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95 results on '"Bähren L"'

1. Improved absolute calibration of LOPES measurements and its impact on the comparison with REAS 3.11 and CoREAS simulations

Author

Apel, W.D., Arteaga-Velázquez, J.C., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Cantoni, E., Chiavassa, A., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Fuchs, B., Gemmeke, H., Grupen, C., Haungs, A., Heck, D., Hiller, R., Hörandel, J.R., Horneffer, A., Huber, D., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Krömer, O., Kuijpers, J., Link, K., Łuczak, P., Ludwig, M., Mathes, H.J., Melissas, M., Morello, C., Nehls, S., Oehlschläger, J., Palmieri, N., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Rühle, C., Saftoiu, A., Schieler, H., Schmidt, A., Schoo, S., Schröder, F.G., Sima, O., Toma, G., Trinchero, G.C., Weindl, A., Wochele, J., Zabierowski, J., and Zensus, J.A.

Published
2016
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2. Comparing LOPES measurements of air-shower radio emission with REAS 3.11 and CoREAS simulations

Author

Apel, W.D., Arteaga-Velázquez, J.C., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Cantoni, E., Chiavassa, A., Daumiller, K., de Souza, V., Pierro, F. Di, Doll, P., Engel, R., Falcke, H., Fuchs, B., Fuhrmann, D., Gemmeke, H., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huber, D., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Krömer, O., Kuijpers, J., Link, K., Łuczak, P., Ludwig, M., Mathes, H.J., Melissas, M., Morello, C., Oehlschläger, J., Palmieri, N., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Rühle, C., Saftoiu, A., Schieler, H., Schmidt, A., Schröder, F.G., Sima, O., Toma, G., Trinchero, G.C., Weindl, A., Wochele, J., Zabierowski, J., and Zensus, J.A.

Published
2013
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3. LOPES-3D: An antenna array for full signal detection of air-shower radio emission

Author

Apel, W.D., Arteaga, J.C., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Buchholz, P., Cantoni, E., Chiavassa, A., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Finger, M., Fuchs, B., Fuhrmann, D., Gemmeke, H., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huber, D., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Krömer, O., Kuijpers, J., Link, K., Łuczak, P., Ludwig, M., Mathes, H.J., Melissas, M., Morello, C., Oehlschläger, J., Palmieri, N., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Rühle, C., Saftoiu, A., Schieler, H., Schmidt, A., Schröder, F.G., Sima, O., Toma, G., Trinchero, G.C., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2012
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4. On noise treatment in radio measurements of cosmic ray air showers

Author

Schröder, F.G., Apel, W.D., Arteaga, J.C., Asch, T., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Daumiller, K., de Souza, V., Doll, P., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huber, D., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Krömer, O., Kuijpers, J., Lafebre, S., Link, K., łuczak, P., Ludwig, M., Mathes, H.J., Melissas, M., Morello, C., Nehls, S., Oehlschläger, J., Palmieri, N., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Rühle, C., Saftoiu, A., Schieler, H., Schmidt, A., Sima, O., Toma, G., Trinchero, G.C., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2012
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5. Investigations of the radio signal of inclined showers with LOPES

Author

Saftoiu, A., Apel, W.D., Arteaga, J.C., Asch, T., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Daumiller, K., de Souza, V., Doll, P., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huber, D., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Krömer, O., Kuijpers, J., Lafebre, S., Link, K., łuczak, P., Ludwig, M., Mathes, H.J., Melissas, M., Morello, C., Nehls, S., Oehlschläger, J., Palmieri, N., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Rühle, C., Schieler, H., Schmidt, A., Schröder, F.G., Sima, O., Toma, G., Trinchero, G.C., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2012
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6. The LOPES experiment—Recent results, status and perspectives

Author

Huege, T., Apel, W.D., Arteaga, J.C., Asch, T., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Daumiller, K., de Souza, V., Doll, P., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huber, D., Isar, P.G., Kampert, K.-H., Kang, D., Krömer, O., Kuijpers, J., Lafebre, S., Link, K., łuczak, P., Ludwig, M., Mathes, H.J., Melissas, M., Morello, C., Nehls, S., Oehlschläger, J., Palmieri, N., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Rühle, C., Saftoiu, A., Schieler, H., Schmidt, A., Schröder, F.G., Sima, O., Toma, G., Trinchero, G.C., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2012
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7. The LOPES experiment

Author

Link, Katrin, Apel, W.D., Arteaga, J.C., Asch, T., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Daumiller, K., de Souza, V., Doll, P., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huber, D., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Krömer, O., Kuijpers, J., Lafebre, S., Łuczak, P., Ludwig, M., Mathes, H.J., Melissas, M., Morello, C., Nehls, S., Oehlschläger, J., Palmieri, N., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Rühle, C., Saftoiu, A., Schieler, H., Schmidt, A., Schröder, F.G., Sima, O., Toma, G., Trinchero, G.C., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2011
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8. Thunderstorm observations by air-shower radio antenna arrays

Author

Apel, W.D., Arteaga, J.C., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Daumiller, K., de Souza, V., Pierro, F. Di, Doll, P., Ender, M., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huber, D., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Krömer, O., Kuijpers, J., Link, K., Łuczak, P., Ludwig, M., Mathes, H.J., Melissas, M., Morello, C., Nehls, S., Oehlschläger, J., Palmieri, N., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Rühle, C., Saftoiu, A., Schieler, H., Schmidt, A., Schröder, F.G., Sima, O., Toma, G., Trinchero, G.C., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2011
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9. Measurement of radio emission from extensive air showers with LOPES

