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Title: CONSTRAINTS ON THE INTERGALACTIC MAGNETIC FIELD WITH GAMMA-RAY OBSERVATIONS OF BLAZARS

Abstract

Distant BL Lacertae objects emit γ rays which interact with the extragalactic background light (EBL), creating electron-positron pairs, and reducing the flux measured by ground-based imaging atmospheric Cherenkov telescopes (IACTs) at very-high energies (VHE). These pairs can Comptonscatter the cosmic microwave background, creating a γ-ray signature at slightly lower energies observable by the Fermi Large Area Telescope (LAT). This signal is strongly dependent on the intergalactic magnetic field (IGMF) strength (B) and its coherence length (LB). We use IACT spectra taken from the literature for 5 VHE-detected BL Lac objects, and combine it with LAT spectra for these sources to constrain these IGMF parameters. Low B values can be ruled out by the constraint that the cascade flux cannot exceed that observed by the LAT. High values of B can be ruled out from the constraint that the EBL-deabsorbed IACT spectrum cannot be greater than the LAT spectrum extrapolated into the VHE band, unless the cascade spectrum contributes a sizable fraction of the LAT flux. We rule out low B values (B . 10-19 G for LB ≥ 1 Mpc) at > 5σ in all trials with different EBL models and data selection, except when

Authors:
 [1];  [2];  [3];  [2]; ORCiD logo [4];  [5];  [3]
  1. Naval Research Lab. (NRL), Washington, DC (United States)
  2. California Polytechnic State Univ. (CalPoly), San Luis Obispo, CA (United States)
  3. Univ. of Maryland Baltimore County (UMBC), Baltimore, MD (United States)
  4. Clemson Univ., SC (United States)
  5. Ecole Polytechnique, Palaiseau (France)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1354847
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 814; Journal Issue: 1; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Finke, Justin D., Reyes, Luis C., Georganopoulos, Markos, Reynolds, Kaeleigh, Ajello, Marco, Fegan, Stephen J., and McCann, Kevin. CONSTRAINTS ON THE INTERGALACTIC MAGNETIC FIELD WITH GAMMA-RAY OBSERVATIONS OF BLAZARS. United States: N. p., 2015. Web. doi:10.1088/0004-637X/814/1/20.
Finke, Justin D., Reyes, Luis C., Georganopoulos, Markos, Reynolds, Kaeleigh, Ajello, Marco, Fegan, Stephen J., & McCann, Kevin. CONSTRAINTS ON THE INTERGALACTIC MAGNETIC FIELD WITH GAMMA-RAY OBSERVATIONS OF BLAZARS. United States. doi:https://doi.org/10.1088/0004-637X/814/1/20
Finke, Justin D., Reyes, Luis C., Georganopoulos, Markos, Reynolds, Kaeleigh, Ajello, Marco, Fegan, Stephen J., and McCann, Kevin. Thu . "CONSTRAINTS ON THE INTERGALACTIC MAGNETIC FIELD WITH GAMMA-RAY OBSERVATIONS OF BLAZARS". United States. doi:https://doi.org/10.1088/0004-637X/814/1/20. https://www.osti.gov/servlets/purl/1354847.
@article{osti_1354847,
title = {CONSTRAINTS ON THE INTERGALACTIC MAGNETIC FIELD WITH GAMMA-RAY OBSERVATIONS OF BLAZARS},
author = {Finke, Justin D. and Reyes, Luis C. and Georganopoulos, Markos and Reynolds, Kaeleigh and Ajello, Marco and Fegan, Stephen J. and McCann, Kevin},
abstractNote = {Distant BL Lacertae objects emit γ rays which interact with the extragalactic background light (EBL), creating electron-positron pairs, and reducing the flux measured by ground-based imaging atmospheric Cherenkov telescopes (IACTs) at very-high energies (VHE). These pairs can Comptonscatter the cosmic microwave background, creating a γ-ray signature at slightly lower energies observable by the Fermi Large Area Telescope (LAT). This signal is strongly dependent on the intergalactic magnetic field (IGMF) strength (B) and its coherence length (LB). We use IACT spectra taken from the literature for 5 VHE-detected BL Lac objects, and combine it with LAT spectra for these sources to constrain these IGMF parameters. Low B values can be ruled out by the constraint that the cascade flux cannot exceed that observed by the LAT. High values of B can be ruled out from the constraint that the EBL-deabsorbed IACT spectrum cannot be greater than the LAT spectrum extrapolated into the VHE band, unless the cascade spectrum contributes a sizable fraction of the LAT flux. We rule out low B values (B . 10-19 G for LB ≥ 1 Mpc) at > 5σ in all trials with different EBL models and data selection, except when},
doi = {10.1088/0004-637X/814/1/20},
journal = {The Astrophysical Journal (Online)},
number = 1,
volume = 814,
place = {United States},
year = {2015},
month = {11}
}

