A Response to Elvis’ 2015 Critique of the AURA Report "From Cosmic Birth to...
To ensure progress in astronomy over the coming decades, the key questions are "what facilities will we build, and when?" Toward this end, the Association of Universities for Research in Astronomy...
View ArticleA PSF-based approach to Kepler/K2 data. I. Variability within the K2 Campaign...
Kepler and K2 data analysis reported in the literature is mostly based on aperture photometry. Because of Kepler's large, undersampled pixels and the presence of nearby sources, aperture photometry is...
View ArticleThe Geneva Reduction and Analysis Pipeline for High-contrast Imaging of...
We present GRAPHIC, a new angular differential imaging (ADI) reduction pipeline where all geometric image operations are based on Fourier transforms. To achieve this goal the entire pipeline is...
View ArticleThe Power of Simultaneous Multi-Frequency Observations for mm-VLBI:...
Simultaneous observations at multiple frequency bands have the potential to overcome the fundamental limitation imposed by the atmospheric propagation in mm-VLBI observations. The propagation effects...
View ArticleDemonstration of high contrast with an obscured aperture with the WFIRST-AFTA...
The coronagraph instrument on the WFIRST-AFTA mission study has two coronagraphic architectures, shaped pupil and hybrid Lyot, which may be interchanged for use in different observing scenarios. Each...
View ArticleVolcanoes muon imaging using Cherenkov telescopes [Cross-Listing]
A detailed understanding of a volcano inner structure is one of the key-points for the volcanic hazards evaluation. To this aim, in the last decade, geophysical radiography techniques using cosmic muon...
View ArticleDesign study of an air-Cherenkov telescope for harsh environments with...
Telescopes, designed with semi-conductor based photo sensors, have the potential to detect Cherenkov or fluorescence light emitted by cosmic-rays in the atmosphere. Such telescopes promise a high duty...
View ArticleAstrometric observations of outer Jovian satellites with the `Saturn’...
The one-meter telescope-reflector `Saturn' (D=1 m, F = 4 m) was partially renovated at the Pulkovo observatory at the end of 2014. The telescope was equipped by CCD camera S2C with 14x14 arcmin field...
View ArticleRadio SETI Observations of the Anomalous Star KIC 8462852
We report on a search for the presence of signals from extraterrestrial intelligence in the direction of the star system KIC 8462852. Observations were made at radio frequencies between 1-10 GHz using...
View ArticleA Recount of Sunspot Groups on Staudach’s Drawings
We have examined the more than 1100 drawings of the solar disk made by the German astronomy amateur Johann Caspar Staudach during 1749-1799 and counted the spots on each image. Using the modern...
View ArticleHistorical Reflections on the Work of IAU Commission 4 (Ephemerides)
As part of a reorganization of the International Astronomical Union (IAU), Commission 4 (Ephemerides) went out of existence after the IAU General Assembly in August 2015. This paper presents brief...
View ArticleSDSS-IV/MaNGA: Spectrophotometric Calibration Technique
Mapping Nearby Galaxies at Apache Point Observatory (MaNGA), one of three core programs in the Sloan Digital Sky Survey-IV (SDSS-IV), is an integral-field spectroscopic (IFS) survey of roughly 10,000...
View ArticleMeasured Aperture-Array Noise Temperature of the Mark II Phased Array Feed...
We have measured the aperture-array noise temperature of the first Mk. II phased array feed that CSIRO has built for the Australian Square Kilometre Array Pathfinder telescope. As an aperture array,...
View ArticleApplication of the MST clustering to the high energy gamma-ray sky. I – New...
In this paper we show an application of the Minimum Spanning Tree (MST) clustering method to the high-energy gamma-ray sky observed at energies higher than 10 GeV in 6.3 years by the Fermi-Large Area...
View ArticleThe IceCube Neutrino Observatory, the Pierre Auger Observatory and the...
We have conducted three searches for correlations between ultra-high energy cosmic rays detected by the Telescope Array and the Pierre Auger Observatory, and high-energy neutrino candidate events from...
View ArticleActive compensation of aperture discontinuities for WFIRST-AFTA: analytical...
The new frontier in the quest for the highest contrast levels in the focal plane of a coronagraph is now the correction of the large diffractive artifacts effects introduced at the science camera by...
View ArticleQuasars can be used to verify the parallax zero-point of the Tycho-Gaia...
Context. The Gaia project will determine positions, proper motions, and parallaxes for more than one billion stars in our Galaxy. It is known that Gaia's two telescopes are affected by a small but...
View ArticleThe IceCube Neutrino Observatory, the Pierre Auger Observatory and the...
We have conducted three searches for correlations between ultra-high energy cosmic rays detected by the Telescope Array and the Pierre Auger Observatory, and high-energy neutrino candidate events from...
View ArticleActive compensation of aperture discontinuities for WFIRST-AFTA: analytical...
The new frontier in the quest for the highest contrast levels in the focal plane of a coronagraph is now the correction of the large diffractive artifacts effects introduced at the science camera by...
View ArticleA Generic and Efficient E-field Parallel Imaging Correlator for...
Modern radio telescopes are favouring densely packed array layouts with large numbers of antennas ($N_\textrm{a}\gtrsim 1000$). Since the complexity of traditional correlators scales as...
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