Zobrazeno 1 - 10
of 121
pro vyhledávání: '"A. M. Hillas"'
Autor:
A. M. Hillas
Publikováno v:
Astroparticle Physics. 43:19-43
Most of what we know of cosmic gamma rays has come from spacecraft, but at energies above tens of GeV it has become possible to make observations with ground-based detectors of enormously greater collecting area. In recent years one such detector typ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad46ac43fc7951007f0150316970601f
https://doi.org/10.1016/j.astropartphys.2012.06.002
https://doi.org/10.1016/j.astropartphys.2012.06.002
Autor:
D. A. Carter-Lewis, H. M. Badran, Tony Hall, John L. Quinn, Julie McEnery, M. F. Cawley, J. P. Finley, S. D. Biller, H. J. Rose, T. C. Weekes, I. H. Bond, G. H. Sembroski, C. Masterson, Frank W. Samuelson, R. W. Lessard, Carl W. Akerlof, S. M. Bradbury, D. J. Fegan, G. Mohanty, Jeffrey Zweerink, A. J. Rodgers, M. Catanese, P. J. Boyle, Christian Wilson, Michael Schubnell, J. A. Gaidos, R. C. Lamb, J. Bussons Gordo, A. M. Hillas, J. H. Buckley, Valerie Connaughton, A. M. Burdett, Raghavan Srinivasan, F. Krennrich
We present the discovery of gamma-ray emission greater than 350 GeV from the BL Lacertae (BL Lac) object 1ES 2344 + 514 with the Whipple Observatory 10 m gamma-ray telescope. This is the third BL Lac object detected at very high energies (VHE, E > 30
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36b463ca5dbf41f3a6761a1ff6664f4b
https://ora.ox.ac.uk/objects/uuid:681a3c2a-f8c2-46d4-87d1-39532f80d89e
https://ora.ox.ac.uk/objects/uuid:681a3c2a-f8c2-46d4-87d1-39532f80d89e
Autor:
J. H. Buckley, R. W. Lessard, J. E. McEnery, J. Zweerink, H. J. Rose, D. J. Fegan, A. M. Burdett, G. H. Sembroski, S. D. Biller, John L. Quinn, Frank W. Samuelson, A. M. Hillas, D. A. Carter-Lewis, F. Krennrich, R. C. Lamb, J. A. Gaidos, A. J. Rodgers, J. P. Finley, T. C. Weekes, J. Bussons Gordo, G. Mohanty, P. Skelton
From considering the effect of γ γ interactions on recently observed TeV gamma-ray spectra, improved limits are set to the density of extragalactic infrared photons which are robust and essentially model independent. The resulting limits are more t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa806c79e70bf386de26636806223be1
https://doi.org/10.1103/physrevlett.80.2992
https://doi.org/10.1103/physrevlett.80.2992
Autor:
A. M. Hillas
Publikováno v:
Astroparticle Physics. 32:160-176
The correlation between the directions of optically-detected AGNs within 75 Mpc and the arrival directions of cosmic rays above 57 EeV detected by the Auger collaboration up to August 2007 is examined using uniform-exposure plots and a form of right
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65f0113e1aab3fea8c7aa7ec2336119e
https://doi.org/10.1016/j.astropartphys.2009.07.005
https://doi.org/10.1016/j.astropartphys.2009.07.005
Autor:
A M Hillas
Publikováno v:
Journal of Physics: Conference Series. 47:168-177
Bell's version of diffusive shock acceleration in supernova remnants, in which the (highly contorted) magnetic field is mainly self-generated by the accelerated particles, seems to explain the sharpness of the knee in the cosmic ray spectrum (an effe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d525d384b529bf9f9840643adf19f2c
