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Enhanced sensitivity of the LIGO gravitational wave detector by using squeezed states of light (2013)

Aasi, J. ; Abadie, J. ; Abbott, B. P. ; [weitere]

Springer Nature

In: Nature Photonics. 2013; 7(8): 613-619. Published 2013 Jul 21. doi: 10.1038/nphoton.2013.177.

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Publikationsdatum: 2013-07-21

Print ISSN: 1749-4885

Digitale ISSN: 1749-4893

Thema: Physik

Publiziert von Springer Nature

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Social identity, intergroup conflict, and conflict reduction (2001)

Ashmore, Richard D. ; Jussim, Lee J. ; Wilder, David

Oxford [England] ; New York, N.Y. [USA] : Oxford University Press

Rutgers series on self and social identity

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Schlagwort(e): Conflict management. ; Ethnic relations. ; Gestion des conflits. ; Group identity. ; Identité collective. ; Relations interethniques.

Notizen: Introduction : social identity and intergroup conflict / Lee Jussim, Richard D. Ashmore, and David Wilder / Ingroup identification and intergroup conflict : when does ingroup love become outgroup hate? / Marilynn B. Brewer -- Ethnic identity, national identity, and intergroup conflict : the significance of personal experiences / Thomas Hylland Eriksen -- The meaning of american national identity : patterns of ethnic conflict and consensus / Jack Citrin, Cara Wong, and Brian Duff -- Communal and national identity in a multiethnic state : a comparison of three perspectives / Jim Sidanius and John R. Petrocik -- Social and role identities and political violence : identity as a window on violence in northern ireland / Robert W. White -- Individual and group identities in genocide and mass killing / Ervin Staub -- The role of national identity in conflict resolution : experiences from Israeli-Palestinian problem-solving workshops / Herbert C. Kelman -- Conclusion : toward a social identity framework for intergroup conflict / Richard D. Ashmore, Lee Jussim, David Wilder, and Jessica Heppen

Seiten: xii, 270 p.

ISBN: 0-19-530241-9

URL: http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=129724

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Twentieth century sprawl : highways and the reshaping of the American Landscape ; Highways transformed America (2004)

Gutfreund, Owen D.

New York : Oxford University Press

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Schlagwort(e): Denver (Colo.), History, 20th century. ; Middlebury (Vt. : Town), History, 20th century. ; Smyrna (Rutherford County, Tenn.), History, 20th century. ; Cities and towns, United States, Growth, History, 20th century, Case studies. ; Interstate Highway System, History, 20th century. ; Roads, Government policy, United States, History, 20th century. ; Transportation, Automotive, United States, History, 20th century.

Notizen: Highway federalism -- Denver meets the automobile -- The decentralization of post-World War II Denver -- Automobiles and a small town -- Bridges, bypasses, and boulevards -- AutoCity : Smyrna, Tennessee

Seiten: xiv, 297 p.

ISBN: 0-19-530264-8

URL: http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=129257

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Democracies in flux : the evolution of social capital in contemporary society (2002)

Putnam, Robert D.

Oxford ; New York : Oxford University Press

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Schlagwort(e): Capital social (Sociologie) ; Civil society. ; Democracy. ; Démocratie. ; Social capital (Sociology) ; Société civile.

Notizen: Introduction /Robert D. Putnam and Kristin A. Goss --Great Britain: the role of government and the distribution of social capital /Peter A. Hall --United States: bridging the privileged and the marginalized? /Robert Wuthnow --United States: from membership to advocacy /Theda Skocpol --France: old and new civic and social ties in France /Jean-Pierre Worms --Decline of social capital?: the German case /Claus Offe and Susanne Fuchs --From civil war to civil society: social capital in Spain from the 1930s to the 1990s /Victor Pérez-Díaz --Sweden: social capital in the social democratic state /Bo Rothstein --Australia: making the lucky country /Eva Cox --Broadening the basis of social capital in Japan /Takashi Inoguchi --Conclusion /Robert D. Putnam.

Seiten: 516 p.

