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1. VERITAS: status c.2005

Author

S. M. Bradbury, D. A. Carter-Lewis, S. P. Swordy, K. J. Guitterez, V. V. Vassiliev, M. Schroedter, F. Pizlo, G. E. Kenny, P. A. Ogden, Paul Dowkontt, Reshmi Mukherjee, E. Linton, H. M. Badran, J. Hall, Y. C. Chow, Tony Hall, T. B. Humensky, B. Power-Mooney, P. Fortin, H. J. Rose, Tulun Ergin, I. de la Calle Perez, David R. Williams, Henric Krawczynski, T. N. Nagai, Wei Cui, A. Milovanovic, D. Kiedai, D. S. Hanna, J. S. Perkins, Dirk Petry, John L. Quinn, K. Kosack, K. G. Gibbs, J. Knapp, A. M. Hillas, John Kildea, R. G. Wagner, D. Horan, M. J. Lang, K. L. Bryum, Lucy Fortson, P. T. Reynolds, P. Kaaret, M. K. Daniel, A. D. Falcone, A. Syson, P. J. Boyle, L. Valcarcel, G. H. Gillanders, C. Dowdall, S. Gammell, E. Hays, P. Moriarty, Gernot Maier, J. Grube, J. Lloyd-Evans, D. Steele, R. A. Ong, G. H. Sembroski, H. Manseri, S. P. Wakely, G. Walker, S. LeBohec, C. Duke, J. P. Finley, J. A. Toner, T. C. Weekes, S. B. Hughes, M. Pohl, J. A. Zweerink, K. Ragan, P. Rebillot, M. A. Olevitch, Jamie Holder, Mark N. Quinn, D. J. Fegan, M. Kertzmann, I. H. Bond, S. J. Fegan, P. Cogan, R. W. Atkins, R. J. White, Omer Celik, G. Blaylock, J. H. Buckley, and F. Krennrich

Subjects
Computer science, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Radiation imaging, Astronomy, Cosmic ray, Gamma-ray astronomy, law.invention, Telescope, law, Astrophysics::Solar and Stellar Astrophysics, Astronomical telescopes, Gamma detection, Astrophysics::Galaxy Astrophysics, Cherenkov radiation, Gamma ray detection
Abstract

VERITAS (Very Energetic Radiation Imaging Telescope Array System), is one of a new generation of TeV gamma‐ray observatories. The current status of its construction is described here. The first two telescopes and cameras have been completed and meet the design specifications; the full array of four telescopes could be operational by the end of 2006.

Published
2006

2. The VERITAS Prototype and the Upcoming VERITAS Array

Author

Abe D. Falcone, S. Gammell, G. E. Kenny, T. B. Humensky, K. L. Byrum, P. Cogan, H. J. Rose, Wei Cui, L. Valcarcel, G. H. Sembroski, P. J. Boyle, S. P. Wakely, J. P. Finley, J. H. Buckley, J. Hall, I. de la Calle Perez, I. Jung, G. Walker, K. J. Guiterrez, T. C. Weekes, B. Power-Mooney, G. H. Gillanders, R. Pallassini, Dirk Petry, T. N. Nagai, A. Milovanovic, D. Horan, J. Knapp, Henric Krawczynski, S. J. Fegan, A. Merriman, John Kildea, C. Duke, K. Kosack, Paul Dowkontt, M. K. Daniel, S. B. Hughes, M. Pohl, R. A. Ong, D. S. Hanna, J. Lloyd-Evans, D. A. Carter-Lewis, F. Krennrich, Mark N. Quinn, I. H. Bond, S. Le Bohec, Lucy Fortson, M. Kertzman, H. M. Badran, S. M. Bradbury, P. Moriarty, J. Grube, J. S. Perkins, M. J. Lang, R. L. Wagner, A. Syson, V. V. Vassiliev, P. T. Reynolds, F. Pizlo, Omer Celik, G. Blaylock, John L. Quinn, K. G. Gibbs, E. Linton, David Kieda, S. P. Swordy, M. Schroedter, D. J. Fegan, M. A. Olevitch, Jamie Holder, D. Mendoza, J. A. Zweerink, K. Ragan, P. Rebillot, and R. J. White

Subjects
Telescope, Physics, law, Astronomy, Astronomical telescopes, Cherenkov Telescope Array, law.invention, Remote sensing
Abstract

The prototype for the VERITAS imaging atmospheric Cherenkov telescope array was successfully operated in southern Arizona between September 2003 and April 2004. The prototype consisted of 86 mirror facets mounted centrally on a 12‐meter dish, which was built to accommodate up to 350 facets when converted to a complete VERITAS telescope. The camera consisted of half of the full 499 pixel camera. The signal and trigger electronics were nearly identical to those that will be used for the individual VERITAS array telescopes. By observing the Crab and Mrk421, as well as performing a variety of tests, the characteristics of the instrument were evaluated. The prototype met all performance expectations and served as a valuable test bed for the current design, as well as for the construction and operation of VERITAS. This prototype instrument is now being upgraded to a complete VERITAS telescope that will be operated during the construction of the full VERITAS array. The array is expected to be operational by November 2006.

