Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Bond, I. H."'
Autor:
Fossati, G., Buckley, J. H., Bond, I. H., Bradbury, S. M., Carter-Lewis, D. A., Chow, Y. C. K., Cui, W., Falcone, A. D., Finley, J. P., Gaidos, J. A., Grube, J., Holder, J., Horan, D., Horns, D., Jordan, M. M., Kieda, D. B., Kildea, J., Krawczynski, H., Krennrich, F., Lang, M. J., LeBohec, S., Lee, K., Moriarty, P., Ong, R. A., Petry, D., Quinn, J., Sembroski, G. H., Wakely, S. P., Weekes, T. C.
Publikováno v:
The Astrophysical Journal, 2008, 677, 906-925
(Abridged) We present a detailed analysis of week-long simultaneous observations of the blazar Mrk421 at 2-60 keV X-rays (RXTE) and TeV gamma-rays (Whipple and HEGRA) in 2001. The unprecedented quality of this dataset enables us to establish firmly t
Externí odkaz:
http://arxiv.org/abs/0710.4138
Mrk 421 is the first TeV blazar found to exhibit significant spectral variability during strong flaring activity, showing hardening of the TeV spectrum in high emission states. Mrk 421 is also known to exhibit flux variability on time scales as short
Externí odkaz:
http://arxiv.org/abs/astro-ph/0305419
Autor:
Krennrich, F., Bond, I. H., Bradbury, S. M., Buckley, J. H., Carter-Lewis, D. A., Cui, W., Perez, I. de la Calle, Falcone, A., Fegan, D. J., Fegan, S. J., Finley, J. P., Gaidos, J. A., Gibbs, K., Gillanders, G. H., Hall, T. A., Hillas, A. M., Holder, J., Horan, D., Jordan, M., Kertzman, M., Kieda, D., Kildea, J., Knapp, J., Kosack, K., Lang, M. J., LeBohec, S., Moriarty, P., Muller, D., Ong, R. A., Pallassini, R., Petry, D., Quinn, J., Reynolds, P. T., Rose, H. J., Sembroski, G. H., Swordy, S. P., Vassiliev, V. V., Wakely, S. P., Weekes, T. C.
A decade after the discovery of TeV gamma-rays from the blazar Mrk 421 (Punch et al. 1992), the list of TeV blazars has increased to five BL Lac objects: Mrk 421 (Punch et al. 1992; Petry et al. 1996; Piron et al. 2001), Mrk 501 (Quinn et al. 1996; A
Externí odkaz:
http://arxiv.org/abs/astro-ph/0212269
Autor:
Petry, D., Bond, I. H., Bradbury, S. M., Buckley, J. H., Carter-Lewis, D. A., Cui, W., Duke, C., Perez, I. de la Calle, Falcone, A., Fegan, D. J., Fegan, S. J., Finley, J. P., Gaidos, J. A., Gibbs, K., Gammell, S., Hall, J., Hall, T. A., Hillas, A. M., Holder, J., Horan, D., Jordan, M., Kertzman, M., Kieda, D., Kildea, J., Knapp, J., Kosack, K., Krennrich, F., LeBohec, S., Moriarty, P., Müller, D., Nagai, T. N., Ong, R., Page, M., Pallassini, R., Power-Mooney, B., Quinn, J., Reay, N. W., Reynolds, P. T., Rose, H. J., Schroedter, M., Sembroski, G. H., Sidwell, R., Stanton, N., Swordy, S. P., Vassiliev, V. V., Wakely, S. P., Walker, G., Weekes, T. C.
Publikováno v:
Astrophys.J.580:104-109,2002
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:
http://arxiv.org/abs/astro-ph/0207506
Autor:
Krennrich, F., Bond, I. H., Bradbury, S. M., Buckley, J. H., Carter-Lewis, D. A., Cui, W., Perez, I. de la Calle, Fegan, D. J., Fegan, S. J., Finley, J. P., Gaidos, J. A., Gibbs, K., Gillanders, G. H., Hall, T. A., Hillas, A. M., Holder, J., Horan, D., Jordan, M., Kertzman, M., Kieda, D., Kildea, J., Knapp, J., Kosack, K., Lang, M. J., LeBohec, S., Moriarty, P., Müller, D., Ong, R. A., Pallassini, R., Petry, D., Quinn, J., Reay, N. W., Reynolds, P. T., Rose, H. J., Sembroski, G. H., Sidwell, R., Stanton, N., Swordy, S. P., Vassiliev, V. V., Wakely, S. P., Weekes, T. C.
