Search

Your search keyword '"James H. Buckley"' showing total 14 results
Start Over Author "James H. Buckley"
14 results on '"James H. Buckley"'

9. Design and performance of the prototype Schwarzschild-Couder telescope camera

Author

Colin B. Adams, Giovanni Ambrosi, Michelangelo Ambrosio, Carla Aramo, Timothy Arlen, Wystan Benbow, Bruna Bertucci, Elisabetta Bissaldi, Jonathan Biteau, Massimiliano Bitossi, Alfonso Boiano, Carmela Bonavolontà, Richard Bose, Aurelien Bouvier, Mario Buscemi, Aryeh Brill, Anthony M. Brown, James H. Buckley, Rodolfo Canestrari, Massimo Capasso, Mirco Caprai, Paolo Coppi, Corbin E. Covault, Davide Depaoli, Leonardo Di Venere, Manel Errando, Stephan Fegan, Qi Feng, Emanuele Fiandrini, Amy Furniss, Markus Garczarczyk, Alasdair Gent, Nicola Giglietto, Francesco Giordano, Enrico Giro, Robert Halliday, Olivier Hervet, Gareth Hughes, Simone Incardona, Thomas B. Humensky, Maria Ionica, Weidong Jin, Caitlin A. Johnson, David Kieda, Frank Krennrich, Andrey Kuznetsov, Jon Lapington, Francesco Licciulli, Serena Loporchio, Giovanni Marsella, Vincenzo Masone, Kevin Meagher, Thomas Meures, Brent A. W. Mode, Samuel A. I. Mognet, Reshmi Mukherjee, Akira Okumura, Francesca R. Pantaleo, Riccardo Paoletti, Federico Di Pierro, Deivid Ribeiro, Luca Riitano, Emmet Roache, Duncan Ross, Julien Rousselle, Andrea Rugliancich, Marcos Santander, Michael Schneider, Harm Schoorlemmer, Ruo-Yu Shang, Brandon Stevenson, Leonardo Stiaccini, Hiroyasu Tajima, Leslie P. Taylor, Julian Thornhill, Luca Tosti, Giovanni Tripodo, Valerio Vagelli, Massimo Valentino, Justin Vandenbroucke, Vladimir V. Vassiliev, Scott P. Wakely, Jason J. Watson, Richard White, Patrick Wilcox, David A. Williams, Matthew Wood, Peter Yu, Adrian Zink, Adams C.B., Ambrosi G., Ambrosio M., Aramo C., Arlen T., Benbow W., Bertucci B., Bissaldi E., Biteau J., Bitossi M., Boiano A., Bonavolonta C., Bose R., Bouvier A., Buscemi M., Brill A., Brown A.M., Buckley J.H., Canestrari R., Capasso M., Caprai M., Coppi P., Covault C.E., Depaoli D., Di Venere L., Errando M., Fegan S., Feng Q., Fiandrini E., Furniss A., Garczarczyk M., Gent A., Giglietto N., Giordano F., Giro E., Halliday R., Hervet O., Hughes G., Incardona S., Humensky T.B., Ionica M., Jin W., Johnson C.A., Kieda D., Krennrich F., Kuznetsov A., Lapington J., Licciulli F., Loporchio S., Marsella G., Masone V., Meagher K., Meures T., Mode B.A.W., Mognet S.A.I., Mukherjee R., Okumura A., Pantaleo F.R., Paoletti R., Di Pierro F., Ribeiro D., Riitano L., Roache E., Ross D., Rousselle J., Rugliancich A., Santander M., Schneider M., Schoorlemmer H., Shang R.-Y., Stevenson B., Stiaccini L., Tajima H., Taylor L.P., Thornhill J., Tosti L., Tripodo G., Vagelli V., Valentino M., Vandenbroucke J., Vassiliev V.V., Wakely S.P., Watson J.J., White R., Wilcox P., Williams D.A., Wood M., Yu P., and Zink A.

Subjects
imaging atmospheric Cherenkov telescopes, instrumentation, Physics - Instrumentation and Detectors, very-high-energy gamma-ray astronomy, Physics::Instrumentation and Detectors, Mechanical Engineering, Settore FIS/01 - Fisica Sperimentale, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Electronic, Optical and Magnetic Materials, Cherenkov telescope array, Space and Planetary Science, Control and Systems Engineering, ddc:530, prototype Schwarzschild-Couder telescope, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), silicon photomultipliers
Abstract

Journal of astronomical telescopes, instruments, and systems 8(01), 014007-1 (2022). doi:10.1117/1.JATIS.8.1.014007, The prototype Schwarzschild-Couder Telescope (pSCT) is a candidate for a medium-sized telescope in the Cherenkov Telescope Array. The pSCT is based on a novel dual mirror optics design which reduces the plate scale and allows for the use of silicon photomultipliers as photodetectors. The prototype pSCT camera currently has only the central sector instrumented with 25 camera modules (1600 pixels), providing a 2.68$^{\circ}$ field of view (FoV). The camera electronics are based on custom TARGET (TeV array readout with GSa/s sampling and event trigger) application specific integrated circuits. Field programmable gate arrays sample incoming signals at a gigasample per second. A single backplane provides camera-wide triggers. An upgrade of the pSCT camera is in progress, which will fully populate the focal plane. This will increase the number of pixels to 11,328, the number of backplanes to 9, and the FoV to 8.04$^{\circ}$. Here we give a detailed description of the pSCT camera, including the basic concept, mechanical design, detectors, electronics, current status and first light., Published by SPIE, [Bellingham, Wash.]

