Frequency Interpolation of LOFAR Embedded Element Patterns Using Spherical Wave Expansion

Autor: M. J. Arts, D. S. Prinsloo, M. J. Bentum, A. B. Smolders

Publikováno v: International Journal of Antennas and Propagation, Vol 2021 (2021)

This paper describes the use of spherical wave expansion (SWE) to model the embedded element patterns of the LOFAR low-band array. The goal is to reduce the amount of data needed to store the embedded element patterns. The coefficients are calculated

Externí odkaz: https://doaj.org/article/c2d95a431ba44761ba05b6432cb084b0

Low-frequency radio absorption in Cassiopeia A

Autor: M. Arias, J. Vink, F. de Gasperin, P. Salas, J. B. R. Oonk, R. J. van Weeren, A. S. van Amesfoort, J. Anderson, R. Beck, M. E. Bell, M. J. Bentum, P. Best, R. Blaauw, F. Breitling, J. W. Broderick, W. N. Brouw, M. Brüggen, H. R. Butcher, B. Ciardi, E. de Geus, A. Deller, P. C. G. van Dijk, S. Duscha, J. Eislöffel, M. A. Garrett, J. M. Grießmeier, A. W. Gunst, M. P. van Haarlem, G. Heald, J. Hessels, J. Hörandel, H. A. Holties, A. J. van der Horst, M. Iacobelli, E. Juette, A. Krankowski, J. van Leeuwen, G. Mann, D. McKay-Bukowski, J. P. McKean, H. Mulder, A. Nelles, E. Orru, H. Paas, M. Pandey-Pommier, V. N. Pandey, R. Pekal, R. Pizzo, A. G. Polatidis, W. Reich, H. J. A. Röttgering, H. Rothkaehl, D. J. Schwarz, O. Smirnov, M. Soida, M. Steinmetz, M. Tagger, S. Thoudam, M. C. Toribio, C. Vocks, M. H. D. van der Wiel, R. A. M. J. Wijers, O. Wucknitz, P. Zarka, P. Zucca

Publikováno v: Arias, M, Vink, J, de Gasperin, F, Salas, P, Oonk, J B R, van Weeren, R J, van Amesfoort, A S, Anderson, J, Beck, R, Bell, M E, Bentum, M J, Best, P, Blaauw, R, Breitling, F, Broderick, J W, Brouw, W N, Brüggen, M, Butcher, H R, Ciardi, B, de Geus, E, Deller, A, van Dijk, P C G, Duscha, S, Eislöffel, J, Garrett, M A, Grießmeier, J M, Gunst, A W, van Haarlem, M P, Heald, G, Hessels, J, Hörandel, J, Holties, H A, van der Horst, A J, Iacobelli, M, Juette, E, Krankowski, A, van Leeuwen, J, Mann, G, McKay-Bukowski, D, McKean, J P, Mulder, H, Nelles, A, Orru, E, Paas, H, Pandey-Pommier, M, Pandey, V N, Pekal, R, Pizzo, R, Polatidis, A G, Reich, W, Rottgering, H J A, Rothkaehl, H, Schwarz, D J, Smirnov, O, Soida, M, Steinmetz, M, Tagger, M, Thoudam, S, Toribio, M C, Vocks, C, van der Wiel, M H D, Wijers, R A M J, Wucknitz, O, Zarka, P & Zucca, P 2018, ' Low-frequency radio absorption in Cassiopeia A ', Astronomy & Astrophysics, vol. 612 . https://doi.org/10.1051/0004-6361/201732411
Astronomy & Astrophysics, 612:A110. EDP Sciences
Astron.Astrophys.
Astron.Astrophys., 2018, 612, pp.A110. ⟨10.1051/0004-6361/201732411⟩
Astronomy and Astrophysics
Astronomy & astrophysics, 612:A110. EDP Sciences
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2018, 612, pp.A110. ⟨10.1051/0004-6361/201732411⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2018, 612, pp.A110. ⟨10.1051/0004-6361/201732411⟩
Astronomy & Astrophysics, 612, pp. 1-16
Astronomy and Astrophysics, 612:A110. EDP Sciences
Astronomy & Astrophysics, 612, A110
Astron.Astrophys., 2018, 612, pp.A110. 〈10.1051/0004-6361/201732411〉
Astronomy & Astrophysics, 612, 1-16

