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WTF? Discovering the Unexpected in next-generation radio continuum
surveys: Most major discoveries in astronomy have come from unplanned discoveries made
by surveying the Universe in a new way, rather than by testing a hypothesis or
conducting an investigation with planned outcomes. Next generation radio
continuum su... | astro-ph_IM |
Radio Weak Lensing Shear Measurement in the Visibility Domain - II.
Source Extraction: This paper extends the method introduced in Rivi et al. (2016b) to measure
galaxy ellipticities in the visibility domain for radio weak lensing surveys.
In that paper we focused on the development and testing of the method for the
... | astro-ph_IM |
Calibration of force actuators on an adaptive secondary prototype: In the context of the Large Binocular Telescope project, we present the
results of force actuator calibrations performed on an adaptive secondary
prototype called P45, a thin deformable glass with magnets glued onto its back.
Electromagnetic actuators, ... | astro-ph_IM |
Starbugs: all-singing, all-dancing fibre positioning robots: Starbugs are miniature piezoelectric 'walking' robots with the ability to
simultaneously position many optical fibres across a telescope's focal plane.
Their simple design incorporates two piezoceramic tubes to form a pair of
concentric 'legs' capable of taki... | astro-ph_IM |
Discovering Strongly-lensed QSOs From Unresolved Light Curves: We present a new method of discovering galaxy-scale, strongly-lensed QSO
systems from unresolved light curves using the autocorrelation function. The
method is tested on five rungs of simulated light curves from the Time Delay
Challenge 1 that were designed... | astro-ph_IM |
Matched filtering for gravitational wave detection without template bank
driven by deep learning template prediction model bank: The existing matched filtering method for gravitational wave (GW) search
relies on a template bank. The computational efficiency of this method scales
with the size of the templates within ... | astro-ph_IM |
Camera Calibration for the IceCube Upgrade and Gen2: An upgrade to the IceCube Neutrino Telescope is currently under construction.
For this IceCube Upgrade, seven new strings will be deployed in the central
region of the 86 string IceCube detector to enhance the capability to detect
neutrinos in the GeV range. One of t... | astro-ph_IM |
Asymptotic Orbits in Barred Spiral Galaxies: We study the formation of the spiral structure of barred spiral galaxies,
using an $N$-body model. The evolution of this $N$-body model in the adiabatic
approximation maintains a strong spiral pattern for more than 10 bar rotations.
We find that this longevity of the spiral ... | astro-ph_IM |
Photostability of gas- and solid-phase biomolecules within dense
molecular clouds due to soft X-rays: An experimental photochemistry study involving gas- and solid-phase amino
acids (glycine, DL-valine, DL-proline) and nucleobases (adenine and uracil)
under soft X-rays was performed. The aim was to test the molecular... | astro-ph_IM |
Time-division SQUID multiplexers with reduced sensitivity to external
magnetic fields: Time-division SQUID multiplexers are used in many applications that require
exquisite control of systematic error. One potential source of systematic error
is the pickup of external magnetic fields in the multiplexer. We present
me... | astro-ph_IM |
eROSITA on SRG: a X-ray all-sky survey mission: eROSITA (extended ROentgen Survey with an Imaging Telescope Array) is the
core instrument on the Russian Spektrum-Roentgen-Gamma (SRG) mission which is
scheduled for launch in late 2012. eROSITA is fully approved and funded by the
German Space Agency DLR and the Max-Planc... | astro-ph_IM |
Gaia reference frame amid quasar variability and proper motion patterns
in the data: Gaia's very accurate astrometric measurements will allow the International
Celestial Reference Frame (ICRF) to be improved by a few orders of magnitude in
the optical. Several sets of quasars are used to define a kinematically stable... | astro-ph_IM |
MAORY AO performances: The Multi-conjugate Adaptive Optics RelaY (MAORY) should provide 30% SR in K
band (50% goal) on half of the sky at the South Galactic Pole. Assessing its
performance and the sensitivity to parameter variations during the design phase
is a fundamental step for the engineering of such a complex sys... | astro-ph_IM |
A way to deal with the fringe-like pattern in VIMOS-IFU data: The use of integral field units is now commonplace at all major observatories