ISBN: 0-19-518460-2

URL: http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=120945

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Imputation and subset-based association analysis across different cancer types identifies multiple independent risk loci in the TERT-CLPTM1L region on chromosome 5p15.33 (2014)

Wang, Z., Zhu, B., Zhang, M., Parikh, H., Jia, J., Chung, C. C., Sampson, J. N., Hoskins, J. W., Hutchinson, A., Burdette, L., Ibrahim, A., Hautman, C., Raj, P. S., Abnet, C. C., Adjei, A. A., Ahlbom, A., Albanes, D., Allen, N. E., Ambrosone, C. B., Aldrich, M., Amiano, P., Amos, C., Andersson, U., Andriole, G., Andrulis, I. L., Arici, C., Arslan, A. A., Austin, M. A., Baris, D., Barkauskas, D. A., Bassig, B. A., Beane Freeman, L. E., Berg, C. D., Berndt, S. I., Bertazzi, P. A., Biritwum, R. B., Black, A., Blot, W., Boeing, H., Boffetta, P., Bolton, K., Boutron-Ruault, M.-C., Bracci, P. M., Brennan, P., Brinton, L. A., Brotzman, M., Bueno-de-Mesquita, H. B., Buring, J. E., Butler, M. A., Cai, Q., Cancel-Tassin, G., Canzian, F., Cao, G., Caporaso, N. E., Carrato, A., Carreon, T., Carta, A., Chang, G.-C., Chang, I.-S., Chang-Claude, J., Che, X., Chen, C.-J., Chen, C.-Y., Chen, C.-H., Chen, C., Chen, K.-Y., Chen, Y.-M., Chokkalingam, A. P., Chu, L. W., Clavel-Chapelon, F., Colditz, G. A., Colt, J. S., Conti, D., Cook, M. B., Cortessis, V. K., Crawford, E. D., Cussenot, O., Davis, F. G., De Vivo, I., Deng, X., Ding, T., Dinney, C. P., Di Stefano, A. L., Diver, W. R., Duell, E. J., Elena, J. W., Fan, J.-H., Feigelson, H. S., Feychting, M., Figueroa, J. D., Flanagan, A. M., Fraumeni, J. F., Freedman, N. D., Fridley, B. L., Fuchs, C. S., Gago-Dominguez, M., Gallinger, S., Gao, Y.-T., Gapstur, S. M., Garcia-Closas, M., Garcia-Closas, R., Gastier-Foster, J. M., Gaziano, J. M., Gerhard, D. S., Giffen, C. A., Giles, G. G., Gillanders, E. M., Giovannucci, E. L., Goggins, M., Gokgoz, N., Goldstein, A. M., Gonzalez, C., Gorlick, R., Greene, M. H., Gross, M., Grossman, H. B., Grubb, R., Gu, J., Guan, P., Haiman, C. A., Hallmans, G., Hankinson, S. E., Harris, C. C., Hartge, P., Hattinger, C., Hayes, R. B., He, Q., Helman, L., Henderson, B. E., Henriksson, R., Hoffman-Bolton, J., Hohensee, C., Holly, E. A., Hong, Y.-C., Hoover, R. N., Hosgood, H. D., Hsiao, C.-F., Hsing, A. W., Hsiung, C. A., Hu, N., Hu, W., Hu, Z., Huang, M.-S., Hunter, D. J., Inskip, P. D., Ito, H., Jacobs, E. J., Jacobs, K. B., Jenab, M., Ji, B.-T., Johansen, C., Johansson, M., Johnson, A., Kaaks, R., Kamat, A. M., Kamineni, A., Karagas, M., Khanna, C., Khaw, K.-T., Kim, C., Kim, I.-S., Kim, J. H., Kim, Y. H., Kim, Y.-C., Kim, Y. T., Kang, C. H., Jung, Y. J., Kitahara, C. M., Klein, A. P., Klein, R., Kogevinas, M., Koh, W.-P., Kohno, T., Kolonel, L. N., Kooperberg, C., Kratz, C. P., Krogh, V., Kunitoh, H., Kurtz, R. C., Kurucu, N., Lan, Q., Lathrop, M., Lau, C. C., Lecanda, F., Lee, K.-M., Lee, M. P., Le Marchand, L., Lerner, S. P., Li, D., Liao, L. M., Lim, W.-Y., Lin, D., Lin, J., Lindstrom, S., Linet, M. S., Lissowska, J., Liu, J., Ljungberg, B., Lloreta, J., Lu, D., Ma, J., Malats, N., Mannisto, S., Marina, N., Mastrangelo, G., Matsuo, K., McGlynn, K. A., McKean-Cowdin, R., McNeill, L. H., McWilliams, R. R., Melin, B. S., Meltzer, P. S., Mensah, J. E., Miao, X., Michaud, D. S., Mondul, A. M., Moore, L. E., Muir, K., Niwa, S., Olson, S. H., Orr, N., Panico, S., Park, J. Y., Patel, A. V., Patino-Garcia, A., Pavanello, S., Peeters, P. H. M., Peplonska, B., Peters, U., Petersen, G. M., Picci, P., Pike, M. C., Porru, S., Prescott, J., Pu, X., Purdue, M. P., Qiao, Y.-L., Rajaraman, P., Riboli, E., Risch, H. A., Rodabough, R. J., Rothman, N., Ruder, A. M., Ryu, J.-S., Sanson, M., Schned, A., Schumacher, F. R., Schwartz, A. G., Schwartz, K. L., Schwenn, M., Scotlandi, K., Seow, A., Serra, C., Serra, M., Sesso, H. D., Severi, G., Shen, H., Shen, M., Shete, S., Shiraishi, K., Shu, X.-O., Siddiq, A., Sierrasesumaga, L., Sierri, S., Loon Sihoe, A. D., Silverman, D. T., Simon, M., Southey, M. C., Spector, L., Spitz, M., Stampfer, M., Stattin, P., Stern, M. C., Stevens, V. L., Stolzenberg-Solomon, R. Z., Stram, D. O., Strom, S. S., Su, W.-C., Sund, M., Sung, S. W., Swerdlow, A., Tan, W., Tanaka, H., Tang, W., Tang, Z.-Z., Tardon, A., Tay, E., Taylor, P. R., Tettey, Y., Thomas, D. M., Tirabosco, R., Tjonneland, A., Tobias, G. S., Toro, J. R., Travis, R. C., Trichopoulos, D., Troisi, R., Truelove, A., Tsai, Y.-H., Tucker, M. A., Tumino, R., Van Den Berg, D., Van Den Eeden, S. K., Vermeulen, R., Vineis, P., Visvanathan, K., Vogel, U., Wang, C., Wang, C., Wang, J., Wang, S. S., Weiderpass, E., Weinstein, S. J., Wentzensen, N., Wheeler, W., White, E., Wiencke, J. K., Wolk, A., Wolpin, B. M., Wong, M. P., Wrensch, M., Wu, C., Wu, T., Wu, X., Wu, Y.-L., Wunder, J. S., Xiang, Y.-B., Xu, J., Yang, H. P., Yang, P.-C., Yatabe, Y., Ye, Y., Yeboah, E. D., Yin, Z., Ying, C., Yu, C.-J., Yu, K., Yuan, J.-M., Zanetti, K. A., Zeleniuch-Jacquotte, A., Zheng, W., Zhou, B., Mirabello, L., Savage, S. A., Kraft, P., Chanock, S. J., Yeager, M., Landi, M. T., Shi, J., Chatterjee, N., Amundadottir, L. T.