Publikováno v:
Astrophys.J.575:L9-L14,2002
The detection of spectral variability of the gamma-ray blazar Mrk 421 at TeV energies is reported. Observations with the Whipple Observatory 10m gamma-ray telescope taken in 2000/2001 revealed exceptionally strong and long-lasting flaring activity. F
Externí odkaz:
http://arxiv.org/abs/astro-ph/0207184
Autor:
Krennrich, F., Badran, H. M., Bond, I. H., Bradbury, S. M., Buckley, J. H., Carter-Lewis, D. A., Catanese, M., Cui, W., Dunlea, S., Das, D., Perez, I. de la Calle, Fegan, D. J., Fegan, S. J., Finley, J. P., Gaidos, J. A., Gibbs, K., Gillanders, G. H., Hall, T. A., Hillas, A. M., Holder, J., Horan, D., Jordan, M., Kertzman, M., Kieda, D., Kildea, J., Knapp, J., Kosack, K., Lang, M. J., LeBohec, S., McKernan, B., Moriarty, P., Müller, D., Ong, R., Pallassini, R., Petry, D., Quinn, J., Reay, N. W., Reynolds, P. T., Rose, H. J., Sembroski, G. H., Sidwell, R., Stanton, N., Swordy, S. P., Vassiliev, V. V., Wakely, S. P., Weekes, T. C.
Publikováno v:
Astrophys.J.560:L45-L48,2001
Exceptionally strong and long lasting flaring activity of the blazar Markarian 421 (Mrk 421) occurred between January and March 2001. Based on the excellent signal-to-noise ratio of the data we derive the energy spectrum between 260 GeV - 17 TeV with
Externí odkaz:
http://arxiv.org/abs/astro-ph/0107113
Autor:
LeBohec, S., Bond, I. H., Bradbury, S. M., Buckley, J. H., Burdett, A. M., Carter-Lewis, D. A., Catanese, M., Cawley, M. F., Dunlea, S., D'Vali, M., Fegan, D. J., Fegan, S. J., Finley, J. P., Gaidos, J. A., Hall, T. A., Hillas, A. M., Horan, D., Knapp, J., Krennrich, F., Lessard, R. W., Macomb, D., Masterson, C., Quinn, J., Rose, H. J., Samuelson, F. W., Sembroski, G. H., Vassiliev, V. V., Weekes, T. C.
Publikováno v:
Astrophys.J. 539 (2000) 209-215
In 1998 and 1999 the Whipple Observatory 10 m telescope was used to search for diffuse gamma ray emission from the Galactic Plane. No signifiant evidence of emission was found. Assuming the TeV emission profile matches EGRET observations above 1 GeV
Externí odkaz:
http://arxiv.org/abs/astro-ph/0003265
Autor:
Lessard, R. W., Bond, I. H., Bradbury, S. M., Buckley, J. H., Burdett, A. M., Carter-Lewis, D. A., Catanese, M., Cawley, M. F., D'Vali, M., Fegan, D. J., Finley, J. P., Gaidos, J. A., Gillanders, G. H., Hall, T., Hillas, A. M., Krennrich, F., Lang, M. J., Masterson, C., Moriarty, P., Quinn, J., Rose, H. J., Samuelson, F. W., Sembroski, G. H., Srinivasan, R., Vassiliev, V. V., Weekes, T. C.
We present the results of a search for pulsed TeV emission from the Crab pulsar using the Whipple Observatory's 10 m gamma-ray telescope. The direction of the Crab pulsar was observed for a total of 73.4 hours between 1994 November and 1997 March. Du
Externí odkaz:
http://arxiv.org/abs/astro-ph/9912520
Autor:
D'Vali, M., Bond, I. H., Bradbury, S. M., Buckley, J. H., Burdett, A. M., Carter-Lewis, D. A., Catanese, M., Cawley, M. F., Fegan, D. J., Fegan, S. J., Finley, J. P., Gaidos, J. A., Hall, T. A., Hillas, A. M., Knapp, J., Krennrich, F., Bohec, S. Le, Lessard, R. W., Masterson, C., Myles, S. D., Quinn, J., Rose, H. J., Samuelson, F. W., Sembroski, G. H., Vassiliev, V. V., Weekes, T. C.
Only BL Lac objects have been detected as extragalactic sources of very high energy (E > 300 GeV) gamma rays. Using the Whipple Observatory Gamma-ray Telescope, we have attempted to detect more BL Lacs using three approaches. First, we have conducted
Externí odkaz:
http://arxiv.org/abs/astro-ph/9907263
Autor:
Bradbury, S. M., Bond, I. H., Breslin, A. C., Buckley, J. H., Carter-Lewis, D. A., Catanese, M., Criswell, S., Dingus, B. L., Fegan, D. J., Finley, J. P., Gaidos, J., Grindlay, J., Hillas, A. M., Harris, K., Hermann, G., Kaaret, P., Kieda, D., Knapp, J., Krennrich, F., LeBohec, S., Lessard, R. W., Lloyd-Evans, J., McKernan, B., Mueller, D., Ong, R., Quenby, J. J., Quinn, J., Rochester, G., Rose, H. J., Salamon, M., Sembroski, G. H., Sumner, T., Swordy, S., Vassiliev, V. V., Weekes, T. C.
Publikováno v:
AIP Conf.Proc.510:637-641,2004
We give an overview of the current status and scientific goals of VERITAS, a proposed hexagonal array of seven 10 m aperture imaging Cherenkov telescopes. The selected site is Montosa Canyon (1390 m a.s.l.) at the Whipple Observatory, Arizona. Each t
Externí odkaz:
http://arxiv.org/abs/astro-ph/9907248