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A deep survey of the European Large Area ISO Survey (ELAIS) field in the southern celestial hemisphere (hereinafter S1) has been carried out with the Australia Telescope Compact Array (ATCA) at 1.4 GHz. The S1 region, covering about 4…

We present high sensitivity, low radio frequency continuum observations of the ELAIS-N1 field with 32 hours of observations of the uGMRT Band-2 ($120-250$ MHz) covering $5.86\,\text{deg}^2$ area, achieving a central off-source RMS noise of…

This is the first of a series of papers based on sensitive 610 MHz observations of the ELAIS N1 field using the Giant Metrewave Radio Telescope. We describe the observations, processing and source catalogue extraction from a deep image with…

Astrophysics of Galaxies · Physics 2019-11-06 E. F. Ocran , A. R. Taylor , M. Vaccari , C. H. Ishwara-Chandra , I. Prandoni

We report the spectral index of diffuse radio emission between 50 and 100 MHz from data collected with two implementations of the Experiment to Detect the Global EoR Signature (EDGES) low-band system. EDGES employs a wide beam…

Instrumentation and Methods for Astrophysics · Physics 2019-01-08 Thomas J. Mozdzen , Nivedita Mahesh , Raul A. Monsalve , Alan E. E. Rogers , Judd D. Bowman

We report absolutely calibrated measurements of diffuse radio emission between 90 and 190 MHz from the Experiment to Detect the Global EoR Signature (EDGES). EDGES employs a wide beam zenith-pointing dipole antenna centred on a declination…

Instrumentation and Methods for Astrophysics · Physics 2016-10-25 Thomas. J. Mozdzen , Judd. D. Bowman , Raul. A. Monsalve , Alan. E. E. Rogers

We present observations of the European Large-Area {\it ISO} Survey-North 1 (ELAIS-N1) at 325 MHz using the Giant Metrewave Radio Telescope (GMRT), with the ultimate objective of identifying active galactic nuclei and starburst galaxies and…

Astrophysics · Physics 2009-11-13 S. K. Sirothia , M . Dennefeld , D. J. Saikia , H. Dole , F. Ricquebourg , J. Roland

As a pilot study for the first all-sky radio survey at short wavelengths, we have observed 1216 sq. deg. of the southern sky at 18GHz (16mm) using a novel wide-band (3.4GHz bandwidth) analogue correlator on one baseline of the Australia…

We conduct a stacking analysis using 1.4 GHz NRAO VLA Sky Survey (NVSS) detections and Planck all-sky maps to estimate the differential source counts down to the few 100 $\mu$Jy level at 30, 44, 70 and 100 GHz. Consequently, we are able to…

Astrophysics of Galaxies · Physics 2018-07-11 Eric J. Murphy , Ranga-Ram Chary

Context. The Australia Telescope Large Area Survey (ATLAS) aims to image a 7 deg2 region centred on the European Large Area ISO Survey - South 1 (ELAIS-S1) field and the Chandra Deep Field South (CDF-S) at 1.4 GHz with high sensitivity (up…

Cosmology and Nongalactic Astrophysics · Physics 2015-12-30 Peter-Christian Zinn , Enno Middelberg , Ray P. Norris , Christopher A. Hales , Minnie Y. Mao , Kate E. Randall

We have conducted sensitive (1 sigma<30 uJy) 1.4 GHz radio observations with the Australia Telescope Compact Array of a field largely coincident with infrared observations of the Spitzer Wide-Area Extragalactic Survey. The field is centred…

Understanding the low-frequency radio sky in depth is necessary to subtract foregrounds in order to detect the redshifted 21 cm signal of neutral hydrogen from the Cosmic Dawn, Epoch of Reionization (EoR) and post-reionization era. In this…

This study aims to characterise the polarized foreground emission in the ELAIS-N1 field and to address its possible implications for the extraction of the cosmological 21-cm signal from the Low-Frequency Array - Epoch of Reionization…

