Design and expected performance of a novel hybrid detector for...
Current detectors for Very-High-Energy $\gamma$-ray astrophysics are either pointing instruments with a small field of view (Cherenkov telescopes), or large field-of-view instruments with relatively...
View ArticleObserving—and Imaging—Active Galactic Nuclei with the Event Horizon Telescope
Originally developed to image the shadow region of the central black hole in Sagittarius A* and in the nearby galaxy M87, the Event Horizon Telescope (EHT) provides deep, very high angular resolution...
View ArticleRates, Flux Densities, and Spectral Indices of Meteor Radio Afterglows
Using the narrowband all-sky imager mode of the LWA1 we have now detected 30 transients at 25.6 MHz, 1 at 34 MHz, and 93 at 38.0 MHz. While we have only optically confirmed that 37 of these events are...
View ArticleBayesian isochrone fitting and stellar ages
Stellar evolution theory has been extraordinarily successful at explaining the different phases under which stars form, evolve and die. While the strongest constraints have traditionally come from...
View ArticlePLC-controlled cryostats for the BlackGEM and MeerLICHT detectors
BlackGEM (BG) is an array of telescopes, currently under development at the Radboud University Nijmegen and at NOVA. It targets the detection of the optical counterparts of gravitational waves. The...
View ArticleTwo-layer anti-reflection coating with mullite and polyimide foam for...
We have developed a novel two-layer anti-reflection (AR) coating method for large-diameter infrared (IR) filters made of alumina, for the use at cryogenic temperatures in millimeter wave measurements....
View ArticleComprehensive All-sky Search for Periodic Gravitational Waves in the Sixth...
We report on a comprehensive all-sky search for periodic gravitational waves in the frequency band 100-1500 Hz and with a frequency time derivative in the range of $[-1.18, +1.00]\times 10^{-8}$ Hz/s....
View ArticleSystematic Uncertainties in the Spectroscopic Measurements of Neutron-Star...
Many techniques for measuring neutron star radii rely on absolute flux measurements in the X-rays. As a result, one of the fundamental uncertainties in these spectroscopic measurements arises from the...
View ArticleNull-stream pointing with pulsar timing arrays
Locating sources on the sky is one of the largest challenges in gravitational wave astronomy, owing to the omni-directional nature of gravitational wave detection techniques, and the often...
View ArticleDevelopment of dual-polarization LEKIDs for CMB observations
We discuss the design considerations and initial measurements from arrays of dual-polarization, lumped element kinetic inductance detectors (LEKIDs) nominally designed for cosmic microwave background...
View ArticleUnresolved versus resolved: testing the validity of young simple stellar...
CONTEXT. Stellar populations are the building blocks of galaxies including the Milky Way. The majority, if not all extragalactic studies are entangled with the use of stellar population models given...
View ArticleAn innovative silicon photomultiplier digitizing camera for gamma-ray astronomy
The single-mirror small-size telescope (SST-1M) is one of the three proposed designs for the small-size telescopes (SSTs) of the Cherenkov Telescope Array (CTA) project. The SST-1M will be equipped...
View ArticleModal noise characterisation of a hybrid reformatter [Cross-Listing]
This paper reports on the modal noise characterisation of a hybrid reformatter. The device consists of a multicore-fibre photonic lantern and an ultrafast laser-inscribed slit reformatter. It operates...
View ArticleA general formalism for Fourier based Wave Front Sensing: application to the...
In this article, we compare a set of Wave Front Sensors (WFS) based on Fourier filtering technique. In particular, this study explores the "class of pyramidal WFS" defined as the 4 faces pyramid WFS,...
View ArticleSimulation study of the correlation ($X_{max}^{\mu}$, $N^{\mu}$) in view of...
In this paper we study, using Monte Carlo simulations, the possibility to discriminate the mass of the Ultra High Energy Cosmic Rays (UHECRs) by combining information obtained from the maximum...
View ArticleA fast algorithm for identifying Friends-of-Friends halos
We describe a simple and fast algorithm for identifying friends-of-friends clusters and prove its correctness. The algorithm avoids unnecessary expensive neighbor queries, uses minimal memory overhead,...
View ArticleThe clustering of galaxies in the completed SDSS-III Baryon Oscillation...
We investigate the cosmological implications of studying galaxy clustering using a tomographic approach applied to the final BOSS DR12 galaxy sample, including both auto- and cross-correlation...
View ArticleNull-stream pointing with pulsar timing arrays [Cross-Listing]
Locating sources on the sky is one of the largest challenges in gravitational wave astronomy, owing to the omni-directional nature of gravitational wave detection techniques, and the often...
View ArticleUnresolved versus resolved: testing the validity of young simple stellar...
CONTEXT. Stellar populations are the building blocks of galaxies including the Milky Way. The majority, if not all extragalactic studies are entangled with the use of stellar population models given...
View ArticleHigh Resolution Linear Polarimetric Imaging for the Event Horizon Telescope...
Images of the linear polarization of synchrotron radiation around Active Galactic Nuclei (AGN) identify their projected magnetic field lines and provide key data for understanding the physics of...
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