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5,227 results on '"McFadden, R. A."'

101. Liver Transplantation for Acute Hepatic Decompensation Achieves Excellent Outcomes without Increased Recidivism Rates: A Single Center Experience

Author: Monsour, H., primary, Victor, D., additional, Boktour, M., additional, Galati, J., additional, Ontiveros, J., additional, Theriot, L., additional, McFadden, R., additional, Mobley, C., additional, Saharia, A., additional, Gordon-Burroughs, S., additional, and Ghobrial, M., additional
Published: 2016
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102. Lunar occultation of the diffuse radio sky : LOFAR measurements between 35 and 80 MHz

Author: Vedantham, H. K., Koopmans, L. V. E., de Bruyn, A. G., Wijnholds, S. J., Brentjens, M., Abdalla, F. B., Asad, K. M. B., Bernardi, G., Bus, S., Chapman, E., Ciardi, B., Daiboo, S., Fernandez, E. R., Ghosh, A., Harker, G., Jelic, V., Jensen, H., Kazemi, S., Lambropoulos, P., Martinez-Rubi, O., Mellema, G., Mevius, M., Offringa, A. R., Pandey, V. N., Patil, A. H., Thomas, R. M., Veligatla, V., Yatawatta, S., Zaroubi, S., Anderson, J., Asgekar, A., Bell, M. E., Bentum, M. J., Best, P., Bonafede, A., Breitling, F., Broderick, J., Brüggen, M., Butcher, H. R., Corstanje, A., de Gasperin, F., de Geus, E., Deller, A., Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Grießmeier, J., Gunst, A. W., Hassall, T. E., Heald, G., Hoeft, M., Hörandel, J., Iacobelli, M., Juette, E., Kondratiev, V. I., Kuniyoshi, M., Kuper, G., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., McKean, J. P., Mulcahy, D. D., Munk, H., Nelles, A., Norden, M. J., Orru, E., Pandey-Pommier, M., Pizzo, R., Polatidis, A. G., Reich, W., Renting, A., Röttgering, H., Schwarz, D., Shulevski, A., Smirnov, O., Stappers, B. W., Steinmetz, M., Swinbank, J., Tagger, M., Tang, Y., Tasse, C., ter Veen, S., Thoudam, Satyendra, Toribio, C., Vocks, C., Wise, M. W., Wucknitz, O., Zarka, P., Vedantham, H. K., Koopmans, L. V. E., de Bruyn, A. G., Wijnholds, S. J., Brentjens, M., Abdalla, F. B., Asad, K. M. B., Bernardi, G., Bus, S., Chapman, E., Ciardi, B., Daiboo, S., Fernandez, E. R., Ghosh, A., Harker, G., Jelic, V., Jensen, H., Kazemi, S., Lambropoulos, P., Martinez-Rubi, O., Mellema, G., Mevius, M., Offringa, A. R., Pandey, V. N., Patil, A. H., Thomas, R. M., Veligatla, V., Yatawatta, S., Zaroubi, S., Anderson, J., Asgekar, A., Bell, M. E., Bentum, M. J., Best, P., Bonafede, A., Breitling, F., Broderick, J., Brüggen, M., Butcher, H. R., Corstanje, A., de Gasperin, F., de Geus, E., Deller, A., Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Grießmeier, J., Gunst, A. W., Hassall, T. E., Heald, G., Hoeft, M., Hörandel, J., Iacobelli, M., Juette, E., Kondratiev, V. I., Kuniyoshi, M., Kuper, G., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., McKean, J. P., Mulcahy, D. D., Munk, H., Nelles, A., Norden, M. J., Orru, E., Pandey-Pommier, M., Pizzo, R., Polatidis, A. G., Reich, W., Renting, A., Röttgering, H., Schwarz, D., Shulevski, A., Smirnov, O., Stappers, B. W., Steinmetz, M., Swinbank, J., Tagger, M., Tang, Y., Tasse, C., ter Veen, S., Thoudam, Satyendra, Toribio, C., Vocks, C., Wise, M. W., Wucknitz, O., and Zarka, P.
Abstract: We present radio observations of the Moon between 35 and 80 MHz to demonstrate a novel technique of interferometrically measuring large-scale diffuse emission extending far beyond the primary beam (global signal) for the first time. In particular, we show that (i) the Moon appears as a negative-flux source at frequencies 35 < ν < 80 MHz since it is ‘colder’ than the diffuse Galactic background it occults, (ii) using the (negative) flux of the lunar disc, we can reconstruct the spectrum of the diffuse Galactic emission with the lunar thermal emission as a reference, and (iii) that reflected RFI (radio-frequency interference) is concentrated at the centre of the lunar disc due to specular nature of reflection, and can be independently measured. Our RFI measurements show that (i) Moon-based Cosmic Dawn experiments must design for an Earth-isolation of better than 80 dB to achieve an RFI temperature <1 mK, (ii) Moon-reflected RFI contributes to a dipole temperature less than 20 mK for Earth-based Cosmic Dawn experiments, (iii) man-made satellite-reflected RFI temperature exceeds 20 mK if the aggregate scattering cross-section of visible satellites exceeds 175 m2 at 800 km height, or 15 m2 at 400 km height. Currently, our diffuse background spectrum is limited by sidelobe confusion on short baselines (10–15 per cent level). Further refinement of our technique may yield constraints on the redshifted global 21 cm signal from Cosmic Dawn (40 > z > 12) and the Epoch of Reionization (12 > z > 5).
Published: 2015
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103. Probing atmospheric electric fields in thunderstorms through radio emission from cosmic-ray-induced air showers

Author: Schellart, P, Trinh, T. N. G., Buitink, S, Corstanje, Arthur, Enriquez, J.E., Falcke, H, Hörandel, J.R., Nelles, A, Rachen, J.P., Rossetto, L, Scholten, O, Ter Veen, Sander, Thoudam, Satyendra, Ebert, U, Koehn, C, Rutjes, C, Alexov, A., Anderson, J M, Avruch, Ian M., Bentum, M J, Bernardi, G, Best, Phillip, Bonafede, A, Breitling, F, Broderick, J, Bruggen, M, Butcher, Harvey, Ciardi, Benedetta, de Geus, Eugene, de Vos, Marco, Duscha, S, Eisloffel, Jochen, Hoeft, M, Holties, H. A, Juette, E, Kondratiev, V. I., Kuniyoshi, M, Kuper, G., Mann, Gottfried, McFadden, R, McKay-Bukowski, D, McKean, J P, Mevius, Maaijke, Moldon, J, Norden, M J, Orru, Emanuela, Paas, H., Pandey-Pommier, Mamta, Pizzo, R, Polatidis, A.G., Reich, W, Rottgering, Hubb, Scaife, Anna, Schwarz, Dominik, Serylak, M, Smirnov, O, Steinmetz, M., Swinbank, J, Tagger, Michel, Tasse, C, van Weeren, Reinout J., Toribio, C., Vermeulen, R.C., Vocks, Christian, Wise, Michael W, Wucknitz, O, Zarka, P, Schellart, P, Trinh, T. N. G., Buitink, S, Corstanje, Arthur, Enriquez, J.E., Falcke, H, Hörandel, J.R., Nelles, A, Rachen, J.P., Rossetto, L, Scholten, O, Ter Veen, Sander, Thoudam, Satyendra, Ebert, U, Koehn, C, Rutjes, C, Alexov, A., Anderson, J M, Avruch, Ian M., Bentum, M J, Bernardi, G, Best, Phillip, Bonafede, A, Breitling, F, Broderick, J, Bruggen, M, Butcher, Harvey, Ciardi, Benedetta, de Geus, Eugene, de Vos, Marco, Duscha, S, Eisloffel, Jochen, Hoeft, M, Holties, H. A, Juette, E, Kondratiev, V. I., Kuniyoshi, M, Kuper, G., Mann, Gottfried, McFadden, R, McKay-Bukowski, D, McKean, J P, Mevius, Maaijke, Moldon, J, Norden, M J, Orru, Emanuela, Paas, H., Pandey-Pommier, Mamta, Pizzo, R, Polatidis, A.G., Reich, W, Rottgering, Hubb, Scaife, Anna, Schwarz, Dominik, Serylak, M, Smirnov, O, Steinmetz, M., Swinbank, J, Tagger, Michel, Tasse, C, van Weeren, Reinout J., Toribio, C., Vermeulen, R.C., Vocks, Christian, Wise, Michael W, Wucknitz, O, and Zarka, P
Abstract: We present measurements of radio emission from cosmic ray air showers that took place during thunderstorms. The intensity and polarization patterns of these air showers are radically different from those measured during fair-weather conditions. With the use of a simple two-layer model for the atmospheric electric field, these patterns can be well reproduced by state-of-the-art simulation codes. This in turn provides a novel way to study atmospheric electric fields.
Published: 2015

104. LOFAR sparse image reconstruction

Author: Garsden, H., Girard, J. N., Starck, J. L., Corbel, S., Tasse, C., Woiselle, A., McKean, J. P., van Amesfoort, A. S., Anderson, J., Avruch, I. M., Beck, R., Bentum, M. J., Best, P., Breitling, F., Broderick, J., Brüggen, M., Butcher, H. R., Ciardi, B., de Gasperin, F., de Geus, E., de Vos, Marco, Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Griessmeier, J., Gunst, A. W., Hassall, T. E., Heald, G., Hoeft, M., Hörandel, J., van der Horst, A., Juette, E., Karastergiou, A., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Kuper, G., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., Mulcahy, D. D., Munk, H., Norden, M. J., Orru, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pietka, G., Pizzo, R., Polatidis, A. G., Renting, A., Röttgering, H., Rowlinson, A., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tang, Y., Thoudam, S., Toribio, C., Vermeulen, R., Vocks, C., van Weeren, R. J., Wijnholds, S. J., Wise, M. W., Wucknitz, O., Yatawatta, S., Zarka, P., Zensus, A., Garsden, H., Girard, J. N., Starck, J. L., Corbel, S., Tasse, C., Woiselle, A., McKean, J. P., van Amesfoort, A. S., Anderson, J., Avruch, I. M., Beck, R., Bentum, M. J., Best, P., Breitling, F., Broderick, J., Brüggen, M., Butcher, H. R., Ciardi, B., de Gasperin, F., de Geus, E., de Vos, Marco, Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Griessmeier, J., Gunst, A. W., Hassall, T. E., Heald, G., Hoeft, M., Hörandel, J., van der Horst, A., Juette, E., Karastergiou, A., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Kuper, G., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., Mulcahy, D. D., Munk, H., Norden, M. J., Orru, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pietka, G., Pizzo, R., Polatidis, A. G., Renting, A., Röttgering, H., Rowlinson, A., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tang, Y., Thoudam, S., Toribio, C., Vermeulen, R., Vocks, C., van Weeren, R. J., Wijnholds, S. J., Wise, M. W., Wucknitz, O., Yatawatta, S., Zarka, P., and Zensus, A.
Abstract: CONTEXT. The LOw Frequency ARray (LOFAR) radio telescope is a giant digital phased array interferometer with multiple antennas distributed in Europe. It provides discrete sets of Fourier components of the sky brightness. Recovering the original brightness distribution with aperture synthesis forms an inverse problem that can be solved by various deconvolution and minimization methods AIMS. Recent papers have established a clear link between the discrete nature of radio interferometry measurement and the "compressed sensing" (CS) theory, which supports sparse reconstruction methods to form an image from the measured visibilities. Empowered by proximal theory, CS offers a sound framework for efficient global minimization and sparse data representation using fast algorithms. Combined with instrumental direction-dependent effects (DDE) in the scope of a real instrument, we developed and validated a new method based on this framework METHODS. We implemented a sparse reconstruction method in the standard LOFAR imaging tool and compared the photometric and resolution performance of this new imager with that of CLEAN-based methods (CLEAN and MS-CLEAN) with simulated and real LOFAR data Results. We show that i) sparse reconstruction performs as well as CLEAN in recovering the flux of point sources; ii) performs much better on extended objects (the root mean square error is reduced by a factor of up to 10); and iii) provides a solution with an effective angular resolution 2-3 times better than the CLEAN images. CONCLUSIONS. Sparse recovery gives a correct photometry on high dynamic and wide-field images and improved realistic structures of extended sources (of simulated and real LOFAR datasets). This sparse reconstruction method is compatible with modern interferometric imagers that handle DDE corrections (A- and W-projections) required for current and future instruments such as LOFAR and SKA
Published: 2015