Astrophysics of Galaxies · Physics 2014-09-05 V. Jelic , A. G. de Bruyn , M. Mevius , F. B. Abdalla , K. M. B. Asad , G. Bernardi , M. A. Brentjens , S. Bus , E. Chapman , B. Ciardi , S. Daiboo , E. R. Fernandez , A. Ghosh , G. Harker , H. Jensen , S. Kazemi , L. V. E. Koopmans , P. Labropoulos , O. Martinez-Rubi , G. Mellema , A. R. Offringa , V. N. Pandey , A. H. Patil , R. M. Thomas , H. K. Vedantham , V. Veligatla , S. Yatawatta , S. Zaroubi , A. Alexov , J. Anderson , I. M. Avruch , R. Beck , M. E. Bell , M. J. Bentum , P. Best , A. Bonafede , J. Bregman , F. Breitling , J. Broderick , W. N. Brouw , M. Bruggen , H. R. Butcher , J. E. Conway , F. de Gasperin , E. de Geus , A. Deller , R. -J. Dettmar , S. Duscha , J. Eisloffel , D. Engels , H. Falcke , R. A. Fallows , R. Fender , C. Ferrari , W. Frieswijk , M. A. Garrett , J. Griessmeier , A. W. Gunst , J. P. Hamaker , T. E. Hassall , M. Haverkorn , G. Heald , J. W. T. Hessels , M. Hoeft , J. Horandel , A. Horneffer , A. van der Horst , M. Iacobelli , E. Juette , A. Karastergiou , V. I. Kondratiev , M. Kramer , M. Kuniyoshi , G. Kuper , J. van Leeuwen , P. Maat , G. Mann , D. McKay-Bukowski , J. P. McKean , H. Munk , A. Nelles , M. J. Norden , H. Paas , M. Pandey-Pommier , G. Pietka , R. Pizzo , A. G. Polatidis , W. Reich , H. Rottgering , A. Rowlinson , A. M. M. Scaife , D. Schwarz , M. Serylak , O. Smirnov , M. Steinmetz , A. Stewart , M. Tagger , Y. Tang , C. Tasse , S. ter Veen , S. Thoudam , C. Toribio , R. Vermeulen , C. Vocks , R. J. van Weeren , R. A. M. J. Wijers , S. J. Wijnholds , O. Wucknitz , P. Zarka

Radio emission has been detected in a broad variety of stellar objects from all stages of stellar evolution. However, most of our knowledge originates from targeted observations of small samples, which are strongly biased to sources which…

Solar and Stellar Astrophysics · Physics 2015-10-07 G. Umana , C. Trigilio , T. M. O. Franzen , R. P. Norris , P. Leto , A. Ingallinera , C. S. Buemi , C. Agliozzo , F. Cavallaro , L. Cerrigone

We present the third data release from the Australia Telescope Large Area Survey (ATLAS). These data combine the observations at 1.4 GHz before and after upgrades to the Australia Telescope Compact Array reaching a sensitivity of 14…

In this paper we present a wide-area 610 MHz survey of the ELAIS\,N1 field with the GMRT, covering an area of 12.8 deg$^2$ at a resolution of 6 arcsec and with an rms noise of $\sim 40$ $\mu$Jy beam$^{-1}$. This is equivalent to $\sim 20$…

Astrophysics of Galaxies · Physics 2020-08-19 C. H. Ishwara-Chandra , A. R. Taylor , D. A. Green , J. M. Stil , M. Vaccari , E. F. Ocran

In this first paper of the series, we present initial results of newly upgraded Giant Meterwave Radio Telescope (uGMRT) observation of European Large-Area ISO Survey-North 1 (ELAIS-N1) at 325 MHz with 32 MHz bandwidth. Precise measurement…

We present a three epoch survey for transient and variables in the extended Chandra Deep Field South at 5.5 GHz with the Australia Telescope Compact Array. A region covering $\sim$0.3 deg$^{2}$ was observed on timescales of 2.5 months and…

Astrophysics of Galaxies · Physics 2015-06-17 M. E. Bell , M. T. Huynh , P. Hancock , Tara Murphy , B. M. Gaensler , D. Burlon , C. Trott , K. Bannister

Aims: Contamination from bright diffuse Galactic thermal and non-thermal radio emission poses crucial challenges in experiments aiming to measure the 21-cm signal of neutral hydrogen from the Cosmic Dawn and Epoch of Reionization. If not…

Instrumentation and Methods for Astrophysics · Physics 2022-06-29 B. K. Gehlot , L. V. E. Koopmans , A. R. Offringa , H. Gan , R. Ghara , S. K. Giri , M. Kuiack , F. G. Mertens , M. Mevius , R. Mondal , V. N. Pandey , A. Shulevski , R. A. M. J. Wijers , S. Yatawatta

Understanding diffuse Galactic radio emission is interesting both in its own right and for minimizing foreground contamination of cosmological measurements. Cosmic Microwave Background experiments have focused on frequencies > 10 GHz,…

We present results from simulations of the extragalactic polarized sky at 1.4 GHz. As the basis for our polarization models, we use a semi-empirical simulation of the extragalactic total intensity (Stokes I) continuum sky developed at the…

Cosmology and Nongalactic Astrophysics · Physics 2009-02-13 S. P. O'Sullivan , J. M. Stil , A. R. Taylor , R. Ricci , J. K. Grant , K. Shorten
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