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CYBERSKA
A Cyberinfrastructure platform to meet the needs of data intensive radio astronomy on route to the SKA |
Latest comments
Russ Taylor on SkyQuery: An Implementation of a Parallel Probabilistic Join Engine for Cross-Identification of Multiple Astronomical Databases (2614 days ago): Very interesting..- Samuel George on Faraday synthesis: The synergy of aperture and rotation measure synthesis (2802 days ago): Ah yes, pardon my stupid comment! :-) I had meant to say POSSUM when I wrote...
- Kevin Douglas on Faraday synthesis: The synergy of aperture and rotation measure synthesis (2802 days ago): Sam, pardon my ignorance (still learning this polarisation stuff) but how would...
- Samuel George on Faraday synthesis: The synergy of aperture and rotation measure synthesis (2802 days ago): This looks very promising. I tried to get hold of their implementation...
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arxiv, sdss, mnras, agn, ska, instrumentation and methods for astrophysics, a&a, astronomy, galaxies, hi, polarization, radio, extragalactic astrophysics, cosmology, rfi, gpu, methods, iskaf2010 science meeting, data, xray, galfa, frii, ism, fits, open source, nvss, lwa, archive, workshop, calibration, imaging, effelsberg, ebhis, ir, vla, galaxy, clean, apj, galaxy astrophysics, maser, 21cm, instrumentation, simulations, databases, data analysis, new astronomy, high energy astrophysical phenomena, parallel, the dynamic ism: a celebration of the canadian galactic plane survey, fri
All site bookmarks
The extinction law from photometric data: linear regression methods
By Samuel George 2705 days agoarxiv.org - Context. The properties of dust grains, in particular their size distribution, are expected to differ from the interstellar medium to the high-density regions within molecular clouds. Since the extinction at near-infrared wavelengths is caused by...The magnetized medium around the radio galaxy B2 0755+37: an interaction with the intra-group gas
By Samuel George 2709 days agoarxiv.org - We explore the magneto-ionic environment of the isolated radio galaxy B2 0755+37 using detailed imaging of the distributions of Faraday rotation and depolarization over the radio source from Very Large Array observations at 1385,1465 and 4860 MHz...Post-correlation filtering techniques for off-axis source and RFI removal
By Samuel George 2710 days agoonlinelibrary.wiley.com - Techniques to improve the data quality of interferometric radio observations are considered. Fundaments of fringe frequencies in the uv-plane are discussed and filters are used to attenuate radio-frequency interference (RFI) and off-axis sources....The interaction between feedback from active galactic nuclei and supernovae
By Samuel George 2711 days agoarxiv.org - Energetic feedback from supernovae (SNe) and from active galactic nuclei (AGN) are both important processes that are thought to control how much gas is able to condense into galaxies and form stars. We show that although both AGN and SNe suppress...Gas, Stars and Star Formation in ALFALFA Dwarf Galaxies
By Samuel George 2715 days agoarxiv.org - We examine the global properties of the stellar and HI components of 229 low HI mass dwarf galaxies extracted from the ALFALFA survey, including a complete sample of 176 galaxies with HI masses < 10^{7.7} M_sun and HI line widths < 80 km...On the reliability of polarization estimation using Rotation Measure Synthesis
By Samuel George 2717 days agoarxiv.org - We benchmark the reliability of the Rotation Measure (RM) synthesis algorithm using the 1005 Centaurus A field sources of Feain et al. (2009). The RM synthesis solutions are compared with estimates of the polarization parameters using traditional...Feature Detection in Radio Astronomy using the Circle Hough Transform
By Samuel George 2718 days agowww.publish.csiro.au - While automatic detection of point sources in astronomical images has experienced a great degree of success, less effort has been directed towards the detection of extended and low-surface-brightness features. At present, existing telescopes...Over-resolution of compact sources in interferometric observations
By Samuel George 2719 days agoarxiv.org - We review the effects of source size in interferometric observations and focus on the cases of very compact sources. If a source is extremely compact and/or weak (so it is not possible to detect signature of source structure in the visibilities) we...GALAPAGOS: From Pixels to Parameters
By Samuel George 2722 days agoarxiv.org - To automate source detection, two-dimensional light-profile Sersic modelling and catalogue compilation in large survey applications, we introduce a new code GALAPAGOS, Galaxy Analysis over Large Areas: Parameter Assessment by GALFITting Objects from...On the Calibration of Full-polarization 86GHz Global VLBI Observations
By Samuel George 2723 days agoarxiv.org - We report the development of a semi-automatic pipeline for the calibration of 86 GHz full-polarization observations performed with the Global Millimeter-VLBI array (GMVA) and describe the calibration strategy followed in the data reduction. Our...