offering efficient means of obtaining spectral as well as imaging information
at the same time. IFU instrument designs are complex and spectral images have
typically highly condens... | astro-ph_IM |
A Near Infrared Laser Frequency Comb for High Precision Doppler Planet
Surveys: We discuss the laser frequency comb as a near infrared astronomical
wavelength reference, and describe progress towards a near infrared laser
frequency comb at the National Institute of Standards and Technology and at the
University of Co... | astro-ph_IM |
An Inexpensive Liquid Crystal Spectropolarimeter for the Dominion
Astrophysical Observatory Plaskett Telescope: A new, inexpensive polarimetric unit has been constructed for the Dominion
Astrophysical Observatory (DAO) 1.8-m Plaskett telescope. It is implemented as
a plug-in module for the telescope's existing Casseg... | astro-ph_IM |
Astronomical seeing and ground-layer turbulence in the Canadian High
Arctic: We report results of a two-year campaign of measurements, during arctic
winter darkness, of optical turbulence in the atmospheric boundary-layer above
the Polar Environment Atmospheric Laboratory in northern Ellesmere Island
(latitude +80 de... | astro-ph_IM |
pyCallisto: A Python Library To Process The CALLISTO Spectrometer Data: CALLISTO is a radio spectrometer designed to monitor the transient radio
emissions/bursts originated from the solar corona in the frequency range
$45-870$ MHz. At present, there are $\gtrsim 150$ stations (together forms an
e-CALLISTO network) arou... | astro-ph_IM |
Correcting Bandwidth Depolarization by Extreme Faraday Rotation: Measurements of the polarization of radio emission are subject to a number of
depolarization effects such as bandwidth depolarization, which is caused by the
averaging effect of a finite channel bandwidth combined with the
frequency-dependent polarization... | astro-ph_IM |
The Multi-slit Approach to Coronal Spectroscopy with the Multi-slit
Solar Explorer (MUSE): The Multi-slit Solar Explorer (MUSE) is a proposed mission aimed at
understanding the physical mechanisms driving the heating of the solar corona
and the eruptions that are at the foundation of space weather. MUSE contains
two ... | astro-ph_IM |
The Road to Quasars: Although the extragalactic nature of 3C 48 and other quasi stellar radio
sources was discussed as early as 1960 by John Bolton and others, it was
rejected largely because of preconceived ideas about what appeared to be
unrealistically high radio and optical luminosities. Not until the 1962
occultat... | astro-ph_IM |
Pulsar Candidate Identification Using Semi-Supervised Generative
Adversarial Networks: Machine learning methods are increasingly helping astronomers identify new
radio pulsars. However, they require a large amount of labelled data, which is
time consuming to produce and biased. Here we describe a Semi-Supervised
Gene... | 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 |
Fundamental limits to high-contrast wavefront control: The current generation of ground-based coronagraphic instruments uses
deformable mirrors to correct for phase errors and to improve contrast levels
at small angular separations. Improving these techniques, several space and
ground based instruments are currently de... | astro-ph_IM |
Short Spacing Synthesis from a Primary Beam Scanned Interferometer: Aperture synthesis instruments providing a generally highly uniform sampling
of the visibility function often leave an unsampled hole near the origin of the
(u,v)-plane. In this paper, originally published in 1979, we first describe the
common solution... | astro-ph_IM |
Trend Filtering -- II. Denoising Astronomical Signals with Varying
Degrees of Smoothness: Trend filtering---first introduced into the astronomical literature in Paper
I of this series---is a state-of-the-art statistical tool for denoising
one-dimensional signals that possess varying degrees of smoothness. In this
wor... | astro-ph_IM |
Processing System for Coherent Dedispersion of Pulsar Radio Emission: The work describes a system for converting VLBI observation data using the
algorithms of coherent dedispersion and compensation of two-bit signal
sampling. Coherent dedispersion is important for processing pulsar observations
to obtain the best tempo... | astro-ph_IM |
Dual Purpose Lyot Coronagraph Masks for Simultaneous High-Contrast
Imaging and High-Resolution Wavefront Sensing: Directly imaging Earth-sized exoplanets with a visible-light coronagraph