105. The LOFAR long baseline snapshot calibrator survey

Author: Moldón, J., Deller, A. T., Wucknitz, O., Jackson, N., Drabent, A., Carozzi, T., Conway, J., Kapinska, A. D., McKean, J. P., Morabito, L., Varenius, E., Zarka, P., Anderson, J., Asgekar, A., Avruch, I. M., Bell, M. E., Bentum, M. J., Bernardi, G., Best, P., Bîrzan, L., Bregman, J., Breitling, F., Broderick, J. W., Brüggen, M., Butcher, H. R., Carbone, D., Ciardi, B., de Gasperin, F., de Geus, E., Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Grießmeier, J., Gunst, A. W., Hamaker, J. P., Hassall, T. E., Heald, G., Hoeft, M., Juette, E., Karastergiou, A., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Kuper, G., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., Morganti, R., Munk, H., Norden, M. J., Offringa, A. R., Orru, E., Paas, H., Pandey-Pommier, M., Pizzo, R., Polatidis, A. G., Reich, W., Röttgering, H., Rowlinson, A., Scaife, A. M. M., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Tagger, M., Tang, Y., Tasse, C., Thoudam, Satyendra, Toribio, M. C., Vermeulen, R., Vocks, C., van Weeren, R. J., White, S., Wise, M. W., Yatawatta, S., Zensus, A., Moldón, J., Deller, A. T., Wucknitz, O., Jackson, N., Drabent, A., Carozzi, T., Conway, J., Kapinska, A. D., McKean, J. P., Morabito, L., Varenius, E., Zarka, P., Anderson, J., Asgekar, A., Avruch, I. M., Bell, M. E., Bentum, M. J., Bernardi, G., Best, P., Bîrzan, L., Bregman, J., Breitling, F., Broderick, J. W., Brüggen, M., Butcher, H. R., Carbone, D., Ciardi, B., de Gasperin, F., de Geus, E., Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Grießmeier, J., Gunst, A. W., Hamaker, J. P., Hassall, T. E., Heald, G., Hoeft, M., Juette, E., Karastergiou, A., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Kuper, G., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., Morganti, R., Munk, H., Norden, M. J., Offringa, A. R., Orru, E., Paas, H., Pandey-Pommier, M., Pizzo, R., Polatidis, A. G., Reich, W., Röttgering, H., Rowlinson, A., Scaife, A. M. M., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Tagger, M., Tang, Y., Tasse, C., Thoudam, Satyendra, Toribio, M. C., Vermeulen, R., Vocks, C., van Weeren, R. J., White, S., Wise, M. W., Yatawatta, S., and Zensus, A.
Abstract: Aims. An efficient means of locating calibrator sources for international LOw Frequency ARray (LOFAR) is developed and used to determine the average density of usable calibrator sources on the sky for subarcsecond observations at 140 MHz. Methods. We used the multi-beaming capability of LOFAR to conduct a fast and computationally inexpensive survey with the full international LOFAR array. Sources were preselected on the basis of 325 MHz arcminute-scale flux density using existing catalogues. By observing 30 different sources in each of the 12 sets of pointings per hour, we were able to inspect 630 sources in two hours to determine if they possess a sufficiently bright compact component to be usable as LOFAR delay calibrators. Results. More than 40% of the observed sources are detected on multiple baselines between international stations and 86 are classified as satisfactory calibrators. We show that a flat low-frequency spectrum (from 74 to 325 MHz) is the best predictor of compactness at 140 MHz. We extrapolate from our sample to show that the sky density of calibrators that are sufficiently bright to calibrate dispersive and non-dispersive delays for the international LOFAR using existing methods is 1.0 per square degree. Conclusions. The observed density of satisfactory delay calibrator sources means that observations with international LOFAR should be possible at virtually any point in the sky provided that a fast and efficient search, using the methodology described here, is conducted prior to the observation to identify the best calibrator.
Published: 2015
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106. Wide-field LOFAR imaging of the field around the double-double radio galaxy B1834+620 : A fresh view on a restarted AGN and doubeltjes

Author: Orrù, E., van Velzen, S., Pizzo, R. F., Yatawatta, S., Paladino, R., Iacobelli, M., Murgia, M., Falcke, H., Morganti, R., de Bruyn, A. G., Ferrari, C., Anderson, J., Bonafede, A., Mulcahy, D., Asgekar, A., Avruch, I. M., Beck, R., Bell, M. E., van Bemmel, I., Bentum, M. J., Bernardi, G., Best, P., Breitling, F., Broderick, J. W., Brüggen, M., Butcher, H. R., Ciardi, B., Conway, J. E., Corstanje, A., de Geus, E., Deller, A., Duscha, S., Eislöffel, J., Engels, D., Frieswijk, W., Garrett, M. A., Grießmeier, J., Gunst, A. W., Hamaker, J. P., Heald, G., Hoeft, M., van der Horst, A. J., Intema, H., Juette, E., Kohler, J., Kondratiev, V. I., Kuniyoshi, M., Kuper, G., Loose, M., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., Miley, G., Moldon, J., Molenaar, G., Munk, H., Nelles, A., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pietka, G., Polatidis, A. G., Reich, W., Röttgering, H., Rowlinson, A., Scaife, A., Schoenmakers, A., Schwarz, D., Serylak, M., Shulevski, A., Smirnov, O., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tasse, C., Thoudam, Satyendra, Toribio, M. C., Vermeulen, R., Vocks, C., van Weeren, R. J., Wijers, R. A. M. J., Wise, M. W., Wucknitz, O., Orrù, E., van Velzen, S., Pizzo, R. F., Yatawatta, S., Paladino, R., Iacobelli, M., Murgia, M., Falcke, H., Morganti, R., de Bruyn, A. G., Ferrari, C., Anderson, J., Bonafede, A., Mulcahy, D., Asgekar, A., Avruch, I. M., Beck, R., Bell, M. E., van Bemmel, I., Bentum, M. J., Bernardi, G., Best, P., Breitling, F., Broderick, J. W., Brüggen, M., Butcher, H. R., Ciardi, B., Conway, J. E., Corstanje, A., de Geus, E., Deller, A., Duscha, S., Eislöffel, J., Engels, D., Frieswijk, W., Garrett, M. A., Grießmeier, J., Gunst, A. W., Hamaker, J. P., Heald, G., Hoeft, M., van der Horst, A. J., Intema, H., Juette, E., Kohler, J., Kondratiev, V. I., Kuniyoshi, M., Kuper, G., Loose, M., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., Miley, G., Moldon, J., Molenaar, G., Munk, H., Nelles, A., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pietka, G., Polatidis, A. G., Reich, W., Röttgering, H., Rowlinson, A., Scaife, A., Schoenmakers, A., Schwarz, D., Serylak, M., Shulevski, A., Smirnov, O., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tasse, C., Thoudam, Satyendra, Toribio, M. C., Vermeulen, R., Vocks, C., van Weeren, R. J., Wijers, R. A. M. J., Wise, M. W., and Wucknitz, O.
Abstract: Context. The existence of double-double radio galaxies (DDRGs) is evidence for recurrent jet activity in active galactic nuclei (AGN), as expected from standard accretion models. A detailed study of these rare sources provides new perspectives for investigating the AGN duty cycle, AGN-galaxy feedback, and accretion mechanisms. Large catalogues of radio sources, on the other hand, provide statistical information about the evolution of the radio-loud AGN population out to high redshifts. Aims. Using wide-field imaging with the LOFAR telescope, we study both a well-known DDRG as well as a large number of radio sources in the field of view. Methods. We present a high resolution image of the DDRG B1834+620 obtained at 144 MHz using LOFAR commissioning data. Our image covers about 100 square degrees and contains over 1000 sources. Results. The four components of the DDRG B1834+620 have been resolved for the first time at 144 MHz. Inner lobes were found to point towards the direction of the outer lobes, unlike standard FR II sources. Polarized emission was detected at +60 rad m-2 in the northern outer lobe. The high spatial resolution allows the identification of a large number of small double-lobed radio sources; roughly 10% of all sources in the field are doubles with a separation smaller than 1′. Conclusions. The spectral fit of the four components is consistent with a scenario in which the outer lobes are still active or the jets recently switched off, while emission of the inner lobes is the result of a mix-up of new and old jet activity. From the presence of the newly extended features in the inner lobes of the DDRG, we can infer that the mechanism responsible for their formation is the bow shock that is driven by the newly launched jet. We find that the density of the small doubles exceeds the density of FR II sources with similar properties at 1.4 GHz, but this difference becomes smaller for low flux densities. Finally, we show that the significant challenges of wi
Published: 2015
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107. The shape of the radio wavefront of extensive air showers as measured with LOFAR

