5,182 results for sources

arxiv.org/abs/astro-ph/0212418v1

HI Absorption in GPS/CSS Sources

Combining our own observations with data from the literature, we consider the incidence of HI absorption in Gigahertz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) sources. Here we present our preliminary results, where we find that the sm...

arxiv.org/abs/2111.06141v1

The relationship between FR0 radio galaxies and GPS sources

We present the results of our study of the relationship between FR0 radio galaxies and GPS sources. Quasi-simultaneous radio spectra of 34 FR0s were obtained at 2.25-22.3 GHz with the radio telescope RATAN-600 in 2020-2021 during 2-6 epochs. Most FR0...

arxiv.org/abs/astro-ph/0306288v1

X-ray emission from GPS/CSS sources

The high spatial resolution of the Chandra X-ray Observatory allows us to study the environment of GPS/CSS sources to within an arcsec of the strong compact core. We present the discovery of X-ray jets in two GPS quasars, PKS1127-145 and B2 0738+39...

arxiv.org/abs/0901.4592v1

High Frequency GPS sources in the AT20G Survey

The Australia Telescope 20GHz (AT20G) survey was used to select a complete sample of 656 Gigahertz Peaked Spectrum (GPS) sources with spectral turnovers above 5GHz. The AT20G has near simultaneous observations at 4.8, 8.6 and 20GHz, which makes it...

arxiv.org/abs/1109.5866v1

Obscuring Supersoft X-ray Sources in Stellar Winds

We investigate the possibility of obscuring supersoft X-ray sources in the winds of companion stars. We derive limits on the amount of circumstellar material needed to fully obscure a 'canonical' supersoft X-ray source in the Large Magellanic Cloud,...

arxiv.org/abs/2003.06797v1

On new data sources for the production of official statistics

In the past years we have witnessed the rise of new data sources for the potential production of official statistics, which, by and large, can be classified as survey, administrative, and digital data. Apart from the differences in their generation a...

arxiv.org/abs/2008.03962v1

Grandma: a network to coordinate them all

GRANDMA is an international project that coordinates telescope observations of transient sources with large localization uncertainties. Such sources include gravitational wave events, gamma-ray bursts and neutrino events. GRANDMA currently coordinate...

arxiv.org/abs/0807.4470v1

New triple systems in the RasTyc sample of stellar X-ray sources

During the study of a large set of late-type stellar X-ray sources, we discovered a large fraction of multiple systems. In this paper we investigate the orbital elements and kinematic properties of three new spectroscopic triple systems as well as...

arxiv.org/abs/2302.12907v1

Linking Streets in OpenStreetMap to Persons in Wikidata

Geographic web sources such as OpenStreetMap (OSM) and knowledge graphs such as Wikidata are often unconnected. An example connection that can be established between these sources are links between streets in OSM to the persons in Wikidata they were...

arxiv.org/abs/astro-ph/9707022v1

The Improved Resolution and Image Separation (IRIS) Satellite

Natural (such as lunar) occultations have long been used to study sources on small angular scales, while coronographs have been used to study high contrast sources. We propose launching the Improved Resolution and Image Selection (IRIS) Satellite,...

arxiv.org/abs/1206.6916v1

Overview on spectral line source finding and visualisation

Here I will outline successes and challenges for finding spectral line sources in large data cubes that are dominated by noise. This is a 3D challenge as the sources we wish to catalog are spread over several spatial pixels and spectral channels. Whi...