrograph (IRIS) for TMT: Prototyping of
cryogenic compatible stage for the Imager: The IRIS Imager requires opt-mechanical stages which are operable under
vacuum and cryogenic environment. Also the stage for the IRIS Imager is
required to survive for 10 years without maintenance. To achieve t... | astro-ph_IM |
Adaptive pupil masking for quasi-static speckle suppression: Quasi-static speckles are a current limitation to faint companion imaging of
bright stars. Here we show through simulation and theory that an adaptive pupil
mask can be used to reduce these speckles and increase the visibility of faint
companions. This is ach... | astro-ph_IM |
Comparative Analysis of the Observational Properties of Fast Radio
Bursts at the Frequencies of 111 and 1400 MHz: A comparative analysis of the observational characteristics of fast radio
bursts at the frequencies 111 and 1400 MHz is carried out. The distributions of
radio bursts by the dispersion measure are constru... | astro-ph_IM |
Applications for Microwave Kinetic Induction Detectors in Advanced
Instrumentation: In recent years Microwave Kinetic Inductance Detectors (MKIDs) have emerged
as one of the most promising novel low temperature detector technologies. Their
unrivaled scalability makes them very attractive for many modern applications
... | astro-ph_IM |
X-ray performance of a customized large-format scientifc CMOS detector: In recent years, the performance of Scientifc Complementary Metal Oxide
Semiconductor (sCMOS) sensors has been improved signifcantly. Compared with CCD
sensors, sCMOS sensors have various advantages, making them potentially better
devices for optic... | astro-ph_IM |
Design and operation of the ATLAS Transient Science Server: The Asteroid Terrestrial impact Last Alert System (ATLAS) system consists of
two 0.5m Schmidt telescopes with cameras covering 29 square degrees at plate
scale of 1.86 arcsec per pixel. Working in tandem, the telescopes routinely
survey the whole sky visible f... | astro-ph_IM |
Planck LFI flight model feed horns: this paper is part of the Prelaunch status LFI papers published on JINST:
http://www.iop.org/EJ/journal/-page=extra.proc5/jinst The Low Frequency
Instrument is optically interfaced with the ESA Planck telescope through 11
corrugated feed horns each connected to the Radiometer Chain A... | astro-ph_IM |
Investigation of Correction Method of the Spacecraft Low Altitude
Ranging: gamma ray altitude control system is an important equipment for deep space
exploration and sample return mission, its main purpose is a low altitude
measurement of the spacecraft based on Compton Effect at the moment when it
lands on extraterr... | astro-ph_IM |
Amplitude Correction Factors of KVN Observations: We report results of investigation of amplitude calibration for very long
baseline interferometry (VLBI) observations with Korean VLBI Network (KVN).
Amplitude correction factors are estimated based on comparison of KVN
observations at 22~GHz correlated by Daejeon hardw... | astro-ph_IM |
High-speed X-ray imaging spectroscopy system with Zynq SoC for solar
observations: We have developed a system combining a back-illuminated
Complementary-Metal-Oxide-Semiconductor (CMOS) imaging sensor and Xilinx Zynq
System-on-Chip (SoC) device for a soft X-ray (0.5-10 keV) imaging spectroscopy
observation of the Sun... | astro-ph_IM |
The PRL 2.5m Telescope and its First Light Instruments: FOC & PARAS-2: We present here the information on the design and performance of the recently
commissioned 2.5-meter telescope at the PRL Mount Abu Observatory, located at
Gurushikhar, Mount Abu, India. The telescope has been successfully installed at
the site, and... | astro-ph_IM |
Investigation of dust grains by optical tweezers for space applications: Cosmic dust plays a dominant role in the universe, especially in the
formation of stars and planetary systems. Furthermore, the surface of cosmic
dust grains is the bench-work where molecular hydrogen and simple organic
compounds are formed. We ma... | astro-ph_IM |
The Chinese space millimeter-wavelength VLBI array - a step toward
imaging the most compact astronomical objects: The Shanghai Astronomical Observatory (SHAO) of the Chinese Academy of
Sciences (CAS) is studying a space VLBI (Very Long Baseline Interferometer)
program. The ultimate objective of the program is to imag... | astro-ph_IM |
A Floating Octave Bandwidth Cone-Disc Antenna for Detection of Cosmic
Dawn: The critical component of radio astronomy radiometers built to detect
redshifted 21-cm signals from Cosmic Dawn is the antenna element. We describe
the design and performance of an octave bandwidth cone disc antenna built to
detect this signa... | astro-ph_IM |
Reconstruction of signals with unknown spectra in information field
theory with parameter uncertainty: The optimal reconstruction of cosmic metric perturbations and other signals
requires knowledge of their power spectra and other parameters. If these are
