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Very High Energy outburst of Markarian 501 in May 2009
E. Aliu, S. Archambault, A. Archer +108
The very high energy (VHE; E 100 GeV) blazar Markarian 501 was observed between April 17 and May 5 (MJD 54938--54956), 2009, as part of an extensive multi-wavelength campaign f…
VERITAS detection of -ray flaring activity from the BL Lac object 1ES 1727+502 during bright moonlight observations
S. Archambault, A. Archer, M. Beilicke +80
During moonlit nights, observations with ground-based Cherenkov telescopes at very high energies (VHE, GeV) are constrained since the photomultiplier tubes (PMTs) in the te…
Investigating Broadband Variability of the TeV Blazar 1ES 1959+650
E. Aliu, S. Archambault, T. Arlen +92
We summarize broadband observations of the TeV-emitting blazar 1ES 1959+650, including optical R-band observations by the robotic telescopes Super-LOTIS and iTelescope, UV observat…
Multiwavelength observations of Mrk 501 in 2008
MAGIC Collaboration, J. Aleksić, S. Ansoldi +256
Mrk 501 is one of the brightest blazars at TeV energies and has been extensively studied since its first VHE detection in 1996. Our goal is to characterize in detail the source gam…
Spatially Resolving the Very High Energy emission from MGRO J2019+37 with VERITAS
VERITAS Collaboration
We present very high energy (VHE) imaging of MGRO J2019+37 obtained with the VERITAS observatory. The bright extended () unidentified Milagro source is located towar…
Inferred cosmic-ray spectrum from -LAT -ray observations of the Earth's limb
LAT Collaboration, M. Ackermann, M. Ajello +150
Recent accurate measurements of cosmic-ray (CR) species by ATIC-2, CREAM, and PAMELA reveal an unexpected hardening in the proton and He spectra above a few hundred GeV, a gradual…
A Three-Year Multi-Wavelength Study of the Very High Energy Gamma-ray Blazar 1ES 0229+200
E. Aliu, S. Archambault, T. Arlen +83
The high-frequency-peaked BL Lacertae object 1ES 0229+200 is a relatively distant (z = 0.1396), hard-spectrum (Gamma ~ 2.5), very-high-energy-emitting (E > 100 GeV) gamma-ray blaza…
Long-term TeV and X-ray Observations of the Gamma-ray Binary HESS J0632+057
VERITAS Collaboration, E. Aliu, S. Archambault +297
HESS J0632+057 is the only gamma-ray binary known so far whose position in the sky allows observations with ground-based observatories both in the northern and southern hemispheres…
MAGIC upper limits on the GRB 090102 afterglow
MAGIC Collaboration, J. Aleksić, S. Ansoldi +160
Indications of a GeV component in the emission from GRBs are known since the EGRET observations during the 1990's and they have been confirmed by the data of the Fermi satellite. T…
VERITAS Observations of the Microquasar Cygnus X-3
S. Archambault, M. Beilicke, W. Benbow +76
We report results from TeV gamma-ray observations of the microquasar Cygnus X-3. The observations were made with the Very Energetic Radiation Imaging Telescope Array System (VERITA…
Observation of Markarian 421 in TeV gamma rays over a 14-year time span
V. A. Acciari, T. Arlen, T. Aune +73
The variability of the blazar Markarian 421 in TeV gamma rays over a 14-year time period has been explored with the Whipple 10 m telescope. It is shown that the dynamic range of it…
Multiwavelength Observations of The TeV Binary LS I +61 303 with VERITAS, Fermi-LAT and Swift-XRT During a TeV Outburst
E. Aliu, S. Archambault, B. Behera +71
We present the results of a multiwavelength observational campaign on the TeV binary system LS I +61 303 with the VERITAS telescope array (>200 GeV), Fermi-LAT (0.3-300 GeV), and S…
Long term observations of B2 1215+30 with VERITAS
VERITAS collaboration, E. Aliu, S. Archambault +82
We report on VERITAS observations of the BL Lac object B2 1215+30 between 2008 and 2012. During this period, the source was detected at very high energies (VHE; E > 100 GeV) by VER…
Dark Matter Constraints from Observations of 25 Milky Way Satellite Galaxies with the Fermi Large Area Telescope
LAT Collaboration, M. Ackermann, A. Albert +119
The dwarf spheroidal satellite galaxies of the Milky Way are some of the most dark-matter-dominated objects known. Due to their proximity, high dark matter content, and lack of ast…
A search for enhanced very high energy gamma-ray emission from the March 2013 Crab Nebula flare
The VERITAS Collaboration, E. Aliu, S. Archambault +76
In March 2013, a flaring episode from the Crab Nebula lasting ~2 weeks was detected by the Fermi-LAT (Large Area Telescope on board the Fermi Gamma-ray Space Telescope). VERITAS pr…
VERITAS contributions to the 33rd International Cosmic Ray Conference
VERITAS Collaboration, E. Aliu, S. Archambault +86
Compilation of papers contributed by the VERITAS Collaboration to the 33rd International Cosmic Ray Conference, held 2-9 July, 2013, in Rio de Janeiro, Brazil.
Discovery of a new TeV gamma-ray source: VER J0521+211
VERITAS Collaboration, S. Archambault, T. Arlen +83
We report the detection of a new TeV gamma-ray source, VER J0521+211, based on observations made with the VERITAS imaging atmospheric Cherenkov telescope array. These observations…
CTA contributions to the 33rd International Cosmic Ray Conference (ICRC2013)
The CTA Consortium, :, O. Abril +1102
Compilation of CTA contributions to the proceedings of the 33rd International Cosmic Ray Conference (ICRC2013), which took place in 2-9 July, 2013, in Rio de Janeiro, Brazil
Multiwavelength observations and modeling of 1ES 1959+650 in a low flux state
VERITAS Collaboration, E. Aliu, S. Archambault +82
We report on the VERITAS observations of the high-frequency peaked BL Lac object 1ES 1959+650 in the period 2007-2011. This source is detected at TeV energies by VERITAS at 16.4 st…
Discovery of TeV Gamma-ray Emission Toward Supernova Remnant SNR G78.2+2.1
E. Aliu, S. Archambault, T. Arlen +97
We report the discovery of an unidentified, extended source of very-high-energy (VHE) gamma-ray emission, VER J2019+407, within the radio shell of the supernova remnant SNR G78.2+2…
The Fermi All-sky Variability Analysis: A list of flaring gamma-ray sources and the search for transients in our Galaxy
LAT Collaboration
In this paper we present the Fermi All-sky Variability Analysis (FAVA), a tool to systematically study the variability of the gamma-ray sky measured by the Large Area Telescope (LA…
High-Energy Gamma-Ray Emission From Solar Flares: Summary of Fermi LAT Detections and Analysis of Two M-Class Flares
LAT collaboration
We present the detections of 19 solar flares detected in high-energy gamma rays (above 100 MeV) with the Fermi Large Area Telescope (LAT) during its first four years of operation.…
The First Fermi LAT Gamma-Ray Burst Catalog
LAT Collaboration
In three years of observations since the beginning of nominal science operations in August 2008, the Large Area Telescope (LAT) on board the Fermi Gamma Ray Space Telescope has obs…
Gamma-Ray Burst Science in the Era of the Cherenkov Telescope Array
Susumu Inoue, Jonathan Granot, Paul T. O'Brien +23
We outline the science prospects for gamma-ray bursts (GRBs) with the Cherenkov Telescope Array (CTA), the next-generation ground-based gamma-ray observatory operating at energies…