Constraints on the Very High Energy Emission from BL Lacertae Objects

Abstract

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 at low redshift (z < 0.2) but observations of objects of z up to 0.444 are also reported. Five of the objects are EGRET sources and two are unconfirmed TeV sources. Three of the confirmed sources of extragalactic TeV gamma rays were originally observed as part of this survey and have been reported elsewhere. No significant excesses are detected from any of the other objects observed, on time scales of days, months or years. We report 99.9% confidence level flux upper limits for the objects for each observing season. The flux upper limits are typically 20% of the Crab flux although, for some sources, limits as sensitive as 6% of the Crab flux were derived. The results are consistent with the synchrotron-self-Compton (SSC) model predictions considered in this work.

30 pages, 9 Tables, 3 Figures, accepted for publication in the Astrophysical Journal, 1 March 2003 edition Version 2 contains four corrections to the flux units (Tables 5, 6, 7 and 9) and two corrections to upper limits in the flux units column for H1426+428 in Table 6

References in corpus (7)

• BL Lac Objects in the Synchrotron Proton Blazar Model
• Detection of TeV Gamma Rays from the BL Lac Object 1ES1959+650 with the Whipple 10m Telescope
• Detection of the BL Lac Object H1426+428 at TeV Gamma Ray Energies
• Predictions of the High-Energy Emission from BL Lac objects: The Case of W Comae
• Search for High Energy Gamma Rays from an X-ray Selected Blazar Sample
• EXIST: Mission Design Concept and Technology Program
• The imaging X-ray detector for Lobster-ISS

Cited by in corpus (34)

• New constraints on the Mid-IR EBL from the HESS discovery of VHE gamma rays from 1ES 0229+200
• Hints of the existence of Axion-Like-Particles from the gamma-ray spectra of cosmological sources
• Fermi observations of TeV-selected AGN
• Discovery of very high energy gamma-ray emission from the low-frequency peaked BL Lacertae object BL Lacertae
• Discovery of VHE gamma-ray emission from 1ES1218+30.4
• Discovery of Very High Energy $\gamma$-Rays from Markarian~180 Triggered by an Optical Outburst
• VERITAS Discovery of >200GeV Gamma-ray Emission from the Intermediate-frequency-peaked BL Lac Object W Comae
• VERITAS Observations of a Very High Energy Gamma-ray Flare from the Blazar 3C 66A
• The Discovery of gamma-Ray Emission From The Blazar RGB J0710+591
• Observation of VHE gamma-ray emission from the Active Galactic Nucleus 1ES1959+650 using the MAGIC telecope
• Observations of Selected AGN with H.E.S.S
• Discovery of VHE gamma-rays from the blazar 1ES 1215+303 with the MAGIC Telescopes and simultaneous multi-wavelength observations
• Flux upper limits for 47 AGN observed with H.E.S.S. in 2004-2011
• Synoptic studies of seventeen blazars detected in very high-energy gamma-rays
• Discovery of Very High-Energy Gamma-Ray Radiation from the BL Lac 1ES 0806+524
• Discovery of a very high energy gamma-ray signal from the 3C 66A/B region
• Multiwavelength Observations of 3C 66A during the WEBT campaign of 2003 - 2004
• Observations of the BL Lac Object 3C 66A with STACEE
• Optical spectroscopy of BL Lacertae objects. Broad lines, companion galaxies and redshift lower limits
• 1ES 0229+200: An extreme blazar with a very high minimum Lorentz factor
• Upper limits from five years of blazar observations with the VERITAS Cherenkov telescopes
• A Search for TeV Gamma-Ray Emission from High-Peaked Flat Spectrum Radio Quasars Using the Whipple Air-Cherenkov Telescope
• VERITAS detection of $\gamma$-ray flaring activity from the BL Lac object 1ES 1727+502 during bright moonlight observations
• MAGIC detection of short-term variability of the high-peaked BL Lac object 1ES 0806+524
• Observations of the Blazar 3C 66A with the MAGIC Telescopes in Stereoscopic Mode
• Discovery of very high energy gamma-ray emission from the blazar 1ES 1727+502 with the MAGIC Telescopes
• Discovery of very high energy gamma-ray emission from the blazar 1ES 0033+595 by the MAGIC telescopes
• Morpho-Kinematic Properties of the 21-Micron Source IRAS 07134+1005
• Long term multi-wavelength view of the blazar 1ES 1218+304
• Observations of Extragalactic Sources with the MAGIC Telescope
• Six-year Optical Monitoring of BL Lacertae Object 1ES 0806+52.4
• A Synchrotron Self-Compton Scenario for the Very High Energy Gamma-ray Emission of the Intermediate BL Lacertae object W Comae
• Very high energy observations of the BL Lac objects 3C 66A and OJ 287
• Studying flux variability of the BL Lac object 1ES0806+524 with MAGIC in a multi-wavelength context