not known a priori, they have to be measured simultaneously fr... | astro-ph_IM |
Real-time Adaptive Optics with pyramid wavefront sensors: Accurate
wavefront reconstruction using iterative methods: In this paper, we address the inverse problem of fast, stable, and
high-quality wavefront reconstruction from pyramid wavefront sensor data for
Adaptive Optics systems on Extremely Large Telescopes. Fo... | astro-ph_IM |
Two-element interferometer for millimeter-wave solar flare observations: In this paper, we present the design and implementation of a two-element
interferometer working in the millimeter wave band (39.5 GHz - 40 GHz) for
observing solar radio emissions through nulling interference. The system is
composed of two 50 cm a... | astro-ph_IM |
Quasar Microlensing Models with Constraints on the Quasar Light Curves: Quasar microlensing analyses implicitly generate a model of the variability
of the source quasar. The implied source variability may be unrealistic yet its
likelihood is generally not evaluated. We used the damped random walk (DRW)
model for quasar... | astro-ph_IM |
SPHERE on-sky performance compared with budget predictions: The SPHERE (spectro-photometric exoplanet research) extreme-AO planet hunter
saw first light at the VLT observatory on Mount Paranal in May 2014 after ten
years of development. Great efforts were put into modelling its performance,
particularly in terms of ach... | astro-ph_IM |
Detailed Studies of Atmospheric Calibration in Imaging Cherenkov
Astronomy: The current generation of Imaging Atmospheric Cherenkov telescopes are
allowing the sky to be probed with greater sensitivity than ever before in the
energy range around and above 100 GeV. To minimise the systematic errors on
derived fluxes a... | astro-ph_IM |
Visualising three-dimensional volumetric data with an arbitrary
coordinate system: Astronomical data does not always use Cartesian coordinates. Both all-sky
observational data and simulations of rotationally symmetric systems, such as
accretion and protoplanetary discs, may use spherical polar or other coordinate
sys... | astro-ph_IM |
Fast gravitational wave parameter estimation without compromises: We present a lightweight, flexible, and high-performance framework for
inferring the properties of gravitational-wave events. By combining likelihood
heterodyning, automatically-differentiable and accelerator-compatible
waveforms, and gradient-based Mark... | astro-ph_IM |
Application of Deep Learning methods to analysis of Imaging Atmospheric
Cherenkov Telescopes data: Ground based gamma-ray observations with Imaging Atmospheric Cherenkov
Telescopes (IACTs) play a significant role in the discovery of very high energy
(E > 100 GeV) gamma-ray emitters. The analysis of IACT data demands ... | astro-ph_IM |
METAPHOR: Probability density estimation for machine learning based
photometric redshifts: We present METAPHOR (Machine-learning Estimation Tool for Accurate
PHOtometric Redshifts), a method able to provide a reliable PDF for photometric
galaxy redshifts estimated through empirical techniques. METAPHOR is a modular
w... | astro-ph_IM |
Characterization and Optimization of Skipper CCDs for the SOAR Integral
Field Spectrograph: We present results from the characterization and optimization of six Skipper
CCDs for use in a prototype focal plane for the SOAR Integral Field
Spectrograph (SIFS). We tested eight Skipper CCDs and selected six for SIFS
based... | astro-ph_IM |
IVOA Recommendation: Simple Cone Search Version 1.03: This specification defines a simple query protocol for retrieving records
from a catalog of astronomical sources. The query describes sky position and an
angular distance, defining a cone on the sky. The response returns a list of
astronomical sources from the catal... | astro-ph_IM |
Effect of filters on the time-delay interferometry residual laser noise
for LISA: The Laser Interferometer Space Antenna (LISA) is a European Space Agency
mission that aims to measure gravitational waves in the millihertz range. Laser
frequency noise enters the interferometric measurements and dominates the
expected ... | astro-ph_IM |
The BlueMUSE data reduction pipeline: lessons learned from MUSE and
first design choices: BlueMUSE is an integral field spectrograph in an early development stage for
the ESO VLT. For our design of the data reduction software for this instrument,
we are first reviewing capabilities and issues of the pipeline of the e... | astro-ph_IM |
Ground-based gamma-ray telescopes as ground stations in deep-space
lasercom: As the amount of information to be transmitted from deep-space rapidly
increases, the radiofrequency technology has become a bottleneck in space
communications. RF is already limiting the scientific outcome of deep-space
missions and could b... | astro-ph_IM |
Characterization of a dense aperture array for radio astronomy: EMBRACE@Nancay is a prototype instrument consisting of an array of 4608
densely packed antenna elements creating a fully sampled, unblocked aperture.