Oxford University Press

In: Human Molecular Genetics

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Publikationsdatum: 2014-11-21

Beschreibung: Genome-wide association studies (GWAS) have mapped risk alleles for at least 10 distinct cancers to a small region of 63 000 bp on chromosome 5p15.33. This region harbors the TERT and CLPTM1L genes; the former encodes the catalytic subunit of telomerase reverse transcriptase and the latter may play a role in apoptosis. To investigate further the genetic architecture of common susceptibility alleles in this region, we conducted an agnostic subset-based meta-analysis (association analysis based on subsets) across six distinct cancers in 34 248 cases and 45 036 controls. Based on sequential conditional analysis, we identified as many as six independent risk loci marked by common single-nucleotide polymorphisms: five in the TERT gene (Region 1: rs7726159, P = 2.10 x 10 –39 ; Region 3: rs2853677, P = 3.30 x 10 –36 and P Conditional = 2.36 x 10 –8 ; Region 4: rs2736098, P = 3.87 x 10 –12 and P Conditional = 5.19 x 10 –6 , Region 5: rs13172201, P = 0.041 and P Conditional = 2.04 x 10 –6 ; and Region 6: rs10069690, P = 7.49 x 10 –15 and P Conditional = 5.35 x 10 –7 ) and one in the neighboring CLPTM1L gene (Region 2: rs451360; P = 1.90 x 10 –18 and P Conditional = 7.06 x 10 –16 ). Between three and five cancers mapped to each independent locus with both risk-enhancing and protective effects. Allele-specific effects on DNA methylation were seen for a subset of risk loci, indicating that methylation and subsequent effects on gene expression may contribute to the biology of risk variants on 5p15.33. Our results provide strong support for extensive pleiotropy across this region of 5p15.33, to an extent not previously observed in other cancer susceptibility loci.

