Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Zagkouris, K."'
Autor:
Pilia, M., Hessels, J. W. T., Stappers, B. W., Kondratiev, V. I., Kramer, M., van Leeuwen, J., Weltevrede, P., Lyne, A. G., Zagkouris, K., Hassall, T. E., Bilous, A. V., Breton, R. P., Falcke, H., Grießmeier, J. -M., Keane, E., Karastergiou, A., Kuniyoshi, M., Noutsos, A., Osłowski, S., Serylak, M., Sobey, C., ter Veen, S., Alexov, A., Anderson, J., Asgekar, A., Avruch, I. M., Bell, M. E., Bentum, M. J., Bernardi, G., Bîrzan, L., Bonafede, A., Breitling, F., Broderick, J. W., Brüggen, M., Ciardi, B., Corbel, S., de Geus, E., de Jong, A., Deller, A., Duscha, S., Eislöffel, J., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Gunst, A. W., Hamaker, J. P., Heald, G., Horneffer, A., Jonker, P., Juette, E., Kuper, G., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., Miller-Jones, J. C. A., Nelles, A., Paas, H., Pandey-Pommier, M., Pietka, M., Pizzo, R., Polatidis, A. G., Reich, W., Röttgering, H., Rowlinson, A., Schwarz, D., Smirnov, O., Steinmetz, M., Stewart, A., Swinbank, J. D., Tagger, M., Tang, Y., Tasse, C., Thoudam, S., Toribio, M. C., van der Horst, A. J., Vermeulen, R., Vocks, C., van Weeren, R. J., Wijers, R. A. M. J., Wijnands, R., Wijnholds, S. J., Wucknitz, O., Zarka, P.
Publikováno v:
A&A 586, A92 (2016)
LOFAR offers the unique capability of observing pulsars across the 10-240 MHz frequency range with a fractional bandwidth of roughly 50%. This spectral range is well-suited for studying the frequency evolution of pulse profile morphology caused by bo
Externí odkaz:
http://arxiv.org/abs/1509.06396
Autor:
Noutsos, A., Sobey, C., Kondratiev, V. I., Weltevrede, P., Verbiest, J. P. W., Karastergiou, A., Kramer, M., Kuniyoshi, M., Alexov, A., Breton, R. P., Bilous, A. V., Cooper, S., Falcke, H., Grießmeier, J. -M., Hassall, T. E., Hessels, J. W. T., Keane, E. F., Osłowski, S., Pilia, M., Serylak, M., Stappers, B. W., ter Veen, S., van Leeuwen, J., Zagkouris, K., Anderson, K., Bähren, L., Bell, M., Broderick, J., Carbone, D., Cendes, Y., Coenen, T., Corbel, S., Eislöffel, J., Fender, R., Garsden, H., Jonker, P., Law, C., Marko, S., Masters, J., Miller-Jones, J., Molenaar, G., Osten, R., Pietka, M., Rol, E., Rowlinson, A., Scheers, B., Spreeuw, H., Staley, T., Stewart, A., Swinbank, J., Wijers, R., Wijnands, R., Wise, M., Zarka, P., van der Horst, A.