Author

Hörandel, J.R., Apel, W.D., Arteaga, J.C., Asch, T., Badea, F., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Brüggemann, M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Cossavella, F., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Ender, M., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Ghia, P.L., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Horneffer, A., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Kickelbick, D., Krömer, O., Kuijpers, J., Lafebre, S., Link, K., łuczak, P., Ludwig, M., Mathes, H.J., Mayer, H.J., Melissas, M., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Oehlschläger, J., Over, S., Palmieri, N., Petcu, M., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Saftoiu, A., Schieler, H., Schmidt, A., Schröder, F., Sima, O., Singh, K., Toma, G., Trinchero, G.C., Ulrich, H., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2011
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10. Lateral distribution of the radio signal in extensive air showers measured with LOPES

Author

Apel, W.D., Arteaga, J.C., Asch, T., Badea, A.F., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Brüggemann, M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Cossavella, F., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Ghia, P.L., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Kickelbick, D., Krömer, O., Kuijpers, J., Lafebre, S., Łuczak, P., Ludwig, M., Mathes, H.J., Mayer, H.J., Melissas, M., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Oehlschläger, J., Over, S., Palmieri, N., Petcu, M., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Saftoiu, A., Schieler, H., Schmidt, A., Schröder, F., Sima, O., Singh, K., Toma, G., Trinchero, G.C., Ulrich, H., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2010
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12. Recent results of the LOPES experiment

Author

Haungs, A., Apel, W.D., Arteaga, J.C., Asch, T., Badea, F., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Brüggemann, M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Cossavella, F., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Ender, M., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Ghia, P.L., Glasstetter, R., Grupen, C., Heck, D., Hörandel, J.R., Horneffer, A., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Kickelbick, D., Kolotaev, Y., Krömer, O., Kuijpers, J., Lafebre, S., Link, K., Łuczak, P., Ludwig, M., Mathes, H.J., Mayer, H.J., Melissas, M., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Oehlschläger, J., Over, S., Palmieri, N., Petcu, M., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Saftoiu, A., Schieler, H., Schmidt, A., Schröder, F., Sima, O., Singh, K., Toma, G., Trinchero, G., Ulrich, H., Walkowiak, W., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2009
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14. Recent Results from KASCADE-Grande and LOPES

Author

Kampert, K.-H., Apel, W.D., Arteaga, J.C., Asch, T., Badea, F., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Brüggemann, M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Cossavella, F., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Ender, M., Engel, R., Engler, J., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Ghia, P.L., Gils, H.J., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huege, T., Isar, P.G., Kang, D., Kickelbick, D., Klages, H.O., Kolotaev, Y., Krömer, O., Kuijpers, J., Lafebre, S., Link, K., Łuczak, P., Ludwig, M., Mathes, H.J., Mayer, H.J., Milke, J., Melissas, M., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Oehlschläger, J., Ostapchenko, S., Over, S., Palmieri, N., Petcu, M., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Saftoiu, A., Schieler, H., Schmidt, A., Schröder, F., Sima, O., Singh, K., Stümpert, M., Toma, G., Trinchero, G., Ulrich, H., Walkowiak, W., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2009
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15. Radio emission of energetic cosmic ray air showers: Polarization measurements with LOPES

Author

Isar, P.G., Apel, W.D., Arteaga, J.C., Asch, T., Auffenberg, J., Badea, F., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Brüggemann, M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Cossavella, F., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Ghia, P.L., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huang, X., Huege, T., Kampert, K.-H., Kang, D., Kickelbick, D., Kolotaev, Y., Krömer, O., Kuijpers, J., Lafebre, S., Łuczak, P., Mathes, H.J., Mayer, H.J., Milke, J., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Oehlschläger, J., Over, S., Petcu, M., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Saftoiu, A., Schieler, H., Schmidt, A., Schröder, F., Sima, O., Singh, K., Stümpert, M., Toma, G., Trinchero, G.C., Ulrich, H., Walkowiak, W., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2009
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16. Analysis of inclined showers measured with LOPES

Author

Saftoiu, A., Apel, W.D., Arteaga, J.C., Asch, T., Auffenberg, J., Badea, F., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Brüggemann, M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Cossavella, F., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Ghia, P.L., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Kickelbick, D., Kolotaev, Y., Krömer, O., Kuijpers, J., Lafebre, S., Łuczak, P., Mathes, H.J., Mayer, H.J., Milke, J., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Oehlschläger, J., Over, S., Petcu, M., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Schieler, H., Schmidt, A., Schröder, F., Sima, O., Singh, K., Stümpert, M., Toma, G., Trinchero, G.C., Ulrich, H., Walkowiak, W., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2009
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17. Air shower measurements with the LOPES radio antenna array

Author

Haungs, A., Apel, W.D., Arteaga, J.C., Asch, T., Auffenberg, J., Badea, F., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Brüggemann, M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Cossavella, F., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Ghia, P.L., Glasstetter, R., Grupen, C., Heck, D., Hörandel, J.R., Horneffer, A., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Kickelbick, D., Kolotaev, Y., Krömer, O., Kuijpers, J., Lafebre, S., Łuczak, P., Mathes, H.J., Mayer, H.J., Milke, J., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Oehlschläger, J., Over, S., Petcu, M., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Saftoiu, A., Schieler, H., Schmidt, A., Schröder, F., Sima, O., Singh, K., Stümpert, M., Toma, G., Trinchero, G.C., Ulrich, H., Walkowiak, W., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2009
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19. Cosmic Ray Air Shower Detection with LOPES