Print ISSN: 0964-6906

Digitale ISSN: 1460-2083

Thema: Biologie , Medizin

Publiziert von Oxford University Press

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Imputation and subset-based association analysis across different cancer types identifies multiple independent risk loci in the TERT-CLPTM1L region on chromosome 5p15.33 (2014)

Wang, Z. ; Zhu, B. ; Zhang, M. ; [weitere]

Oxford University Press

In: Human Molecular Genetics. 2014; 23(24): 6616-6633. Published 2014 Jul 15. doi: 10.1093/hmg/ddu363.

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Publikationsdatum: 2014-07-15

Print ISSN: 0964-6906

Digitale ISSN: 1460-2083

Thema: Biologie , Medizin

Publiziert von Oxford University Press

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Search for very high energy gamma-rays from the z = 0.896 quasar 4C +55.17 with the MAGIC telescopes (2014)

Aleksić, J., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Bangale, P., de Almeida, U. B., Barrio, J. A., Gonzalez, J. B., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carmona, E., Carosi, A., Fidalgo, D. C., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Da Vela, P., Dazzi, F., De Angelis, A., De Caneva, G., De Lotto, B., Mendez, C. D., Doert, M., Dominguez, A., Prester, D. D., Dorner, D., Doro, M., Einecke, S., Eisenacher, D., Elsaesser, D., Farina, E., Ferenc, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., Lopez, R. J. G., Garczarczyk, M., Terrats, D. G., Gaug, M., Giavitto, G., Godinović, N., Munoz, A. G., Gozzini, S. R., Hadasch, D., Hayashida, M., Herrero, A., Hildebrand, D., Hose, J., Hrupec, D., Idec, W., Kadenius, V., Kellermann, H., Knoetig, M. L., Kodani, K., Konno, Y., Krause, J., Kubo, H., Kushida, J., Barbera, A. L., Lelas, D., Lewandowska, N., Lindfors, E., Lombardi, S., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Lorenz, E., Lozano, I., Makariev, M., Mallot, K., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Marcote, B., Mariotti, M., Martinez, M., Mazin, D., Menzel, U., Meucci, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Munar-Adrover, P., Nakajima, D., Niedzwiecki, A., Nilsson, K., Nishijima, K., Nowak, N., Orito, R., Overkemping, A., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Paredes-Fortuny, X., Partini, S., Persic, M., Prada, F., Moroni, P. G. P., Prandini, E., Preziuso, S., Puljak, I., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Garcia, J. R., Rugamer, S., Saggion, A., Saito, T., Saito, K., Salvati, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpaa, A., Sitarek, J., Snidaric, I., Sobczynska, D., Spanier, F., Stamatescu, V., Stamerra, A., Steinbring, T., Storz, J., Sun, S., Surić, T., Takalo, L., Takami, H., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Thaele, J., Tibolla, O., Torres, D. F., Toyama, T., Treves, A., Vogler, P., Wagner, R. M., Zandanel, F., Zanin, R.

Oxford University Press

In: Monthly Notices of the Royal Astronomical Society

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Publikationsdatum: 2014-04-02

Beschreibung: The bright gamma-ray quasar 4C +55.17 is a distant source ( z = 0.896) with a hard spectrum at GeV energies as observed by the Large Area Telescope (LAT) on board the Fermi satellite. This source is identified as a good source candidate for very high energy (VHE; 〉30 GeV) gamma-rays. In general, VHE gamma-rays from distant sources provide a unique opportunity to study the extragalactic background light (EBL) and underlying astrophysics. The flux intensity of this source in the VHE range is investigated. Then, constraints on the EBL are derived from the attenuation of gamma-ray photons coming from the distant blazar. We searched for a gamma-ray signal from this object using the 35 h observations taken by the MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) telescopes between 2010 November and 2011 January. No significant VHE gamma-ray signal was detected. We computed the upper limits of the integrated gamma-ray flux at the 95 per cent confidence level of 9.4 10 –12 and 2.5 10 –12 cm –2 s –1 above 100 and 200 GeV, respectively. The differential upper limits in four energy bins in the range from 80 to 500 GeV are also derived. The upper limits are consistent with the attenuation predicted by low-flux EBL models on the assumption of a simple power-law spectrum extrapolated from LAT data.