Published
2005

3. Very High Energy Observations of Gamma Ray Bursts with the Whipple/VERITAS Telescopes

Author

M. J. Lang, I. Jung, A. D. Falcone, J. Knapp, J. H. Buckley, B. Power-Mooney, John Kildea, A. Milovanovic, R. A. Ong, R. Pallassini, D. Horan, I. H. Bond, Omer Celik, John L. Quinn, M. K. Daniel, R. L. Wagner, A. Syson, K. L. Byrum, L. Valcarcel, S. B. Hughes, M. Pohl, K. G. Gibbs, H. M. Badran, H. J. Rose, G. Blaylock, S. P. Swordy, G. E. Kenny, Jamie Holder, P. J. Boyle, S. Gammell, M. Schroedter, S. Le Bohec, A. Merriman, Wei Cui, F. Krennrich, T. B. Humensky, M. Kertzman, J. P. Finley, Dirk Petry, D. Mendoza, J. A. Zweerink, D. B. Kieda, T. C. Weekes, D. J. Fegan, K. Ragan, D. S. Hanna, S. M. Bradbury, P. Cogan, E. Linton, P. Rebillot, R. J. White, V. V. Vassiliev, Mark N. Quinn, K. J. Guiterrez, S. J. Fegan, P. T. Reynolds, D. A. Carter-Lewis, P. Moriarty, J. Grube, C. Duke, J. Hall, I. de la Calle Perez, T. N. Nagai, K. Kosack, Henric Krawczynski, J. Lloyd-Evans, J. S. Perkins, G. H. Sembroski, G. H. Gillanders, Lucy Fortson, S. P. Wakely, and G. Walker

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, Astronomy, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Afterglow, law.invention, Telescope, Supernova, law, Observatory, Spectral energy distribution, Blazar, Gamma-ray burst, Astrophysics::Galaxy Astrophysics
Abstract

Gamma‐ray Burst (GRB) observations at Very High Energies (VHE, E > 100 GeV) can impose tight constraints on some GRB emission models. Many GRB after‐glow models predict a VHE component similar to that seen in blazars and supernova remnants, in which the GRB spectral energy distribution has a double‐peaked shape extending into the VHE regime. Consistent with this afterglow scenario, EGRET detected delayed high energy emission from all five bright BATSE GRBs that occurred within its field of view. GRB observations have had high priority in the observing program at the Whipple 10m Telescope and will continue to be high priority targets when the next generation observatory VERITAS comes online. Upper limits on the VHE emission from ten GRBs observed with the Whipple Telescope are reported here.

Published
2005

4. Recent Observations of IC443 with the Whipple 10m Telescope

Author

Dirk Petry, D. A. Carter-Lewis, R. J. White, E. Linton, J. P. Finley, T. C. Weekes, S. Le Bohec, Omer Celik, M. Kertzman, G. Blaylock, L. Valcarcel, C. Duke, D. Horan, Mark N. Quinn, D. Mendoza, J. A. Zweerink, R. L. Wagner, R. Pallassini, Lucy Fortson, P. Moriarty, A. Milovanovic, A. Syson, J. Grube, J. Knapp, K. Ragan, Wei Cui, M. J. Lang, P. Rebillot, G. H. Sembroski, P. T. Reynolds, J. Lloyd-Evans, J. Hall, S. B. Hughes, A. Merriman, M. Pohl, I. de la Calle Perez, F. Krennrich, Henric Krawczynski, A. D. Falcone, I. H. Bond, John L. Quinn, D. J. Fegan, J. H. Buckley, P. Cogan, K. G. Gibbs, I. Jung, J. S. Perkins, S. M. Bradbury, M. K. Daniel, V. V. Vassiliev, H. J. Rose, K. J. Guiterrez, S. J. Fegan, T. N. Nagai, K. Kosack, H. M. Badran, R. A. Ong, S. Gammell, G. E. Kenny, P. J. Boyle, T. B. Humensky, David Kieda, D. S. Hanna, Jamie Holder, K. L. Byrum, B. Power-Mooney, S. P. Wakely, G. Walker, John Kildea, S. P. Swordy, M. Schroedter, and G. H. Gillanders

Subjects
Telescope, Physics, Nebula, law, Molecular cloud, Astronomy, Cosmic ray, Astrophysics, Maser, Supernova remnant, Gamma-ray burst, Cherenkov radiation, law.invention
Abstract

We present here the results of recent observations made with the Whipple 10m imaging Cherenkov telescope of the region of the supernova remnant IC443. No evidence for gamma‐ray emission was found, and we obtain an upper limit above 500 GeV (99.9% confidence) of 0.6 × 10−7 ph m−2 s−1 (0.11 Crab) at the location of the recently identified X‐ray plerion nebula and 0.8 × 10−7 ph m−2 s−1 (0.14 Crab) at the site of the OH maser at the densest part of the molecular cloud.

