Spectral Energy Distributions for TeV Blazars

Abstract

In this work, we collected a sample of 69 TeV blazars from TeVCat, obtained their multi-wavelength observations, and fitted their spectral energy distributions by using the second degree polynomial function. The structure parameters of the synchrotron bumps for 68 blazars and those of the inverse-Compton bumps for 56 blzars are obtained. Then, we adopted statistical analysis to the parameters (curvature, peak frequency, peak luminosity, bolometric luminosity, and X/$\gamma$-ray spectral indexes). From our analysis and discussions, we can get following conclusions: 1. There is a clear positive correlation between the synchrotron peak frequency, $\log {\nu }_p^s$, and the inverse-Compton peak frequency $\log {\nu }_p^{IC}$, and that between the synchrotron peak luminosity, $\log {\nu }_p^s{L}_p^s$, and the inverse-Compton peak luminosity, $\log {\nu }_p^{IC}{L}_p^{IC}$. 2. The correlation between the peak frequency and the curvature of synchrotron bump is clearly different from that of the inverse-Compton bump, which further indicates that there are different emission mechanisms between them. 3. There is a correlation between $\log {\nu }_p^{IC}$ and $\gamma$-ray spectral index, ${\alpha }_{\gamma }$, for the TeV blazars: $\log {\nu }_p^{IC}=-(4.59\pm 0.30){\alpha }_{\gamma }+(32.67\pm 0.59)$, which is consistent with previous work of Abdo et al.(2010). 4. An "L-shape" relation is found between $\log {\nu }_p^s$ and ${\alpha }_X$ for both TeV blazars and Fermi blazars. A significant correlation between $\log {\nu }_p^s$ and X-ray photon index (${\alpha }_X$) is found for the TeV blazars with high synchrotron peak frequency: $\log {\nu }_p^s=-(3.20\pm 0.34){\alpha }_X+(24.33\pm 0.79)$, while the correlation is positive for low synchrotron peaked TeV sources. 5. In the ${\alpha }_X-{\alpha }_{\gamma }$ diagram, there is also an "L-shape", the anti-correlation is consistent with the available results in the literature, (...)