instrument on a space telescope will require a system that can achieve
$\sim10^{-10}$ raw contrast and maintain it for the duration... | astro-ph_IM |
Updated Inflight Calibration of Hayabusa2's Optical Navigation Camera
(ONC) for Scientific Observations during the Cruise Phase: The Optical Navigation Camera (ONC-T, ONC-W1, ONC-W2) onboard Hayabusa2 are
also being used for scientific observations of the mission target, C-complex
asteroid 162173 Ryugu. Science obser... | astro-ph_IM |
Optical NEP in Hot-Electron Nanobolometers: For the first time, we have measured the optical noise equivalent power (NEP)
in titanium (Ti) superconducting hot-electron nanobolometers (nano-HEBs). The
bolometers were 2{\mu}mx1{\mu}mx20nm and 1{\mu}mx1{\mu}mx20nm planar
antenna-coupled devices. The measurements were done... | astro-ph_IM |
Scintillation Pulse Shape Discrimination in a Two-Phase Xenon Time
Projection Chamber: The energy and electric field dependence of pulse shape discrimination in
liquid xenon have been measured in a 10 gm two-phase xenon time projection
chamber. We have demonstrated the use of the pulse shape and charge-to-light
ratio... | astro-ph_IM |
Ultra-sensitive Super-THz Microwave Kinetic Inductance Detectors for
future space telescopes: Future actively cooled space-borne observatories for the far-infrared,
loosely defined as a 1--10 THz band, can potentially reach a sensitivity
limited only by background radiation from the Universe. This will result in an
i... | astro-ph_IM |
New Periodograms Separating Orbital Radial Velocities and Spectral Shape
Variation: We present new periodograms that are effective in distinguishing Doppler
shift from spectral shape variability in astronomical spectra. These
periodograms, building upon the concept of partial distance correlation,
separate the period... | astro-ph_IM |
A new method of testing the gravitational redshift effect with radio
interferometers: We propose a new method to measure gravitational redshift effect using
simultaneous interferometric observations of a distant radio source to
synchronize clocks. The first order by $v/c$ contribution to the signal (the
classical Dop... | astro-ph_IM |
The performance of SiPM-based gamma-ray detector (GRD) of GECAM-C: As a new member of GECAM mission, the GECAM-C (also called High Energy Burst
Searcher, HEBS) is a gamma-ray all-sky monitor onboard SATech-01 satellite,
which was launched on July 27th, 2022 to detect gamma-ray transients from 6 keV
to 6 MeV, such as Ga... | astro-ph_IM |
PhotoNs-GPU:A GPU accelerated cosmological simulation code: We present a GPU-accelerated cosmological simulation code, PhotoNs-GPU, based
on algorithm of Particle Mesh Fast Multipole Method (PM-FMM), and focus on the
GPU utilization and optimization. A proper interpolated method for truncated
gravity is introduced to s... | astro-ph_IM |
Optical Characterization & Testbed Development for μ-Spec Integrated
Spectrometers: This paper describes a cryogenic optical testbed developed to characterize
u-Spec spectrometers in a dedicated dilution refrigerator (DR) system. u-Spec
is a far-infrared integrated spectrometer that is an analog to a Rowland-type
gra... | astro-ph_IM |
Measurement of turbulence profile from defocused ring images: A defocused image of a bright single star in a small telescope contains rich
information on the optical turbulence, i.e. the seeing. The concept of a novel
turbulence monitor based on recording sequences of ring-like intrafocal images
and their analysis is p... | astro-ph_IM |
Thermal architecture for the QUBIC cryogenic receiver: QUBIC, the QU Bolometric Interferometer for Cosmology, is a novel forthcoming
instrument to measure the B-mode polarization anisotropy of the Cosmic
Microwave Background. The detection of the B-mode signal will be extremely
challenging; QUBIC has been designed to a... | astro-ph_IM |
Cryogenic cooling with cryocooler on a rotating system: We developed a system that continuously maintains a cryocooler for long
periods on a rotating table. A cryostat that holds the cryocooler is set on the
table. A compressor is located on the ground and supplies high-purity (>
99.999%) and high-pressure (1.7 MPa) he... | astro-ph_IM |
A dual-mask coronagraph for observing faint companions to binary stars: Observations of binary stars for faint companions with conventional
coronagraphic methods are challenging, as both targets will be bright enough to
obscure any nearby faint companions if their scattered light is not suppressed.