Author

Haungs, A., Apel, W.D., Arteaga, J.C., Asch, T., Badea, A.F., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Brüggemann, M., Buchholz, P., Buitink, S., Butcher, H., Chiavassa, A., Cossavella, F., Daumiller, K., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Gemmeke, H., Ghia, P.L., Glasstetter, R., Grupen, C., Hakenjos, A., Heck, D., Hörandel, J.R., Horneffer, A., Huege, T., Isar, P.G., Kampert, K.-H., Kolotaev, Y., Krömer, O., Kuijpers, J., Lafebre, S., Luczak, P., Mathes, H.J., Mayer, H.J., Meurer, C., Milke, J., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Oehlschläger, J., Ostapchenko, S., Over, S., Petcu, M., Petrovic, J., Pierog, T., Plewnia, S., Rautenberg, J., Rebel, H., Roth, M., Schieler, H., Sima, O., Singh, K., Stümpert, M., Toma, G., Trinchero, G., Ulrich, H., van Buren, J., Walkowiak, W., Weindl, A., Wochele, J., Zabierowski, J., Zensus, J.A., and Zimmermann, D.

Published
2008
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20. Radio detection of cosmic ray air showers with LOPES

Author

Huege, T., Apel, W.D., Asch, T., Badea, A.F., Bähren, L., Bekk, K., Bercuci, A., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Buitink, S., Brüggemann, M., Buchholz, P., Butcher, H., Chiavassa, A., Cossavella, F., Daumiller, K., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Gemmeke, H., Ghia, P.L., Glasstetter, R., Grupen, C., Hakenjos, A., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Isar, P.G., Kampert, K.H., Kolotaev, Y., Krömer, O., Kuijpers, J., Lafebre, S., Mathes, H.J., Mayer, H.J., Meurer, C., Milke, J., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Obenland, R., Oehlschläger, J., Ostapchenko, S., Over, S., Petcu, M., Petrovic, J., Pierog, T., Plewnia, S., Rebel, H., Risse, A., Roth, M., Schieler, H., Sima, O., Singh, K., Stümpert, M., Toma, G., Trinchero, G.C., Ulrich, H., van Buren, J., Walkowiak, W., Weindl, A., Wochele, J., Zabierowski, J., Zensus, J.A., and Zimmermann, D.

Published
2007
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21. Progress in air shower radio measurements: Detection of distant events

Author

Apel, W.D., Asch, T., Badea, A.F., Bähren, L., Bekk, K., Bercuci, A., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Buitink, S., Brüggemann, M., Buchholz, P., Butcher, H., Chiavassa, A., Cossavella, F., Daumiller, K., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Gemmeke, H., Ghia, P.L., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huege, T., Kampert, K.H., Kolotaev, Y., Krömer, O., Kuijpers, J., Lafebre, S., Mathes, H.J., Mayer, H.J., Meurer, C., Milke, J., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Obenland, R., Oehlschläger, J., Ostapchenko, S., Over, S., Petcu, M., Petrovic, J., Pierog, T., Plewnia, S., Rebel, H., Risse, A., Roth, M., Schieler, H., Sima, O., Singh, K., Stümpert, M., Toma, G., Trinchero, G.C., Ulrich, H., van Buren, J., Walkowiak, W., Weindl, A., Wochele, J., Zabierowski, J., Zensus, J.A., and Zimmermann, D.

Published
2006
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22. Detection and imaging of atmospheric radio flashes from cosmic ray air showers

Author

Falcke, H., Apel, W. D., Badea, A. F., Bähren, L., Bekk, K., Bercuci, A., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Buitink, S., Brüggemann, M., Buchholz, P., Butcher, H., Chiavassa, A., Daumiller, K., de Bruyn, A. G., de Vos, C. M., Di Pierro, F., Doll, P., Engel, R., Gemmeke, H., Ghia, P. L., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Hörandel, J. R., Horneffer, A., Huege, T., Kampert, K.-H., Kant, G. W., Klein, U., Kolotaev, Y., Koopman, Y., Krömer, O., Kuijpers, J., Lafebre, S., Maier, G., Mathes, H. J., Mayer, H. J., Milke, J., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Obenland, R., Oehlschläger, J., Ostapchenko, S., Over, S., Pepping, H. J., Petcu, M., Petrovic, J., Plewnia, S., Rebel, H., Risse, A., Roth, M., Schieler, H., Schoonderbeek, G., Sima, O., Stümpert, M., Toma, G., Trinchero, G. C., Ulrich, H., Valchierotti, S., van Buren, J., van Cappellen, W., Walkowiak, W., Weindl, A., Wijnholds, S., Wochele, J., Zabierowski, J., Zensus, J. A., and Zimmermann, D.