References in corpus (60)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• A Unifying View of the Spectral Energy Distributions of Blazars
• The Spectral Energy Distribution of Fermi bright blazars
• The Connection between X-ray- and Radio-Selected BL Lacertae Objects
• BL Lac Objects in the Synchrotron Proton Blazar Model
• The Third Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• Fast TeV variability in blazars: jets in a jet
• Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?
• Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies
• The First Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
• Log-parabolic spectra and particle acceleration in the BL Lac object Mkn 421: spectral analysis of the complete BeppoSAX wide band X-ray data set
• Atmospheric and Astrophysical Neutrinos above 1 TeV Interacting in IceCube
• Swift observations of the very intense flaring activity of Mrk 421 during 2006: I. Phenomenological picture of electron acceleration and predictions for the MeV/GeV emission
• Spectral energy distributions of a large sample of BL Lacertae objects
• Simultaneous Planck, Swift, and Fermi observations of X-ray and gamma-ray selected blazars
• Log-parabolic spectra and particle acceleration in blazars. III: SSC emission in the TeV band from Mkn 501
• The extragalactic background light, the Hubble constant, and anomalies: conclusions from 20 years of TeV gamma-ray observations
• From the Blazar Sequence to the Blazar Envelope: Revisiting the Relativistic Jet Dichotomy in Radio-loud AGN
• The Spectral Energy Distributions of Fermi Blazars
• Simultaneous observations of PKS 2155-304 with H.E.S.S., Fermi, RXTE and ATOM: spectral energy distributions and variability in a low state
• 1SXPS: A deep Swift X-ray Telescope point source catalog with light curves and spectra
• ASCA Observations of Blazars and Multiband Analysis
• Constraints on axionlike particles with H.E.S.S. from the irregularity of the PKS 2155-304 energy spectrum
• Radiation Mechanisms and Physical Properties of GeV-TeV BL Lac Objects
• The Jets of TeV Blazars at Higher Resolution: 43 GHz and Polarimetric VLBA Observations from 2005-2009
• VHE gamma-ray emission of PKS 2155-304: spectral and temporal variability
• Log-parabolic spectra and particle acceleration in blazars - II: The BeppoSAX wide band X-ray spectra of Mkn 501
• On the soft X-ray spectra of gamma-loud blazars
• Signatures of synchrotron emission and of electron acceleration in the X-ray spectra of Mrk 421
• Simultaneous X-Ray and TeV Gamma-Ray Observations of the TeV Blazar Markarian 421 during February and May 2000
• Rapid TeV Gamma-Ray Flaring of BL Lacertae
• VERITAS Discovery of >200GeV Gamma-ray Emission from the Intermediate-frequency-peaked BL Lac Object W Comae
• 2WHSP: A catalog of HE and VHE gamma-ray blazars and blazar candidates
• External Compton Radiation from Rapid Nonthermal Flares in Blazars
• Constraints on minimum electron Lorentz factor and matter content of jets for a sample of bright Fermi blazars
• Long-term monitoring of the TeV emission from Mrk 421 with the ARGO-YBJ experiment
• Multi-TeV Gamma-Ray Flares from Markarian 421 in 2000 and 2001 Observed with the Tibet Air Shower Array
• The 2012 flare of PG 1553+113 seen with H.E.S.S. and Fermi-LAT
• Day-Scale Variability of 3C 279 and Searches for Correlations in Gamma-Ray, X-Ray, and Optical Bands
• Reanalysis of the high energy cutoff of the 1997 Mkn 501 TeV energy spectrum
• Long-term Monitoring on Mrk 501 for Its VHE gamma Emission and a Flare in October 2011
• BL Lac candidates for TeV observations
• How robust are the constraints on cosmology and galaxy evolution from the lens-redshift test?
• A combined radio and GeV gamma-ray view of the 2012 and 2013 flares of Mrk 421
• Deep Broadband Observations of the Distant Gamma-ray Blazar PKS 1424+240
• Spectrum of Very High Energy Gamma-Rays from the blazar 1ES1959+650 during Flaring Activity in 2002
• TeV Gamma-ray Astronomy: A Summary
• Multiwavelength Observations of the VHE Blazar 1ES 2344+514
• Discovery of a new TeV gamma-ray source: VER J0521+211
• Multiwavelength Observations of the Previously Unidentified Blazar RX J0648.7+1516
• H.E.S.S and Fermi-LAT discovery of gamma rays from the blazar 1ES 1312-423
• The debeamed luminosity, sychrotron peak frequency and black hole mass of BL Lac objects
• A Very High Energy Gamma-Ray Spectrum of 1ES 2344+514
• VERITAS Observations of the BL Lac Object PG 1553+113
• A Uniform Correlation between Synchrotron Luminosity and Doppler Factor in Gamma-ray Bursts and Blazars: hint of similar intrinsic luminosities?
• Multi-TeV flaring from blazars: Markarian 421 a case study
• The Study of TeV Variability and Duty Cycle of Mrk 421 from 3 Years of Observations with the Milagro Observatory
• Curvature of the spectral energy distribution, the dominant process for inverse Compton component and other jet properties in Fermi 2LAC blazars
• The Intrinsic $\gamma$-ray Emissions of $Fermi$ Blazars
• Validation of a new background discrimination method for the TACTIC TeV $\gamma$-ray telescope with Markarian 421 data

Cited by in corpus (4)

• Evaluating the optical classification of Fermi BCUs using machine learning
• The relationship between the radio core-dominance parameter and spectral index in different classes of extragalactic radio sources (II)
• The Intrinsic Properties of Multiwavelength Energy Spectra for Fermi Teraelectronvolt Blazars
• Multi-wavelength study of OT 081: broadband modelling of a transitional blazar