Detection of TeV Gamma Rays from the BL Lac Object 1ES1959+650 with the Whipple 10m Telescope

Abstract

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 10m telescope on Mt. Hopkins, Arizona, using the atmospheric Cherenkov imaging technique. The flux between May and July 2002 was highly variable, with a mean of 0.64 +/- 0.03 times the steady flux from the Crab Nebula and reaching a maximum of five Crab, with variability on timescales as short as seven hours.

arXiv comment11 pages, 3 figures. Accepted for publication in ApJ Letters

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Cited by in corpus (50)

• Multiwavelength Observations of Strong Flares From the TeV-Blazar 1ES 1959+650
• The Parsec-Scale Structure and Jet Motions of the TeV Blazars 1ES 1959+650, PKS 2155-304, and 1ES 2344+514
• The Astrophysical Multimessenger Observatory Network (AMON)
• Discovery of Very High Energy $\gamma$-Rays from Markarian~180 Triggered by an Optical Outburst
• Simultaneous multiwavelength observations of the blazar 1ES1959+650 at a low TeV flux
• A Sample of Low Redshift BL Lacs. I. The Radio Data
• Coordinated Multiwavelength Observations of BL Lacertae in 2000
• Observation of VHE gamma-ray emission from the Active Galactic Nucleus 1ES1959+650 using the MAGIC telecope
• High Energy Neutrinos from the TeV Blazar 1ES 1959+650
• Observation of Markarian 421 in TeV gamma rays over a 14-year time span
• High energy neutrino flux from individual blazar flares
• Quasi-simultaneous two band optical variability of the blazars 1ES 1959+650 and 1ES 2344+514
• A hadronic synchrotron mirror model for the "orphan" TeV flare in 1ES 1959+650
• Constraints on the Very High Energy Emission from BL Lacertae Objects
• Hard X-ray properties of NuSTAR blazars
• Multiwavelength Observations of 3C 66A during the WEBT campaign of 2003 - 2004
• TeV blazar gamma-ray emission produced by a cooling pile-up particle energy distribution function
• Neutrino emission in the hadronic Synchrotron Mirror Model: the "orphan" TeV flare from 1ES 1959+650
• Investigating Broadband Variability of the TeV Blazar 1ES 1959+650
• Spectrum of Very High Energy Gamma-Rays from the blazar 1ES1959+650 during Flaring Activity in 2002
• Broadband characterisation of the very intense TeV flares of the blazar 1ES 1959+650 in 2016
• TeV Blazars - Observations and Models
• Neutrino Bursts from Fanaroff-Riley I Radio Galaxies
• Extragalactic Sources of TeV Gamma Rays: A Summary
• Upper Limits on the Extragalactic Background Light from the Gamma-Ray Spectra of Blazars
• A Very High Energy Gamma-Ray Spectrum of 1ES 2344+514
• X-Ray Spectral Variability of Extreme BL Lac AGN H1426+428
• Multiwavelength observations and modeling of 1ES 1959+650 in a low flux state
• Hadronic-Origin orphan TeV flare from the 1ES 1959+650
• Detection of X-ray Polarization from the Blazar 1ES 1959+650 with the Imaging X-ray Polarimetry Explorer
• Long-term optical polarization variability of the tev blazar 1es~1959+650
• Search for High Energy Gamma Rays from an X-ray Selected Blazar Sample
• Broadband study of blazar 1ES 1959+650 during flaring state in 2016
• Wide band X-ray and optical observations of the BL Lac object 1ES 1959+650 in high state
• Multi-color optical monitoring of ten blazars from 2005 to 2011
• Multiwavelength Observations of 1ES 1959+650, One Year After the Strong Outburst of 2002
• Gamma Ray Astronomy With IceCube
• Could a plasma in quasi-thermal equilibrium be associated to the "orphan" TeV flares ?
• Latest Results from VERITAS: Gamma 2016
• A two-zone photohadronic interpretation of the EHBL-like behavior of the 2016 multi-TeV flares of 1ES 1959+650
• Neutrinos and cosmic rays
• AstroSat observation of the HBL 1ES 1959+650 during its October 2017 flaring
• X-ray Studies of Blazar 1ES 1959+650 Using SWIFT & XMM-NEWTON Satellite
• IceCube Science
• Observations of Extragalactic Sources with the MAGIC Telescope
• VHE $\gamma$-ray observations of bright BL Lacs with the Large-Sized Telescope prototype (LST-1) of the CTAO
• Insights into the Long-term behavior of the optical polarization from the blazar 1ES 1959+650
• SVOM discovery of a strong X-ray outburst of the blazar 1ES~1959+650 and multi-wavelength follow-up with the Neil Gehrels Swift observatory
• Properties and Possible Physical Origins of $\gamma$-ray Emission in Extreme Synchrotron Blazars
• Multiwavelength spectral and temporal analysis of VHE Blazar 1ES 1959+650: Tracing emission mechanisms across flux states