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Works referenced in this record:

FERMI OBSERVATIONS OF TeV-SELECTED ACTIVE GALACTIC NUCLEI
journal, December 2009


FERMI LARGE AREA TELESCOPE CONSTRAINTS ON THE GAMMA-RAY OPACITY OF THE UNIVERSE
journal, October 2010


Discovery of hard-spectrum γ -ray emission from the BL Lacertae object 1ES 0414+009
journal, February 2012


Measurement of the extragalactic background light imprint on the spectra of the brightest blazars observed with H.E.S.S.
journal, January 2013


Veritas Observations of the bl lac Object 1es 1218+304
journal, April 2009


Discovery of very high Energy Gamma rays from pks 1424+240 and Multiwavelength Constraints on its Redshift
journal, December 2009


FERMI LARGE AREA TELESCOPE THIRD SOURCE CATALOG
journal, June 2015

  • Acero, F.; Ackermann, M.; Ajello, M.
  • The Astrophysical Journal Supplement Series, Vol. 218, Issue 2
  • DOI: 10.1088/0067-0049/218/2/23

The Imprint of the Extragalactic Background Light in the Gamma-Ray Spectra of Blazars
journal, November 2012


DETERMINATION OF THE POINT-SPREAD FUNCTION FOR THE FERMI LARGE AREA TELESCOPE FROM ON-ORBIT DATA AND LIMITS ON PAIR HALOS OF ACTIVE GALACTIC NUCLEI
journal, February 2013


THE THIRD CATALOG OF ACTIVE GALACTIC NUCLEI DETECTED BY THE FERMI LARGE AREA TELESCOPE
journal, August 2015


Joint Analysis of BICEP2/ Keck Array and Planck Data
journal, March 2015


Detection of B -Mode Polarization at Degree Angular Scales by BICEP2
journal, June 2014


A low level of extragalactic background light as revealed by γ-rays from blazars
journal, April 2006

  • Aharonian, F.; Akhperjanian, A. G.; Bazer-Bachi, A. R.
  • Nature, Vol. 440, Issue 7087
  • DOI: 10.1038/nature04680

An Exceptional Very High Energy Gamma-Ray Flare of PKS 2155-304
journal, July 2007

  • Aharonian, F.; Akhperjanian, A. G.; Bazer-Bachi, A. R.
  • The Astrophysical Journal, Vol. 664, Issue 2
  • DOI: 10.1086/520635

Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with HESS and broadband characterisation
journal, May 2007

  • Aharonian, F.; Akhperjanian, A. G.; Bazer-Bachi, A. R.
  • Astronomy & Astrophysics, Vol. 470, Issue 2
  • DOI: 10.1051/0004-6361:20077057

Discovery of VHE  γ -rays from the distant BL Lacertae 1ES 0347-121
journal, August 2007

  • Aharonian, F.; Akhperjanian, A. G.; Barres de Almeida, U.
  • Astronomy & Astrophysics, Vol. 473, Issue 3
  • DOI: 10.1051/0004-6361:20078412