Published
2005

5. Recent results from Fermilab E791

Author

S. B. Bracker, Daniel Ashery, T. Dubbs, N. R. Stanton, M. Aryal, H. A. Rubin, A. J. Slaughter, S. Watanabe, C. Zhang, T. Carter, J. Wiener, D. C. Langs, R. Weiss, S. MayTal-Beck, S. Radeztsky, A. Nguyen, A. Napier, K. Denisenko, D. Yi, M. V. Purohit, A.K.S. Santha, M. Sheaff, B. T. Meadows, M. D. Sokoloff, J. G. Smith, B. P. Quinn, A. C. dos Reis, J.J. Reidy, Ignacio Bediaga, B. Lundberg, Hermes Carvalho, D. J. Summers, R. A. Sidwell, I. Costa, S. Amato, J. Lichtenstadt, K. Gounder, L. Perera, J. M. De Miranda, K. Thorne, A.B. d'Oliveira, E.M. Aitala, G. Hurwitz, A. Álvarez Fernández, L. M. Cremaldi, E. Wolin, J. R. T. de Mello Neto, Patricia R. Burchat, J. A. Appel, A. K. Tripathi, K. C. Peng, D. Granite, M. Halling, N. Witchey, C. James, S. Takach, P.A. Kasper, A. J. Schwartz, P. Gagnon, G. Herrera, R. Zaliznyak, S. Gerson, N. W. Reay, C. L. Darling, J. Leslie, R. H. Milburn, Simon Kwan, K. O'Shaughnessy, Alberto Santoro, R. A. Burnstein, A. Rafatian, J. C. Anjos, G. Blaylock, K. Sugano, and S. Banerjee

Subjects
Nuclear physics, Physics, Particle decay, Pion, Meson, Branching fraction, Flavor-changing neutral current, High Energy Physics::Experiment, Charm (quantum number), Fermilab, Lepton
Abstract

Fermilab E791 is a high statistics charm experiment using a 500 GeV/c π− beam incident on a segmented target. We present results based on one third of the 1991‐1992 data, with particular emphasis on a search for the flavor changing neutral current decay D+→π+μ+μ−.

Published
1995

6. Fermilab E791

Author

L. M. Cremaldi, E. M. Aitala, F. M. L. Almeida, S. Amato, J. C. Anjos, J. A. Appel, D. Ashery, J. Astorga, S. Banerjee, S. Beck, I. Bediaga, G. Blaylock, S. B. Bracker, P. R. Burchat, R. Burnstein, T. Carter, I. Costa, K. Denisenko, C. Darling, P. Gagnon, S. Gerzon, K. Gounder, D. Granite, M. Halling, C. James, P. A. Kasper, S. Kwan, J. Lichtenstadt, B. Lundberg, J. R. T. de Mello Neto, R. Milburn, J. M. de Miranda, A. Napier, A. Nguyen, A. B. d’Oliveira, K. C. Peng, M. V. Purohit, B. Quinn, S. Radeztsky, A. Rafatian, A. J. Ramalho, N. W. Reay, K. Reibel, J. J. Reidy, H. Rubin, A. Santha, A. F. S. Santoro, A. Schwartz, M. Sheaff, R. A. Sidwell, H. da Silva Carvalho, J. Slaughter, M. D. Sokoloff, M. Souza, N. Stanton, K. Sugano, D. J. Summers, S. Takach, K. Thorne, A. Tripathi, D. Trumer, S. Watanabe, J. Wiener, N. Witchey, E. Wolin, and D. Yi

Subjects
Physics, Particle physics, Photon, High Energy Physics::Experiment, Charm (quantum number), Fermilab, High Energy Physics - Experiment
Abstract

Fermilab E791, a very high statistics charm particle experiment, recently completed its data taking at Fermilab's Tagged Photon Laboratory. Over 20 billion events were recorded through a loose transverse energy trigger and written to 8mm tape in the the 1991-92 fixed target run at Fermilab. This unprecedented data sample containing charm is being analysed on many-thousand MIP RISC computing farms set up at sites in the collaboration. A glimpse of the data taking and analysis effort is presented. We also show some preliminary results for common charm decay modes. Our present analysis indicates a very rich yield of over 200K reconstructed charm decays., Comment: 4 pages, 1 figure, LaTeX

Published
1992

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