Publikováno v:
A&A 576, A62 (2015)
We present the highest-quality polarisation profiles to date of 16 non-recycled pulsars and four millisecond pulsars, observed below 200 MHz with the LOFAR high-band antennas. Based on the observed profiles, we perform an initial investigation of exp
Externí odkaz:
http://arxiv.org/abs/1501.03312
Autor:
Coenen, Thijs, van Leeuwen, Joeri, Hessels, Jason W. T., Stappers, Ben W., Kondratiev, Vladislav I., Alexov, A., Breton, R. P., Bilous, A., Cooper, S., Falcke, H., Fallows, R. A., Gajjar, V., Grießmeier, J. -M., Hassall, T. E., Karastergiou, A., Keane, E. F., Kramer, M., Kuniyoshi, M., Noutsos, A., Osłowski, S., Pilia, M., Serylak, M., Schrijvers, C., Sobey, C., ter Veen, S., Verbiest, J., Weltevrede, P., Wijnholds, S., Zagkouris, K., van Amesfoort, A. S., Anderson, J., Asgekar, A., Avruch, I. M., Bell, M. E., Bentum, M. J., Bernardi, G., Best, P., Bonafede, A., Breitling, F., Broderick, J., Brüggen, M., Butcher, H. R., Ciardi, B., Corstanje, A., Deller, A., Duscha, S., Eislöffel, J., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., de Gasperin, F., de Geus, E., Gunst, A. W., Hamaker, J. P., Heald, G., Hoeft, M., van der Horst, A., Juette, E., Kuper, G., Law, C., Mann, G., McFadden, R., McKay-Bukowski, D., McKean, J. P., Munk, H., Orru, E., Paas, H., Pandey-Pommier, M., Polatidis, A. G., Reich, W., Renting, A., Röttgering, H., Rowlinson, A., Scaife, A. M. M., Schwarz, D., Sluman, J., Smirnov, O., Swinbank, J., Tagger, M., Tang, Y., Tasse, C., Thoudam, S., Toribio, C., Vermeulen, R., Vocks, C., van Weeren, R. J., Wucknitz, O., Zarka, P., Zensus, A.
Publikováno v:
A&A 570, A60 (2014)
We have conducted two pilot surveys for radio pulsars and fast transients with the Low-Frequency Array (LOFAR) around 140 MHz and here report on the first low-frequency fast-radio burst limit and the discovery of two new pulsars. The first survey, th
Externí odkaz:
http://arxiv.org/abs/1408.0411
Autor:
Hassall, T. E., Stappers, B. W., Weltevrede, P., Hessels, J. W. T., Alexov, A., Coenen, T., Karastergiou, A., Kramer, M., Keane, E. F., Kondratiev, V. I., van Leeuwen, J., Noutsos, A., Pilia, M., Serylak, M., Sobey, C., Zagkouris, K., Fender, R., Bell, M. E., Broderick, J., Eisloffel, J., Falcke, H., Griessmeier, J. -M., Kuniyoshi, M., Miller-Jones, J. C. A., Wise, M. W., Wucknitz, O., Zarka, P., Asgekar, A., Batejat, F., Bentum, M. J., Bernardi, G., Best, P., Bonafede, A., Breitling, F., Bruggen, M., Butcher, H. R., Ciardi, B., de Gasperin, F., de Reijer, J. -P., Duscha, S., Fallows, R. A., Ferrari, C., Frieswijk, W., Garrett, M. A., Gunst, A. W., Heald, G., Hoeft, M., Juette, E., Maat, P., McKean, J. P., Norden, M. J., Pandey-Pommier, M., Pizzo, R., Polatidis, A. G., Reich, W., Rottgering, H., Sluman, J., Tang, Y., Tasse, C., Vermeulen, R., van Weeren, R. J., Wijnholds, S. J., Yatawatta, S.