New constraints on the mid-IR EBL from the HESS discovery of VHE γ -rays from 1ES 0229+200
journal, October 2007

  • Aharonian, F.; Akhperjanian, A. G.; Barres de Almeida, U.
  • Astronomy & Astrophysics, Vol. 475, Issue 2
  • DOI: 10.1051/0004-6361:20078462

Very high energy gamma rays from active galactic nuclei: Cascading on the cosmic background radiation fields and the formation of pair halos
journal, March 1994

  • Aharonian, F. A.; Coppi, P. S.; Voelk, H. J.
  • The Astrophysical Journal, Vol. 423
  • DOI: 10.1086/187222

Formation of hard very high energy gamma-ray spectra of blazars due to internal photon-photon absorption
journal, July 2008

  • Aharonian, Felix A.; Khangulyan, D.; Costamante, L.
  • Monthly Notices of the Royal Astronomical Society, Vol. 387, Issue 3
  • DOI: 10.1111/j.1365-2966.2008.13315.x

On the origin of highest energy gamma-rays from Mkn 501
journal, March 2002

  • Aharonian, F. A.; Timokhin, A. N.; Plyasheshnikov, A. V.
  • Astronomy & Astrophysics, Vol. 384, Issue 3
  • DOI: 10.1051/0004-6361:20020062

Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?
journal, June 2008


A Three-Year Multi-Wavelength Study of the Very-High-Energy γ-Ray Blazar 1es 0229+200
journal, January 2014


The gamma-normal distribution: Properties and applications
journal, January 2014


Evidence for Gamma-Ray Halos Around Active Galactic Nuclei and the First Measurement of Intergalactic Magnetic Fields
journal, September 2010


INTERGALACTIC MAGNETIC FIELDS AND GAMMA-RAY OBSERVATIONS OF EXTREME TeV BLAZARS
journal, October 2014

  • Arlen, Timothy C.; Vassilev, Vladimir V.; Weisgarber, Thomas
  • The Astrophysical Journal, Vol. 796, Issue 1
  • DOI: 10.1088/0004-637X/796/1/18

THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION
journal, May 2009


The Optical Extragalactic Background Light: Revisions and Further Comments
journal, September 2007

  • Bernstein, Rebecca A.
  • The Astrophysical Journal, Vol. 666, Issue 2
  • DOI: 10.1086/519824

The First Detections of the Extragalactic Background Light at 3000, 5500, and 8000 Å. I. Results
journal, May 2002

  • Bernstein, Rebecca A.; Freedman, Wendy L.; Madore, Barry F.
  • The Astrophysical Journal, Vol. 571, Issue 1
  • DOI: 10.1086/339422

An upper limit to the infrared background from observations of TeV gamma rays
journal, May 1995

  • Biller, S. D.; Akerlof, C. W.; Buckley, J.
  • The Astrophysical Journal, Vol. 445
  • DOI: 10.1086/175689

The Hard VHE γ-Ray Emission in High-Redshift TeV Blazars: Comptonization of Cosmic Microwave Background Radiation in an Extended Jet?
journal, April 2008

  • Böttcher, Markus; Dermer, Charles D.; Finke, Justin D.
  • The Astrophysical Journal, Vol. 679, Issue 1
  • DOI: 10.1086/588780

THE COSMOLOGICAL IMPACT OF LUMINOUS TeV BLAZARS. I. IMPLICATIONS OF PLASMA INSTABILITIES FOR THE INTERGALACTIC MAGNETIC FIELD AND EXTRAGALACTIC GAMMA-RAY BACKGROUND
journal, May 2012

  • Broderick, Avery E.; Chang, Philip; Pfrommer, Christoph
  • The Astrophysical Journal, Vol. 752, Issue 1
  • DOI: 10.1088/0004-637X/752/1/22

THE COSMOLOGICAL IMPACT OF LUMINOUS TeV BLAZARS. II. REWRITING THE THERMAL HISTORY OF THE INTERGALACTIC MEDIUM
journal, May 2012