Author: Corstanje, A., Schellart, P., Nelles, A., Buitink, S., Enriquez, J. E., Falcke, H., Frieswijk, W., Hörandel, J. R., Krause, M., Rachen, J. P., Scholten, O., ter Veen, S., Thoudam, Satyendra, Trinh, T. N. G., van den Akker, M., Alexov, A., Anderson, J., 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., de Gasperin, F., de Geus, E., de Vos, M., Duscha, S., Eislöffel, J., Engels, D., Fallows, R. A., Ferrari, C., Garrett, M. A., Grießmeier, J., Gunst, A. W., Hamaker, J. P., Hoeft, M., Horneffer, A., Iacobelli, M., Juette, E., Karastergiou, A., Kohler, J., Kondratiev, V. I., Kuniyoshi, M., Kuper, G., Maat, P., Mann, G., McFadden, R., McKay-Bukowski, D., Mevius, M., Munk, H., Norden, M. J., Orru, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pizzo, R., Polatidis, A. G., Reich, W., Röttgering, H., Scaife, A. M. M., Schwarz, D., Smirnov, O., Stewart, A., Steinmetz, M., Swinbank, J., Tagger, M., Tang, Y., Tasse, C., Toribio, C., Vermeulen, R., Vocks, C., van Weeren, R. J., Wijnholds, S. J., Wucknitz, O., Yatawatta, S., Zarka, P., Corstanje, A., Schellart, P., Nelles, A., Buitink, S., Enriquez, J. E., Falcke, H., Frieswijk, W., Hörandel, J. R., Krause, M., Rachen, J. P., Scholten, O., ter Veen, S., Thoudam, Satyendra, Trinh, T. N. G., van den Akker, M., Alexov, A., Anderson, J., 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., de Gasperin, F., de Geus, E., de Vos, M., Duscha, S., Eislöffel, J., Engels, D., Fallows, R. A., Ferrari, C., Garrett, M. A., Grießmeier, J., Gunst, A. W., Hamaker, J. P., Hoeft, M., Horneffer, A., Iacobelli, M., Juette, E., Karastergiou, A., Kohler, J., Kondratiev, V. I., Kuniyoshi, M., Kuper, G., Maat, P., Mann, G., McFadden, R., McKay-Bukowski, D., Mevius, M., Munk, H., Norden, M. J., Orru, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pizzo, R., Polatidis, A. G., Reich, W., Röttgering, H., Scaife, A. M. M., Schwarz, D., Smirnov, O., Stewart, A., Steinmetz, M., Swinbank, J., Tagger, M., Tang, Y., Tasse, C., Toribio, C., Vermeulen, R., Vocks, C., van Weeren, R. J., Wijnholds, S. J., Wucknitz, O., Yatawatta, S., and Zarka, P.
Abstract: Extensive air showers, induced by high energy cosmic rays impinging on the Earth’s atmosphere, produce radio emission that is measured with the LOFAR radio telescope. As the emission comes from a finite distance of a few kilometers, the incident wavefront is non-planar. A spherical, conical or hyperbolic shape of the wavefront has been proposed, but measurements of individual air showers have been inconclusive so far. For a selected high-quality sample of 161 measured extensive air showers, we have reconstructed the wavefront by measuring pulse arrival times to sub-nanosecond precision in 200 to 350 individual antennas. For each measured air shower, we have fitted a conical, spherical, and hyperboloid shape to the arrival times. The fit quality and a likelihood analysis show that a hyperboloid is the best parameterization. Using a non-planar wavefront shape gives an improved angular resolution, when reconstructing the shower arrival direction. Furthermore, a dependence of the wavefront shape on the shower geometry can be seen. This suggests that it will be possible to use a wavefront shape analysis to get an additional handle on the atmospheric depth of the shower maximum, which is sensitive to the mass of the primary particle.
Published: 2015
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108. Limit on the ultrahigh-energy neutrino flux from lunar observations with the Parkes radio telescope

Author: Bray, J., Ekers, Ronald, Roberts, P., Reynolds, J., James, C., Phillips, C., Protheroe, R., McFadden, R., Aartsen, M., Bray, J., Ekers, Ronald, Roberts, P., Reynolds, J., James, C., Phillips, C., Protheroe, R., McFadden, R., and Aartsen, M.
Abstract: © 2015 American Physical Society. We report a limit on the ultrahigh-energy neutrino flux based on a nondetection of radio pulses from neutrino-initiated particle cascades in the Moon, in observations with the Parkes radio telescope undertaken as part of the LUNASKA project. Because of the improved sensitivity of these observations, which had an effective duration of 127 hours and a frequency range of 1.2-1.5 GHz, this limit extends to lower neutrino energies than those from previous lunar radio experiments, with a detection threshold below 1020eV. The calculation of our limit allows for the possibility of lunar-origin pulses being misidentified as local radio interference, and includes the effect of small-scale lunar surface roughness. The targeting strategy of the observations also allows us to place a directional limit on the neutrino flux from the nearby radio galaxy Centaurus A.
Published: 2015

109. A lunar radio experiment with the Parkes radio telescope for the LUNASKA project

Author: Bray, J., Ekers, Ronald, Roberts, P., Reynolds, J., James, C., Phillips, C., Protheroe, R., McFadden, R., Aartsen, M., Bray, J., Ekers, Ronald, Roberts, P., Reynolds, J., James, C., Phillips, C., Protheroe, R., McFadden, R., and Aartsen, M.
Abstract: © 2014 Elsevier B.V. We describe an experiment using the Parkes radio telescope in the 1.2-1.5 GHz frequency range as part of the LUNASKA project, to search for nanosecond-scale pulses from particle cascades in the Moon, which may be triggered by ultra-high-energy astroparticles. Through the combination of a highly sensitive multi-beam radio receiver, a purpose-built backend and sophisticated signal-processing techniques, we achieve sensitivity to radio pulses with a threshold electric field strength of 0.0053 µV/m/MHz, lower than previous experiments by a factor of three. We observe no pulses in excess of this threshold in observations with an effective duration of 127 h. The techniques we employ, including compensating for the phase, dispersion and spectrum of the expected pulse, are relevant for future lunar radio experiments.
Published: 2015

110. LOFAR discovery of a quiet emission mode in PSR B0823+26

Author: Sobey, Charlotte, Young, N., Hessels, J., Weltevrede, P., Noutsos, A., Stappers, B., Kramer, M., Bassa, C., Lyne, A., Kondratiev, V., Hassall, T., Keane, E., Bilous, A., Breton, R., Grießmeier, J., Karastergiou, A., Pilia, M., Serylak, M., Ter Veen, S., Van Leeuwen, J., Alexov, A., Anderson, J., Asgekar, A., Avruch, I., Bell, M., Bentum, M., Bernardi, G., Best, P., Birzan, L., Bonafede, A., Breitling, F., Broderick, J., Brüggen, M., Corstanje, A., Carbone, D., De Geus, E., De Vos, M., Van Duin, A., Duscha, S., Eislöffel, J., Falcke, H., Fallows, R., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M., Gunst, A., Hamaker, J., Heald, G., Hoeft, M., Hörandel, J., Jütte, E., Kuper, G., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., McKean, J., Mulcahy, D., Munk, H., Nelles, A., Norden, M., Orrù, E., Paas, H., Pandey-Pommier, M., Pandey, V., Pietka, G., Pizzo, R., Polatidis, A., Rafferty, D., Renting, A., Röttgering, H., Rowlinson, A., Scaife, A., Schwarz, D., Sluman, J., Smirnov, O., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Sobey, Charlotte, Young, N., Hessels, J., Weltevrede, P., Noutsos, A., Stappers, B., Kramer, M., Bassa, C., Lyne, A., Kondratiev, V., Hassall, T., Keane, E., Bilous, A., Breton, R., Grießmeier, J., Karastergiou, A., Pilia, M., Serylak, M., Ter Veen, S., Van Leeuwen, J., Alexov, A., Anderson, J., Asgekar, A., Avruch, I., Bell, M., Bentum, M., Bernardi, G., Best, P., Birzan, L., Bonafede, A., Breitling, F., Broderick, J., Brüggen, M., Corstanje, A., Carbone, D., De Geus, E., De Vos, M., Van Duin, A., Duscha, S., Eislöffel, J., Falcke, H., Fallows, R., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M., Gunst, A., Hamaker, J., Heald, G., Hoeft, M., Hörandel, J., Jütte, E., Kuper, G., Maat, P., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., McKean, J., Mulcahy, D., Munk, H., Nelles, A., Norden, M., Orrù, E., Paas, H., Pandey-Pommier, M., Pandey, V., Pietka, G., Pizzo, R., Polatidis, A., Rafferty, D., Renting, A., Röttgering, H., Rowlinson, A., Scaife, A., Schwarz, D., Sluman, J., Smirnov, O., Steinmetz, M., Stewart, A., Swinbank, J., and Tagger, M.
Abstract: PSR B0823+26, a 0.53-s radio pulsar, displays a host of emission phenomena over time-scales of seconds to (at least) hours, including nulling, subpulse drifting, and mode-changing. Studying pulsars like PSR B0823+26 provides further insight into the relationship between these various emission phenomena and what they might teach us about pulsar magnetospheres. Here we report on the LOFAR (Low-Frequency Array) discovery that PSR B0823+26 has a weak and sporadically emitting 'quiet' (Q) emission mode that is over 100 times weaker (on average) and has a nulling fraction forty-times greater than that of the more regularly-emitting 'bright' (B) mode. Previously, the pulsar has been undetected in the Q mode, and was assumed to be nulling continuously. PSR B0823+26 shows a further decrease in average flux just before the transition into the B mode, and perhaps truly turns off completely at these times. Furthermore, simultaneous observations taken with the LOFAR, Westerbork, Lovell, and Effelsberg telescopes between 110 MHz and 2.7 GHz demonstrate that the transition between the Q mode and B mode occurs within one single rotation of the neutron star, and that it is concurrent across the range of frequencies observed. © 2015 The Authors.
Published: 2015