This technology is proposed for the Square Kilometre Array and has the
potential of providing an extremely... | astro-ph_IM |
(Very)-High-Energy Gamma-Ray Astrophysics: the Future: Several projects planned or proposed can significantly expand our knowledge
of the high-energy Universe in gamma rays. Construction of the Cherenkov
telescope array CTA is started, and other detectors are planned which will use
the reconstruction of extensive air s... | astro-ph_IM |
Importance of charge capture in inter-phase regions during readout of
charge-coupled devices: The current understanding of charge transfer dynamics in Charge-Coupled
Devices (CCDs) is that charge is moved so quickly from one phase to the next in
a clocking sequence and with a density so low that trapping of charge in... | astro-ph_IM |
Spectral and polarimetric characterization of the Gas Pixel Detector
filled with dimethyl ether: The Gas Pixel Detector belongs to the very limited class of gas detectors
optimized for the measurement of X-ray polarization in the emission of
astrophysical sources. The choice of the mixture in which X-ray photons are
... | astro-ph_IM |
X-ray Astronomy in the Laboratory with a Miniature Compact Object
Produced by Laser-Driven Implosion: Laboratory spectroscopy of non-thermal equilibrium plasmas photoionized by
intense radiation is a key to understanding compact objects, such as black
holes, based on astronomical observations. This paper describes an... | astro-ph_IM |
Robust period estimation using mutual information for multi-band light
curves in the synoptic survey era: The Large Synoptic Survey Telescope (LSST) will produce an unprecedented
amount of light curves using six optical bands. Robust and efficient methods
that can aggregate data from multidimensional sparsely-sampled... | astro-ph_IM |
The PAU Survey: Narrow-band image photometry: PAUCam is an innovative optical narrow-band imager mounted at the William
Herschel Telescope built for the Physics of the Accelerating Universe Survey
(PAUS). Its set of 40 filters results in images that are complex to calibrate,
with specific instrumental signatures that c... | astro-ph_IM |
The design of the Ali CMB Polarization Telescope receiver: Ali CMB Polarization Telescope (AliCPT-1) is the first CMB degree-scale
polarimeter to be deployed on the Tibetan plateau at 5,250m above sea level.
AliCPT-1 is a 90/150 GHz 72 cm aperture, two-lens refracting telescope cooled
down to 4 K. Alumina lenses, 800mm... | astro-ph_IM |
BATATA: A device to characterize the punch-through observed in
underground muon detectors and to operate as a prototype for AMIGA: BATATA is a hodoscope comprising three X-Y planes of plastic scintillation
detectors. This system of buried counters is complemented by an array of 3
water-Cherenkov detectors, located at... | astro-ph_IM |
DIPol-UF: simultaneous three-color ($BVR$) polarimeter with EM CCDs: We describe a new instrument capable of high precision ($10^{-5}$)
polarimetric observations simultaneously in three passbands ($BVR$). The
instrument utilizes electron-multiplied EM CCD cameras for high efficiency and
fast image readout. The key feat... | astro-ph_IM |
QUBIC V: Cryogenic system design and performance: Current experiments aimed at measuring the polarization of the Cosmic
Microwave Background (CMB) use cryogenic detector arrays and cold optical
systems to boost the mapping speed of the sky survey. For these reasons, large
volume cryogenic systems, with large optical wi... | astro-ph_IM |
Inferring kilonova population properties with a hierarchical Bayesian
framework I : Non-detection methodology and single-event analyses: We present ${\tt nimbus}$ : a hierarchical Bayesian framework to infer the
intrinsic luminosity parameters of kilonovae (KNe) associated with
gravitational-wave (GW) events, based p... | astro-ph_IM |
EAGLE Spectroscopy of Resolved Stellar Populations Beyond the Local
Group: We give an overview of the science case for spectroscopy of resolved stellar
populations beyond the Local Group with the European Extremely Large Telescope
(E-ELT). In particular, we present science simulations undertaken as part of
the EAGLE ... | astro-ph_IM |
How to Calculate Molecular Column Density: The calculation of the molecular column density from molecular spectral
(rotational or ro-vibrational) transition measurements is one of the most basic
quantities derived from molecular spectroscopy. Starting from first principles
where we describe the basic physics behind the... | astro-ph_IM |
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 instrument capable of
high astrometric acc... | astro-ph_IM |
Towards Extremely Precise Radial Velocities: I. Simulated Solar Spectra
for Testing Exoplanet Detection Algorithms: Recent and upcoming stabilized spectrographs are pushing the frontier for
Doppler spectroscopy to detect and characterize low-mass planets.
