Zobrazeno 1 - 10
of 36
pro vyhledávání: '"R. W. Lessard"'
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:
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%
Publikováno v:
Astroparticle Physics. 17:427-440
We present a new method of image cleaning for imaging atmospheric Cherenkov telescopes. The method is based on the utilization of wavelets to identify noise pixels in images of gamma-ray and hadronic induced air showers. This method selects more sign
Autor:
E. Colombo, J. P. Finley, G. H. Gillanders, J. H. Buckley, P. Moriarty, T. C. Weekes, M. Kertzman, F. Krennrich, M. J. Lang, J. A. Gaidos, Valerie Connaughton, John L. Quinn, M. Catanese, G. H. Sembroski, M. F. Cawley, H. J. Rose, R. W. Lessard, D. J. Fegan, D. A. Carter-Lewis, A. M. Hillas
Publikováno v:
Astroparticle Physics. 9:203-211
We have observed the cataclysmic variable AE Aqr for a total of 68.7 hours over the epoch 1991–1995 using the Whipple Observatory 10 m gamma-ray telescope. An analysis of these data has revealed no evidence for any steady, pulsed or episodic TeV em
Autor:
G. H. Sembroski, R. W. Lessard, D. A. Carter-Lewis, R. C. Lamb, S. M. Bradbury, P. J. Boyle, J. A. Gaidos, J. P. Finley, John L. Quinn, T. C. Weekes, J. H. Buckley, I. H. Bond, A. M. Hillas, S. D. Biller, A. M. Burdett, Raghavan Srinivasan, F. Krennrich, A. C. Breslin, J. Zweerink, H. J. Rose, M. Catanese, M. F. Cawley, J. E. McEnery, A. J. Rodgers, D. J. Fegan, V.V. Vassiliev, J. Bussons Gordo, C. Masterson, Tony Hall, Frank W. Samuelson
Publikováno v:
The Astrophysical Journal. 501:L17-L20
The energy spectrum of the active galactic nucleus Markarian 501 has been determined from 0.3 to 10 TeV with the Whipple Observatory Cerenkov Imaging Telescope, by using both small zenith angle and large zenith angle data taken between 1997 February
Autor:
J. Zweerink, G. Mohanty, S. Biller, Carl W. Akerlof, A. M. Hillas, D. J. Fegan, M. Catanese, Michael Schubnell, D. A. Carter-Lewis, R. W. Lessard, J. E. McEnery, John L. Quinn, J. A. Gaidos, G. H. Sembroski, Valerie Connaughton, R. C. Lamb, P. J. Boyle, N. A. Porter, J. H. Buckley, Raghavan Srinivasan, Christine D. Wilson, H. J. Rose, M. F. Cawley, J. P. Finley, T. C. Weekes
Publikováno v:
Astroparticle Physics. 8:179-191
Although atmospheric Cherenkov telescopes have restricted fields of view, their fluence sensitivity warrants a search for gamma-ray burst phenomena. A search for 400 GeV gamma-ray bursts on a 1 s time-scale using archival data taken between 1988 and
Autor:
G. Mohanty, J. H. Buckley, Frank W. Samuelson, Raghavan Srinivasan, M. Cantanese, F. Krennrich, A. C. Breslin, A. M. Hillas, J. Zweerink, H. J. Rose, A. J. Rodgers, M. F. Cawley, Valerie Connaughton, C. Masterson, P. J. Boyle, Christine D. Wilson, G. H. Sembroski, John L. Quinn, Carl W. Akerlof, R. C. Lamb, D. A. Carter-Lewis, D. J. Fegan, R. W. Lessard, J. E. McEnery, Michael Schubnell, J. Bussons Gordo, P. Moriarty, J. A. Gaidos, J. P. Finley, T. C. Weekes, S. Biller
Publikováno v:
Advances in Space Research. 21:101-107
We report on observations of Mrk 421 and Mrk 501 at E γ >300 GeV during the 1995 and 1996 seasons. A multiwavelength observing campaign on Mrk 421 in the period 1995 April 20 to May 5 indicates correlations in the γ-ray, X-ray, extreme ultraviolet,
Autor:
A. J. Rodgers, S. Biller, J. Zweerink, Frank W. Samuelson, J. Bussons Gordo, Michael Schubnell, R. C. Lamb, J. H. Buckley, A. M. Hillas, D. A. Carter-Lewis, A. M. Burdett, J. A. Gaidos, Raghavan Srinivasan, F. Krennrich, M. Catanese, P. J. Boyle, D. J. Fegan, G. H. Sembroski, J. P. Finley, T. C. Weekes, Christine D. Wilson, Carl W. Akerlof, G. Mohanty, M. F. Cawley, John L. Quinn, R. W. Lessard, J. E. McEnery, H. J. Rose
Publikováno v:
The Astrophysical Journal. 490:L141-L144
We present the gamma-ray spectrum of the BL Lacertae object, Markarian 421, above 500 GeV during its most intense recorded TeV flare, on 1996 May 7. The spectrum is well fitted by a power law with an exponent of 22.5650.0750.1 (statistical and system
Autor:
A. M. Hillas, S. Biller, D. A. Carter-Lewis, J. P. Finley, R. W. Lessard, J. E. McEnery, T. C. Weekes, C. E. Fichtel, John L. Quinn, E. I. Robson, Christine D. Wilson, M. Catanese, H. J. Rose, D. J. Fegan, J. Zweerink, P. J. Boyle, Frank W. Samuelson, Brenda Dingus, G. H. Sembroski, Valerie Connaughton, Harri Teräsranta, Reshmi Mukherjee, Jamie Stevens, Michael Schubnell, Carl W. Akerlof, J. A. Gaidos, R. C. Lamb, A. J. Rodgers, G. Mohanty, J. H. Buckley, F. Krennrich, M. F. Cawley, Walter Kieran Gear, Alan P. Marscher, R. C. Hartman, D. J. Thompson, Yiing Lin
Publikováno v:
The Astrophysical Journal. 480:562-567
We present evidence for the first detection of gamma rays from the extragalactic object BL Lacertae. Observations taken with EGRET on the Compton Gamma Ray Observatory between 1995 January 24 and 1995 February 14 indicate a 4.4 σ excess from the dir