G. Kokotanekov

VizieR Online Data Catalog: LOFAR Two-metre Sky Survey DR1 source catalog (Shimwell+, 2019)

T. W. Shimwell, Cyril Tasse, M. J. Hardcastle, A. P. Mechev et autres

The LOFAR Two-metre Sky Survey - II. First data release

T. W. Shimwell, Cyril Tasse, M. J. Hardcastle, A. P. Mechev et autres

The LOFAR Two-metre Sky Survey (LoTSS) is an ongoing sensitive, high-resolution 120-168MHz survey of the entire northern sky for which observations are now 20% complete. We present our first full-quality public data release. For this data release 424 square degrees, or 2% …

VizieR Online Data Catalog: Abell 1795 GMRT and Chandra maps (Kokotanekov+, 2018)

G. Kokotanekov, Michael W. Wise, Martijn de Vries, Huib T. Intema

The LOFAR Two-metre Sky Survey

T. W. Shimwell, Cyril Tasse, M. J. Hardcastle, A. P. Mechev et autres

The LOFAR Two-metre Sky Survey (LoTSS) is an ongoing sensitive, high-resolution 120–168 MHz survey of the entire northern sky for which observations are now 20% complete. We present our first full-quality public data release. For this data release 424 square degrees, or …

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Signatures of multiple episodes of AGN activity in the core of Abell 1795

G. Kokotanekov, Michael W. Wise, Martijn de Vries, Huib T. Intema

In this paper we analyze AGN activity signatures in the rich nearby galaxy cluster Abell 1795 aiming to confirm and characterize the long-term feedback history in the system. We combine radio observations at 610 and 235 MHz from the Giant Metrewave Radio …

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Joint radio and X-ray analysis of powerful feedback systems

G. Kokotanekov

Galaxy clusters are the most massive bound objects in the universe. Roughly 90% of the baryons in clusters reside in the hot plasma of the intracluster medium (ICM), while the rest form stars in galaxies. Active galactic nuclei (AGN) that appear in …

LOFAR MSSS: The scaling relation between AGN cavity power and radio luminosity at low radio frequencies

G. Kokotanekov, Michael W. Wise, George H. Heald, J. P. McKean et autres

We present a new analysis of the widely used relation between cavity power and radio luminosity in clusters of galaxies with evidence for strong AGN feedback. We studied the correlation at low radio frequencies using two new surveys – the first alternative …

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LOFAR MSSS: Discovery of a 2.56 Mpc giant radio galaxy associated with a disturbed galaxy group

A. O. Clarke, George H. Heald, T. H. Jarrett, Justin D. Bray et autres

We report on the discovery in the LOFAR Multifrequency Snapshot Sky Survey (MSSS) of a giant radio galaxy (GRG) with a projected size of 2.56 ± 0.07 Mpc projected on the sky. It is associated with the galaxy triplet UGC 9555, within …

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LOFAR MSSS: detection of a low-frequency radio transient in 400 h of monitoring of the North Celestial Pole

Adam J. Stewart, Rob P. Fender, J. W. Broderick, T. E. Hassall et autres

We present the results of a four-month campaign searching for low-frequency radio transients near the North Celestial Pole with the Low-Frequency Array (LOFAR), as part of the Multifrequency Snapshot Sky Survey (MSSS). The data were recorded between 2011 December and 2012 April …

The LOFAR Multifrequency Snapshot Sky Survey (MSSS) I. Survey description and first results

George H. Heald, R. Pizzo, Emanuela Orrú, R. P. Breton et autres

We present the Multifrequency Snapshot Sky Survey (MSSS), the first northern-sky LOFAR imaging survey. In this introductory paper, we first describe in detail the motivation and design of the survey. Compared to previous radio surveys, MSSS is exceptional due to its intrinsic …

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The LOFAR Multifrequency Snapshot Sky Survey (MSSS)

George H. Heald, R. Pizzo, Emanuela Orrú, R. P. Breton et autres

We present the Multifrequency Snapshot Sky Survey (MSSS), the first northern-sky Low Frequency Array (LOFAR) imaging survey. In this introductory paper, we first describe in detail the motivation and design of the survey. Compared to previous radio surveys, MSSS is exceptional due …

nl, gb, fr, pl, de, au, us, nz, Afrique du Sud, se (code pays fourni par la source)