We propose coronagra... | 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 |
Deep Generative Models of Gravitational Waveforms via Conditional
Autoencoder: We construct few deep generative models of gravitational waveforms based on
the semi-supervising scheme of conditional autoencoders and their variational
extensions. Once the training is done, we find that our best waveform model can
gener... | astro-ph_IM |
Ultra-Low-Frequency Radio Astronomy Observations from a Selenocentric
Orbit: first results of the Longjiang-2 experiment: This paper introduces the first results of observations with the
Ultra-Long-Wavelength (ULW) -- Low Frequency Interferometer and Spectrometer
(LFIS) on board the selenocentric satellite Longjiang-... | astro-ph_IM |
Geopolitical Implications of a Successful SETI Program: We discuss the recent "realpolitik" analysis of Wisian & Traphagan (2020,
W&T) of the potential geopolitical fallout of the success of SETI. They
conclude that "passive" SETI involves an underexplored yet significant risk
that, in the event of a successful, passiv... | astro-ph_IM |
Multi-Band Feeds: A Design Study: Broadband antenna feeds are of particular interest to existing and future
radio telescopes for multi-frequency studies of astronomical sources. Although
a 1:15 range in frequency is difficult to achieve, the well-known Eleven feed
design offers a relatively uniform response over such a... | astro-ph_IM |
Potential for Observing Methane on Mars Using Earth-based Extremely
Large Telescopes: The Red Planet has fascinated humans for millennia, especially for the last
few centuries, and particularly during the Space Age. The nagging suspicion of
extant Martian life is both fed by, and drives the many space missions to Mar... | astro-ph_IM |
A Bayesian approach to high fidelity interferometric calibration II:
demonstration with simulated data: In a companion paper, we presented BayesCal, a mathematical formalism for
mitigating sky-model incompleteness in interferometric calibration. In this
paper, we demonstrate the use of BayesCal to calibrate the degen... | astro-ph_IM |
Combine User's Manual: {\sc Combine} is an add-on to {\sc SigSpec} and {\sc Cinderella}. A {\sc
SigSpec} result file or a file generated by {\sc Cinderella} contains the
significant sinusoidal signal components in a time series. In this file, {\sc
Combine} checks one frequency after the other for being a linear combina... | astro-ph_IM |
VAST: An ASKAP Survey for Variables and Slow Transients: The Australian Square Kilometre Array Pathfinder (ASKAP) will give us an
unprecedented opportunity to investigate the transient sky at radio
wavelengths. In this paper we present VAST, an ASKAP survey for Variables and
Slow Transients. VAST will exploit the wide-... | astro-ph_IM |
A Novel Hybrid Algorithm for Lucky Imaging: Lucky imaging is a high-resolution astronomical image recovery technique with
two classic implementation algorithms, i.e. image selecting, shifting and
adding in image space and data selecting and image synthesizing in Fourier
space. This paper proposes a novel lucky imaging ... | astro-ph_IM |
A Statistical Framework for the Utilization of Simultaneous Pupil Plane
and Focal Plane Telemetry for Exoplanet Imaging, Part I: Accounting for
Aberrations in Multiple Planes: A new generation of telescopes with mirror diameters of 20 m or more, called
extremely large telescopes (ELTs) has the potential to provide ... | astro-ph_IM |
The GAMMA-400 gamma-ray telescope characteristics. Angular resolution
and electrons/protons separation: The measurements of gamma-ray fluxes and cosmic-ray electrons and positrons
in the energy range from 100 MeV to several TeV, which will be implemented by
the specially designed GAMMA-400 gamma-ray telescope, concer... | astro-ph_IM |
Two phase mixtures in SPH - A new approach: We present a new approach to simulating mixtures of gas and dust in smoothed
particle hydrodynamics (SPH). We show how the two-fluid equations can be
rewritten to describe a single-fluid 'mixture' moving with the barycentric
velocity, with each particle carrying a dust fracti... | astro-ph_IM |
GAPS: A New Cosmic Ray Anti-matter Experiment: The General AntiParticle Spectrometer (GAPS) is a balloon-borne instrument
designed to detect cosmic-ray antimatter using the novel exotic atom technique,
obviating the strong magnetic fields required by experiments like AMS, PAMELA,
or BESS. It will be sensitive to primar... | astro-ph_IM |
Earth-Moon VLBI project. Modeling of scientific outcome: Modern radio astrometry has reached the limit of the resolution that is
determined by the size of the Earth. The only way to overcome that limit is to
create the radio telescopes outside our planet. It is proposed to build an
