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200 papers

A large sample of known and likely gamma-ray blazars has been monitored twice per week since late 2007 at 15 GHz with the Owens Valley Radio Observatory (OVRO) 40-meter Telescope. The sample contains about 1700 sources, including the…

High Energy Astrophysical Phenomena · Physics 2012-05-03 W. Max-Moerbeck , J. L. Richards , V. Pavlidou , T. Hovatta , O. G. King , T. J. Pearson , A. C. S. Readhead , R. Reeves , M. C. Shepherd

Using the 1.4 GHz Australia Telescope Large Area Survey (ATLAS), supplemented with the 1.4 GHz Very Large Array images, we undertook a search for bent-tailed (BT) radio galaxies in the Chandra Deep Field-South (CDFS). Here we present a…

Astrophysics of Galaxies · Physics 2015-06-19 Siamak Dehghan , Melanie Johnston-Hollitt , Thomas M. O. Franzen , Ray P. Norris , Neal A. Miller

The unique morphology of head-tail (HT) radio galaxies suggests that radio jets and their intra-cluster medium interact strongly. We conducted a systematic search for HT radio galaxies using the LOFAR Two-metre Sky Survey first data release…

Astrophysics of Galaxies · Physics 2023-03-08 Sabyasachi Pal , Shobha Kumari

The 100,000 spectra from the 2 degree Field Galaxy Redshift Survey (2dFGRS) in the 100k Public Data Release represent the largest single compilation of galaxy spectra available. By virtue of its sheer size and the properties of the…

Astrophysics · Physics 2009-11-07 Darren S. Madgwick , Paul C. Hewett , Daniel J. Mortlock , Ofer Lahav

We measure the angular clustering of ~2000 radio sources in The Bootes Deep Field, covering 5.3 deg^2 down to S(1.4 GHz)=0.2 mJy. With reference to work by Blake & Wall, we show that the size distribution of multi-component radio galaxies…

Astrophysics · Physics 2009-11-07 R. J. Wilman , H. J. A. Rottgering , R. A. Overzier , M. J. Jarvis

We present a new sample of 30 nearby (z<0.2) BL Lacs, selected to study the nuclear as well as the large scale properties of low power radio sources. In this first paper, we show and discuss new radio data taken with the VLA (19 objects at…

Astrophysics · Physics 2009-11-10 M. Giroletti , G. Giovannini , G. B. Taylor , R. Falomo

We are entering a new era of sensitive, large-area and multi-frequency radio surveys that will allow us to identify Gigahertz-Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) radio sources over a wide range in radio luminosity and…

Astrophysics of Galaxies · Physics 2016-03-16 Elaine M. Sadler

We have compiled a sample of 234 ultra-steep-spectrum (USS) selected radio sources in order to find high-redshift radio galaxies. The sample covers the declination range -40deg < DEC < -30deg in the overlap region between the 1400-MHz NRAO…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-13 J. J. Bryant , J. W. Broderick , H. M. Johnston , R. W. Hunstead , B. M. Gaensler , C. De Breuck

Radio-bright, jetted quasars at $z>5$ serve as unique laboratories for studying supermassive black hole activity in the early Universe. In this work, we present a sample of high-$z$ jetted quasars selected from the combination of the radio…

We present the public release of the low-frequency atlas of continuous gravitational waves, covering signals with frequencies from 20 Hz to 200 Hz and frequency derivatives from -5e-11 to 5e-11 Hz/s. Compared to the previous atlas releases,…

General Relativity and Quantum Cosmology · Physics 2025-09-04 Vladimir Dergachev , Maria Alessandra Papa

We have carried out multi-colour imaging of the fields of a statistically complete sample of low-frequency selected radio loud quasars at 0.6<z<1.1, in order to determine the characteristics of their environments. The largest radio sources…

Astrophysics · Physics 2007-05-23 J. M. Barr , M. N. Bremer , J. C. Baker , M. D. Lehnert

With the advent of new generation low-frequency telescopes, such as the LOw Frequency ARray (LOFAR), and improved calibration techniques, we have now started to unveil the sub GHz radio sky with unprecedented depth and sensitivity. The…

We present results of optical identifications for Very Large Array Sky Survey (VLASS) radio sources using the Ultraviolet Near Infrared Optical Northern Survey (UNIONS). A cross-match between UNIONS and VLASS Epoch 2 catalogs yields 146,212…

Upcoming radio telescopes will allow to study the radio sky at low frequencies with unprecedent sensitivity and resolution. New surveys are expected to discover a large number of new radio sources. Here we investigate the abundance of radio…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 S. E. Nuza , M. Hoeft , R. J. van Weeren , S. Gottloeber , G. Yepes

We present a new catalogue of low-mass X-ray binaries (LMXBs) in the Galaxy. The catalogue contains source names, coordinates, source types, fluxes, distances, system parameters, and other characteristic properties of 349 LMXBs, including…

High Energy Astrophysical Phenomena · Physics 2023-07-28 A. Avakyan , M. Neumann , A. Zainab , V. Doroshenko , J. Wilms , A. Santangelo

We present the catalogue of Radio sources associated with Optical Galaxies and having Unresolved or Extended morphologies I (ROGUE I). It was generated by cross-matching galaxies from the Sloan Digital Sky Survey Data Release 7 (SDSS DR 7)…

Astrophysics of Galaxies · Physics 2021-07-14 Natalia Żywucka , Dorota Kozieł-Wierzbowska , Arti Goyal

Aims. The orientation-based unification scheme of radio-loud active galactic nuclei (AGNs) asserts that radio galaxies and quasars are essentially the same type of object, but viewed from different angles. To test this unification model, we…

Astrophysics of Galaxies · Physics 2025-03-04 Tong Pan , Yuming Fu , H. J. A. Rottgering , R. J. van Weeren , A. B. Drake , B. H. Yue , J. W. Petley

The HI Parkes All-Sky Survey (HIPASS) Catalogue forms the largest uniform catalogue of HI sources compiled to date, with 4,315 sources identified purely by their HI content. The catalogue data comprise the southern region declination <+2…

Announcing the final release, v8, of the Milliquas (Million Quasars) quasar catalogue which presents all published quasars to 30 June 2023, including quasars from the first releases of the Dark Energy Spectroscopic Instrument (DESI) and the…

Astrophysics of Galaxies · Physics 2024-01-25 Eric Wim Flesch