Zobrazeno 1 - 10
of 351
pro vyhledávání: '"Pietka M"'
Autor:
McKean, J. P., Godfrey, L. E. H., Vegetti, S., Wise, M. W., Morganti, R., Hardcastle, M. J., Rafferty, D., Anderson, J., Avruch, I. M., Beck, R., Bell, M. E., van Bemmel, I., Bentum, M. J., Bernardi, G., Best, P., Blaauw, R., Bonafede, A., Breitling, F., Broderick, J. W., Bruggen, M., Cerrigone, L., Ciardi, B., de Gasperin, F., Deller, A., Duscha, S., Engels, D., Falcke, H., Fallows, R. A., Frieswijk, W., Garrett, M. A., Griessmeier, J. M., van Haarlem, M. P., Heald, G., Hoeft, M., van der Horst, A. J., Iacobelli, M., Intema, H., Juette, E., Karastergiou, A., Kondratiev, V. I., Koopmans, L. V. E., Kuniyoshi, M., Kuper, G., van Leeuwen, J., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., Mulcahy, D. D., Munk, H., Nelles, A., Orru, E., Paas, H., Pandey-Pommier, M., Pietka, M., Pizzo, R., Polatidis, A. G., Reich, W., Rottgering, H. J. A., Rowlinson, A., Scaife, A. M. M., Serylak, M., Shulevski, A., Sluman, J., Smirnov, O., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Thoudam, S., Toribio, M. C., Vermeulen, R., Vocks, C., van Weeren, R. J., Wucknitz, O., Yatawatta, S., Zarka, P.
Publikováno v:
MNRAS, 463, 3143 (2016)
The low-frequency radio spectra of the hotspots within powerful radio galaxies can provide valuable information about the physical processes operating at the site of the jet termination. These processes are responsible for the dissipation of jet kine
Externí odkaz:
http://arxiv.org/abs/2103.16961
Autor:
Broderick, J. W., Shimwell, T. W., Gourdji, K., Rowlinson, A., Nissanke, S., Hotokezaka, K., Jonker, P. G., Tasse, C., Hardcastle, M. J., Oonk, J. B. R., Fender, R. P., Wijers, R. A. M. J., Shulevski, A., Stewart, A. J., ter Veen, S., Moss, V. A., van der Wiel, M. H. D., Nichols, D. A., Piette, A., Bell, M. E., Carbone, D., Corbel, S., Eislöffel, J., Grießmeier, J. -M., Keane, E. F., Law, C. J., Muñoz-Darias, T., Pietka, M., Serylak, M., van der Horst, A. J., van Leeuwen, J., Wijnands, R., Zarka, P., Anderson, J. M., Bentum, M. J., Blaauw, R., Brouw, W. N., Brüggen, M., Ciardi, B., de Vos, M., Duscha, S., Fallows, R. A., Franzen, T. M. O., Garrett, M. A., Gunst, A. W., Hoeft, M., Hörandel, J. R., Iacobelli, M., Jütte, E., Koopmans, L. V. E., Krankowski, A., Maat, P., Mann, G., Mulder, H., Nelles, A., Paas, H., Pandey-Pommier, M., Pekal, R., Reich, W., Röttgering, H. J. A., Schwarz, D. J., Smirnov, O., Soida, M., Toribio, M. C., van Haarlem, M. P., van Weeren, R. J., Vocks, C., Wucknitz, O., Zucca, P.
We present low-radio-frequency follow-up observations of AT 2017gfo, the electromagnetic counterpart of GW170817, which was the first binary neutron star merger to be detected by Advanced LIGO-Virgo. These data, with a central frequency of 144 MHz, w
Externí odkaz:
http://arxiv.org/abs/2004.01726
Autor:
Sooknunan, K., Lochner, M., Bassett, Bruce A., Peiris, H. V., Fender, R., Stewart, A. J., Pietka, M., Woudt, P. A., McEwen, J. D., Lahav, O.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 502, Issue 1, March 2021, Pages 206-224
With the advent of powerful telescopes such as the Square Kilometer Array and the Vera C. Rubin Observatory, we are entering an era of multiwavelength transient astronomy that will lead to a dramatic increase in data volume. Machine learning techniqu
Externí odkaz:
http://arxiv.org/abs/1811.08446
We investigate the relation between the radio (F_r) and optical (F_o) flux densities of a variety of classes of radio transients and variables, with the aim of analysing whether this information can be used, in the future, to classify such events. Us
Externí odkaz:
http://arxiv.org/abs/1806.09815
Autor:
Cendes, Y., Prasad, P., Rowlinson, A., Wijers, R. A. M. J., Swinbank, J. D., Law, C. J., van der Horst, A. J., Carbone, D., Broderick, J. W., Staley, T. D., Stewart, A. J., Huizinga, F., Molenaar, G., Alexov, A., Bell, M. E., Coenen, T., Corbel, S., Eislöffel, J., Fender, R., Grießmeier, J. -M., Jonker, P., Kramer, M., Kuniyoshi, M., Pietka, M., Stappers, B., Wise, M., Zarka, P.