Published
2005

24. Measuring the radio emission of cosmic ray air showers with LOPES

Author

Schröder, F.G., Apel, W.D., Arteaga, J.C., Asch, T., Badea, F., Bähren, L., Bekk, K., Bertaina, M., Biermann, P.L., Blümer, J., Bozdog, H., Brancus, I.M., Brüggemann, M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Cossavella, F., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Finger, M., Fuhrmann, D., Gemmeke, H., Ghia, P.L., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Hörandel, J.R., Horneffer, A., Huege, T., Isar, P.G., Kampert, K.-H., Kang, D., Kickelbick, D., Krömer, O., Kuijpers, J., Lafebre, S., łuczak, P., Ludwig, M., Mathes, H.J., Mayer, H.J., Melissas, M., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Oehlschläger, J., Over, S., Palmieri, N., Petcu, M., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Saftoiu, A., Schieler, H., Schmidt, A., Sima, O., Singh, K., Toma, G., Trinchero, G.C., Ulrich, H., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J.A.

Published
2010
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25. Reconstructing energy and Xmax of cosmic ray air showers using the radio lateral distribution measured with LOPES

Author

Apel, W. D., Arteaga, J. C., Bähren, L., Bekk, K., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Chiavassa, A., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Fuchs, B., Fuhrmann, D., Gemmeke, H., Grupen, C., Haungs, A., Heck, D., Hörandel, J. R., Horneffer, A., Huber, D., Huege, T., Isar, P. G., Kampert, K. H., Kang, D., Krömer, O., Kuijpers, J., Link, K., Łuczak, P., Ludwig, M., Mathes, H. J., Melissas, M., Morello, C., Oehlschläger, J., Palmieri, N., Pierog, T., Rautenberg, J., Rebel, H., Roth, M., Rühle, C., Saftoiu, A., Schieler, H., Schmid, A., Schröder, F. G., Sima, O., Toma, G., Trinchero, G. C., Weindl, A., Wochele, J., Wommer, M., Zabierowski, J., and Zensus, J. A.

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, LOPES, FOS: Physical sciences, Cosmic ray, Digital radio, Computational physics, Interferometry, Distribution function, Air shower, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics (astro-ph.IM), Noise (radio), Energy (signal processing)
Abstract

The LOPES experiment, a digital radio interferometer located at KIT (Karlsruhe Institute of Technology), obtained remarkable results for the detection of radio emission from extensive air showers at MHz frequencies. Features of the radio lateral distribution function (LDF) measured by LOPES are explored in this work for a precise reconstruction of two fundamental air shower parameters: the primary energy and the shower Xmax. The method presented here has been developed on (REAS3-)simulations, and is applied to LOPES measurements. Despite the high human-made noise at the LOPES site, it is possible to reconstruct both the energy and Xmax for individual events. On the one hand, the energy resolution is promising and comparable to the one of the co-located KASCADE-Grande experiment. On the other hand, Xmax values are reconstructed with the LOPES measurements with a resolution of 90 g/cm2 . A precision on Xmax better than 30 g/cm2 is predicted and achievable in a region with a lower human-made noise level., 9 pages, 5 figures, Proceedings ARENA 2012

Published
2013

26. Status of LOFAR Data in HDF5 Format

Author

Alexov, A., Schellart, P., Veen, S. ter, Akker, M. van den, Bähren, L., Greissmeier, J.-M., Hessels, J.W.T., Mol, J.D., Renting, G.A., Swinbank, J., Wise, M., Egret, D., Lorente, N.P.F., Ballester, P., High Energy Astrophys. & Astropart. Phys (API, FNWI), Netherlands Institute for Radio Astronomy (ASTRON), Radboud university [Nijmegen], Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Astronomical Institute Anton Pannekoek (AI PANNEKOEK), University of Amsterdam [Amsterdam] (UvA), Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), P. Ballester & D. Egret & N.P.F. Lorente, and Ballester, P.

Subjects
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], [SDU]Sciences of the Universe [physics], Astronomy, Astronomical Society of the Pacific Conference Series
Abstract

International audience; The Hierarchical Data Format, version 5 (HDF5) is a data model, library, and file format for storing and managing data. It is designed for flexible and efficient I/O and for high volume, complex data. The Low Frequency Array (LOFAR) project is solving the challenge of data size and complexity using HDF5. Most of LOFAR's standard data products will be stored using HDF5; the beam-formed time-series data and transient buffer board data have already transitioned from project-specific binary format to HDF5. We report on our effort to pave the way towards new astronomical data encapsulation using HDF5, which can be used by future ground and space projects. The LOFAR project has formed a collaboration with NRAO, the Virtual Astronomical Observatory (VAO) and the HDF Group to obtain funding for a full-time staff member to work on documenting and developing standards for astronomical data written in HDF5. We hope our effort will enhance HDF5 visibility and usage within the community, specifically for LSST, the SKA pathfinders (ASKAP, MeerKAT, MWA, LWA), and other major new radio telescopes such as EVLA, ALMA, and eMERLIN.

Published
2012

27. Towards HDF5: Encapsulation of Large and/or Complex Astronomical Data

Author

Wise, M., Alexov, A., Folk, M., Pierfederici, F., Anderson, K., Bähren, L., Evans, I.N., Accomazzi, A., Mink, D.J., Rots, A.H., and High Energy Astrophys. & Astropart. Phys (API, FNWI)

Abstract

The size and complexity of astronomical data are growing at relentless rates. This increase is especially apparent in the radio community as evidenced by the data challenges faced by many of the SKA pathfinders and other major new radio telescopes such as LOFAR, EVLA, ALMA, ASKAP, MeerKAT, MWA, LWA, and eMERLIN. Enormous data rates are also becoming a challenge for large optical projects that are currently ramping up including Pan-Starrs and LSST. As progress towards meeting these challenges, ASTRON and the LOFAR project are currently exploring the use of the Hierarchical Data Format, version 5 (HDF5) for LOFAR radio data encapsulation. In this session, we brought together scientists and developers struggling with large and complex datasets as well as those groups currently exploring HDF5 implementations. This paper briefly summarizes the BoF presentations, material discussed and future goals.