  • Chang, Philip; Broderick, Avery E.; Pfrommer, Christoph
  • The Astrophysical Journal, Vol. 752, Issue 1
  • DOI: 10.1088/0004-637X/752/1/23

The Effect of Nonlinear Landau Damping on Ultrarelativistic beam Plasma Instabilities
journal, December 2014

  • Chang, Philip; Broderick, Avery E.; Pfrommer, Christoph
  • The Astrophysical Journal, Vol. 797, Issue 2
  • DOI: 10.1088/0004-637X/797/2/110

Detecting the Attenuation of Blazar Gamma‐Ray Emission by Extragalactic Background Light with the Gamma‐Ray Large Area Space Telescope
journal, June 2004

  • Chen, Andrew; Reyes, Luis C.; Ritz, Steven
  • The Astrophysical Journal, Vol. 608, Issue 2
  • DOI: 10.1086/383456

Intergalactic magnetic field spectra from diffuse gamma-rays
journal, May 2015

  • Chen, W.; Chowdhury, B. D.; Ferrer, F.
  • Monthly Notices of the Royal Astronomical Society, Vol. 450, Issue 4
  • DOI: 10.1093/mnras/stv308

Gamma-Rays from Blazars and the Extragalactic Background Light
journal, October 2013


G[CLC]e[/CLC]V Emission from T[CLC]e[/CLC]V Blazars and Intergalactic Magnetic Fields
journal, November 2002

  • Dai, Z. G.; Zhang, B.; Gou, L. J.
  • The Astrophysical Journal, Vol. 580, Issue 1
  • DOI: 10.1086/345494

Evidence for a new light spin-zero boson from cosmological gamma-ray propagation?
journal, December 2007

  • De Angelis, Alessandro; Roncadelli, Marco; Mansutti, Oriana
  • Physical Review D, Vol. 76, Issue 12
  • DOI: 10.1103/PhysRevD.76.121301

TIME DELAY OF CASCADE RADIATION FOR TeV BLAZARS AND THE MEASUREMENT OF THE INTERGALACTIC MAGNETIC FIELD
journal, May 2011

  • Dermer, Charles D.; Cavadini, Massimo; Razzaque, Soebur
  • The Astrophysical Journal, Vol. 733, Issue 2
  • DOI: 10.1088/2041-8205/733/2/L21

Lower Limit on the Strength and Filling Factor of Extragalactic Magnetic Fields
journal, December 2010


Detection of the Cosmic γ-Ray Horizon from Multiwavelength Observations of Blazars
journal, May 2013


Extragalactic background light inferred from AEGIS galaxy-SED-type fractions: EBL from AEGIS galaxy-SED-type fractions
journal, October 2010


The extragalactic background light and the gamma-ray opacity of the universe
journal, March 2013


On the determination of the cosmic infrared background radiation from the high-energy spectrum of extragalactic gamma-ray sources
journal, December 1994

  • Dwek, Eli; Slavin, Jonathan
  • The Astrophysical Journal, Vol. 436
  • DOI: 10.1086/174943

The COBE Diffuse Infrared Background Experiment Search for the Cosmic Infrared Background. IV. Cosmological Implications
journal, November 1998

  • Dwek, E.; Arendt, R. G.; Hauser, M. G.
  • The Astrophysical Journal, Vol. 508, Issue 1
  • DOI: 10.1086/306382

Reanalysis of Voyager Ultraviolet Spectrometer Limits to the Extreme‐Ultraviolet and Far‐Ultraviolet Diffuse Astronomical Flux
journal, August 2000

  • Edelstein, Jerry; Bowyer, Stuart; Lampton, Michael
  • The Astrophysical Journal, Vol. 539, Issue 1
  • DOI: 10.1086/309192

Determination of intergalactic magnetic fields from gamma ray data
journal, October 2011


