509 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Purdue University West LafayetteUS138 papers
- University of UtahUS136 papers
- Iowa State UniversityUS135 papers
- University of California, Los AngelesUS135 papers
- Center for Astrophysics Harvard & SmithsonianUS133 papers
- Ollscoil na Gaillimhe – University of GalwayIE133 papers
- Washington University in St. LouisUS133 papers
- McGill UniversityCA129 papers
- Munster Technological UniversityIE129 papers
- University of California, Santa CruzUS124 papers
- University College DublinIE123 papers
- Columbia UniversityUS122 papers
24 papers · 1 filter
The June 2008 flare of Markarian 421 from optical to TeV energies
The Agile Collaboration, Webt Collaboration, Magic Collaboration +2
We present optical, X-ray, high energy ( GeV) and very high energy ( GeV; VHE) observations of the high-frequency peaked blazar Mrk 421 taken betwee…
Discovery of Very High-Energy Gamma-Ray Radiation from the BL Lac 1ES 0806+524
VERITAS Collaboration, V. Acciari, E. Aliu +90
The high-frequency-peaked BL-Lacertae object \objectname{1ES 0806+524}, at redshift z=0.138, was observed in the very-high-energy (VHE) gamma-ray regime by VERITAS between November…
VERITAS Discovery of >200GeV Gamma-ray Emission from the Intermediate-frequency-peaked BL Lac Object W Comae
VERITAS Collaboration, V. A. Acciari, E. Aliu +80
We report the detection of very high-energy gamma-ray emission from the intermediate-frequency-peaked BL Lacertae object W Comae (z=0.102) by VERITAS. The source was observed betwe…
Observation of gamma-ray emission from the galaxy M87 above 250 GeV with VERITAS
V. A. Acciari, M. Beilicke, G. Blaylock +74
The multiwavelength observation of the nearby radio galaxy M87 provides a unique opportunity to study in detail processes occurring in Active Galactic Nuclei from radio waves to Te…
Very High Energy Observations of Gamma-Ray Burst Locations with the Whipple Telescope
D. Horan, R. W. Atkins, H. M. Badran +56
Gamma-ray burst (GRB) observations at very high energies (VHE, E > 100 GeV) can impose tight constraints on some GRB emission models. Many GRB afterglow models predict a VHE compon…
Observations of the Unidentified TeV Gamma-Ray Source TeV J2032+4130 with the Whipple Observatory 10 m Telescope
A. Konopelko, R. W. Atkins, G. Blaylock +58
We report on observations of the sky region around the unidentified TeV gamma-ray source TeV J2032+4130 carried out with the Whipple Observatory 10 m atmospheric Cherenkov telescop…
Whipple Telescope Observations of LS I +61 303: 2004-2006
Andy Smith
In this paper we present the results of the past two years' observations on the galactic microquasar LS I +61 303 with the Whipple 10m gamma-ray telescope. The recent MAGIC detecti…
TeV Gamma-Ray Observations of the Perseus and Abell 2029 Galaxy Clusters
J. S. Perkins, H. M. Badran, G. Blaylock +41
Galaxy clusters might be sources of TeV gamma rays emitted by high-energy protons and electrons accelerated by large scale structure formation shocks, galactic winds, or active gal…
Multiwavelength Observations of the Blazar Mrk 421 in December 2002 and January 2003
P. Rebillot, M. Aller, H. Aller +5
We report on a multiwavelength campaign on the TeV gamma-ray blazar Markarian (Mrk) 421 performed during December 2002 and January 2003. These target of opportunity observations we…
A Very High Energy Gamma-Ray Spectrum of 1ES 2344+514
M. Schroedter, H. M. Badran, J. H. Buckley +26
The BL Lacertae (BL Lac) object 1ES 2344+514 (1ES 2344), at a redshift of 0.044, was discovered as a source of very high energy (VHE) gamma rays by the Whipple Collaboration in 199…
A Multi-wavelength View of the TeV Blazar Markarian 421: Correlated Variability, Flaring, and Spectral Evolution
M. Blazejowski
We report results from a multi-wavelength monitoring campaign on Mrk 421 over the period of 2003-2004. The source was observed simultaneously at TeV and X-ray energies, with suppor…
Spectrum of Very High Energy Gamma-Rays from the blazar 1ES1959+650 during Flaring Activity in 2002
M. K. Daniel
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 o…
A Search for TeV Gamma-Ray Emission from High-Peaked Flat Spectrum Radio Quasars Using the Whipple Air-Cherenkov Telescope
A. D. Falcone, the VERITAS collaboration
Blazars have traditionally been separated into two broad categories based upon their optical emission characteristics; BL Lacs, with faint or no emission lines, and flat spectrum r…
Constraints on the Very High Energy Emission from BL Lacertae Objects
D. Horan
We present results from observations of 29 BL Lacertae objects, taken with the Whipple Observatory 10 m Gamma-Ray Telescope between 1995 and 2000. The observed objects are mostly a…
Search for High Energy Gamma Rays from an X-ray Selected Blazar Sample
I. de la Calle Perez, the VERITAS Collaboration
Our understanding of blazars has been greatly increased in recent years by extensive multi-wavelength observations, particularly in the radio, X-ray and gamma-ray regions. Over the…
Detection of TeV Gamma Rays from the BL Lac Object 1ES1959+650 with the Whipple 10m Telescope
J. Holder, VERITAS collaboration
We present the first strong detection of very high energy gamma-rays from the close (z=0.048) X-ray selected BL Lacertae object 1ES1959+650. Observations were made with the Whipple…
The TeV spectrum of H1426+428
D. Petry, I. H. Bond, S. M. Bradbury +45
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 dat…
Discovery of Spectral Variability of Markarian 421 at TeV Energies
F. Krennrich, I. H. Bond, S. M. Bradbury +38
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 2000/2…
RR Lyrae Stars and Anomalous Cepheids in the Draco Dwarf Spheroidal Galaxy
K. Kinemuchi, H. A. Smith, A. LaCluyze +4
We present new results on RR Lyrae stars and anomalous Cepheids in the Draco dwarf spheroidal galaxy. We have increased the number of double-mode RR Lyrae stars and found three new…
Detection of the BL Lac Object H1426+428 at TeV Gamma Ray Energies
D. Horan
A very high energy (VHE) gamma-ray signal has been detected at the 5.4 sigma level from H1426+428, an x-ray selected BL Lacertae object at a redshift of 0.129. The object was monit…
VERITAS: the Very Energetic Radiation Imaging Telescope Array System
T. C. Weekes
The Very Energetic Radiation Imaging Telescope Array System (VERITAS) represents an important step forward in the study of extreme astrophysical processes in the universe. It combi…
Cutoff in the TeV Energy Spectrum of Markarian 421 During Strong Flares in 2001
F. Krennrich, H. M. Badran, I. H. Bond +43
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 o…
VERITAS: Performance characteristics (baseline design)
V. V. Vassiliev, D. A. Carter-Lewis, A. M. Hillas +6
VERITAS is a proposed major ground-based gamma-ray observatory to be built at the Whipple Observatory in southern Arizona, USA. It will consist of an array of seven 10m imaging Che…
VERITAS: Very LArge Energetic Radiation Imaging Telescope Array System
T. C. Weekes, C. Akerlof, S. Biller +37
A next generation atmospheric Cherenkov observatory is described based on the Whipple Observatory -ray telescope. A total of nine such imaging telescopes will be deployed in an…