Cassiopeia A is one of the best-studied supernova remnants. Its shocked ejecta emits brightly in radio and X-rays. Its unshocked ejecta can be studied through infrared emission, the radio-active decay of $^{44}$Ti, and low frequency free-free absorpt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b850ddd4c34aeeae043efdc28adde0a
https://hdl.handle.net/20.500.11820/e06ab1b3-9c6f-4aad-a2b0-3201519d4b20

Calibrating high-precision Faraday rotation measurements for LOFAR and the next generation of low-frequency radio telescopes (Corrigendum)

Autor: C. Sotomayor-Beltran, C. Sobey, J. W. T. Hessels, G. de Bruyn, A. Noutsos, A. Alexov, J. Anderson, A. Asgekar, I. M. Avruch, R. Beck, M. E. Bell, M. R. Bell, M. J. Bentum, G. Bernardi, P. Best, L. Birzan, A. Bonafede, F. Breitling, J. Broderick, W. N. Brouw, M. Brüggen, B. Ciardi, F. de Gasperin, R.-J. Dettmar, A. van Duin, S. Duscha, J. Eislöffel, H. Falcke, R. A. Fallows, R. Fender, C. Ferrari, W. Frieswijk, M. A. Garrett, J. Grießmeier, T. Grit, A. W. Gunst, T. E. Hassall, G. Heald, M. Hoeft, A. Horneffer, M. Iacobelli, E. Juette, A. Karastergiou, E. Keane, J. Kohler, M. Kramer, V. I. Kondratiev, L. V. E. Koopmans, M. Kuniyoshi, G. Kuper, J. van Leeuwen, P. Maat, G. Macario, S. Markoff, J. P. McKean, D. D. Mulcahy, H. Munk, E. Orru, H. Paas, M. Pandey-Pommier, M. Pilia, R. Pizzo, A. G. Polatidis, W. Reich, H. Röttgering, M. Serylak, J. Sluman, B. W. Stappers, M. Tagger, Y. Tang, C. Tasse, S. ter Veen, R. Vermeulen, R. J. van Weeren, R. A. M. J. Wijers, S. J. Wijnholds, M. W. Wise, O. Wucknitz, S. Yatawatta, P. Zarka

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2015, 581 (A58), 13 p. ⟨10.1051/0004-6361/201220728e⟩
Astronomy & Astrophysics, 581, September, pp. C4(1)-C4(2)
Astronomy & Astrophysics, 581, C4(1)-C4(2)
Astronomy and Astrophysics-A&A, EDP Sciences, 2015, 581 (A58), 13 p. ⟨10.1051/0004-6361/201220728e⟩
Astronomy and Astrophysics

International audience; Faraday rotation measurements using the current and next generation of low-frequency radio telescopes will provide a powerful probe of astronomical magnetic fields. However, achieving the full potential of these measurements r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7c64aea8756be71791103181a28cb2e
https://insu.hal.science/insu-01370009

