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CYBERSKA
A Cyberinfrastructure platform to meet the needs of data intensive radio astronomy on route to the SKA |
Results for "mnras"
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Radio sources with ultra-high polarisation
A sample of 129 unresolved radio sources with ultra-high linear polarisation (>30 per cent) has been selected from the NVSS (NRAO VLA Sky Survey). Such high average linear polarisation is unusual in extragalactic sources. Higher resolution ATCA (Australia Telescope Compact Array) and VLA (Very...Tags: mnras, arxiv, polarization, agn, nvss, sdss, vla, atca, galaxy, unresolved
4642 days ago
Analysing Astronomy Algorithms for GPUs and Beyond
Astronomy depends on ever increasing computing power. Processor clock-rates have plateaued, and increased performance is now appearing in the form of additional processor cores on a single chip. This poses significant challenges to the astronomy software community. Graphics Processing Units (GPUs...Tags: data structures and algorithms, arxiv, mnras, clean, gpu, graphics processing units
4642 days ago
The 6-GHz methanol multibeam maser catalogue II: Galactic longitudes 6 to 20
We present the second portion of an unbiased survey of the Galactic plane for 6668-MHz methanol masers. This section of the survey spans the longitude range 6 degrees to 20 degrees. We report the detection of 119 maser sources, of which 42 are new discoveries. The masers are tightly constrained t...Tags: galaxy astrophysics, mnras, arxiv, methanol, maser
4637 days ago
Galaxy Zoo 1 : Data Release of Morphological Classifications for nearly 900,000 galaxies
Morphology is a powerful indicator of a galaxy's dynamical and merger history. It is strongly correlated with many physical parameters, including mass, star formation history and the distribution of mass. The Galaxy Zoo project collected simple morphological classifications of nearly 900,000 gala...Tags: galaxy, identificiation, mnras, arxiv, morphology
4636 days ago
- Experiments designed to measure the redshifted 21~cm line from the Epoch of Reionization (EoR) are challenged by strong astrophysical foreground contamination, ionospheric distortions, complex instrumental response and other different types of noise (e.g. radio frequency interference). The astrop...
Tags: polarization, eor, simulations, galactic polarized foreground, 21-cm, reionization, mnras, arxiv
4631 days ago
PyMorph: Automated Galaxy Structural Parameter Estimation using Python
We present a new software pipeline -- PyMorph -- for automated estimation of structural parameters of galaxies. Both parametric fits through a two dimensional bulge disk decomposition as well as structural parameter measurements like concentration, asymmetry etc. are supported. The pipeline is de...Tags: python, galaxies, mnras, arxiv, extragalactic astrophysics, methods
4628 days ago
Multiwavelength Observations of Radio-quiet Quasars with Weak Emission Lines
We present radio and X-ray observations, as well as optical light curves, for a subset of 26 BL Lac candidates from the Sloan Digital Sky Survey (SDSS) lacking strong radio emission and with z<2.2. Half of these 26 objects are shown to be stars, galaxies, or absorbed quasars. We conclude that ...Tags: arxivs, mnras, agn, xray, sdss
4627 days ago
- Infrared (IR) luminosity is fundamental to understanding the cosmic star formation history and AGN evolution. The AKARI IR space telescope performed all sky survey in 6 IR bands (9, 18, 65, 90, 140, and 160um) with 3-10 times better sensitivity than IRAS, covering the crucial far-IR wavelengths a...
Tags: high energy astrophysical phenomena, mnras, arxiv, agn, ir, luminosity
4620 days ago