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

Author: Heald, G., Pizzo, R., Orrú, E., Breton, R., Carbone, D., Ferrari, C., Hardcastle, M., Jurusik, W., Macario, G., Mulcahy, D., Rafferty, D., Asgekar, A., Brentjens, M., Fallows, R., Frieswijk, W., Toribio, M., Adebahr, B., Arts, M., Bell, M., Bonafede, A., Bray, J., Broderick, J., Cantwell, T., Carroll, P., Cendes, Y., Clarke, A., Croston, J., Daiboo, S., de Gasperin, F., Gregson, J., Harwood, J., Hassall, T., Heesen, V., Horneffer, A., van der Horst, A., Iacobelli, M., Jelic, V., Jones, D., Kant, D., Kokotanekov, G., Martin, P., McKean, J., Morabito, L., Nikiel-Wroczynski, B., Offringa, A., Pandey, V., Pandey-Pommier, M., Pietka, M., Pratley, L., Riseley, C., Rowlinson, A., Sabater, J., Scaife, A., Scheers, L., Sendlinger, K., Shulevski, A., Sipior, M., Sobey, Charlotte Anne, Stewart, A., Stroe, A., Swinbank, J., Tasse, C., Trüstedt, J., Varenius, E., van Velzen, S., Vilchez, N., van Weeren, R., Wijnholds, S., Williams, W., De Bruyn, A., Nijboer, R., Wise, M., Alexov, A., Anderson, J., Avruch, I., Beck, R., van Bemmel, I., Bentum, M., Bernardi, G., Best, P., Breitling, F., Brouw, W., Brüggen, M., Butcher, H., Ciardi, B., Conway, J., de Geus, E., de Jong, A., de Vos, M., Deller, A., Dettmar, R., Duscha, S., Eislöffel, J., Engels, D., Falcke, J., Fender, R., Garrett, M., Grießmeier, J., Gunst, A., Hamaker, J., Hessels, J., Hoeft, J., Hörandel, J., Holties, H., Intema, H., Jackson, N., Jütte, E., Karastergiou, A., Klijn, W., Kondratiev, V., Koopmans, L., Kuniyoshi, M., Kuper, G., Law, C., van Leeuwen, J., Loose, M., Markoff, S., McFadden, R., McKay-Bukowski, D., Mevius, M., Miller-Jones, James, Morganti, R., Munk, H., Noordam, J., Norden, M., Pass, H., Polatidis, A., Reich, W., Renting, A., Röttgering, H., Schoenmakers, A., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B., Steinmetz, M., Tagger, M., Tang, Y., ter Veen, S., Thoudam, S., Vermeulen, R., Vocks, C., Vogt, C., Wijers, R., Wucknitz, O., Yatawatta, S., Zarka, P., Nelles, A., Maat, P., Heald, G., Pizzo, R., Orrú, E., Breton, R., Carbone, D., Ferrari, C., Hardcastle, M., Jurusik, W., Macario, G., Mulcahy, D., Rafferty, D., Asgekar, A., Brentjens, M., Fallows, R., Frieswijk, W., Toribio, M., Adebahr, B., Arts, M., Bell, M., Bonafede, A., Bray, J., Broderick, J., Cantwell, T., Carroll, P., Cendes, Y., Clarke, A., Croston, J., Daiboo, S., de Gasperin, F., Gregson, J., Harwood, J., Hassall, T., Heesen, V., Horneffer, A., van der Horst, A., Iacobelli, M., Jelic, V., Jones, D., Kant, D., Kokotanekov, G., Martin, P., McKean, J., Morabito, L., Nikiel-Wroczynski, B., Offringa, A., Pandey, V., Pandey-Pommier, M., Pietka, M., Pratley, L., Riseley, C., Rowlinson, A., Sabater, J., Scaife, A., Scheers, L., Sendlinger, K., Shulevski, A., Sipior, M., Sobey, Charlotte Anne, Stewart, A., Stroe, A., Swinbank, J., Tasse, C., Trüstedt, J., Varenius, E., van Velzen, S., Vilchez, N., van Weeren, R., Wijnholds, S., Williams, W., De Bruyn, A., Nijboer, R., Wise, M., Alexov, A., Anderson, J., Avruch, I., Beck, R., van Bemmel, I., Bentum, M., Bernardi, G., Best, P., Breitling, F., Brouw, W., Brüggen, M., Butcher, H., Ciardi, B., Conway, J., de Geus, E., de Jong, A., de Vos, M., Deller, A., Dettmar, R., Duscha, S., Eislöffel, J., Engels, D., Falcke, J., Fender, R., Garrett, M., Grießmeier, J., Gunst, A., Hamaker, J., Hessels, J., Hoeft, J., Hörandel, J., Holties, H., Intema, H., Jackson, N., Jütte, E., Karastergiou, A., Klijn, W., Kondratiev, V., Koopmans, L., Kuniyoshi, M., Kuper, G., Law, C., van Leeuwen, J., Loose, M., Markoff, S., McFadden, R., McKay-Bukowski, D., Mevius, M., Miller-Jones, James, Morganti, R., Munk, H., Noordam, J., Norden, M., Pass, H., Polatidis, A., Reich, W., Renting, A., Röttgering, H., Schoenmakers, A., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B., Steinmetz, M., Tagger, M., Tang, Y., ter Veen, S., Thoudam, S., Vermeulen, R., Vocks, C., Vogt, C., Wijers, R., Wucknitz, O., Yatawatta, S., Zarka, P., Nelles, A., and Maat, P.
Abstract: 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 to its intrinsic multifrequency nature providing information about the spectral properties of the detected sources over more than two octaves (from 30 to 160 MHz). The broadband frequency coverage, together with the fast survey speed generated by LOFAR's multibeaming capabilities, make MSSS the first survey of the sort anticipated to be carried out with the forthcoming Square Kilometre Array (SKA). Two of the sixteen frequency bands included in the survey were chosen to exactly overlap the frequency coverage of large-area Very Large Array (VLA) and Giant Metrewave Radio Telescope (GMRT) surveys at 74 MHz and 151 MHz respectively. The survey performance is illustrated within the MSSS Verification Field (MVF), a region of 100 square degrees centered at (a,d)J2000 = (15h,69°). The MSSS results from the MVF are compared with previous radio survey catalogs. We assess the flux and astrometric uncertainties in the catalog, as well as the completeness and reliability considering our source finding strategy. We determine the 90% completeness levels within the MVF to be 100 mJy at 135 MHz with 108? resolution, and 550 mJy at 50 MHz with 166? resolution. Images and catalogs for the full survey, expected to contain 150 000-200 000 sources, will be released to a public web server. We outline the plans for the ongoing production of the final survey products, and the ultimate public release of images and source catalogs.
Published: 2015

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

Author: Stewart, A. J., primary, Fender, R. P., additional, Broderick, J. W., additional, Hassall, T. E., additional, Muñoz-Darias, T., additional, Rowlinson, A., additional, Swinbank, J. D., additional, Staley, T. D., additional, Molenaar, G. J., additional, Scheers, B., additional, Grobler, T. L., additional, Pietka, M., additional, Heald, G., additional, McKean, J. P., additional, Bell, M. E., additional, Bonafede, A., additional, Breton, R. P., additional, Carbone, D., additional, Cendes, Y., additional, Clarke, A. O., additional, Corbel, S., additional, de Gasperin, F., additional, Eislöffel, J., additional, Falcke, H., additional, Ferrari, C., additional, Grießmeier, J.-M., additional, Hardcastle, M. J., additional, Heesen, V., additional, Hessels, J. W. T., additional, Horneffer, A., additional, Iacobelli, M., additional, Jonker, P., additional, Karastergiou, A., additional, Kokotanekov, G., additional, Kondratiev, V. I., additional, Kuniyoshi, M., additional, Law, C. J., additional, van Leeuwen, J., additional, Markoff, S., additional, Miller-Jones, J. C. A., additional, Mulcahy, D., additional, Orru, E., additional, Pandey-Pommier, M., additional, Pratley, L., additional, Rol, E., additional, Röttgering, H. J. A., additional, Scaife, A. M. M., additional, Shulevski, A., additional, Sobey, C. A., additional, Stappers, B. W., additional, Tasse, C., additional, van der Horst, A. J., additional, van Velzen, S., additional, van Weeren, R. J., additional, Wijers, R. A. M. J., additional, Wijnands, R., additional, Wise, M., additional, Zarka, P., additional, Alexov, A., additional, Anderson, J., additional, Asgekar, A., additional, Avruch, I. M., additional, Bentum, M. J., additional, Bernardi, G., additional, Best, P., additional, Breitling, F., additional, Brüggen, M., additional, Butcher, H. R., additional, Ciardi, B., additional, Conway, J. E., additional, Corstanje, A., additional, de Geus, E., additional, Deller, A., additional, Duscha, S., additional, Frieswijk, W., additional, Garrett, M. A., additional, Gunst, A. W., additional, van Haarlem, M. P., additional, Hoeft, M., additional, Hörandel, J., additional, Juette, E., additional, Kuper, G., additional, Loose, M., additional, Maat, P., additional, McFadden, R., additional, McKay-Bukowski, D., additional, Moldon, J., additional, Munk, H., additional, Norden, M. J., additional, Paas, H., additional, Polatidis, A. G., additional, Schwarz, D., additional, Sluman, J., additional, Smirnov, O., additional, Steinmetz, M., additional, Thoudam, S., additional, Toribio, M. C., additional, Vermeulen, R., additional, Vocks, C., additional, Wijnholds, S. J., additional, Wucknitz, O., additional, and Yatawatta, S., additional
Published: 2015
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113. Calibrating the absolute amplitude scale for air showers measured at LOFAR

Author: Nelles, A., primary, Hörandel, J. R., additional, Karskens, T., additional, Krause, M., additional, Buitink, S., additional, Corstanje, A., additional, Enriquez, J. E., additional, Erdmann, M., additional, Falcke, H., additional, Haungs, A., additional, Hiller, R., additional, Huege, T., additional, Krause, R., additional, Link, K., additional, Norden, M. J., additional, Rachen, J. P., additional, Rossetto, L., additional, Schellart, P., additional, Scholten, O., additional, Schröder, F. G., additional, Veen, S. ter, additional, Thoudam, S., additional, Trinh, T. N. G., additional, Weidenhaupt, K., additional, Wijnholds, S. J., additional, Anderson, J., additional, Bähren, L., additional, Bell, M. E., additional, Bentum, M. J., additional, Best, P., additional, Bonafede, A., additional, Bregman, J., additional, Brouw, W. N., additional, Brüggen, M., additional, Butcher, H. R., additional, Carbone, D., additional, Ciardi, B., additional, de Gasperin, F., additional, Duscha, S., additional, Eislöffel, J., additional, Fallows, R. A., additional, Frieswijk, W., additional, Garrett, M. A., additional, Haarlem, M. P. van, additional, Heald, G., additional, Hoeft, M., additional, Horneffer, A., additional, Iacobelli, M., additional, Juette, E., additional, Karastergiou, A., additional, Kohler, J., additional, Kondratiev, V. I., additional, Kuniyoshi, M., additional, Kuper, G., additional, Leeuwen, J. van, additional, Maat, P., additional, McFadden, R., additional, McKay-Bukowski, D., additional, Orru, E., additional, Paas, H., additional, Pandey-Pommier, M., additional, Pandey, V. N., additional, Pizzo, R., additional, Polatidis, A. G., additional, Reich, W., additional, Röttgering, H., additional, Schwarz, D., additional, Serylak, M., additional, Sluman, J., additional, Smirnov, O., additional, Tasse, C., additional, Toribio, M. C., additional, Vermeulen, R., additional, Weeren, R. J. van, additional, Wijers, R. A. M. J., additional, Wucknitz, O., additional, and Zarka, P., additional
Published: 2015
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114. The LOFAR Multifrequency Snapshot Sky Survey (MSSS)

Author: Heald, G. H., primary, Pizzo, R. F., additional, Orrú, E., additional, Breton, R. P., additional, Carbone, D., additional, Ferrari, C., additional, Hardcastle, M. J., additional, Jurusik, W., additional, Macario, G., additional, Mulcahy, D., additional, Rafferty, D., additional, Asgekar, A., additional, Brentjens, M., additional, Fallows, R. A., additional, Frieswijk, W., additional, Toribio, M. C., additional, Adebahr, B., additional, Arts, M., additional, Bell, M. R., additional, Bonafede, A., additional, Bray, J., additional, Broderick, J., additional, Cantwell, T., additional, Carroll, P., additional, Cendes, Y., additional, Clarke, A. O., additional, Croston, J., additional, Daiboo, S., additional, de Gasperin, F., additional, Gregson, J., additional, Harwood, J., additional, Hassall, T., additional, Heesen, V., additional, Horneffer, A., additional, van der Horst, A. J., additional, Iacobelli, M., additional, Jelić, V., additional, Jones, D., additional, Kant, D., additional, Kokotanekov, G., additional, Martin, P., additional, McKean, J. P., additional, Morabito, L. K., additional, Nikiel-Wroczyński, B., additional, Offringa, A., additional, Pandey, V. N., additional, Pandey-Pommier, M., additional, Pietka, M., additional, Pratley, L., additional, Riseley, C., additional, Rowlinson, A., additional, Sabater, J., additional, Scaife, A. M. M., additional, Scheers, L. H. A., additional, Sendlinger, K., additional, Shulevski, A., additional, Sipior, M., additional, Sobey, C., additional, Stewart, A. J., additional, Stroe, A., additional, Swinbank, J., additional, Tasse, C., additional, Trüstedt, J., additional, Varenius, E., additional, van Velzen, S., additional, Vilchez, N., additional, van Weeren, R. J., additional, Wijnholds, S., additional, Williams, W. L., additional, de Bruyn, A. G., additional, Nijboer, R., additional, Wise, M., additional, Alexov, A., additional, Anderson, J., additional, Avruch, I. M., additional, Beck, R., additional, Bell, M. E., additional, van Bemmel, I., additional, Bentum, M. J., additional, Bernardi, G., additional, Best, P., additional, Breitling, F., additional, Brouw, W. N., additional, Brüggen, M., additional, Butcher, H. R., additional, Ciardi, B., additional, Conway, J. E., additional, de Geus, E., additional, de Jong, A., additional, de Vos, M., additional, Deller, A., additional, Dettmar, R.-J., additional, Duscha, S., additional, Eislöffel, J., additional, Engels, D., additional, Falcke, H., additional, Fender, R., additional, Garrett, M. A., additional, Grießmeier, J., additional, Gunst, A. W., additional, Hamaker, J. P., additional, Hessels, J. W. T., additional, Hoeft, M., additional, Hörandel, J., additional, Holties, H. A., additional, Intema, H., additional, Jackson, N. J., additional, Jütte, E., additional, Karastergiou, A., additional, Klijn, W. F. A., additional, Kondratiev, V. I., additional, Koopmans, L. V. E., additional, Kuniyoshi, M., additional, Kuper, G., additional, Law, C., additional, van Leeuwen, J., additional, Loose, M., additional, Maat, P., additional, Markoff, S., additional, McFadden, R., additional, McKay-Bukowski, D., additional, Mevius, M., additional, Miller-Jones, J. C. A., additional, Morganti, R., additional, Munk, H., additional, Nelles, A., additional, Noordam, J. E., additional, Norden, M. J., additional, Paas, H., additional, Polatidis, A. G., additional, Reich, W., additional, Renting, A., additional, Röttgering, H., additional, Schoenmakers, A., additional, Schwarz, D., additional, Sluman, J., additional, Smirnov, O., additional, Stappers, B. W., additional, Steinmetz, M., additional, Tagger, M., additional, Tang, Y., additional, ter Veen, S., additional, Thoudam, S., additional, Vermeulen, R., additional, Vocks, C., additional, Vogt, C., additional, Wijers, R. A. M. J., additional, Wucknitz, O., additional, Yatawatta, S., additional, and Zarka, P., additional
Published: 2015
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115. Spin fluctuations in the exotic metallic state ofSr2RuO4studied withβ-NMR