Specifications for these instruments are so impressive that in... | astro-ph_IM |
The CASA software for radio astronomy: status update from ADASS 2019: CASA, the Common Astronomy Software Applications package, is the primary data
processing software for the Atacama Large Millimeter/submillimeter Array (ALMA)
and NSF's Karl G. Jansky Very Large Array (VLA), and is frequently used also
for other radio... | astro-ph_IM |
A dipole amplifier for electric dipole moments, axion-like particles and
a dense dark matter hairs detector: A tool that can constrain, in minutes, beyond-the-standard-model parameters
like electric dipole moments (EDM) down to a lower-bound
$d_\text{e}^{\cal{N}}<10^{-37}\text{e}\cdot\text{cm}$ in bulk materials, or ... | astro-ph_IM |
Generating Electron Beam Lithography Write Parameters from the FORTIS
Holographic Grating Solution: The Far-UV Off Rowland-circle Telescope for Imaging and Spectroscopy (FORTIS)
has been successful in maturing technologies for carrying out multi-object
spectroscopy in the far-UV, including: the successful implementat... | astro-ph_IM |
A detection system to measure muon-induced neutrons for direct Dark
Matter searches: Muon-induced neutrons constitute a prominent background component in a number
of low count rate experiments, namely direct searches for Dark Matter. In this
work we describe a neutron detector to measure this background in an
undergr... | astro-ph_IM |
Automatic quantitative morphological analysis of interacting galaxies: The large number of galaxies imaged by digital sky surveys reinforces the
need for computational methods for analyzing galaxy morphology. While the
morphology of most galaxies can be associated with a stage on the Hubble
sequence, morphology of gala... | astro-ph_IM |
Refine Neutrino Events Reconstruction with BEiT-3: Neutrino Events Reconstruction has always been crucial for IceCube Neutrino
Observatory. In the Kaggle competition "IceCube -- Neutrinos in Deep Ice", many
solutions use Transformer. We present ISeeCube, a pure Transformer model based
on TorchScale (the backbone of BEi... | astro-ph_IM |
Understanding our Galaxy - key contributions from the Parkes telescope: Young massive stars, with their spectacular masers and HII regions, dominate
our Galaxy, and are a cornerstone for understanding Galactic structure. I will
highlight the role of Parkes in contributing to these studies - past, present
and future. | astro-ph_IM |
Summary of the 14th IACHEC Meeting: We summarize the 14th meeting of the International Astronomical Consortium
for High Energy Calibration (IACHEC) held at \textit{Shonan Village} (Kanagawa,
Japan) in May 2019. Sixty scientists directly involved in the calibration of
operational and future high-energy missions gathered... | astro-ph_IM |
On-sky validation of image-based adaptive optics wavefront sensor
referencing: Differentiating between an exoplanet signal and residual speckle noise is a
key challenge in high-contrast imaging. Speckles are due to a combination of
fast, slow and static wavefront aberrations introduced by atmospheric
turbulence and i... | astro-ph_IM |
DESCQA: An Automated Validation Framework for Synthetic Sky Catalogs: The use of high-quality simulated sky catalogs is essential for the success
of cosmological surveys. The catalogs have diverse applications, such as
investigating signatures of fundamental physics in cosmological observables,
understanding the effect... | astro-ph_IM |
Measurement of low-energy background events due to $^{222}$Rn
contamination on the surface of a NaI(Tl) crystal: It has been known that decays of daughter elements of $^{222}$Rn on the
surface of a detector cause significant background at energies below 10 keV. In
particular $^{210}$Pb and $^{210}$Po decays on the cr... | astro-ph_IM |
Daytime Seeing and Solar Limb Positions: A method to measure the seeing from video made during drift-scan solar
transits is proposed. The limb of the Sun is projected over a regular grid
evenly spaced. The temporal dispersion of the time intervals among the contacts
between solar limb and grid's rows is proportional to... | astro-ph_IM |
Gravitational Microlensing Events as a Target for SETI project: Detection of signals from a possible extrasolar technological civilization is
one of the challenging efforts of science. In this work, we propose using
natural telescopes made of single or binary gravitational lensing systems to
magnify leakage of electrom... | astro-ph_IM |
Probing Radio Intensity at high-Z from Marion: 2017 Instrument: We introduce Probing Radio Intensity at high-Z from Marion (PRIZM), a new
experiment designed to measure the globally averaged sky brightness, including
the expected redshifted 21 cm neutral hydrogen absorption feature arising from
the formation of the fir... | astro-ph_IM |
Improved Measurement of the Spectral Index of the Diffuse Radio
Background Between 90 and 190 MHz: We report absolutely calibrated measurements of diffuse radio emission
between 90 and 190 MHz from the Experiment to Detect the Global EoR Signature
(EDGES). EDGES employs a wide beam zenith-pointing dipole antenna cent... | astro-ph_IM |
Auto-RSM: an automated parameter-selection algorithm for the RSM map
exoplanet detection algorithm: Most of the high-contrast imaging (HCI) data-processing techniques used over
the last 15 years have relied on the angular differential imaging (ADI)
observing strategy, along with subtraction of a reference point sprea... | astro-ph_IM |
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