Print ISSN: 0035-8711

Digitale ISSN: 1365-2966

Thema: Physik

Publiziert von Oxford University Press

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Discovery of very high energy {gamma}-ray emission from the blazar 1ES 0033+595 by the MAGIC telescopes (2014)

Aleksić, J., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Bangale, P., de Almeida, U. B., Barrio, J. A., Gonzalez, J. B., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carmona, E., Carosi, A., Fidalgo, D. C., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Da Vela, P., Dazzi, F., De Angelis, A., De Caneva, G., De Lotto, B., Mendez, C. D., Doert, M., Dominguez, A., Prester, D. D., Dorner, D., Doro, M., Einecke, S., Eisenacher, D., Elsaesser, D., Farina, E., Ferenc, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., Lopez, R. J. G., Garczarczyk, M., Terrats, D. G., Gaug, M., Godinović, N., Munoz, A. G., Gozzini, S. R., Hadasch, D., Hayashida, M., Herrera, J., Herrero, A., Hildebrand, D., Hose, J., Hrupec, D., Idec, W., Kadenius, V., Kellermann, H., Kodani, K., Konno, Y., Krause, J., Kubo, H., Kushida, J., Barbera, A. L., Lelas, D., Lewandowska, N., Lindfors, E., Lombardi, S., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Lorenz, E., Lozano, I., Makariev, M., Mallot, K., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Marcote, B., Mariotti, M., Martinez, M., Mazin, D., Menzel, U., Meucci, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Munar-Adrover, P., Nakajima, D., Niedzwiecki, A., Nilsson, K., Nishijima, K., Noda, K., Nowak, N., Orito, R., Overkemping, A., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Paredes-Fortuny, X., Partini, S., Persic, M., Prada, F., Moroni, P. G. P., Prandini, E., Preziuso, S., Puljak, I., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Garcia, J. R., Rugamer, S., Saggion, A., Saito, T., Saito, K., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpaa, A., Sitarek, J., Snidaric, I., Sobczynska, D., Spanier, F., Stamatescu, V., Stamerra, A., Steinbring, T., Storz, J., Sun, S., Surić, T., Takalo, L., Takami, H., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Thaele, J., Tibolla, O., Torres, D. F., Toyama, T., Treves, A., Uellenbeck, M., Vogler, P., Wagner, R. M., Zandanel, F., Zanin, R., collaboration), (MAGIC, Tronconi, V., Buson, S., Borghese, A.

Oxford University Press

In: Monthly Notices of the Royal Astronomical Society

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Publikationsdatum: 2014-11-13

Beschreibung: The number of known very high energy (VHE) blazars is ~50, which is very small in comparison to the number of blazars detected in other frequencies. This situation is a handicap for population studies of blazars, which emit about half of their luminosity in the -ray domain. Moreover, VHE blazars, if distant, allow for the study of the environment that the high-energy -rays traverse in their path towards the Earth, like the extragalactic background light (EBL) and the intergalactic magnetic field (IGMF), and hence they have a special interest for the astrophysics community. We present the first VHE detection of 1ES 0033+595 with a statistical significance of 5.5. The VHE emission of this object is constant throughout the MAGIC observations (2009 August and October), and can be parametrized with a power law with an integral flux above 150 GeV of (7.1 ± 1.3) x 10 –12 photons cm –2 s –1 and a photon index of (3.8 ± 0.7). We model its spectral energy distribution (SED) as the result of inverse Compton scattering of synchrotron photons. For the study of the SED, we used simultaneous optical R -band data from the KVA telescope, archival X-ray data by Swift as well as INTEGRAL , and simultaneous high-energy (HE, 300 MeV–10 GeV) -ray data from the Fermi Large Area Telescope (LAT) observatory. Using the empirical approach of Prandini et al. ( 2010 ) and the Fermi LAT and MAGIC spectra for this object, we estimate the redshift of this source to be 0.34 ± 0.08 ± 0.05. This is a relevant result because this source is possibly one of the 10 most distant VHE blazars known to date, and with further (simultaneous) observations could play an important role in blazar population studies, as well as future constraints on the EBL and IGMF.

Print ISSN: 0035-8711

Digitale ISSN: 1365-2966

Thema: Physik

Publiziert von Oxford University Press

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Search for very high energy gamma-rays from the z = 0.896 quasar 4C +55.17 with the MAGIC telescopes (2014)

Aleksi , J. ; Ansoldi, S. ; Antonelli, L. A. ; [weitere]

Oxford University Press

In: Monthly Notices of the Royal Astronomical Society. 2014; 440(1): 530–535. Published 2014 Mar 11. doi: 10.1093/mnras/stu227.