Published
2011

28. LOFAR and HDF5: toward a new radio data standard

Author

Anderson, K., Alexov, A., Bähren, L., Grießmeier, J.-M., Wise, M., Renting, G.A., Evans, I.N., Accomazzi, A., Mink, D.J., Rots, A.H., and High Energy Astrophys. & Astropart. Phys (API, FNWI)

Abstract

For decades now, scientific data volumes have experienced relentless, exponential growth. As a result, legacy astronomical data formats are straining under a burden not conceived of when these formats were first introduced. With future astronomical projects ensuring this trend, ASTRON and the LOFAR project are exploring the use of the Hierarchical Data Format version 5 (HDF5) for LOFAR radio data encapsulation. Most of LOFAR's standard data products will be stored natively using the HDF5 format. In addition, HDF5 analogues for traditional radio data structures such as visibility data and spectral image cubes are also being developed. The HDF5 libraries allow for the construction of potentially distributed, entirely unbound files. The nature of the HDF5 format further provides the ability to custom design a data encapsulation format. The LOFAR project has designed several data formats that will accommodate all LOFAR data products, examples of which are presented in this paper. With proper development and support, it is hoped that these data formats will be adopted by other astronomical projects as they, too, attempt to grapple with a future filled with mountains of data.

Published
2011

29. Implementation of trigger for detection of ultra high energy cosmic rays with LOFAR

Author

Singh, K., Bähren, L., Falcke, H., Horneffer, A., Kooistra, E., Olaf Scholten, Research unit Nuclear & Hadron Physics, and Research unit Astroparticle Physics

Subjects
Astrophysics::Instrumentation and Methods for Astrophysics
Abstract

Using all stations of LOFAR we are planning to explore the possibility of using Moon as a detector of ultra high energy (>10 21 eV) cosmic rays. The idea is to cover the whole visible lunar surface and to look for short pulses of Cherenkov radiation emitted by showers induced just below the surface of the Moon when the cosmic rays strike it. In the LOFAR station, a large number of digital data streams coming from the receivers are filtered and combined into a single, beamformed digital signal stream per station. This processing takes place in the cascade of a filterbank and a beam-former at station level, however triggering for radio pulses will be performed on a tied array beam formed at central processing level. Therefore, in order to implement this trigger we need to invert the station level digital processing at central processing level to achieve the required accuracy for triggering of real time signal. Additionally, pulse will be influenced by the ionosphere of the earth; therefore coherent dedispersion follow up is required to retrieve the original signal.

Published
2008

30. Radio detection of cosmic rays with LOPES (LOPES Collaboration)

Author

Grupen,C., Apel,W.D., Asch,T., Badea,A.F., Bähren,L., Bekk,K., Bercuci,A., Bertaina,M., Biermann,P.L., Blümer,J., Bozdog,H., Brancus,I.M., Buitink,S., Brüggemann,M., Buchholz,P., Butcher,H., Chiavassa,A., Cossavella,F., Daumiller,K., Di Pierro,F., Doll,P., Engel,R., Falcke,H., Gemmeke,H., Ghia,P.L., Glasstetter,R., Haungs,A., Heck,D., Hörandel,J.R., Horneffer,A., Huege,T., Kampert,K.H., Kolotaev,Y., Krömer,O., Kuijpers,J., Lafebre,S., Mathes,H.J., Mayer,H.J., Meurer,C., Milke,J., Mitrica,B., Morello,C., Navarra,G., Nehls,S., Nigl,A., Obenland,R., Oehlschläger,J., Ostapchenko,S., Over,S., Petcu,M., Petrovic,J., Pierog,T., Plewnia,S., Rebel,H., Roth,M., Schieler,H., Sima,O., Singh,K., Stümpert,M., Toma,G., Trinchero,G.C., Ulrich,H., van Buren,J., Walkowiak,W., Weindl,A., Wochele,J., Zabierowski,J., Zensus,J.A., and Zimmermann,D.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Extensive air shower, Astrophysics::Instrumentation and Methods for Astrophysics, Radio emission, Cosmic rays
Abstract

Data taken with a radio antenna array in combination with the ground-level air shower experiment KASCADE-Grande at the Forschungszentrum Karlsruhe open up the possibility to measure large extensive air showers with this new technique. The pulse height of the observed radio signals scales with the primary energy of the particles initiating the air shower. The dependence of the radio signal on the angle of the shower axis with respect to the Earth's geomagnetic field and the coherence of the radiation suggest that the radio signal generation is due to the geosynchrotron mechanism.

Published
2006

31. Radio emission in air showers measured by LOPES-10 in coincidence with KASCADE-Grande observations

Author

Badea, A. F., Apel, W. D., Asch, T., Bähren, L., Bekk, K., Bercuci, A., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Buitink, S., Brüggemann, M., Buchholz, P., Butcher, H., Chiavassa, A., Cossavella, F., Daumiller, K., Pierro, F. di, Doll, P., Engel, R., Falcke, H., Gemmeke, H., Ghia, P. L., Glasstetter, R., Grupen, C., Haungs, A., Heck, D., Hörandel, J. R., Horneffer, A., Huege, T., Kampert, K. H., Kolotaev, Y., Krömer, O., Kuijpers, J., Lafebre, S., Mathes, H. J., Mayer, H. J., Meurer, C., Milke, J., Mitrica, B., Morello, C., Navarra, G., Nehls, S., Nigl, A., Obenland, R., Oehlschläger, J., Ostapchenko, S., Over, S., Petcu, M., Petrovic, J., Pierog, T., Plewnia, S., Rebel, H., Risse, A., Roth, M., Schieler, H., Sima, O., Singh, K., Stümpert, M., Toma, G., Trinchero, G. C., Ulrich, H., Buren, J. van, Walkowiak, W., Weindl, A., Wochele, J., Zabierowski, J., Zensus, J. A., and Zimmermann, D.