autonomous remote-controlled radio ob... | astro-ph_IM |
Uploading User-Defined Functions onto the AMIDAS Website: The AMIDAS website has been established as an online interactive tool for
running simulations and analyzing data in direct Dark Matter detection
experiments. At the first phase of the website building, only some commonly
used WIMP velocity distribution functions... | astro-ph_IM |
Minimum-variance multitaper spectral estimation on the sphere: We develop a method to estimate the power spectrum of a stochastic process on
the sphere from data of limited geographical coverage. Our approach can be
interpreted either as estimating the global power spectrum of a stationary
process when only a portion o... | astro-ph_IM |
Noise reduction on single-shot images using an autoencoder: We present an application of autoencoders to the problem of noise reduction
in single-shot astronomical images and explore its suitability for upcoming
large-scale surveys. Autoencoders are a machine learning model that summarises
an input to identify its key ... | astro-ph_IM |
Numerical Error in Interplanetary Orbit Determination Software: The core of every orbit determination process is the comparison between the
measured observables and their predicted values, computed using the adopted
mathematical models, and the minimization, in a least square sense, of their
differences, known as resid... | astro-ph_IM |
Efficient modeling of correlated noise II. A flexible noise model with
fast and scalable methods: Correlated noise affects most astronomical datasets and to neglect accounting
for it can lead to spurious signal detections, especially in low
signal-to-noise conditions, which is often the context in which new discoveri... | astro-ph_IM |
A flexible method for estimating luminosity functions via Kernel Density
Estimation -- II. Generalization and Python implementation: We propose a generalization of our previous KDE (kernel density estimation)
method for estimating luminosity functions (LFs). This new upgrade further
extend the application scope of ou... | astro-ph_IM |
Cyclic Spectral Analysis of Radio Pulsars: Cyclic spectral analysis is a signal processing technique designed to deal
with stochastic signals whose statistics vary periodically with time. Pulsar
radio emission is a textbook example of this signal class, known as
cyclostationary signals. In this paper, we discuss the ap... | 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 |
Improved Image Quality Over 10' Fields with the `Imaka Ground Layer
Adaptive Optics Experiment: `Imaka is a ground layer adaptive optics (GLAO) demonstrator on the
University of Hawaii 2.2m telescope with a 24'x18' field-of-view, nearly an
order of magnitude larger than previous AO instruments. In 15 nights of
observ... | astro-ph_IM |
Collisionless Stellar Hydrodynamics as an Efficient Alternative to
N-body Methods: For simulations that deal only with dark matter or stellar systems, the
conventional N-body technique is fast, memory efficient, and relatively simple
to implement. However when including the effects of gas physics, mesh codes are
at a... | astro-ph_IM |
Preliminary Astrometric Results from Kepler: Although not designed as an astrometric instrument, Kepler is expected to
produce astrometric results of a quality appropriate to support many of the
astrophysical investigations enabled by its photometric results. On the basis
of data collected during the first few months o... | astro-ph_IM |
Provenance of astronomical data: In the context of Open Science, provenance has become a decisive piece of
information to provide along with astronomical data. Provenance is explicitly
cited in the FAIR principles, that aims to make research data Findable,
Accessible, Interoperable and Reusable. The IVOA Provenance Dat... | astro-ph_IM |
First Generation Heterodyne Instrumentation Concepts for the Atacama
Large Aperture Submillimeter Telescope: (abridged) The Atacama Large Aperture Submillimeter Telescope (AtLAST)
project aims to build a 50-m-class submm telescope with $>1^\circ$ field of
view, high in the Atacama Desert, providing fast and detailed ... | astro-ph_IM |
Improving Planet-Finding Spectrometers: Like the miniaturization of modern computers, next-generation radial velocity
instruments will be significantly smaller and more powerful than their
predecessors. | astro-ph_IM |
An in-depth exploration of LAMOST Unknown spectra based on density
clustering: LAMOST (Large Sky Area Multi-Object Fiber Spectroscopic Telescope) has
completed the observation of nearly 20 million celestial objects, including a
class of spectra labeled `Unknown'. Besides low signal-to-noise ratio, these
spectra often... | astro-ph_IM |
