Search for TeV $\gamma$--ray emission from blazar 1ES1218+304 with TACTIC telescope during March-April 2013

Abstract

In this paper, we present results of TeV $\gamma$--ray observations of the high synchrotron peaked BL Lac object 1ES 1218+304 (z=0.182) with the $TACTIC$ (TeV Atmospheric Cherenkov Telescope with Imaging Camera). The observations are primarily motivated by the unusually hard GeV-TeV spectrum of the source despite its relatively large redshift. The source is observed in the TeV energy range with the $TACTIC$ from March 1, 2013 to April 15, 2013 (MJD 56352--56397) for a total observation time of 39.62 h and no evidence of TeV $\gamma$--ray activity is found from the source. The corresponding 99$\%$ confidence level upper limit on the integral flux above a threshold energy of 1.1 TeV is estimated to be 3.41 $\times 10^{-12}$ photons cm${}^{-2}$ s${}^{-1}$ (i.e $<23\%$ Crab Nebula flux) assuming a power law differential energy spectrum with photon index 3.0, as previously observed by the $MAGIC$ and $VERITAS$ telescopes. For the study of multi-wavelength emission from the source, we use nearly simultaneous optical, UV and and X--ray data collected by the UVOT and XRT instruments on board the \emph{Swift} satellite and high energy $\gamma$--ray data collected by the Large Area Telescope on board the \emph{Fermi} satellite. We also use radio data at 15 GHz from OVRO 40 m telescope in the same period. No significant increase of activity is detected from radio to TeV $\gamma$--rays from 1ES1218+304 during the period from March 1, 2013 to April 15, 2013.

arXiv commentAccepted for Publication in New Astronomy

References in corpus (31)

• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Unified Schemes for Radio-Loud Active Galactic Nuclei
• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• The Swift X-ray Telescope
• The Swift Ultra-Violet/Optical Telescope
• Fermi Large Area Telescope Second Source Catalog
• The Spectral Energy Distribution of Fermi bright blazars
• Photometric Calibration of the Swift Ultraviolet/Optical Telescope
• The extragalactic optical-infrared background radiations, their time evolution and the cosmic photon-photon opacity
• BL Lac Objects in the Synchrotron Proton Blazar Model
• Blazars in the Fermi Era: The OVRO 40-m Telescope Monitoring Program
• A low level of extragalactic background light as revealed by gamma-rays from blazars
• TeV Gamma Rays from BL Lac Objects due to Synchrotron Radiation of Extremely High Energy Protons
• A Proton Synchrotron Blazar Model for Flaring in Markarian~501
• Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey
• Comptonization of Infrared Radiation from Hot Dust by Relativistic Jets in Quasars
• Deep Galaxy Counts, Extragalactic Background Light, and the Stellar Baryon Budget
• Number Counts At 3 < lambda < 10 um From the Spitzer Space Telescope
• TeV candidate BL Lac objects
• Fermi observations of TeV-selected AGN
• Discovery of VHE gamma-ray emission from 1ES1218+30.4
• The Energy Spectrum of TeV Gamma-Rays from the Crab Nebula as measured by the HEGRA system of imaging air Cherenkov telescopes
• Discovery of Variability in the Very High Energy Gamma-Ray Emission of 1ES 1218+304 with VERITAS
• The TACTIC atmospheric Cherenkov Imaging telescope
• Probing the 3.6 Micron CIRB with Spitzer in 3 DIRBE Dark Spots
• Upper Limits from HESS AGN Observations in 2005-2007
• Constraints to Energy Spectra of Blazars based on Recent EBL Limits from Galaxy Counts
• Modelling the variability of 1ES1218+30.4
• Intrinsic absorbers in BL Lac objects: the XMM-Newton view
• Spectral modelling of 1 ES 1218+30.4
• Very high-energy observations of the two high-frequency peaked BL Lac objects 1ES 1218+304 and H 1426+428

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• X-Ray Spectral Variability of Thirteen TeV High Energy Peaked Blazars with XMM-Newton
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