With their wide fields of view and often relatively long coverage of any position in the sky in imaging survey mode, modern radio telescopes provide a data stream that is naturally suited to searching for rare transients. However, Radio Frequency Int
Externí odkaz:
http://arxiv.org/abs/1804.04708
Autor:
Broderick, J. W., Fender, R. P., Miller-Jones, J. C. A., Trushkin, S. A., Stewart, A. J., Anderson, G. E., Staley, T. D., Blundell, K. M., Pietka, M., Markoff, S., Rowlinson, A., Swinbank, J. D., van der Horst, A. J., Bell, M. E., Breton, R. P., Carbone, D., Corbel, S., Eislöffel, J., Falcke, H., Grießmeier, J. -M., Hessels, J. W. T., Kondratiev, V. I., Law, C. J., Molenaar, G. J., Serylak, M., Stappers, B. W., van Leeuwen, J., Wijers, R. A. M. J., Wijnands, R., Wise, M. W., Zarka, P.
We present LOFAR high-band data over the frequency range 115-189 MHz for the X-ray binary SS 433, obtained in an observing campaign from 2013 February - 2014 May. Our results include a deep, wide-field map, allowing a detailed view of the surrounding
Externí odkaz:
http://arxiv.org/abs/1802.03406
We have shown previously that a broad correlation between the peak radio luminosity and the variability time-scales, approximately L ~ t^5, exists for variable synchrotron emitting sources and that different classes of astrophysical source occupy dif
Externí odkaz:
http://arxiv.org/abs/1707.04265
Autor:
Clarke, A. O., Heald, G., Jarrett, T., Bray, J. D., Hardcastle, M. J., Cantwell, T. M., Scaife, A. M. M., Brienza, M., Bonafede, A., Breton, R. P., Broderick, J. W., Carbone, D., Croston, J. H., Farnes, J. S., Harwood, J. J., Heesen, V., Horneffer, A., van der Horst, A. J., Iacobelli, M., Jurusik, W., Kokotanekov, G., McKean, J. P., Morabito, L. K., Mulcahy, D. D., Nikiel-Wroczynski, B. S., Orru, E., Paladino, R., Pandey-Pommier, M., Pietka, M., Pizzo, R., Pratley, L., Riseley, C. J., Rottgering, H. J. A., Rowlinson, A., Sabater, J., Sendlinger, K., Shulevski, A., Sridhar, S. S., Stewart, A. J., Tasse, C., van Velzen, S., van Weeren, R. J., Wise, M. W.
Publikováno v:
A&A 601, A25 (2017)
We report on the discovery in the LOFAR Multifrequency Snapshot Sky Survey (MSSS) of a giant radio galaxy (GRG) with a projected size of $2.56 \pm 0.07$ Mpc projected on the sky. It is associated with the galaxy triplet UGC 9555, within which one is
Externí odkaz:
http://arxiv.org/abs/1702.01571
Low-radio-frequency eclipses of the redback pulsar J2215+5135 observed in the image plane with LOFAR
Autor:
Broderick, J. W., Fender, R. P., Breton, R. P., Stewart, A. J., Rowlinson, A., Swinbank, J. D., Hessels, J. W. T., Staley, T. D., van der Horst, A. J., Bell, M. E., Carbone, D., Cendes, Y., Corbel, S., Eislöffel, J., Falcke, H., Grießmeier, J. -M., Hassall, T. E., Jonker, P., Kramer, M., Kuniyoshi, M., Law, C. J., Markoff, S., Molenaar, G. J., Pietka, M., Scheers, L. H. A., Serylak, M., Stappers, B. W., ter Veen, S., van Leeuwen, J., Wijers, R. A. M. J., Wijnands, R., Wise, M. W., Zarka, P.
The eclipses of certain types of binary millisecond pulsars (i.e. `black widows' and `redbacks') are often studied using high-time-resolution, `beamformed' radio observations. However, they may also be detected in images generated from interferometri
Externí odkaz:
http://arxiv.org/abs/1604.05722
Autor:
Buitink, S., Corstanje, A., Falcke, H., Hörandel, J. R., Huege, T., Nelles, A., Rachen, J. P., Rossetto, L., Schellart, P ., Scholten, O., ter Veen, S., Thoudam, S., Trinh, T. N. G., Anderson, J., Asgekar, A., Avruch, I. M., Bell, M. E., Bentum, M. J., Bernardi, G., Best, P., Bonafede, A., Breitling, F., Broderick, J. W., Brouw, W. N., Brüggen, M., Butcher, H. R., Carbone, D., Ciardi, B., Conway, J. E., de Gasperin, F., de Geus, E., Deller, A., Dettmar, R. -J., van Diepen, G., Duscha, S., Eislöffel, J., Engels, D., Enriquez, J. E., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Griessmeier, J. M., Gunst, A. W., van Haarlem, M. P., Hassall, T. E., Heald, G., Hessels, J. W. T., Hoeft, M., Horneffer, A., Iacobelli, M., Intema, H., Juette, E., Karastergiou, A., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Kuper, G., van Leeuwen, J., Loose, G. M., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., McKean, J. P., Mevius, M., Mulcahy, D. D., Munk, H., Norden, M. J., Orru, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pietka, M., Pizzo, R., Polatidis, A. G., Reich, W., Röttgering, H. J. A., Scaife, A. M. M., Schwarz, D. J., Serylak, M., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tang, Y., Tasse, C., Toribio, M. C., Vermeulen, R., Vocks, C., Vogt, C., van Weeren, R. J., Wijers, R. A. M. J., Wijnholds, S. J., Wise, M. W., Wucknitz, O., Yatawatta, S., Zarka, P., Zensus, J. A.
Publikováno v:
Nature 531, 70 (2016)
Cosmic rays are the highest energy particles found in nature. Measurements of the mass composition of cosmic rays between 10^{17} eV and 10^{18} eV are essential to understand whether this energy range is dominated by Galactic or extragalactic source
Externí odkaz:
http://arxiv.org/abs/1603.01594