Expectation Maximization for Hard X-ray Count Modulation Profiles: This paper is concerned with the image reconstruction problem when the
measured data are solar hard X-ray modulation profiles obtained from the Reuven
Ramaty High Energy Solar Spectroscopic Imager (RHESSI)} instrument. Our goal is
to demonstrate that a ... | astro-ph_IM |
LUCI: A Python package for SITELLE spectral analysis: High-resolution optical integral field units (IFUs) are rapidly expanding our
knowledge of extragalactic emission nebulae in galaxies and galaxy clusters. By
studying the spectra of these objects -- which include classic HII regions,
supernova remnants, planetary ne... | astro-ph_IM |
Automatic Classification of Variable Stars in Catalogs with missing data: We present an automatic classification method for astronomical catalogs with
missing data. We use Bayesian networks, a probabilistic graphical model, that
allows us to perform inference to pre- dict missing values given observed data
and dependen... | astro-ph_IM |
Apodized Lyot Coronagraph for VLT-SPHERE: Laboratory tests and
performances of a first prototype in the visible: We present some of the High Dynamic Range Imaging activities developed around
the coronagraphic test-bench of the Laboratoire A. H. Fizeau (Nice). They
concern research and development of an Apodized Lyot ... | astro-ph_IM |
Automated Adaptive Optics: Large area surveys will dominate the forthcoming decades of astronomy and
their success requires characterizing thousands of discoveries through
additional observations at higher spatial or spectral resolution, and at
complementary cadences or periods. Only the full automation of adaptive opt... | astro-ph_IM |
CREDO project: The Cosmic-Ray Extremely Distributed Observatory (CREDO) is a project created
a few years ago in the Institute of Nuclear Physics PAS in Krak\'ow and
dedicated is to global studies of extremely extended cosmic-ray phenomena. The
main reason for creating such a project was that the cosmic-ray ensembles (C... | 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 |
Finding faint HI structure in and around galaxies: scraping the barrel: Soon to be operational HI survey instruments such as APERTIF and ASKAP will
produce large datasets. These surveys will provide information about the HI in
and around hundreds of galaxies with a typical signal-to-noise ratio of $\sim$
10 in the inne... | astro-ph_IM |
The NRL Program in X-ray Navigation: This chapter describes the development of X-ray Navigation at the Naval
Research Laboratory (NRL) within its astrophysics research programs. The
prospects for applications emerged from early discoveries of X-ray source
classes and their properties. Starting around 1988 some NRL X-ra... | astro-ph_IM |
The nature of the near-infrared interline sky background using fibre
Bragg grating OH suppression: We analyse the near-infrared interline sky background, OH and O2 emission in
19 hours of H band observations with the GNOSIS OH suppression unit and the
IRIS2 spectrograph at the 3.9-m AAT. We find that the temporal beh... | astro-ph_IM |
A Gaussian process cross-correlation approach to time delay estimation
in active galactic nuclei: We present a probabilistic cross-correlation approach to estimate time delays
in the context of reverberation mapping (RM) of Active Galactic Nuclei (AGN).
We reformulate the traditional interpolated cross-correlation me... | astro-ph_IM |
Near-UV Spectroscopy with the VLT: The 39-meter European Extremely Large Telescope (E-ELT) is expected to have
very low throughput in the blue part of the visible spectrum. Because of that,
a blue-optimised spectrograph at the 8-meter Very Large Telescope could
potentially be competitive against the E-ELT at wavelength... | astro-ph_IM |
Sub-kilometre scale ionospheric studies at the SKA-Low site, using MWA
extended baselines: The ambitious scientific goals of SKA require a matching capability for
calibration of instrumental and atmospheric propagation contributions as
functions of time, frequency and position. The development of novel calibration
al... | astro-ph_IM |
Direct Imaging in the Habitable Zone and the Problem of Orbital Motion: High contrast imaging searches for exoplanets have been conducted on 2.4-10 m
telescopes, typically at H band (1.6 microns) and used exposure times of ~1 hr
to search for planets with semi-major axes of > ~10 AU. We are beginning to
plan for survey... | astro-ph_IM |
Neutrino direction and energy resolution of Askaryan detectors: Detection of high-energy neutrinos via the radio technique allows for an
exploration of the neutrino energy range from $\sim10^{16}$\~eV to
$\sim10^{20}$\~eV with unprecedented precision. These Askaryan detectors have
matured in two pilot arrays (ARA and A... | astro-ph_IM |