Published
2022
Full Text
View/download PDF

12. UBVRI Light Curves of 44 Type Ia Supernovae

Author

Saurabh Jha, Robert P. Kirshner, Peter Challis, Peter M. Garnavich, Thomas Matheson, Alicia M. Soderberg, Genevieve J. M. Graves, Malcolm Hicken, João F. Alves, Héctor G. Arce, Zoltan Balog, Pauline Barmby, Elizabeth J. Barton, Perry Berlind, Ann E. Bragg, César Briceño, Warren R. Brown, James H. Buckley, Nelson Caldwell, Michael L. Calkins, Barbara J. Carter, Kristi Dendy Concannon, R. Hank Donnelly, Kristoffer A. Eriksen, Daniel G. Fabricant, Emilio E. Falco, Fabrizio Fiore, Michael R. Garcia, Mercedes Gómez, Norman A. Grogin, Ted Groner, Paul J. Groot, Karl E. Haisch, Jr., Lee Hartmann, Carl W. Hergenrother, Matthew J. Holman, John P. Huchra, Ray Jayawardhana, Diab Jerius, Sheila J. Kannappan, Dong-Woo Kim, Jan T. Kleyna, Christopher S. Kochanek, Daniel M. Koranyi, Martin Krockenberger, Charles J. Lada, Kevin L. Luhman, Jane X. Luu, Lucas M. Macri, Jeff A. Mader, Andisheh Mahdavi, Massimo Marengo, Brian G. Marsden, Brian A. McLeod, Brian R. McNamara, S. Thomas Megeath, Dan Moraru, Amy E. Mossman, August A. Muench, Jose A. Muñoz, James Muzerolle, Orlando Naranjo, Kristin Nelson-Patel, Michael A. Pahre, Brian M. Patten, James Peters, Wayne Peters, John C. Raymond, Kenneth Rines, Rudolph E. Schild, Gregory J. Sobczak, Timothy B. Spahr, John R. Stauffer, Robert P. Stefanik, Andrew H. Szentgyorgyi, Eric V. Tollestrup, Petri Väisänen, Alexey Vikhlinin, Zhong Wang, S. P. Willner, Scott J. Wolk, Joseph M. Zajac, Ping Zhao, and Krzysztof Z. Stanek

Subjects
Physics, Ciencias Físicas, Astronomy, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, PHOTOMETRIC [TECHNIQUES], Light curve, Redshift, Large sample, GENERAL [SUPERNOVAE], Photometry (optics), Astronomía, Supernova, Space and Planetary Science, Observatory, Supernova Legacy Survey, SURVEYS, CIENCIAS NATURALES Y EXACTAS
Abstract

We present UBVRI photometry of 44 type-Ia supernovae (SN Ia) observed from 1997 to 2001 as part of a continuing monitoring campaign at the Fred Lawrence Whipple Observatory of the Harvard-Smithsonian Center for Astrophysics. The data set comprises 2190 observations and is the largest homogeneously observed and reduced sample of SN Ia to date, nearly doubling the number of well-observed, nearby SN Ia with published multicolor CCD light curves. The large sample of U-band photometry is a unique addition, with important connections to SN Ia observed at high redshift. The decline rate of SN Ia U-band light curves correlates well with the decline rate in other bands, as does the U-B color at maximum light. However, the U-band peak magnitudes show an increased dispersion relative to other bands even after accounting for extinction and decline rate, amounting to an additional ~40% intrinsic scatter compared to B-band., 84 authors, 71 pages, 51 tables, 10 figures. Accepted for publication in the Astronomical Journal. Version with high-res figures and electronic data at http://astron.berkeley.edu/~saurabh/cfa2snIa/

Published
2006

13. Very high energy gamma rays from blazars

Author

James H. Buckley

Subjects
Physics, Active galactic nucleus, Radio galaxy, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astronomy, Quasar, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Astrophysical jet, Intergalactic travel, Blazar, Gamma-ray burst, Astrophysics::Galaxy Astrophysics
Abstract

Very high energy (GeV to TeV) γ-ray observations provide a new spectral window on high energy astrophysical phenomena. VHE gamma-ray observations of the BL Lacs Mrk 421 and Mrk 501 have provided new information about the nature of the relativistic jets in these objects and the origin of the nonthermal emission. These sources also provide probes of the radiation fields in the nuclear region of these active galaxies and in intergalactic space. Observations of sub-hour-scale TeV, flares provide constraints on the emission mechanism, and on any energy dependent dispersion in the velocity of light. This paper summarizes the status of VHE γ-ray observations of blazars and highlights some of the most important recent measurements.

Published
2001
Full Text
View/download PDF

14. Gamma ray astronomy

Author

James H. Buckley

Subjects
Physics, X-ray astronomy, Galactic astronomy, High-energy astronomy, Astrophysics::High Energy Astrophysical Phenomena, Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Gamma-ray astronomy, Observatory, Blazar, Gamma-ray burst, Astrophysics::Galaxy Astrophysics, Fermi Gamma-ray Space Telescope
Abstract

This paper summarizes recent results in X-ray and γ-ray astronomy including measurements of galactic and extragalactic sources from 0.1 keV to 20 GeV from space, measurements of γ-rays at energies above 70 GeV from the ground as well as theoretical models for the emission of γ-rays and X-rays in galactic and extragalactic sources. The majority of the new results presented at this conference were made with ground-based γ-ray detectors, with relatively few new results from the Compton Gamma-ray Observatory (CGRO) and other space-based instruments. Many of the results involve multiwavelength studies which combine ground-based γ-ray measurements with space based X-ray and γ-ray measurements. The main topics covered in this paper include observations of diffuse γ-ray emission from the galaxy, observations of blazars, γ-ray bursts, supernova remnants and pulsars as well as theoretical models for the emission mechanisms of these sources.

Published
2000
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results