Subjects
Physics, ddc:530
Published
2006
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32. Comparison of LOPES measurements with CoREAS and REAS 3.11 simulations.

Author

Ludwig, M., Apel, W. D., Arteaga-Velázquez, J. C., Bähren, L., Bekk, K., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Chiavassa, A., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Fuchs, B., Fuhrmann, D., and Gemmeke, H.

Subjects
COSMIC ray showers, COMPARATIVE studies, SIMULATION methods & models, MONTE Carlo method, NUMERICAL calculations, REFRACTIVE index, HISTOGRAMS
Abstract

In the previous years, LOPES emerged as a very successful experiment measuring the radio emission from air showers in the MHz frequency range. In parallel, the theoretical description of radio emission was developed further and REAS became a widely used simulation Monte Carlo code. REAS 3 as well as CoREAS are based on the endpoint formalism, i.e. they calculate the emission of the air-shower without assuming specific emission mechanisms. While REAS 3 is based on histograms derived from CORSIKA simulations, CoREAS is directly implemented into CORSIKA without loss of information due to histogramming of the particle distributions. In contrast to the earlier versions of REAS, the newest version REAS 3.11 and CoREAS take into account a realistic atmospheric refractive index. To improve the understanding of the emission processes and judge the quality of the simulations, we compare their predictions with high-quality events measured by LOPES. We present results concerning the lateral distribution measured with 30 east-west aligned LOPES antennas. Only the simulation codes including the refractive index (REAS 3.11 and CoREAS) are able to reproduce the slope of measured lateral distributions, but REAS 3.0 predicts too steep lateral distributions, and does not predict rising lateral distributions as seen in a few LOPES events. Moreover, REAS 3.11 predicts an absolute amplitude compatible with the LOPES measurements. [ABSTRACT FROM AUTHOR]

Published
2013
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33. Cosmic ray measurements with LOPES: Status and recent results.

Author

Schröder, F. G., Apel, W. D., Arteaga-Velázquez, J. C., Bähren, L., Bekk, K., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Chiavassa, A., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Fuchs, B., Fuhrmann, D., and Gemmeke, H.

Subjects
COSMIC ray showers, ANTENNA arrays, RADIO interferometers, ASTROPHYSICS research, PARTICLES (Nuclear physics), RADIO detectors
Abstract

LOPES is a digital antenna array at the Karlsruhe Institute of Technology, Germany, for cosmic-ray air-shower measurements. Triggered by the co-located KASCADE-Grande air-shower array, LOPES detects the radio emission of air showers via digital radio interferometry. We summarize the status of LOPES and recent results. In particular, we present an update on the reconstruction of the primary-particle properties based on almost 500 events above 100PeV. With LOPES, the arrival direction can be reconstructed with a precision of at least 0.65°, and the energy with a precision of at least 20%, which, however, does not include systematic uncertainties on the absolute energy scale. For many particle and astrophysics questions the reconstruction of the atmospheric depth of the shower maximum, Xmax, is important, since it yields information on the type of the primary particle and its interaction with the atmosphere. Recently, we found experimental evidence that the slope of the radio lateral distribution is indeed sensitive to the longitudinal development of the air shower, but unfortunately, the Xmax precision at LOPES is limited by the high level of anthropogenic radio background. Nevertheless, the developed methods can be transferred to next generation experiments with lower background, which should provide an Xmax precision competitive to other detection technologies. [ABSTRACT FROM AUTHOR]

Published
2013
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34. LOPES-3D - vectorial measurements of radio emission from cosmic ray induced air showers.

Author

Huber, D., Apel, W. D., Arteaga-Velázquez, J. C., Bähren, L., Bekk, K., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Chiavassa, A., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Fuchs, B., Fuhrmann, D., and Gemmeke, H.

Subjects
COSMIC ray showers, ELECTRIC fields, PERFORMANCE evaluation, LARGE scale systems, PARAMETER estimation, VECTOR analysis, COMPARATIVE studies
Abstract

LOPES-3D is able to measure all three components of the electric field vector of the radio emission from air showers. This allows a better comparison with emission models. The measurement of the vertical component increases the sensitivity to inclined showers. By measuring all three components of the electric field vector LOPES-3D demonstrates by how much the reconstruction accuracy of primary cosmic ray parameters increases. Thus LOPES-3D evaluates the usefulness of vectorial measurements for large scale applications. [ABSTRACT FROM AUTHOR]

Published
2013
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35. Reconstructing energy and Xmax of cosmic ray air showers using the radio lateral distribution measured with LOPES.

Author

Palmieri, N., Apel, W. D., Arteaga-Velázquez, J. C., Bähren, L., Bekk, K., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Chiavassa, A., Daumiller, K., de Souza, V., Di Pierro, F., Doll, P., Engel, R., Falcke, H., Fuchs, B., Fuhrmann, D., and Gemmeke, H.