Author: Cortie, D. L., primary, Buck, T., additional, Dehn, M. H., additional, Kiefl, R. F., additional, Levy, C. D. P., additional, McFadden, R. M. L., additional, Morris, G. D., additional, Pearson, M. R., additional, Salman, Z., additional, Maeno, Y., additional, and MacFarlane, W. A., additional
Published: 2015
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116. The peculiar radio galaxy 4C 35.06: a case for recurrent AGN activity?

Author: Shulevski, A., primary, Morganti, R., additional, Barthel, P. D., additional, Murgia, M., additional, van Weeren, R. J., additional, White, G. J., additional, Brüggen, M., additional, Kunert-Bajraszewska, M., additional, Jamrozy, M., additional, Best, P. N., additional, Röttgering, H. J. A., additional, Chyzy, K. T., additional, de Gasperin, F., additional, Bîrzan, L., additional, Brunetti, G., additional, Brienza, M., additional, Rafferty, D. A., additional, Anderson, J., additional, Beck, R., additional, Deller, A., additional, Zarka, P., additional, Schwarz, D., additional, Mahony, E., additional, Orrú, E., additional, Bell, M. E., additional, Bentum, M. J., additional, Bernardi, G., additional, Bonafede, A., additional, Breitling, F., additional, Broderick, J. W., additional, Butcher, H. R., additional, Carbone, D., additional, Ciardi, B., additional, de Geus, E., additional, Duscha, S., additional, Eislöffel, J., additional, Engels, D., additional, Falcke, H., additional, Fallows, R. A., additional, Fender, R., additional, Ferrari, C., additional, Frieswijk, W., additional, Garrett, M. A., additional, Grießmeier, J., additional, Gunst, A. W., additional, Heald, G., additional, Hoeft, M., additional, Hörandel, J., additional, Horneffer, A., additional, van der Horst, A. J., additional, Intema, H., additional, Juette, E., additional, Karastergiou, A., additional, Kondratiev, V. I., additional, Kramer, M., additional, Kuniyoshi, M., additional, Kuper, G., additional, Maat, P., additional, Mann, G., additional, McFadden, R., additional, McKay-Bukowski, D., additional, McKean, J. P., additional, Meulman, H., additional, Mulcahy, D. D., additional, Munk, H., additional, Norden, M. J., additional, Paas, H., additional, Pandey-Pommier, M., additional, Pizzo, R., additional, Polatidis, A. G., additional, Reich, W., additional, Rowlinson, A., additional, Scaife, A. M. M., additional, Serylak, M., additional, Sluman, J., additional, Smirnov, O., additional, Steinmetz, M., additional, Swinbank, J., additional, Tagger, M., additional, Tang, Y., additional, Tasse, C., additional, Thoudam, S., additional, Toribio, M. C., additional, Vermeulen, R., additional, Vocks, C., additional, Wijers, R. A. M. J., additional, Wise, M. W., additional, and Wucknitz, O., additional
Published: 2015
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117. LOFAR discovery of a quiet emission mode in PSR B0823+26

Author: Sobey, C., primary, Young, N. J., additional, Hessels, J. W. T., additional, Weltevrede, P., additional, Noutsos, A., additional, Stappers, B. W., additional, Kramer, M., additional, Bassa, C., additional, Lyne, A. G., additional, Kondratiev, V. I., additional, Hassall, T. E., additional, Keane, E. F., additional, Bilous, A. V., additional, Breton, R. P., additional, Grießmeier, J.-M., additional, Karastergiou, A., additional, Pilia, M., additional, Serylak, M., additional, Veen, S. ter, additional, van Leeuwen, J., additional, Alexov, A., additional, Anderson, J., additional, Asgekar, A., additional, Avruch, I. M., additional, Bell, M. E., additional, Bentum, M. J., additional, Bernardi, G., additional, Best, P., additional, Bîrzan, L., additional, Bonafede, A., additional, Breitling, F., additional, Broderick, J., additional, Brüggen, M., additional, Corstanje, A., additional, Carbone, D., additional, de Geus, E., additional, de Vos, M., additional, van Duin, A., additional, Duscha, S., additional, Eislöffel, J., additional, Falcke, H., additional, Fallows, R. A., additional, Fender, R., additional, Ferrari, C., additional, Frieswijk, W., additional, Garrett, M. A., additional, Gunst, A. W., additional, Hamaker, J. P., additional, Heald, G., additional, Hoeft, M., additional, Hörandel, J., additional, Jütte, E., additional, Kuper, G., additional, Maat, P., additional, Mann, G., additional, Markoff, S., additional, McFadden, R., additional, McKay-Bukowski, D., additional, McKean, J. P., additional, Mulcahy, D. D., additional, Munk, H., additional, Nelles, A., additional, Norden, M. J., additional, Orrù, E., additional, Paas, H., additional, Pandey-Pommier, M., additional, Pandey, V. N., additional, Pietka, G., additional, Pizzo, R., additional, Polatidis, A. G., additional, Rafferty, D., additional, Renting, A., additional, Röttgering, H., additional, Rowlinson, A., additional, Scaife, A. M. M., additional, Schwarz, D., additional, Sluman, J., additional, Smirnov, O., additional, Steinmetz, M., additional, Stewart, A., additional, Swinbank, J., additional, Tagger, M., additional, Tang, Y., additional, Tasse, C., additional, Thoudam, S., additional, Toribio, C., additional, Vermeulen, R., additional, Vocks, C., additional, van Weeren, R. J., additional, Wijers, R. A. M. J., additional, Wise, M. W., additional, Wucknitz, O., additional, Yatawatta, S., additional, and Zarka, P., additional
Published: 2015
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118. Lunar occultation of the diffuse radio sky: LOFAR measurements between 35 and 80 MHz

Author: Vedantham, H. K., primary, Koopmans, L. V. E., additional, de Bruyn, A. G., additional, Wijnholds, S. J., additional, Brentjens, M., additional, Abdalla, F. B., additional, Asad, K. M. B., additional, Bernardi, G., additional, Bus, S., additional, Chapman, E., additional, Ciardi, B., additional, Daiboo, S., additional, Fernandez, E. R., additional, Ghosh, A., additional, Harker, G., additional, Jelic, V., additional, Jensen, H., additional, Kazemi, S., additional, Lambropoulos, P., additional, Martinez-Rubi, O., additional, Mellema, G., additional, Mevius, M., additional, Offringa, A. R., additional, Pandey, V. N., additional, Patil, A. H., additional, Thomas, R. M., additional, Veligatla, V., additional, Yatawatta, S., additional, Zaroubi, S., additional, Anderson, J., additional, Asgekar, A., additional, Bell, M. E., additional, Bentum, M. J., additional, Best, P., additional, Bonafede, A., additional, Breitling, F., additional, Broderick, J., additional, Brüggen, M., additional, Butcher, H. R., additional, Corstanje, A., additional, de Gasperin, F., additional, de Geus, E., additional, Deller, A., additional, Duscha, S., additional, Eislöffel, J., additional, Engels, D., additional, Falcke, H., additional, Fallows, R. A., additional, Fender, R., additional, Ferrari, C., additional, Frieswijk, W., additional, Garrett, M. A., additional, Grießmeier, J., additional, Gunst, A. W., additional, Hassall, T. E., additional, Heald, G., additional, Hoeft, M., additional, Hörandel, J., additional, Iacobelli, M., additional, Juette, E., additional, Kondratiev, V. I., additional, Kuniyoshi, M., additional, Kuper, G., additional, Mann, G., additional, Markoff, S., additional, McFadden, R., additional, McKay-Bukowski, D., additional, McKean, J. P., additional, Mulcahy, D. D., additional, Munk, H., additional, Nelles, A., additional, Norden, M. J., additional, Orru, E., additional, Pandey-Pommier, M., additional, Pizzo, R., additional, Polatidis, A. G., additional, Reich, W., additional, Renting, A., additional, Röttgering, H., additional, Schwarz, D., additional, Shulevski, A., additional, Smirnov, O., additional, Stappers, B. W., additional, Steinmetz, M., additional, Swinbank, J., additional, Tagger, M., additional, Tang, Y., additional, Tasse, C., additional, ter Veen, S., additional, Thoudam, S., additional, Toribio, C., additional, Vocks, C., additional, Wise, M. W., additional, Wucknitz, O., additional, and Zarka, P., additional
Published: 2015
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119. Low-k interconnect stack with multi-layer air gap and tri-metal-insulator-metal capacitors for 14nm high volume manufacturing

Author: Fischer, K., primary, Agostinelli, M., additional, Allen, C., additional, Bahr, D., additional, Bost, M., additional, Charvat, P., additional, Chikarmane, V., additional, Fu, Q., additional, Ganpule, C., additional, Haran, M., additional, Heckscher, M., additional, Hiramatsu, H., additional, Hwang, E., additional, Jain, P., additional, Jin, I., additional, Kasim, R., additional, Kosaraju, S., additional, Lee, K. S., additional, Liu, H., additional, McFadden, R., additional, Nigam, S., additional, Patel, R., additional, Pelto, C., additional, Plekhanov, P., additional, Prince, M., additional, Puls, C., additional, Rajamani, S., additional, Rao, D., additional, Reese, P., additional, Rosenbaum, A., additional, Sivakumar, S., additional, Song, B., additional, Uncuer, M., additional, Williams, S., additional, Yang, M., additional, Yashar, P., additional, and Natarajan, S., additional
Published: 2015
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120. Probing Atmospheric Electric Fields in Thunderstorms through Radio Emission from Cosmic-Ray-Induced Air Showers