ROLE OF LINE-OF-SIGHT COSMIC-RAY INTERACTIONS IN FORMING THE SPECTRA OF DISTANT BLAZARS IN TeV GAMMA RAYS AND HIGH-ENERGY NEUTRINOS
journal, March 2011


Secondary Photons and Neutrinos from Cosmic Rays Produced by Distant Blazars
journal, April 2010


A new interpretation of the gamma-ray observations of distant active galactic nuclei
journal, March 2010


Predicted High Energy Break in the Isotropic Gamma Ray Spectrum: a Test of Cosmological Origin
journal, April 1970

  • Fazio, G. G.; Stecker, F. W.
  • Nature, Vol. 226, Issue 5241
  • DOI: 10.1038/226135a0

Inflationary magnetogenesis without the strong coupling problem II: constraints from CMB anisotropies and B-modes
journal, June 2014

  • Ferreira, Ricardo J. Z.; Jain, Rajeev Kumar; Sloth, Martin S.
  • Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 06
  • DOI: 10.1088/1475-7516/2014/06/053

Constraints on the Extragalactic Background Light from very high Energy Gamma-Ray Observations of Blazars
journal, June 2009


Modeling the Extragalactic Background Light from Stars and dust
journal, February 2010


Extragalactic optical-infrared background radiation, its time evolution and the cosmic photon-photon opacity
journal, June 2008


Universal upper limit on inflation energy scale from cosmic magnetic field
journal, October 2012


Critical constraint on inflationary magnetogenesis
journal, March 2014


THE FIRM REDSHIFT LOWER LIMIT OF THE MOST DISTANT TeV-DETECTED BLAZAR PKS 1424+240
journal, April 2013


A METHOD FOR SETTING UPPER LIMITS TO THE EXTRAGALACTIC BACKGROUND LIGHT WITH FERMI -LAT AND TeV OBSERVATIONS OF BLAZARS
journal, April 2010


A Novel Method for Measuring the Extragalactic Background Light: Fermi Application to the Lobes of Fornax A
journal, September 2008

  • Georganopoulos, Markos; Sambruna, Rita M.; Kazanas, Demosthenes
  • The Astrophysical Journal, Vol. 686, Issue 1
  • DOI: 10.1086/592833

GeV gamma-ray attenuation and the high-redshift UV background
journal, November 2009


Semi-analytic modelling of the extragalactic background light and consequences for extragalactic gamma-ray spectra: Modelling of the EBL and gamma-ray spectra
journal, April 2012

  • Gilmore, Rudy C.; Somerville, Rachel S.; Primack, Joel R.
  • Monthly Notices of the Royal Astronomical Society, Vol. 422, Issue 4
  • DOI: 10.1111/j.1365-2966.2012.20841.x

Opacity of the Universe to High-Energy Photons
journal, March 1967


Detection of high-energy gamma radiation from quasar 3C 279 by the EGRET telescope on the Compton Gamma Ray Observatory
journal, January 1992

  • Hartman, R. C.; Bertsch, D. L.; Fichtel, C. E.
  • The Astrophysical Journal, Vol. 385
  • DOI: 10.1086/186263

The Cosmic Infrared Background: Measurements and Implications
journal, September 2001


The COBE Diffuse Infrared Background Experiment Search for the Cosmic Infrared Background. I. Limits and Detections
journal, November 1998

  • Hauser, M. G.; Arendt, R. G.; Kelsall, T.
  • The Astrophysical Journal, Vol. 508, Issue 1
  • DOI: 10.1086/306379

Hardening of TeV gamma spectrum of active galactic nuclei in galaxy clusters by conversions of photons into axionlike particles
journal, October 2012


Probing the Nature of the Weakest Intergalactic Magnetic Fields with the High‐Energy Emission of Gamma‐Ray Bursts
journal, July 2008

  • Ichiki, Kiyotomo; Inoue, Susumu; Takahashi, Keitaro
  • The Astrophysical Journal, Vol. 682, Issue 1
  • DOI: 10.1086/588275

