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Related papers: An Analysis of the VLASS Proposal

200 papers

Radio observations of strongly lensed objects are valuable as cosmological probes. Lensed radio sources have proven difficult to identify in large part due to the limited depth and angular resolution of the previous generation of radio sky…

Astrophysics of Galaxies · Physics 2025-01-07 Michael N. Martinez , Yjan A. Gordon , Keith Bechtol , Gillian Cartwright , Peter S. Ferguson , Miranda Gorsuch

Modern radio telescopes are routinely reaching depths where normal starforming galaxies are the dominant observed population. Realising the potential of radio as a tracer of star formation and black hole activity over cosmic time involves…

Astrophysics of Galaxies · Physics 2020-07-01 I. Heywood , C. L. Hale , M. J. Jarvis , S. Makhathini , J. A. Peters , M. L. L. Sebokolodi , O. M. Smirnov

The Northern Sky Variability Survey (NSVS) is a temporal record of the sky over the optical magnitude range from 8 to 15.5. It was conducted in the course of the first generation Robotic Optical Transient Search Experiment (ROTSE-I) using a…

L-BASS is an instrument designed to produce an absolutely calibrated map of the sky at a wavelength of 21 cm (L-band) with a radiometric accuracy of less than or equal to 0.1 K and with an angular resolution of 23 degrees. The prime…

Instrumentation and Methods for Astrophysics · Physics 2025-06-06 D. P. Zerafa , P. N. Wilkinson , C. J. Radcliffe , J. P. Leahy , I. W. A. Browne , P. J. Black

This whitepaper describes how the VLASS could be designed in a manner to allow the identification of candidate dual active galactic nuclei (AGN) at separations <7 kpc. Dual AGN represent a clear marker of two supermassive black holes within…

Cosmology and Nongalactic Astrophysics · Physics 2014-02-05 Sarah Burke-Spolaor , Adam Brazier , Shami Chatterjee , Julia Comerford , James Cordes , T. Joseph W. Lazio , Xin Liu , Yue Shen

The VLA Galactic Plane Survey (VGPS) consists of measurements of the 21cm HI line and 1420 MHz continuum at 1' angular resolution over much of the first quadrant of Galactic longitude within a few degrees of the Galactic plane. In…

Astrophysics · Physics 2007-05-23 Felix J. Lockman , Jeroen M. Stil

We report on a novel search for radio gravitational lenses. Using the Very Large Array, we imaged ten candidates with both dual redshifts in Sloan Digital Sky Survey spectra and 1.4 GHz radio flux >2 mJy in the FIRST survey. The VLA maps…

A VLA Sky Survey of the extragalactic sky at S band (2-4 GHz) with polarization information can uniquely probe the magneto-ionic medium in a wide range of astrophysical environments over cosmic time. For a shallow all-sky survey, we expect…

We are using the VLBA at 8 GHz to observe a sample of 834 nearby 2MASS galaxies that are stronger than 100 mJy in the NVSS. The goals of the project are to detect (1) supermassive black holes significantly offset from the IR positions of…

Cosmology and Nongalactic Astrophysics · Physics 2011-10-31 Jim Condon , Jeremy Darling , Yuri Y. Kovalev , Leonid Petrov

The Molonglo Observatory Synthesis Telescope, operating at 843 MHz with a 5 square degree field of view, is carrying out a radio imaging survey of the sky south of declination -30 deg. This survey (the Sydney University Molonglo Sky Survey,…

Astrophysics · Physics 2008-11-26 D. C. -J. Bock , M. I. Large , Elaine M. Sadler

At a distance of 8 kpc, the center of our Galaxy is the nearest galactic nucleus, and has been the subject of numerous key projects undertaken by great observatories such as Chandra, Spitzer, and Herschel. However, there are still no…

The C-Band All-Sky Survey (C-BASS) is an all-sky full-polarization survey at a frequency of 5 GHz, designed to provide data complementary to the all-sky surveys of WMAP and Planck and future CMB B-mode polarization imaging surveys. We…

Instrumentation and Methods for Astrophysics · Physics 2019-02-22 M. A. Stevenson , T. J. Pearson , Michael E. Jones , C. J. Copley , C. Dickinson , J. J. John , O. G. King , S. J. C. Muchovej , Angela C. Taylor

The "Wide Area VISTA Extra-galactic Survey" (WAVES) is a 4MOST Consortium Design Reference Survey which will use the VISTA/4MOST facility to spectroscopically survey ~2million galaxies to $r_{\rm AB} < 22$ mag. WAVES consists of two…

Cosmology and Nongalactic Astrophysics · Physics 2016-06-29 Simon P. Driver , Luke J. Davies , Martin Meyer , Chris Power , Aaron S. G. Robotham , Ivan K. Baldry , Jochen Liske , Peder Norberg

Technical description of the new project called All Sky Automated Survey and results of the tests of our prototype instrument are presented. The ultimate goal of this project is photometric monitoring of the large area of the sky with fully…

Astrophysics · Physics 2007-05-23 G. Pojmanski

L-BASS is an instrument designed to make radiometric temperature measurements of the sky with an absolute accuracy of better than 0.1 K at 1.4 GHz. This will be achieved in two steps: first by measuring the sky temperature relative to that…

Instrumentation and Methods for Astrophysics · Physics 2025-06-30 D. P. Zerafa , P. N. Wilkinson , C. J. Radcliffe , J. P. Leahy , I. W. A. Browne , P. J. Black

I first review the status of Digital Sky Surveys. The focus will be on extragalactic surveys with an area of more than 100 sq.deg. The Sloan Digital Sky Survey is the archetype of such imaging surveys and it is its great success that has…

Astrophysics of Galaxies · Physics 2016-06-29 T. Shanks

As a service to the community, we have compiled radio frequency spectra from the literature for all sources within the VLA Low Frequency Sky Survey (VLSS) that are brighter than 15 Jy at 74 MHz. Over 160 references were used to maximize the…

Astrophysics · Physics 2009-11-13 J. F. Helmboldt , N. E. Kassim , A. S. Cohen , W. M. Lane , T. J. Lazio

A new two-image gravitational lens system has been discovered as a result of the Cosmic Lens All-Sky Survey (CLASS). Radio observations with the VLA, MERLIN and the VLBA at increasingly higher resolutions all show two components with a flux…