Author: Schellart, P., primary, Trinh, T. N. G., additional, Buitink, S., additional, Corstanje, A., additional, Enriquez, J. E., additional, Falcke, H., additional, Hörandel, J. R., additional, Nelles, A., additional, Rachen, J. P., additional, Rossetto, L., additional, Scholten, O., additional, ter Veen, S., additional, Thoudam, S., additional, Ebert, U., additional, Koehn, C., additional, Rutjes, C., additional, Alexov, A., additional, Anderson, J. M., additional, Avruch, I. M., additional, Bentum, M. J., additional, Bernardi, G., additional, Best, P., additional, Bonafede, A., additional, Breitling, F., additional, Broderick, J. W., additional, Brüggen, M., additional, Butcher, H. R., additional, Ciardi, B., additional, de Geus, E., additional, de Vos, M., additional, Duscha, S., additional, Eislöffel, J., additional, Fallows, R. A., additional, Frieswijk, W., additional, Garrett, M. A., additional, Grießmeier, J., additional, Gunst, A. W., additional, Heald, G., additional, Hessels, J. W. T., additional, Hoeft, M., additional, Holties, H. A., additional, Juette, E., additional, Kondratiev, V. I., additional, Kuniyoshi, M., additional, Kuper, G., additional, Mann, G., additional, McFadden, R., additional, McKay-Bukowski, D., additional, McKean, J. P., additional, Mevius, M., additional, Moldon, J., additional, Norden, M. J., additional, Orru, E., additional, Paas, H., additional, Pandey-Pommier, M., additional, Pizzo, R., additional, Polatidis, A. G., additional, Reich, W., additional, Röttgering, H., additional, Scaife, A. M. M., additional, Schwarz, D. J., additional, Serylak, M., additional, Smirnov, O., additional, Steinmetz, M., additional, Swinbank, J., additional, Tagger, M., additional, Tasse, C., additional, Toribio, M. C., additional, van Weeren, R. J., additional, Vermeulen, R., additional, Vocks, C., additional, Wise, M. W., additional, Wucknitz, O., additional, and Zarka, P., additional
Published: 2015
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121. Limit on the ultrahigh-energy neutrino flux from lunar observations with the Parkes radio telescope

Author: Bray, J. D., primary, Ekers, R. D., additional, Roberts, P., additional, Reynolds, J. E., additional, James, C. W., additional, Phillips, C. J., additional, Protheroe, R. J., additional, McFadden, R. A., additional, and Aartsen, M. G., additional
Published: 2015
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122. LOFAR sparse image reconstruction

Author: Garsden, H., primary, Girard, J. N., additional, Starck, J. L., additional, Corbel, S., additional, Tasse, C., additional, Woiselle, A., additional, McKean, J. P., additional, van Amesfoort, A. S., additional, Anderson, J., additional, Avruch, I. M., additional, Beck, R., additional, Bentum, M. J., additional, Best, P., additional, Breitling, F., additional, Broderick, J., additional, Brüggen, M., additional, Butcher, H. R., additional, Ciardi, B., additional, de Gasperin, F., additional, de Geus, E., additional, de Vos, M., additional, Duscha, S., additional, Eislöffel, J., additional, Engels, D., additional, Falcke, H., additional, Fallows, R. A., additional, Fender, R., additional, Ferrari, C., additional, Frieswijk, W., additional, Garrett, M. A., additional, Grießmeier, J., additional, Gunst, A. W., additional, Hassall, T. E., additional, Heald, G., additional, Hoeft, M., additional, Hörandel, J., additional, van der Horst, A., additional, Juette, E., additional, Karastergiou, A., additional, Kondratiev, V. I., additional, Kramer, M., additional, Kuniyoshi, M., additional, Kuper, G., additional, Mann, G., additional, Markoff, S., additional, McFadden, R., additional, McKay-Bukowski, D., additional, Mulcahy, D. D., additional, Munk, H., additional, Norden, M. J., additional, Orru, E., additional, Paas, H., additional, Pandey-Pommier, M., additional, Pandey, V. N., additional, Pietka, G., additional, Pizzo, R., additional, Polatidis, A. G., additional, Renting, A., additional, Röttgering, H., additional, Rowlinson, A., additional, Schwarz, D., additional, Sluman, J., additional, Smirnov, O., additional, Stappers, B. W., additional, Steinmetz, M., additional, Stewart, A., additional, Swinbank, J., additional, Tagger, M., additional, Tang, Y., additional, Thoudam, S., additional, Toribio, C., additional, Vermeulen, R., additional, Vocks, C., additional, van Weeren, R. J., additional, Wijnholds, S. J., additional, Wise, M. W., additional, Wucknitz, O., additional, Yatawatta, S., additional, Zarka, P., additional, and Zensus, A., additional
Published: 2015
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123. Parental and medical over-administration of acetaminophen causing lethal hepatotoxicity in a 10-year-old.

Author: Nadir, A, Mcfadden, R, Griggs, J, Wright, H, Fagiuoli, S, Van Thiel, D, Nadir A, McFadden R, Griggs J, Wright HI, Fagiuoli S, Van Thiel DH., Nadir, A, Mcfadden, R, Griggs, J, Wright, H, Fagiuoli, S, Van Thiel, D, Nadir A, McFadden R, Griggs J, Wright HI, Fagiuoli S, and Van Thiel DH.
Abstract: A 10-year-old girl with acute influenza B virus disease was given repetitive doses of acetaminophen by her mother to reduce the child's fever. When finally seen by trained medical personnel, the child was experiencing abdominal pain, nausea, and vomiting, which are classic signs of acetaminophen hepatotoxicity. Despite these findings, the child was given additional acetaminophen and experienced lethal hepatotoxicity.
Published: 1994

124. The Lunar Cherenkov Technique: From Parkes Onwards

Author: Clancy James, Ekers, R. D., Mcfadden, R. A., and Protheroe, R. J.
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Physics::Space Physics, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics
Abstract: The lunar Cherenkov technique, which aims to detect the coherent Cherenkov radiation produced when UHE particles interact in the lunar regolith, was first attempted with the Parkes radio-telescope in 1995, though the theory was not sufficiently developed at this time to calculate a limit on the UHE neutrino flux from the non-observation. Since then, the technique has evolved to include experiments utilising lower frequencies, wider bandwidths, and entire arrays of antenna. We develop a simulation to analyse the full range of experiments, and calculate the UHE neutrino flux limit from the Parkes experiment, including the directional dependence. Our results suggest a methodology for planning future observations, and demonstrate how to utilise all available information on the nature of radio pulses from the Moon for the detection of UHE particles., 5 pages, 5 figures; Proceedings from 30th ICRC, Merida, Mexico, 2007 (4 pages in proceedings)
Published: 2007

125. Structure theorems for inverse semigroups

Author: McFadden, R., primary
Published: 1975
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126. PARTIALLY ORDERED SEMIGROUPS AS SEMIGROUPS

Author: McFadden, R., primary
Published: 1980
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127. The United States Coast Guard’s Remote Aerial Sensing Program

Author: McFadden, R. L., primary, Voyik, G. S., additional, and Plage, W. E., additional
Published: 1984
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128. Acquired Paradoxic Septal Motion Following Successful Coronary Artery Bypass Surgery

Author: Adams, N., primary, McFadden, R. B., additional, Chambers, J., additional, Cornish, D., additional, and Vogel, J. K., additional
Published: 1975
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129. Awareness of Medical Fitness to Drive Guidelines among Occupational Physicians and Psychiatrists.

Author: Ryan, M., Mcfadden, R., Gilvarry, E., Loane, R., Whelan, D., and O'Neil, D.
Published: 2017

130. Parental and medical over-administration of acetaminophen causing lethal hepatotoxicity in a 10-year-old

Author: Nadir A, McFadden R, Griggs J, Wright HI, Fagiuoli S, Van Thiel DH., Nadir, A, Mcfadden, R, Griggs, J, Wright, H, Fagiuoli, S, and Van Thiel, D
Subjects: paracetamol, Liver Disease, Overdose, article, fatality, Fatal Outcome, intoxication, case report, Humans, chemically induced disorder, Female, human, Chemical and Drug Induced Liver Injury, Drug Overdose, Child, Acetaminophen
Abstract: A 10-year-old girl with acute influenza B virus disease was given repetitive doses of acetaminophen by her mother to reduce the child's fever. When finally seen by trained medical personnel, the child was experiencing abdominal pain, nausea, and vomiting, which are classic signs of acetaminophen hepatotoxicity. Despite these findings, the child was given additional acetaminophen and experienced lethal hepatotoxicity.
Published: 1994

131. The shape of the radio wavefront of extensive air showers as measured with LOFAR

Author: Corstanje, A., primary, Schellart, P., additional, Nelles, A., additional, Buitink, S., additional, Enriquez, J.E., additional, Falcke, H., additional, Frieswijk, W., additional, Hörandel, J.R., additional, Krause, M., additional, Rachen, J.P., additional, Scholten, O., additional, ter Veen, S., additional, Thoudam, S., additional, Trinh, T.N.G., additional, van den Akker, M., additional, Alexov, A., additional, Anderson, J., additional, Avruch, I.M., additional, Bell, M.E., additional, Bentum, M.J., additional, Bernardi, G., additional, Best, P., additional, Bonafede, A., additional, Breitling, F., additional, Broderick, J., additional, Brüggen, M., additional, Butcher, H.R., additional, Ciardi, B., additional, de Gasperin, F., additional, de Geus, E., additional, de Vos, M., additional, Duscha, S., additional, Eislöffel, J., additional, Engels, D., additional, Fallows, R.A., additional, Ferrari, C., additional, Garrett, M.A., additional, Grießmeier, J., additional, Gunst, A.W., additional, Hamaker, J.P., additional, Hoeft, M., additional, Horneffer, A., additional, Iacobelli, M., additional, Juette, E., additional, Karastergiou, A., additional, Kohler, J., additional, Kondratiev, V.I., additional, Kuniyoshi, M., additional, Kuper, G., additional, Maat, P., additional, Mann, G., additional, McFadden, R., additional, McKay-Bukowski, D., additional, Mevius, M., additional, Munk, H., additional, Norden, M.J., additional, Orru, E., additional, Paas, H., additional, Pandey-Pommier, M., additional, Pandey, V.N., additional, Pizzo, R., additional, Polatidis, A.G., additional, Reich, W., additional, Röttgering, H., additional, Scaife, A.M.M., additional, Schwarz, D., additional, Smirnov, O., additional, Stewart, A., additional, Steinmetz, M., additional, Swinbank, J., additional, Tagger, M., additional, Tang, Y., additional, Tasse, C., additional, Toribio, C., additional, Vermeulen, R., additional, Vocks, C., additional, van Weeren, R.J., additional, Wijnholds, S.J., additional, Wucknitz, O., additional, Yatawatta, S., additional, and Zarka, P., additional
Published: 2015
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132. The LOFAR long baseline snapshot calibrator survey