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Publikationsdatum: 2014-03-11

Print ISSN: 0035-8711

Digitale ISSN: 1365-2966

Thema: Physik

Publiziert von Oxford University Press im Namen von The Royal Astronomical Society.

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MAGIC upper limits on the GRB 090102 afterglow (2013)

Aleksic, J., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., de Almeida, U. B., Barrio, J. A., Gonzalez, J. B., Bednarek, W., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carmona, E., Carosi, A., Fidalgo, D. C., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Cossio, L., Covino, S., Da Vela, P., Dazzi, F., De Angelis, A., De Caneva, G., De Lotto, B., Mendez, C. D., Doert, M., Dominguez, A., Prester, D. D., Dorner, D., Doro, M., Eisenacher, D., Elsaesser, D., Farina, E., Ferenc, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., Lopez, R. J. G., Garczarczyk, M., Terrats, D. G., Gaug, M., Giavitto, G., Godinovic, N., Munoz, A. G., Gozzini, S. R., Hadamek, A., Hadasch, D., Herrero, A., Hose, J., Hrupec, D., Idec, W., Kadenius, V., Knoetig, M. L., Krahenbuhl, T., Krause, J., Kushida, J., Barbera, A. L., Lelas, D., Lewandowska, N., Lindfors, E., Lombardi, S., Lopez-Coto, R., Lopez, M., Lopez-Oramas, A., Lorenz, E., Lozano, I., Makariev, M., Mallot, K., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Marcote, B., Mariotti, M., Martinez, M., Masbou, J., Mazin, D., Menzel, U., Meucci, M., Miranda, J. M., Mirzoyan, R., Moldon, J., Moralejo, A., Munar-Adrover, P., Nakajima, D., Niedzwiecki, A., Nilsson, K., Nowak, N., Orito, R., Overkemping, A., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Partini, S., Persic, M., Prada, F., Moroni, P. G. P., Prandini, E., Preziuso, S., Puljak, I., Reichardt, I., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Garcia, J. R., Rugamer, S., Saggion, A., Saito, K., Saito, T., Salvati, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpaa, A., Sitarek, J., Snidaric, I., Sobczynska, D., Spanier, F., Stamatescu, V., Stamerra, A., Storz, J., Sun, S., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Thaele, J., Tibolla, O., Torres, D. F., Toyama, T., Treves, A., Uellenbeck, M., Vogler, P., Wagner, R. M., Weitzel, Q., Zandanel, F., Zanin, R., Bouvier, A., Hayashida, M., Tajima, H., Longo, F.

Oxford University Press

In: Monthly Notices of the Royal Astronomical Society

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Publikationsdatum: 2013-12-27

Beschreibung: Indications of a GeV component in the emission from gamma-ray bursts (GRBs) are known since the Energetic Gamma-Ray Experiment Telescope observations during the 1990s and they have been confirmed by the data of the Fermi satellite. These results have, however, shown that our understanding of GRB physics is still unsatisfactory. The new generation of Cherenkov observatories and in particular the MAGIC telescope, allow for the first time the possibility to extend the measurement of GRBs from several tens up to hundreds of GeV energy range. Both leptonic and hadronic processes have been suggested to explain the possible GeV/TeV counterpart of GRBs. Observations with ground-based telescopes of very high energy (VHE) photons ( E 〉 30 GeV) from these sources are going to play a key role in discriminating among the different proposed emission mechanisms, which are barely distinguishable at lower energies. MAGIC telescope observations of the GRB 090102 ( z = 1.547) field and Fermi Large Area Telescope data in the same time interval are analysed to derive upper limits of the GeV/TeV emission. We compare these results to the expected emissions evaluated for different processes in the framework of a relativistic blastwave model for the afterglow. Simultaneous upper limits with Fermi and a Cherenkov telescope have been derived for this GRB observation. The results we obtained are compatible with the expected emission although the difficulties in predicting the HE and VHE emission for the afterglow of this event makes it difficult to draw firmer conclusions. Nonetheless, MAGIC sensitivity in the energy range of overlap with space-based instruments (above about 40 GeV) is about one order of magnitude better with respect to Fermi . This makes evident the constraining power of ground-based observations and shows that the MAGIC telescope has reached the required performance to make possible GRB multiwavelength studies in the VHE range.

Print ISSN: 0035-8711

Digitale ISSN: 1365-2966

Thema: Physik

Publiziert von Oxford University Press

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