Radon backgrounds in the DEAP-1 liquid-argon-based Dark Matter detector: The DEAP-1 \SI{7}{kg} single phase liquid argon scintillation detector was
operated underground at SNOLAB in order to test the techniques and measure the
backgrounds inherent to single phase detection, in support of the
\mbox{DEAP-3600} Dark Matte... | astro-ph_IM |
AtmoHEAD 2013 workshop / Atmospheric Monitoring for High-Energy
Astroparticle Detectors: A 3-day international workshop on atmospheric monitoring and calibration for
high-energy astroparticle detectors, with a view towards next-generation
facilities. The atmosphere is an integral component of many high-energy
astropa... | astro-ph_IM |
Dark Ages Radio Explorer Mission: Probing the Cosmic Dawn: The period between the creation of the cosmic microwave background at a
redshift of ~1000 and the formation of the first stars and black holes that
re-ionize the intergalactic medium at redshifts of 10-20 is currently
unobservable. The baryonic component of the... | astro-ph_IM |
A method to develop mission critical data processing systems for
satellite based instruments. The spinning mode case: Modern satellite based experiments are often very complex real-time systems,
composed by flight and ground segments, that have challenging resource related
constraints, in terms of size, weight, power... | astro-ph_IM |
Bayesian modelling of scattered light in the LIGO interferometers: Excess noise from scattered light poses a persistent challenge in the
analysis of data from gravitational wave detectors such as LIGO. We integrate a
physically motivated model for the behavior of these "glitches" into a standard
Bayesian analysis pipel... | astro-ph_IM |
Trigonometric Extension of the Geometric Correction Factor: Prototype
for adding precision to adaptive ray tracing in ENZO: In this paper, we describe a method designed to add precision to radiation
simulations in the adaptive mesh refinement cosmological hydrodynamics code
ENZO. We build upon the geometric correctio... | astro-ph_IM |
An Analysis of DES Cluster Simulations through the IMCAT and Shapelets
Weak Lensing Pipelines: We have run two completely independent weak lensing analysis pipelines on a
set of realistic simulated images of a massive galaxy cluster with a singular
isothermal sphere profile (galaxy velocity dispersion sigma_v=1250 km... | astro-ph_IM |
Noise statistics in a fast digital radio receiver: the Bedlam backend
for the Parkes Radio Telescope: The digital record of the voltage in a radio telescope receiver, after
frequency conversion and sampling at a finite rate, is not a perfect
representation of the original analog signal. To detect and characterise a
t... | astro-ph_IM |
A 50 mK test bench for demonstration of the readout chain of
Athena/X-IFU: The X-IFU (X-ray Integral Field Unit) onboard the large ESA mission Athena
(Advanced Telescope for High ENergy Astrophysics), planned to be launched in
the mid 2030s, will be a cryogenic X-ray imaging spectrometer operating at 55
mK. It will p... | astro-ph_IM |
An update to the EVEREST K2 pipeline: Short cadence, saturated stars,
and Kepler-like photometry down to Kp = 15: We present an update to the EVEREST K2 pipeline that addresses various
limitations in the previous version and improves the photometric precision of
the de-trended light curves. We develop a fast regulari... | astro-ph_IM |
Characterization of a multi-etalon array for ultra-high resolution
spectroscopy: The upcoming Extremely Large Telescopes (ELTs) are expected to have the
collecting area required to detect potential biosignature gases in the
atmosphere of rocky planets around nearby low-mass stars. Some efforts are
currently focusing ... | astro-ph_IM |
Optimal detuning for quantum filter cavities: Vacuum quantum fluctuations impose a fundamental limit on the sensitivity of
gravitational-wave interferometers, which rank among the most sensitive
precision measurement devices ever built. The injection of conventional
squeezed vacuum reduces quantum noise in one quadratu... | astro-ph_IM |
The Power Board of the KM3NeT Digital Optical Module: design, upgrade,
and production: The KM3NeT Collaboration is building an underwater neutrino observatory at
the bottom of the Mediterranean Sea consisting of two neutrino telescopes, both
composed of a three-dimensional array of light detectors, known as digital
o... | astro-ph_IM |
Reduction of CCD observations made with a scanning Fabry--Perot
interferometer. III. Wavelength scale refinement: We describe the recent modifications to the data reduction technique for
observations acquired with the scanning Fabry-Perot interferometer (FPI)
mounted on the 6-m telescope of the Special Astrophysical ... | astro-ph_IM |
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