Author: Moldón, J., primary, Deller, A. T., additional, Wucknitz, O., additional, Jackson, N., additional, Drabent, A., additional, Carozzi, T., additional, Conway, J., additional, Kapińska, A. D., additional, McKean, J. P., additional, Morabito, L., additional, Varenius, E., additional, Zarka, P., additional, Anderson, J., additional, Asgekar, A., additional, Avruch, I. M., additional, Bell, M. E., additional, Bentum, M. J., additional, Bernardi, G., additional, Best, P., additional, Bîrzan, L., additional, Bregman, J., additional, Breitling, F., additional, Broderick, J. W., additional, Brüggen, M., additional, Butcher, H. R., additional, Carbone, D., additional, Ciardi, B., additional, de Gasperin, F., additional, de Geus, E., additional, Duscha, S., additional, Eislöffel, J., additional, Engels, D., additional, Falcke, H., additional, Fallows, R. A., additional, Fender, R., additional, Ferrari, C., additional, Frieswijk, W., additional, Garrett, M. A., additional, Grießmeier, J., additional, Gunst, A. W., additional, Hamaker, J. P., additional, Hassall, T. E., additional, Heald, G., additional, Hoeft, M., additional, Juette, E., additional, Karastergiou, A., additional, Kondratiev, V. I., additional, Kramer, M., additional, Kuniyoshi, M., additional, Kuper, G., additional, Maat, P., additional, Mann, G., additional, Markoff, S., additional, McFadden, R., additional, McKay-Bukowski, D., additional, Morganti, R., additional, Munk, H., additional, Norden, M. J., additional, Offringa, A. R., additional, Orru, E., additional, Paas, H., additional, Pandey-Pommier, M., additional, Pizzo, R., additional, Polatidis, A. G., additional, Reich, W., additional, Röttgering, H., additional, Rowlinson, A., additional, Scaife, A. M. M., additional, Schwarz, D., additional, Sluman, J., additional, Smirnov, O., additional, Stappers, B. W., additional, Steinmetz, M., additional, Tagger, M., additional, Tang, Y., additional, Tasse, C., additional, Thoudam, S., additional, Toribio, M. C., additional, Vermeulen, R., additional, Vocks, C., additional, van Weeren, R. J., additional, White, S., additional, Wise, M. W., additional, Yatawatta, S., additional, and Zensus, A., additional
Published: 2015
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133. B-NMR of 8Li+ in rutile TiO2

Author: McFadden, R M. L, Cortie, David L, Arseneau, D J, Buck, T, Chen, C-C, Dehn, M H, Dunsiger, S, Kiefl, R F, Levy, C D. P, Li, C D, Morris, G D, Pearson, M R, Samuelis, D, Xiao, J, Maier, J, MacFarlane, W A, McFadden, R M. L, Cortie, David L, Arseneau, D J, Buck, T, Chen, C-C, Dehn, M H, Dunsiger, S, Kiefl, R F, Levy, C D. P, Li, C D, Morris, G D, Pearson, M R, Samuelis, D, Xiao, J, Maier, J, and MacFarlane, W A
Abstract: We report preliminary low-energy B-NMR measurements of 8Li+ implanted in single crystal rutile TiO2 at an applied field of 6.55 T and 300 K. We observe a broad 12 kHz wide quadrupole split resonance with unresolved features and a sharp component at the Larmor frequency. The line broadening may be caused by overlapping multi-quantum transitions or motion of 8Li+ on the scale of its lifetime (1.21 s). We also find spin-lattice relaxation that is relatively fast compared to other wide band gap insulators. The origin of this fast relaxation is also likely quadrupolar and may be due to anisotropic 8Li+ diffusion.
Published: 2014

134. A lunar radio experiment with the Parkes radio telescope for the LUNASKA project

Author: Bray, J. D., Ekers, R. D., Roberts, P., Reynolds, J. E., James, C. W., Phillips, C. J., Protheroe, R. J., McFadden, R. A., Aartsen, M. G., Bray, J. D., Ekers, R. D., Roberts, P., Reynolds, J. E., James, C. W., Phillips, C. J., Protheroe, R. J., McFadden, R. A., and Aartsen, M. G.
Abstract: We describe an experiment using the Parkes radio telescope in the 1.2-1.5 GHz frequency range as part of the LUNASKA project, to search for nanosecond-scale pulses from particle cascades in the Moon, which may be triggered by ultra-high-energy astroparticles. Through the combination of a highly sensitive multi-beam radio receiver, a purpose-built backend and sophisticated signal-processing techniques, we achieve sensitivity to radio pulses with a threshold electric field strength of 0.0053 $\mu$V/m/MHz, lower than previous experiments by a factor of three. We observe no pulses in excess of this threshold in observations with an effective duration of 127 hours. The techniques we employ, including compensating for the phase, dispersion and spectrum of the expected pulse, are relevant for future lunar radio experiments., Comment: Accepted by Astroparticle Physics; 23 pages, 17 figures, 3 tables
Published: 2014
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135. The LOFAR Pilot Surveys for Pulsars and Fast Radio Transients

Author: 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., 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., and Zensus, A.
Abstract: 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, the LOFAR Pilot Pulsar Survey (LPPS), observed a large fraction of the northern sky, ~1.4 x 10^4 sq. deg, with 1-hr dwell times. Each observation covered ~75 sq. deg using 7 independent fields formed by incoherently summing the high-band antenna fields. The second pilot survey, the LOFAR Tied-Array Survey (LOTAS), spanned ~600 sq. deg, with roughly a 5-fold increase in sensitivity compared with LPPS. Using a coherent sum of the 6 LOFAR "Superterp" stations, we formed 19 tied-array beams, together covering 4 sq. deg per pointing. From LPPS we derive a limit on the occurrence, at 142 MHz, of dispersed radio bursts of < 150 /day/sky, for bursts brighter than S > 107 Jy for the narrowest searched burst duration of 0.66 ms. In LPPS, we re-detected 65 previously known pulsars. LOTAS discovered two pulsars, the first with LOFAR or any digital aperture array. LOTAS also re-detected 27 previously known pulsars. These pilot studies show that LOFAR can efficiently carry out all-sky surveys for pulsars and fast transients, and they set the stage for further surveying efforts using LOFAR and the planned low-frequency component of the Square Kilometer Array., Comment: 18 pages, 10 figures, accepted for A&A
Published: 2014
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136. LOFAR Sparse Image Reconstruction

Author: Garsden, H., Girard, J. N., Starck, J. L., Corbel, S., Tasse, C., Woiselle, A., McKean, J. P., van Amesfoort, A. S., Anderson, J., Avruch, I. M., Beck, R., Bentum, M. J., Best, P., Breitling, F., Broderick, J., Brüggen, M., Butcher, H. R., Ciardi, B., de Gasperin, F., de Geus, E., de Vos, M., Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Griessmeier, J., Gunst, A. W., Hassall, T. E., Heald, G., Hoeft, M., Hörandel, J., van der Horst, A., Juette, E., Karastergiou, A., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Kuper, G., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., Mulcahy, D. D., Munk, H., Norden, M. J., Orru, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pietka, G., Pizzo, R., Polatidis, A. G., Renting, A., Röttgering, H., Rowlinson, A., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tang, Y., Thoudam, S., Toribio, C., Vermeulen, R., vocks, C., van Weeren, R. J., Wijnholds, S. J., Wise, M. W., Wucknitz, O., Yatawatta, S., Zarka, P., Zensus, A., Garsden, H., Girard, J. N., Starck, J. L., Corbel, S., Tasse, C., Woiselle, A., McKean, J. P., van Amesfoort, A. S., Anderson, J., Avruch, I. M., Beck, R., Bentum, M. J., Best, P., Breitling, F., Broderick, J., Brüggen, M., Butcher, H. R., Ciardi, B., de Gasperin, F., de Geus, E., de Vos, M., Duscha, S., Eislöffel, J., Engels, D., Falcke, H., Fallows, R. A., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M. A., Griessmeier, J., Gunst, A. W., Hassall, T. E., Heald, G., Hoeft, M., Hörandel, J., van der Horst, A., Juette, E., Karastergiou, A., Kondratiev, V. I., Kramer, M., Kuniyoshi, M., Kuper, G., Mann, G., Markoff, S., McFadden, R., McKay-Bukowski, D., Mulcahy, D. D., Munk, H., Norden, M. J., Orru, E., Paas, H., Pandey-Pommier, M., Pandey, V. N., Pietka, G., Pizzo, R., Polatidis, A. G., Renting, A., Röttgering, H., Rowlinson, A., Schwarz, D., Sluman, J., Smirnov, O., Stappers, B. W., Steinmetz, M., Stewart, A., Swinbank, J., Tagger, M., Tang, Y., Thoudam, S., Toribio, C., Vermeulen, R., vocks, C., van Weeren, R. J., Wijnholds, S. J., Wise, M. W., Wucknitz, O., Yatawatta, S., Zarka, P., and Zensus, A.
Abstract: Context. The LOw Frequency ARray (LOFAR) radio telescope is a giant digital phased array interferometer with multiple antennas distributed in Europe. It provides discrete sets of Fourier components of the sky brightness. Recovering the original brightness distribution with aperture synthesis forms an inverse problem that can be solved by various deconvolution and minimization methods Aims. Recent papers have established a clear link between the discrete nature of radio interferometry measurement and the "compressed sensing" (CS) theory, which supports sparse reconstruction methods to form an image from the measured visibilities. Empowered by proximal theory, CS offers a sound framework for efficient global minimization and sparse data representation using fast algorithms. Combined with instrumental direction-dependent effects (DDE) in the scope of a real instrument, we developed and validated a new method based on this framework Methods. We implemented a sparse reconstruction method in the standard LOFAR imaging tool and compared the photometric and resolution performance of this new imager with that of CLEAN-based methods (CLEAN and MS-CLEAN) with simulated and real LOFAR data Results. We show that i) sparse reconstruction performs as well as CLEAN in recovering the flux of point sources; ii) performs much better on extended objects (the root mean square error is reduced by a factor of up to 10); and iii) provides a solution with an effective angular resolution 2-3 times better than the CLEAN images. Conclusions. Sparse recovery gives a correct photometry on high dynamic and wide-field images and improved realistic structures of extended sources (of simulated and real LOFAR datasets). This sparse reconstruction method is compatible with modern interferometric imagers that handle DDE corrections (A- and W-projections) required for current and future instruments such as LOFAR and SKA, Comment: Published in A&A, 19 pages, 9 figures
Published: 2014
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137. 8Li+ B-NMR in the cubic insulator MgO

Author: MacFarlane, W A, Parolin, T J, Cortie, David L, Chow, K H, Hossain, M D, Kiefl, R F, Levy, C D. P, McFadden, R M. L, Morris, G D, Pearson, M R, Saadaoui, H, Salman, Z, Song, Q, Wang, D, MacFarlane, W A, Parolin, T J, Cortie, David L, Chow, K H, Hossain, M D, Kiefl, R F, Levy, C D. P, McFadden, R M. L, Morris, G D, Pearson, M R, Saadaoui, H, Salman, Z, Song, Q, and Wang, D
Abstract: We present extensive high magnetic field B-NMR measurements of 8Li+ implanted in single crystals of MgO. The narrow resonance, consistent with a cubic 8Li+ site, likely the tetrahedral interstitital, is used routinely as a reference for shift measurements. We show the intrinsic line width is on the order of 200 Hz, allowing a frequency determination to an accuracy of a few Hz. We find no implantation energy dependence of the resonance within a few ppm, but there is evidence of slow spin dynamics in hole-burning measurements. The spin lattice relaxation is slow. The temperature dependence reveals interesting changes at low temperature whose origin remains uncertain.
Published: 2014