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

Autor: G. H. Heald, R. F. Pizzo, E. Orrú, R. P. Breton, D. Carbone, C. Ferrari, M. J. Hardcastle, W. Jurusik, G. Macario, D. Mulcahy, D. Rafferty, A. Asgekar, M. Brentjens, R. A. Fallows, W. Frieswijk, M. C. Toribio, B. Adebahr, M. Arts, M. R. Bell, A. Bonafede, J. Bray, J. Broderick, T. Cantwell, P. Carroll, Y. Cendes, A. O. Clarke, J. Croston, S. Daiboo, F. de Gasperin, J. Gregson, J. Harwood, T. Hassall, V. Heesen, A. Horneffer, A. J. van der Horst, M. Iacobelli, V. Jelić, D. Jones, D. Kant, G. Kokotanekov, P. Martin, J. P. McKean, L. K. Morabito, B. Nikiel-Wroczyński, A. Offringa, V. N. Pandey, M. Pandey-Pommier, M. Pietka, L. Pratley, C. Riseley, A. Rowlinson, J. Sabater, A. M. M. Scaife, L. H. A. Scheers, K. Sendlinger, A. Shulevski, M. Sipior, C. Sobey, A. J. Stewart, A. Stroe, J. Swinbank, C. Tasse, J. Trüstedt, E. Varenius, S. van Velzen, N. Vilchez, R. J. van Weeren, S. Wijnholds, W. L. Williams, A. G. de Bruyn, R. Nijboer, M. Wise, A. Alexov, J. Anderson, I. M. Avruch, R. Beck, M. E. Bell, I. van Bemmel, M. J. Bentum, G. Bernardi, P. Best, F. Breitling, W. N. Brouw, M. Brüggen, H. R. Butcher, B. Ciardi, J. E. Conway, E. de Geus, A. de Jong, M. de Vos, A. Deller, R.-J. Dettmar, S. Duscha, J. Eislöffel, D. Engels, H. Falcke, R. Fender, M. A. Garrett, J. Grießmeier, A. W. Gunst, J. P. Hamaker, J. W. T. Hessels, M. Hoeft, J. Hörandel, H. A. Holties, H. Intema, N. J. Jackson, E. Jütte, A. Karastergiou, W. F. A. Klijn, V. I. Kondratiev, L. V. E. Koopmans, M. Kuniyoshi, G. Kuper, C. Law, J. van Leeuwen, M. Loose, P. Maat, S. Markoff, R. McFadden, D. McKay-Bukowski, M. Mevius, J. C. A. Miller-Jones, R. Morganti, H. Munk, A. Nelles, J. E. Noordam, M. J. Norden, H. Paas, A. G. Polatidis, W. Reich, A. Renting, H. Röttgering, A. Schoenmakers, D. Schwarz, J. Sluman, O. Smirnov, B. W. Stappers, M. Steinmetz, M. Tagger, Y. Tang, S. ter Veen, S. Thoudam, R. Vermeulen, C. Vocks, C. Vogt, R. A. M. J. Wijers, O. Wucknitz, S. Yatawatta, P. Zarka

Publikováno v: Astronomy & Astrophysics, 582, A123
Astronomy & Astrophysics, 582:A123. EDP Sciences
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2015, 582, pp.A123. ⟨10.1051/0004-6361/201425210⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2015, 582, pp.A123. ⟨10.1051/0004-6361/201425210⟩
NASA Astrophysics Data System
Astronomy and astrophysics, 582:A123. EDP Sciences
Heald, G H, Pizzo, R F, Orrú, E, Breton, R, Carbone, D, Ferrari, C, Hardcastle, M J, Jurusik, W, Macario, G, Mulcahy, D, Rafferty, D, Asgekar, A, Brentjens, M, Fallows, R A, Frieswijk, W, Toribio, M C, Adebahr, B, Arts, M, Bell, M R, Bonafede, A, Bray, J, Broderick, J, Cantwell, T, Carroll, P, Cendes, Y, Clarke, A O, Croston, J, Daiboo, S, de Gasperin, F, Gregson, J, Harwood, J, Hassall, T, Heesen, V, Horneffer, A, van der Horst, A J, Iacobelli, M, Jelić, V, Jones, D, Kant, D, Kokotanekov, G, Martin, P, McKean, J P, Morabito, L K, Nikiel-Wroczyński, B, Offringa, A, Pandey, V N, Pandey-Pommier, M, Pietka, M, Pratley, L, Riseley, C, Rowlinson, A, Sabater, J, Scaife, A M M, Scheers, L H A, Sendlinger, K, Shulevski, A, Sipior, M, Sobey, C, Stewart, A J, Stroe, A, Swinbank, J, Tasse, C, Trüstedt, J, Varenius, E, van Velzen, S, Vilchez, N, van Weeren, R J, Wijnholds, S, Williams, W L, de Bruyn, A G, Nijboer, R, Wise, M, Alexov, A, Anderson, J, Avruch, I M, Beck, R, Bell, M E, van Bemmel, I, Bentum, M J, Bernardi, G, Best, P, Breitling, F, Brouw, W N, Brüggen, M, Butcher, H R, Ciardi, B, Conway, J E, de Geus, E, de Jong, A, de Vos, M, Deller, A, Dettmar, R-J, Duscha, S, Eislöffel, J, Engels, D, Falcke, H, Fender, R, Garrett, M, Grießmeier, J, Gunst, A W, Hamaker, J P, Hessels, J W T, Hoeft, M, Hörandel, J, Holties, H A, Intema, H, Jackson, N J, Jütte, E, Karastergiou, A, Klijn, W F A, Kondratiev, V I, Koopmans, L V E, Kuniyoshi, M, Kuper, G, Law, C, van Leeuwen, J, Loose, M, Maat, P, Markoff, S, McFadden, R, McKay-Bukowski, D, Mevius, M, Miller-Jones, J C A, Morganti, R, Munk, H, Nelles, A, Noordam, J E, Norden, M J, Paas, H, Polatidis, A G, Reich, W, Renting, A, Röttgering, H, Schoenmakers, A, Schwarz, D, Sluman, J, Smirnov, O, Stappers, B W, Steinmetz, M, Tagger, M, Tang, Y, ter Veen, S, Thoudam, S, Vermeulen, R, Vocks, C, Vogt, C, Wijers, R A M J, Wucknitz, O, Yatawatta, S & Zarka, P 2015, ' The LOFAR Multifrequency Snapshot Sky Survey (MSSS). I. Survey description and first results ', Astronomy & Astrophysics, vol. 582 . https://doi.org/10.1051/0004-6361/201425210
Astronomy & Astrophysics, 582, 1-22
Astronomy & Astrophysics, 582, October, pp. A123
Astronomy & astrophysics, 582(A123), 1-22. EDP Sciences