Subjects
COSMIC ray showers, PHYSICS experiments, RADIO interferometers, RADIO detectors, DISTRIBUTION (Probability theory), ELECTRIC noise
Abstract

The LOPES experiment, a digital radio interferometer located at KIT (Karlsruhe Institute of Technology), obtained remarkable results for the detection of radio emission from extensive air showers at MHz frequencies. Features of the radio lateral distribution function (LDF) measured by LOPES are explored in this work for a precise reconstruction of two fundamental air shower parameters: the primary energy and the shower Xmax. The method presented here has been developed on (REAS3-)simulations, and is applied to LOPES measurements. Despite the high human-made noise at the LOPES site, it is possible to reconstruct both the energy and Xmax for individual events. On the one hand, the energy resolution is promising and comparable to the one of the co-located KASCADE-Grande experiment. On the other hand, Xmax values are reconstructed with the LOPES measurements with a resolution of 90 g/cm2. A precision on Xmax better than 30 g/cm2 is predicted and achievable in a region with a lower human-made noise level. [ABSTRACT FROM AUTHOR]

Published
2013
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36. ADVANCED DETECTION METHODS OF RADIO SIGNALS FROM COSMIC RAYS FOR KASCADE GRANDE AND AUGER.

Author

GEMMEKE, H., APEL, W. D., BADEA, F. A., BÄHREN, L., BEKK, K., BERCUCI, A., BERTAINA, M., BIERMANN, P. L., BLÜMER, J., BOZDOG, H., BRANCUS, I. M., BRÜGGEMANN, M., BUCHHOLZ, P., BUITINK, S., BUTCHER, H., CHIAVASSA, A., DAUMILLER, K., DE BRUYN, A. G., DE VOS, C. M., and DI PIERRO, F.

Subjects
COSMIC rays, AUGER effect, COSMIC ray showers, ELECTRONS, POSITRONS, SYNCHROTRON radiation
Published
2006

37. ABSOLUTE CALIBRATION OF THE LOPES ANTENNA SYSTEM.

Author

NEHLS, S., APEL, W. D., BADEA, F., BÄHREN, L., BEKK, K., BERCUCI, A., BERTAINA, M., BIERMANN, P. L., BLÜMER, J., BOZDOG, H., BRANCUS, I. M., BRÜGGEMANN, M., BUCHHOLZ, P., BUITINK, S., BUTCHER, H., CHIAVASSA, A., DAUMILLER, K., DE BRUYN, A. G., DE VOS, C. M., and DI PIERRO, F.

Subjects
SOLAR radio emission, COSMIC rays, COSMIC ray showers, RADIO telescopes, ELECTRIC field strength
Published
2006

38. COMBINED LOPES AND KASCADE-GRANDE DATA ANALYSIS.

Author

HAUNGS, A., APEL, W. D., BADEA, F., BÄHREN, L., BEKK, K., BERCUCI, A., BERTAINA, M., BIERMANN, P. L., BLÜMER, J., BOZDOG, H., BRANCUS, I. M., BRÜGGEMANN, M., BUCHHOLZ, P., BUITINK, S., BUTCHER, H., CHIAVASSA, A., DAUMILLER, K., DE BRUYN, A. G., DE VOS, C. M., and DI PIERRO, F.

Subjects
ELECTRONS, MUONS, COSMIC rays, ELECTROMAGNETIC waves, MUONIC neutrino
Published
2006

39. RADIO DETECTION OF COSMIC RAYS WITH LOPES.

Author

HORNEFFER, A., APEL, W. D., BADEA, F., BÄHREN, L., BEKK, K., BERCUCI, A., BERTAINA, M., BIERMANN, P. L., BLÜMER, J., BOZDOG, H., BRANCUS, I. M., BRÜGGEMANN, M., BUCHHOLZ, P., BUITINK, S., BUTCHER, H., CHIAVASSA, A., DAUMILLER, K., DE BRUYN, A. G., DE VOS, C. M., and DI PIERRO, F.

Subjects
COSMIC rays, RADIO pulse time modulation, SOLAR radio emission, INTERFEROMETERS, COSMIC ray showers, RADIO astronomy
Published
2006

40. HIGH-ENERGY COSMIC RAYS INVESTIGATED BY AIR-SHOWER MEASUREMENTS WITH KASCADE, KASCADE-GRANDE, AND LOPES.

Author

HAUNGS, A., APEI, W. D., BADEA, P., BÄHREN, L., BEKK, K., BERCUCI, A., BERTAINA, M., BIERMANN, P. L., BLÜMER, J., BOZDOC, H., BRANCUS, I. M., BRÜGGEMANN, M., BUCHHOLZ, P., BUITINK, S., BUTCHER, H., CHIAVASSA, A., DAUMILLER, K., DE BRUYN, A. G., DE VOS, C. M., and DI PIERRO, F.

Subjects
COSMIC rays, ASTROPHYSICS, PARTICLE physics, MULTIDIMENSIONAL databases, BANDWIDTHS
Published
2006

41. Detecting cosmic rays with the LOFAR radio telescope.

Author

Schellart, P., Nelles, A., Buitink, S., Corstanje, A., Enriquez, J. E., Falcke, H., Frieswijk, W., Hörandel, J. R., Horneffer, A., James, C. W., Krause, M., Mevius, M., Scholten, O., Veen, S. ter, Thoudam, S., Akker, M. van den, Alexov, A., Anderson, J., Avruch, I. M., and Bähren, L.