138. B-NMR study of a buried Mn &-doped layer in a silicon host

Author: Cortie, David L, Buck, T, McFadden, R M. L, Xiao, J, Levy, C D. P, Dehn, M H, Pearson, M R, Morris, G D, Dunsiger, S, Kiefl, R F, Rueb, F, Fuhrer, A, MacFarlane, W A, Cortie, David L, Buck, T, McFadden, R M. L, Xiao, J, Levy, C D. P, Dehn, M H, Pearson, M R, Morris, G D, Dunsiger, S, Kiefl, R F, Rueb, F, Fuhrer, A, and MacFarlane, W A
Abstract: Low temperature growth methods were used to encapsulate a buried Mn ¿-doping layer into a silicon host. A ¿-NMR investigation was performed of the magnetic properties in the temperature range 10-300 K using spin-polarized 8Li+. A depth-dependent broadening and shift of the NMR resonance was detected that is consistent with internal fields distributed at depths of 10-30 nm beneath the surface. At low temperatures, a negative relative shift occurred and the resonance was significantly broadened. At 300 K the line-shape could be described by a single Gaussian line, however, at 10 K the line is best approximated by a two component Lorentzian shape consisting of a broad and narrow component as anticipated for a diluted magnetic alloy. The overall magnitude of the resonance shift at both temperatures is small suggesting a weak interaction between the 8Li+ and the magnetic Mn environment.
Published: 2014

139. The LOFAR pilot surveys for pulsars and fast radio transients

Author: Coenen, T., Van Leeuwen, J., Hessels, J., Stappers, B., Kondratiev, V., Alexov, A., Breton, R., Bilous, A., Cooper, S., Falcke, H., Fallows, R., Gajjar, V., Grießmeier, J., Hassall, T., Karastergiou, A., Keane, E., Kramer, M., Kuniyoshi, M., Noutsos, A., Oslowski, S., Pilia, M., Serylak, M., Schrijvers, C., Sobey, Charlotte, Ter Veen, S., Verbiest, J., Weltevrede, P., Wijnholds, S., Zagkouris, K., Van Amesfoort, A., Anderson, J., Asgekar, A., Avruch, I., Bell, M., Bentum, M., Bernardi, G., Best, P., Bonafede, A., Breitling, F., Broderick, J., Brüggen, M., Butcher, H., Ciardi, B., Corstanje, A., Deller, A., Duscha, S., Eislöffel, J., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M., De Gasperin, F., De Geus, E., Gunst, A., Hamaker, J., Heald, G., Hoeft, M., Van Der Horst, A., Juette, E., Kuper, G., Law, C., Mann, G., McFadden, R., McKay-Bukowski, D., McKean, J., Munk, H., Orru, E., Paas, H., Pandey-Pommier, M., Polatidis, A., Reich, W., Renting, A., Röttgering, H., Rowlinson, A., Scaife, A., Schwarz, D., Sluman, J., Smirnov, O., Swinbank, J., Coenen, T., Van Leeuwen, J., Hessels, J., Stappers, B., Kondratiev, V., Alexov, A., Breton, R., Bilous, A., Cooper, S., Falcke, H., Fallows, R., Gajjar, V., Grießmeier, J., Hassall, T., Karastergiou, A., Keane, E., Kramer, M., Kuniyoshi, M., Noutsos, A., Oslowski, S., Pilia, M., Serylak, M., Schrijvers, C., Sobey, Charlotte, Ter Veen, S., Verbiest, J., Weltevrede, P., Wijnholds, S., Zagkouris, K., Van Amesfoort, A., Anderson, J., Asgekar, A., Avruch, I., Bell, M., Bentum, M., Bernardi, G., Best, P., Bonafede, A., Breitling, F., Broderick, J., Brüggen, M., Butcher, H., Ciardi, B., Corstanje, A., Deller, A., Duscha, S., Eislöffel, J., Fender, R., Ferrari, C., Frieswijk, W., Garrett, M., De Gasperin, F., De Geus, E., Gunst, A., Hamaker, J., Heald, G., Hoeft, M., Van Der Horst, A., Juette, E., Kuper, G., Law, C., Mann, G., McFadden, R., McKay-Bukowski, D., McKean, J., Munk, H., Orru, E., Paas, H., Pandey-Pommier, M., Polatidis, A., Reich, W., Renting, A., Röttgering, H., Rowlinson, A., Scaife, A., Schwarz, D., Sluman, J., Smirnov, O., and Swinbank, J.
Abstract: © 2014 ESO .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, the LOFAR Pilot Pulsar Survey (LPPS), observed a large fraction of the northern sky, ~ 1.4 × 104 deg2, with 1 h dwell times. Each observation covered ~75 deg2 using 7 independent fields formed by incoherently summing the high-band antenna fields. The second pilot survey, the LOFAR Tied-Array Survey (LOTAS), spanned ~600 deg2, with roughly a 5-fold increase in sensitivity compared with LPPS. Using a coherent sum of the 6 LOFAR "Superterp" stations, we formed 19 tied-array beams, together covering 4 deg2 per pointing. From LPPS we derive a limit on the occurrence, at 142 MHz, of dispersed radio bursts of < 150 day-1 sky-1, for bursts brighter than S> 107 Jy for the narrowest searched burst duration of 0.66 ms. In LPPS, we re-detected 65 previously known pulsars. LOTAS discovered two pulsars, the first with LOFAR or any digital aperture array. LOTAS also re-detected 27 previously known pulsars. These pilot studies show that LOFAR can efficiently carry out all-sky surveys for pulsars and fast transients, and they set the stage for further surveying efforts using LOFAR and the planned low-frequency component of the Square Kilometer Array.
Published: 2014

140. Surgical Treatment in Unstable Angina

Author: Vogel, John H. K., primary, McFadden, R. Bruce, additional, Love, Jack, additional, and Jahnke, Edward, additional
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141. Objective Evaluation of Bypass Surgery in Patients with Acute Coronary Artery Disease

Author: Vogel, John H. K., primary, McFadden, R. Bruce, additional, Cornish, David, additional, and Jahnke, Edward J., additional
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142. Lack of Revascularization with Low Fat Diet and Exercise

Author: Vogel, John H. K., primary, McFadden, R. Bruce, additional, and Fisher, George U., additional
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143. Spontaneous Closure of Residual Ventricular Septal Defect Following Surgical Repair of Ventricular Septal Defect Complicating Acute Myocardial Infarction

Author: Vogel, John H.K., primary, McFadden, R. Bruce, additional, Fisher, George U., additional, and Jahnke, Edward J., additional
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144. Natural and Unnatural History of Acute Coronary Artery Disease

Author: McFadden, R. B., primary, Jahnke, E. J., additional, and Vogel, J. H. K., additional
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145. Emergency Myocardial Revascularization in Acute Coronary Artery Disease

Author: Vogel, J. H. K., primary, McFadden, R. B., additional, Love, J. W., additional, and Jahnke, E. J., additional
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146. β-NMR of 8Li+ in rutile TiO2

Author: McFadden, R M L, primary, Cortie, D L, additional, Arseneau, D J, additional, Buck, T J, additional, Chen, C-C, additional, Dehn, M H, additional, Dunsiger, S R, additional, Kiefl, R F, additional, Levy, C D P, additional, Li, C, additional, Morris, G D, additional, Pearson, M R, additional, Samuelis, D, additional, Xiao, J, additional, Maier, J, additional, and MacFarlane, W A, additional
Published: 2014
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147. 8Li+β-NMR in the Cubic Insulator MgO

Author: MacFarlane, W A, primary, Parolin, T J, additional, Cortie, D L, additional, Chow, K H, additional, Hossain, M D, additional, Kiefl, R F, additional, Levy, C D P, additional, McFadden, R M L, additional, Morris, G D, additional, Pearson, M R, additional, Saadaoui, H, additional, Salman, Z, additional, Song, Q, additional, and Wang, D, additional
Published: 2014
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148. β-NMR Study of a buried Mn δ-doped layer in a silicon host

Author: Cortie, D, primary, Buck, T, additional, McFadden, R M L, additional, Xiao, J, additional, Levy, C D P, additional, Dehn, M, additional, Pearson, M, additional, Morris, G D, additional, Dunsiger, S R, additional, Kiefl, R F, additional, Rueß, F J, additional, Fuhrer, A, additional, and MacFarlane, W A, additional
Published: 2014
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149. The LOFAR pilot surveys for pulsars and fast radio transients

Author: Coenen, Thijs, primary, van Leeuwen, Joeri, additional, Hessels, Jason W. T., additional, Stappers, Ben W., additional, Kondratiev, Vladislav I., additional, Alexov, A., additional, Breton, R. P., additional, Bilous, A., additional, Cooper, S., additional, Falcke, H., additional, Fallows, R. A., additional, Gajjar, V., additional, Grießmeier, J.-M., additional, Hassall, T. E., additional, Karastergiou, A., additional, Keane, E. F., additional, Kramer, M., additional, Kuniyoshi, M., additional, Noutsos, A., additional, Osłowski, S., additional, Pilia, M., additional, Serylak, M., additional, Schrijvers, C., additional, Sobey, C., additional, ter Veen, S., additional, Verbiest, J., additional, Weltevrede, P., additional, Wijnholds, S., additional, Zagkouris, K., additional, van Amesfoort, A. S., additional, Anderson, J., additional, Asgekar, A., additional, Avruch, I. M., additional, Bell, M. E., additional, Bentum, M. J., additional, Bernardi, G., additional, Best, P., additional, Bonafede, A., additional, Breitling, F., additional, Broderick, J., additional, Brüggen, M., additional, Butcher, H. R., additional, Ciardi, B., additional, Corstanje, A., additional, Deller, A., additional, Duscha, S., additional, Eislöffel, J., additional, Fender, R., additional, Ferrari, C., additional, Frieswijk, W., additional, Garrett, M. A., additional, de Gasperin, F., additional, de Geus, E., additional, Gunst, A. W., additional, Hamaker, J. P., additional, Heald, G., additional, Hoeft, M., additional, van der Horst, A., additional, Juette, E., additional, Kuper, G., additional, Law, C., additional, Mann, G., additional, McFadden, R., additional, McKay-Bukowski, D., additional, McKean, J. P., additional, Munk, H., additional, Orru, E., additional, Paas, H., additional, Pandey-Pommier, M., additional, Polatidis, A. G., additional, Reich, W., additional, Renting, A., additional, Röttgering, H., additional, Rowlinson, A., additional, Scaife, A. M. M., additional, Schwarz, D., additional, Sluman, J., additional, Smirnov, O., additional, Swinbank, J., additional, Tagger, M., additional, Tang, Y., additional, Tasse, C., additional, Thoudam, S., additional, Toribio, C., additional, Vermeulen, R., additional, Vocks, C., additional, van Weeren, R. J., additional, Wucknitz, O., additional, Zarka, P., additional, and Zensus, A., additional
Published: 2014
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150. Functional Status After Liver Transplantation in Patients After Sharing MELD Scores ≥35.

Author: Boktour, M., primary, Monsour, H., additional, Asham, E., additional, Victor, D., additional, McFadden, R., additional, Podder, H., additional, Gordon-Burroughs, S., additional, Saharia, A., additional, Gaber, A., additional, and Ghobrial, R., additional
Published: 2014
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