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 except

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6e191622caa2ec82b5f69b20d2e2cc7
http://hdl.handle.net/11585/667867

First LOFAR observations at very low frequencies of cluster-scale non-thermal emission: the case of Abell 2256

Autor: R. J. van Weeren, H. J. A. Röttgering, D. A. Rafferty, R. Pizzo, A. Bonafede, M. Brüggen, G. Brunetti, C. Ferrari, E. Orrù, G. Heald, J. P. McKean, C. Tasse, F. de Gasperin, L. Bîrzan, J. E. van Zwieten, S. van der Tol, A. Shulevski, N. Jackson, A. R. Offringa, J. Conway, H. T. Intema, T. E. Clarke, I. van Bemmel, G. K. Miley, G. J. White, M. Hoeft, R. Cassano, G. Macario, R. Morganti, M. W. Wise, C. Horellou, E. A. Valentijn, O. Wucknitz, K. Kuijken, T. A. Enßlin, J. Anderson, A. Asgekar, I. M. Avruch, R. Beck, M. E. Bell, M. R. Bell, M. J. Bentum, G. Bernardi, P. Best, A.-J. Boonstra, M. Brentjens, R. H. van de Brink, J. Broderick, W. N. Brouw, H. R. Butcher, W. van Cappellen, B. Ciardi, J. Eislöffel, H. Falcke, R. Fender, M. A. Garrett, M. Gerbers, A. Gunst, M. P. van Haarlem, J. P. Hamaker, T. Hassall, J. W. T. Hessels, L. V. E. Koopmans, G. Kuper, J. van Leeuwen, P. Maat, R. Millenaar, H. Munk, R. Nijboer, J. E. Noordam, V. N. Pandey, M. Pandey-Pommier, A. Polatidis, W. Reich, A. M. M. Scaife, A. Schoenmakers, J. Sluman, B. W. Stappers, M. Steinmetz, J. Swinbank, M. Tagger, Y. Tang, R. Vermeulen, M. de Vos

Publikováno v: Astronomy & astrophysics, 543:A43. EDP Sciences
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2012, 543, pp.A43. ⟨10.1051/0004-6361/201219154⟩
Astronomy and Astrophysics-A&A, 2012, 543, pp.A43. ⟨10.1051/0004-6361/201219154⟩
Astronomy & Astrophysics, 543, pp. A43
Astronomy & astrophysics, 543(A2256), 1-13. EDP Sciences
Astronomy & Astrophysics, 543, A43
Astronomy & Astrophysics, 543. EDP Sciences

Abell 2256 is one of the best known examples of a galaxy cluster hosting large-scale diffuse radio emission that is unrelated to individual galaxies. It contains both a giant radio halo and a relic, as well as a number of head-tail sources and smalle

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee7fd712ab9ff2b6b43751a0abf857df
https://doi.org/10.1051/0004-6361/201219154