https://doi.org/10.1088/1742-6596/47/1/021
https://doi.org/10.1088/1742-6596/47/1/021
Autor:
J. McEnery, A. M. Hillas, O. Celik, J. H. Buckley, C. Duke, J. Grube, A. Syson, Dietrich Müller, David Kieda, J. Lloyd-Evans, A. Jarvis, J. Hall, K. Ragan, Reshmi Mukherjee, K. Kosack, P. Moriarty, F. Krennrich, V. V. Vassiliev, M. K. Daniel, G. H. Sembroski, J. Knapp, Wei Cui, B. Power-Mooney, D. J. Fegan, S. P. Swordy, Jamie Holder, I. de la Calle Perez, P. T. Reynolds, S. P. Wakely, G. Walker, S. J. Fegan, R. A. Ong, S. Le Bohec, G. E. Kenny, I. H. Bond, M. Schroedter, J. P. Finley, R. Pallassini, T. C. Weekes, Lucy Fortson, M. Jordan, M. Catanese, D. Petry, John Kildea, D. S. Hanna, P. Rebillot, P. J. Boyle, E. Linton, Henric Krawczynski, D. A. Carter-Lewis, H. M. Badran, M. D'Vali, Tony Hall, Mark N. Quinn, M. J. Lang, J. A. Gaidos, S. J. Nolan, A. Milovanovic, R. W. Lessard, Jeffrey Zweerink, H. J. Rose, S. M. Bradbury, Abraham D. Falcone, M. Kertzman, D. Horan, John L. Quinn, K. G. Gibbs, S. Gammell, T. N. Nagai, G. H. Gillanders
Publikováno v:
Department of Physics and Astronomy Faculty Publications
The Whipple Observatory 10 m γ-ray telescope has been used to survey the error boxes of EGRET unidentified sources in an attempt to find counterparts at energies of 350 GeV and above. Twenty-one unidentified sources detected by EGRET (more than 10%
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a6f38fa0ae1b1897c201924a8968a87
https://doi.org/10.1086/429123
https://doi.org/10.1086/429123
Can diffusive shock acceleration in supernova remnants account for high-energy galactic cosmic rays?
Autor:
A M Hillas
Publikováno v:
Journal of Physics G: Nuclear and Particle Physics. 31:R95-R131
Diffusive shock acceleration at the outer front of expanding supernova remnants has provided by far the most popular model for the origin of galactic cosmic rays, and has been the subject of intensive theoretical investigation. But several problems l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f235da094fa55041cceb4fb7f72c6d0
https://doi.org/10.1088/0954-3899/31/5/r02
https://doi.org/10.1088/0954-3899/31/5/r02
Spectrum of Very High Energy Gamma‐Rays from the blazar 1ES 1959+650 during Flaring Activity in 2002
Autor:
M. K. Daniel, H. M. Badran, I. H. Bond, P. J. Boyle, S. M. Bradbury, J. H. Buckley, D. A. Carter‐Lewis, M. Catanese, O. Celik, P. Cogan, W. Cui, M. D’Vali, I. de la Calle Perez, C. Duke, A. Falcone, D. J. Fegan, S. J. Fegan, J. P. Finley, L. F. Fortson, J. A. Gaidos, S. Gammell, K. Gibbs, G. H. Gillanders, J. Grube, J. Hall, T. A. Hall, D. Hanna, A. M. Hillas, J. Holder, D. Horan, T. B. Humensky, A. Jarvis, M. Jordan, G. E. Kenny, M. Kertzman, D. Kieda, J. Kildea, J. Knapp, K. Kosack, H. Krawczynski, F. Krennrich, M. J. Lang, S. Le Bohec, E. Linton, J. Lloyd‐Evans, A. Milovanovic, P. Moriarty, D. Muller, T. Nagai, S. Nolan, R. A. Ong, R. Pallassini, D. Petry, B. Power‐Mooney, J. Quinn, M. Quinn, K. Ragan, P. Rebillot, P. T. Reynolds, H. J. Rose, M. Schroedter, G. H. Sembroski, S. P. Swordy, A. Syson, V. V. Vassiliev, S. P. Wakely, G. Walker, T. C. Weekes, J. Zweerink