Some radio pulsars show clear drifting subpulses, in which subpulses are seen to drift in pulse longitude in a systematic pattern. Here we examine how the drifting subpulses of PSR B0809+74 evolve with time and observing frequency. We show that the s
Externí odkaz:
http://arxiv.org/abs/1302.2321
Autor:
Hassall, T. E., Stappers, B. W., Hessels, J. W. T., Kramer, M., Alexov, A., Anderson, K., Coenen, T., Karastergiou, A., Keane, E. F., Kondratiev, V. I., Lazaridis, K., van Leeuwen, J., Noutsos, A., Serylak, M., Sobey, C., Verbiest, J. P. W., Weltevrede, P., Zagkouris, K., Fender, R., Wijers, R. A. M. J., Bahren, L., Bell, M. E., Broderick, J. W., Corbel, S., Daw, E. J., Dhillon, V. S., Eisloffel, J., Falcke, H., Griessmeier, J. -M., Jonker, P., Law, C., Markoff, S., Miller-Jones, J. C. A., Osten, R., Rol, E., Scaife, A. M. M., Scheers, B., Schellart, P., Spreeuw, H., Swinbank, J., ter Veen, S., Wise, M. W., Wijnands, R., Wucknitz, O., Zarka, P., Asgekar, A., Bell, M. R., Bentum, M. J., Bernardi, G., Best, P., Bonafede, A., Boonstra, A. J., Brentjens, M., Brouw, W. N., Bruggen, M., Butcher, H. R., Ciardi, B., Garrett, M. A., Gerbers, M., Gunst, A. W., van Haarlem, M. P., Heald, G., Hoeft, M., Holties, H., de Jong, A., Koopmans, L. V. E., Kuniyoshi, M., Kuper, G., Loose, G. M., Maat, P., Masters, J., McKean, J. P., Meulman, H., Mevius, M., Munk, H., Noordam, J. E., Orru, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pizzo, R., Polatidis, A., Reich, W., Rottgering, H., Sluman, J., Steinmetz, M., Sterks, C. G. M., Tagger, M., Tang, Y., Tasse, C., Vermeulen, R., van Weeren, R. J., Wijnholds, S. J., Yatawatta, S.
Publikováno v:
A&A Volume 543, July 2012
Dispersion in the interstellar medium is a well known phenomenon that follows a simple relationship, which has been used to predict the time delay of dispersed radio pulses since the late 1960s. We performed wide-band simultaneous observations of fou
Externí odkaz:
http://arxiv.org/abs/1204.3864
Autor:
Armour, W., Karastergiou, A., Giles, M., Williams, C., Magro, A., Zagkouris, K., Roberts, S., Salvini, S., Dulwich, F., Mort, B.
Astrophysical radio transients are excellent probes of extreme physical processes originating from compact sources within our Galaxy and beyond. Radio frequency signals emitted from these objects provide a means to study the intervening medium throug
Externí odkaz:
http://arxiv.org/abs/1111.6399
Synchronous X-ray and Radio Mode Switches: A Rapid Global Transformation of the Pulsar Magnetosphere
Autor:
Hermsen, W., Hessels, J. W. T., Kuiper, L., van Leeuwen, J., Mitra, D., de Plaa, J., Rankin, J. M., Stappers, B. W., Wright, G. A. E., Basu, R., Alexov, A., Coenen, T., Grießmeier, J.-M., Hassall, T. E., Karastergiou, A., Keane, E., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Noutsos, A., Serylak, M., Pilia, M., Sobey, C., Weltevrede, P., Zagkouris, K., Asgekar, A., Avruch, I. M., Batejat, F., Bell, M. E., Bell, M. R., Bentum, M. J., Bernardi, G., Best, P., Bîrzan, L., Bonafede, A., Breitling, F., Broderick, J., Brüggen, M., Butcher, H. R., Ciardi, B., Duscha, S., Eislöffel, J., Falcke, H., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., de Gasperin, F., de Geus, E., Gunst, A. W., Heald, G., Hoeft, M., Horneffer, A., Iacobelli, M., Kuper, G., Maat, P., Macario, G., Markoff, S., McKean, J. P., Mevius, M., Miller-Jones, J. C. A., Morganti, R., Munk, H., Orrú, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pizzo, R., Polatidis, A. G., Rawlings, S., Reich, W., Röttgering, H., Scaife, A. M. M., Schoenmakers, A., Shulevski, A., Sluman, J., Steinmetz, M., Tagger, M., Tang, Y., Tasse, C., Veen, S. ter, Vermeulen, R., van de Brink, R. H., van Weeren, R. J., Wijers, R. A. M. J., Wise, M. W., Wucknitz, O., Yatawatta, S., Zarka, P.
Publikováno v:
Science, 2013 Jan . 339(6118), 436-439.
Externí odkaz:
http://dx.doi.org/10.1126/science.1230960
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