Subjects
RADIO telescopes, COSMIC rays, SOLAR radio emission, ELECTRIC fields, RADIO frequency, ASTROPHYSICS research
Abstract

The low frequency array (LOFAR), is the first radio telescope designed with the capability to measure radio emission from cosmic-ray induced air showers in parallel with interferometric observations. In the first ~2 years of observing, 405 cosmic-ray events in the energy range of 1016-1018 eV have been detected in the band from 30-80 MHz. Each of these air showers is registered with up to ~1000 independent antennas resulting in measurements of the radio emission with unprecedented detail. This article describes the dataset, as well as the analysis pipeline, and serves as a reference for future papers based on these data. All steps necessary to achieve a full reconstruction of the electric field at every antenna position are explained, including removal of radio frequency interference, correcting for the antenna response and identification of the pulsed signal. [ABSTRACT FROM AUTHOR]

Published
2013
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42. Radio Measurements of Air Showers with LOPES.

Author

Schröder, F G, Apel, W D, Arteaga-Velazquez, J C, Bähren, L, Bekk, K, Bertaina, M, Biermann, P L, Blümer, J, Bozdog, H, Brancus, I M, Cantoni, E, Chiavassa, A, Daumiller, K, Souza, V de, Pierro, F Di, Doll, P, Engel, R, Falcke, H, Fuchs, B, and Fuhrmann, D

Published
2013
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43. New measurements of cosmic ray air showers with the digital radio interferometer LOPES.

Author

Schröder, F. G., Apel, W. D., Arteaga, J. C., Asch, T., Bähren, L., Bekk, K., Bertaina, M., Biermann, P. L., Blümer, J., Bozdog, H., Brancus, I. M., Buchholz, P., Buitink, S., Cantoni, E., Chiavassa, A., Daumiller, K., de Souza, V., Doll, P., Engel, R., and Falcke, H.

Subjects
COSMIC ray showers, RADIO interferometers, DIPOLE antennas, PARTICLES (Nuclear physics), MONTE Carlo method, ASTROPHYSICS
Abstract

LOPES is a digital radio interferometer which measures the radio emission of extensive cosmic ray air showers. It mainly consists of 30 dipole antennas installed in co-location with KASCADE-Grande at the Karlsruhe Institute of Technology (KIT) in Germany. KASCADE-Grande measures the secondary air shower particles at ground. Whenever KASCADE-Grande detects a high-energy cosmic ray event (≳1016 eV), it triggers LOPES which then digitally records the radio signal in the frequency band from 40 to 80MHz. Using interferometric methods, LOPES is able to successfully detect air shower induced radio pulses, even in the noisy environment at the KIT. In the present studies, a considerable progress in understanding the radio emission mechanism is shown: The latest version of the "radio emission in air shower" simulation program, REAS3, seems to be the first Monte Carlo tool which is able to reproduce the magnitude and slope of most of the measured lateral distributions. [ABSTRACT FROM AUTHOR]

Published
2011
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44. An air shower array for LOFAR: LORA.

Author

Thoudam, S., Aar, G. v., Akker, M. v. d., Bähren, L., Corstanje, A., Falcke, H., Hörandel, J. R., Horneffer, A., James, C., Mevius, M., Scholten, O., Singh, K., Veen, S. ter, and Chilingarian, A.

Subjects
COSMIC ray showers, RADIO telescopes, NEUTRINOS, ELECTRONS, POSITRONS, SYNCHROTRON radiation, SCINTILLATORS, MOON
Abstract

LOFAR is a new form of radio telescope which can detect radio emission from air showers induced by ver high-energy cosmic rays. It can also look for radio emission from particle cascades on the Moon induced by ultra high energy cosmic rays or neutrinos. To complement the radio detection, we are setting up a small particle detector array LORA (LOfar Radboud Air shower array) within an area of ∼300 m diameter in the LOFAR core. It will help in triggering and confirming the radio detection of air showers with the LOFAR antennas. In this paper, we present a short overview about LORA and discuss its current status. [ABSTRACT FROM AUTHOR]

Published
2011
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47. MEASURING RADIO PULSES FROM AIR SHOWERS WITH LOPES.

Author

Horneffer, Andreas, Antoni, T., Apel, W. D., Badea, F., Bähren, L., Bekk, K., Bercuci, A., Bertaina, M., Bbiermann, P. L., Blümer, H., Bozdog, H., Brancus, I. M., Brüggemann, M., Buchholz, P., Butcher, H., Büttner, C., Chiavassa, A., Daumiller, K., de Bruyn, G., and de Vos, C. M.

Subjects
COSMIC ray showers, COSMIC rays, RADIO frequency, RADIO telescopes, RADIO interference
Abstract

LOFAR is a new digital radio interferometer that is being build in The Netherlands. By sampling the radio waves with fast ADCs it can digitally store the whole waveform information and analyze transient events like air showers after they have been recorded. To demonstrate its ability to measure air showers we are building LOPES (a LOFAR PrototypeStation) at the site of an existing air shower array (KASCADE-Grande). The first phase consisting of 10 antennas is already running. It has demonstrated how digital interference suppression and beamforming can overcome the problem of radio interference and pick out air shower events. [ABSTRACT FROM AUTHOR]

Published
2005

49. Air shower radio detection with LOPES.

Author

Blümer, J., Apel, W. D., Arteaga, J. C., Asch, T., Auffenberg, J., Badea, F., Bähren, L., Bekk, K., Bertaina, M., Biermann, P. L., Bozdog, H., Brancus, I. M., Brüggemann, M., Buchholz, P., Buitink, S., Butcher, H., Chiavassa, A., Cossavella, F., Daumiller, K., and Souza, V. de

Published
2008
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