Publikováno v:
Department of Physics and Astronomy Faculty Publications
The blazar 1ES 1959+650 was observed in a flaring state with the Whipple 10 m Imaging Atmospheric Cherenkov Telescope during May of 2002. A spectral analysis has been carried out on the data from that time period and the resulting very high energy ga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9651a71bd5b26636fc1c4b0b8b76d80
https://doi.org/10.1086/427406
https://doi.org/10.1086/427406
Autor:
M. K. Daniel, S. P. Wakely, G. Walker, John Kildea, J. H. Buckley, David Kieda, Mark N. Quinn, A. Jarvis, S. M. Bradbury, S. P. Swordy, A. Milovanovic, Wei Cui, A. Syson, D. Horan, F. Krennrich, M. Schroedter, V. V. Vassiliev, Abraham D. Falcone, G. E. Kenny, H. J. Rose, R. Pallassini, Lucy Fortson, P. J. Boyle, E. Linton, D. S. Hanna, J. A. Gaidos, M. D'Vali, P. Moriarty, S. J. Nolan, M. Jordan, Jeffrey Zweerink, J. Hall, K. Ragan, Tony Hall, J. Knapp, K. Kosack, D. A. Carter-Lewis, D. Petry, J. Lloyd-Evans, Dietrich Müller, G. H. Gillanders, B. Power-Mooney, G. H. Sembroski, Jamie Holder, S. LeBohec, I. de la Calle Perez, I. H. Bond, M. J. Lang, S. J. Fegan, Henric Krawczynski, M. Kertzman, T. N. Nagai, J. Grube, P. Rebillot, P. T. Reynolds, J. P. Finley, C. Duke, T. C. Weekes, D. J. Fegan, John L. Quinn, K. G. Gibbs, R. A. Ong, S. Gammell, A. M. Hillas, O. Celik
Publikováno v:
New Astronomy Reviews. 48:345-349
The Very Energetic Radiation Imaging Telescope Array System (VERITAS) is the major next generation imaging atmospheric Cherenkov γ-ray telescope in the western hemisphere and will be located in southern Arizona nearby Kitt Peak National Observatory.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22dbf8af160abf64ca9bcba41c6ab670
https://doi.org/10.1016/j.newar.2003.12.050
https://doi.org/10.1016/j.newar.2003.12.050
Autor:
Vladimir Vassiliev, Dietrich Müller, Jamie Holder, S. M. Bradbury, Frank Krennrich, M. Kertzman, S. J. Fegan, A. M. Hillas, T. N. Nagai, John Kildea, D. J. Fegan, D. Horan, Wei Cui, M. Schroedter, J. Hall, S. Gammell, J. P. Finley, K. Kosack, J. Knapp, C. Duke, D. A. Carter-Lewis, T. C. Weekes, S. P. Swordy, R. A. Ong, Morgan T. Page, R. Sidwell, P. Moriarty, I. H. Bond, S. P. Wakely, S. LeBohec, N. Stanton, B. Power-Mooney, G. Walker, I. de la Calle Perez, D. Petry, Tony Hall, J. H. Buckley, J. A. Gaidos, David Kieda, G. H. Sembroski, R. Pallassini, M. Jordan, Abraham D. Falcone, H. J. Rose, N. W. Reay, John L. Quinn, K. G. Gibbs, P. T. Reynolds
Publikováno v:
The Astrophysical Journal. 580:104-109
The BL Lac object H1426+428 was recently detected as a high energy gamma-ray source by the VERITAS collaboration (Horan et al. 2002). We have reanalyzed the 2001 portion of the data used in the detection in order to examine the spectrum of H1426+428
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32eca071208c1e21af82dcc3aee86ec3
https://doi.org/10.1086/343102
https://doi.org/10.1086/343102