Polarimetric Observations of 15 Active Galactic Nuclei at High Frequencies: Jet Kinematics from Bimonthly Monitoring with the Very Long Baseline Array
journal, October 2005

  • Jorstad, Svetlana G.; Marscher, Alan P.; Lister, Matthew L.
  • The Astronomical Journal, Vol. 130, Issue 4
  • DOI: 10.1086/444593

ELMAG: A Monte Carlo simulation of electromagnetic cascades on the extragalactic background light and in magnetic fields
journal, April 2012

  • Kachelrieß, M.; Ostapchenko, S.; Tomàs, R.
  • Computer Physics Communications, Vol. 183, Issue 4
  • DOI: 10.1016/j.cpc.2011.12.025

A lower-limit flux for the extragalactic background light
journal, June 2010


“LEADING BLOB” MODEL IN A STOCHASTIC ACCELERATION SCENARIO: THE CASE OF THE 2009 FLARE OF Mkn 501
journal, November 2011


The 1997 reference of diffuse night sky brightness
journal, January 1998

  • Leinert, Ch.; Bowyer, S.; Haikala, L. K.
  • Astronomy and Astrophysics Supplement Series, Vol. 127, Issue 1
  • DOI: 10.1051/aas:1998105

Constraints on the Extragalactic Background Light from Gamma-Ray Observations of High-Redshift Quasars
journal, January 1996

  • Madau, Piero; Phinney, E. Sterl
  • The Astrophysical Journal, Vol. 456
  • DOI: 10.1086/176633

Deep galaxy counts, extragalactic background light and the stellar baryon budget
journal, February 2000


The Environment and Distribution of Emitting Electrons as a Function of Source Activity in Markarian 421
journal, April 2011

  • Mankuzhiyil, Nijil; Ansoldi, Stefano; Persic, Massimo
  • The Astrophysical Journal, Vol. 733, Issue 1
  • DOI: 10.1088/0004-637X/733/1/14

Blast: Resolving the Cosmic Submillimeter Background
journal, December 2009


Cosmic Optical Background: the view from Pioneer 10/11
journal, July 2011


Has the Optical Extragalactic Background Light Been Detected?
journal, July 2003

  • Mattila, K.
  • The Astrophysical Journal, Vol. 591, Issue 1
  • DOI: 10.1086/375182

The Likelihood Analysis of EGRET Data
journal, April 1996

  • Mattox, J. R.; Bertsch, D. L.; Chiang, J.
  • The Astrophysical Journal, Vol. 461
  • DOI: 10.1086/177068

Dark Matter Powered Stars: Constraints from the Extragalactic Background Light
journal, January 2012


The reduction of distant blazars’ inverse Compton cascade emission by plasma instability induced beam plateauing
journal, March 2015

  • Menzler, U.; Schlickeiser, R.
  • Monthly Notices of the Royal Astronomical Society, Vol. 448, Issue 4
  • DOI: 10.1093/mnras/stv232

An ISOCAM survey through gravitationally lensing galaxy clusters: I. Source lists and source counts for A370, A2218 and A2390
journal, September 2003


The Crab Nebula as a standard candle in very high-energy astrophysics
journal, November 2010


On detecting oscillations of gamma rays into axion-like particles in turbulent and coherent magnetic fields
journal, September 2014

  • Meyer, Manuel; Montanino, Daniele; Conrad, Jan
  • Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 09
  • DOI: 10.1088/1475-7516/2014/09/003

Limits on the extragalactic background light in the Fermi era
journal, June 2012


Relaxation of Blazar-Induced pair Beams in Cosmic Voids
journal, May 2013


Questions and Answers
journal, February 1948

  • Mosteller, Frederick; Winsor, Charles P.; Fischer, C. H.
  • The American Statistician, Vol. 2, Issue 1
  • DOI: 10.2307/2682364

Probing Intergalactic Magnetic Fields in the GLAST Era through Pair Echo Emission from TeV Blazars
journal, September 2008

