Solvepol: a reduction pipeline for imaging polarimetry data
We present a newly pipeline to analyse polarimetric data: Solvepol. This pipeline is based on existing routines previously developed by our polarimetry group at Instituto de Astronom\'ia, Geof\'isica e...
View ArticleExoMol molecular line lists – XIII: The spectrum of CaO
An accurate line list for calcium oxide is presented covering transitions between all bound ro-vibronic levels from the five lowest electronic states \X, \Ap, \A, \astate, and \bstate. The ro-vibronic...
View ArticleThe Gaia reference frame amid quasar variability and proper motion patterns...
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...
View ArticleScintillation arcs in low-frequency observations of the timing-array...
Low-frequency observations of pulsars provide a powerful means for probing the microstructure in the turbulent interstellar medium (ISM). Here we report on high-resolution dynamic spectral analysis of...
View ArticleAnalytical Model for Ring Heater Thermal Compensation in Advanced LIGO
Advanced laser interferometer gravitational-wave detectors use high laser power to achieve design sensitivity. A small part of this power is absorbed in the interferometer cavity mirrors where it...
View Article42 Years of Continuous Observations of the Solar Diameter from 1974 to 2015
Several group in the World followed the solar diameter with dedicated instruments, namely solar astrolabes, since 1974. Their data have been gathered in several observing stations connected in the R2S3...
View ArticleOptical Intensity Interferometry through Atmospheric Turbulence
Conventional ground-based astronomical observations suffer from image distortion due to atmospheric turbulence. This can be minimized by choosing suitable geographic locations or adaptive optical...
View ArticleSummary of the 2015 IACHEC meeting
We summarize the outcome of the 10th meeting of the International Astronomical Consortium for High Energy Calibration (IACHEC), held in Beijing (People's Republic of China) in April 2015. Over 80...
View ArticleImaging an Event Horizon: Mitigation of Source Variability of Sagittarius A*
The black hole in the center of the Galaxy, associated with the compact source Sagittarius A* (Sgr A*), is predicted to cast a shadow upon the emission of the surrounding plasma flow, which encodes the...
View ArticleAbsorption spectrum of very low pressure atomic hydrogen
Spectra of quasars result primarily from interactions of natural light with atomic hydrogen. A visible absorption of a sharp and saturated spectral line in a gas requires a low pressure, so a long path...
View ArticleParallax of Galactic Cepheids from Spatially Scanning the Wide Field Camera 3...
We present a high-precision measurement of the parallax for the 12-day Cepheid SS Canis Majoris, obtained via spatial scanning with the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST)....
View ArticleThe GMRT High Resolution Southern Sky Survey for pulsars and transients -I....
We are conducting a survey for pulsars and transients using the Giant Metrewave Radio Telescope (GMRT). The GMRT High Resolution Southern Sky (GHRSS) survey is an off-Galactic-plane (|b|>5) survey...
View ArticleContribution of the electron-phonon interaction to Lindhard energy partition...
The influence of the transient thermal effects on the partition of the energy of selfrecoils in germanium and silicon into energy eventually given to electrons and to atomic recoils respectively is...
View ArticleParallax of Galactic Cepheids from Spatially Scanning the Wide Field Camera 3...
We present a high-precision measurement of the parallax for the 12-day Cepheid SS Canis Majoris, obtained via spatial scanning with the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST)....
View ArticleMolecular Bremsstrahlung Radiation at GHz Frequencies in Air
A detection technique for ultra-high energy cosmic rays, complementary to the fluorescence technique, would be the use of the molecular Bremsstrahlung radiation emitted by low-energy ionization...
View ArticleIVOA Simple Image Access
The Simple Image Access protocol (SIA) provides capabilities for the discovery, description, access, and retrieval of multi-dimensional image datasets, including 2-D images as well as datacubes of...
View ArticleRadio detection of high-energy cosmic rays with the Auger Engineering Radio...
The Auger Engineering Radio Array (AERA) is an enhancement of the Pierre Auger Observatory in Argentina. Covering about View the $17\,$km$^2$, AERA is the world-largest antenna array for cosmic-ray...
View ArticleA new neutrino source for the study of the solar neutrino physics in the...
Production of a neutrino source through proton induced reaction is studied by using the particle transport code, GEANT4. Unstable isotope such as $^{27}$Si can be produced when $^{27}$Al target is...
View ArticleDetecting Diffuse Sources in Astronomical Images
We present an algorithm capable of detecting diffuse, dim sources of any size in an astronomical image. These sources often defeat traditional methods for source finding, which expand regions around...
View ArticleThree Tools to Aid Visualisation of FITS Files for Astronomy
Increasingly there is a need to develop astronomical visualisation and manipulations tools which allow viewers to interact with displayed data directly, in real time and across a range of platforms. In...
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