  • Murase, Kohta; Takahashi, Keitaro; Inoue, Susumu
  • The Astrophysical Journal, Vol. 686, Issue 2
  • DOI: 10.1086/592997

Upper Limits on O [CSC]vi[/CSC] Emission From [ITAL]Voyager[/ITAL] Observations
journal, August 2001

  • Murthy, Jayant; Henry, R. C.; Shelton, R. L.
  • The Astrophysical Journal, Vol. 557, Issue 1
  • DOI: 10.1086/323041

Sensitivity of γ -ray telescopes for detection of magnetic fields in the intergalactic medium
journal, December 2009


No evidence for gamma-ray halos around active galactic nuclei resulting from intergalactic magnetic fields
journal, January 2011


Evidence for Strong Extragalactic Magnetic Fields from Fermi Observations of TeV Blazars
journal, April 2010


FERMI LARGE AREA TELESCOPE SECOND SOURCE CATALOG
journal, March 2012

  • Nolan, P. L.; Abdo, A. A.; Ackermann, M.
  • The Astrophysical Journal Supplement Series, Vol. 199, Issue 2
  • DOI: 10.1088/0067-0049/199/2/31

Probing High‐Redshift Radiation Fields with Gamma‐Ray Absorption
journal, May 2001

  • Oh, S. Peng
  • The Astrophysical Journal, Vol. 553, Issue 1
  • DOI: 10.1086/320641

A Measurement of Excess Antenna Temperature at 4080 Mc/s.
journal, July 1965

  • Penzias, A. A.; Wilson, R. W.
  • The Astrophysical Journal, Vol. 142
  • DOI: 10.1086/148307

THE COSMOLOGICAL IMPACT OF LUMINOUS TeV BLAZARS. III. IMPLICATIONS FOR GALAXY CLUSTERS AND THE FORMATION OF DWARF GALAXIES
journal, May 2012

  • Pfrommer, Christoph; Chang, Philip; Broderick, Avery E.
  • The Astrophysical Journal, Vol. 752, Issue 1
  • DOI: 10.1088/0004-637X/752/1/24

Detecting intergalactic magnetic fields using time delays in pulses of γ-rays
journal, March 1995


An infrared background-TeV gamma-ray crisis?
journal, November 2000


Detection of TeV photons from the active galaxy Markarian 421
journal, August 1992

  • Punch, M.; Akerlof, C. W.; Cawley, M. F.
  • Nature, Vol. 358, Issue 6386
  • DOI: 10.1038/358477a0

First stars and the extragalactic background light: how recent γ -ray observations constrain the early universe
journal, February 2009


Probing the peak of the star formation rate density with the extragalactic background light: Constraints on the SFRD from the EBL
journal, September 2012


LOWER LIMITS ON ULTRAHIGH-ENERGY COSMIC RAY AND JET POWERS OF TeV BLAZARS
journal, January 2012


GeV and Higher Energy Photon Interactions in Gamma‐Ray Burst Fireballs and Surroundings
journal, October 2004

  • Razzaque, Soebur; Meszaros, Peter; Zhang, Bing
  • The Astrophysical Journal, Vol. 613, Issue 2
  • DOI: 10.1086/423166

Probing the scale of ALP interactions with Fermi blazars
journal, August 2014


Evidence for a cosmological effect in γ -ray spectra of BL Lacertae
journal, June 2013


Hints of the existence of axionlike particles from the gamma-ray spectra of cosmological sources
journal, June 2009


The pair beam Production Spectrum from Photon-Photon Annihilation in Cosmic Voids
journal, October 2012


Plasma Effects on fast pair Beams in Cosmic Voids
journal, October 2012


Upper Limits on the Extragalactic Background Light from the Very High Energy Gamma‐Ray Spectra of Blazars
journal, August 2005

  • Schroedter, M.
  • The Astrophysical Journal, Vol. 628, Issue 2
  • DOI: 10.1086/431173

RELATIVISTIC PAIR BEAMS FROM TeV BLAZARS: A SOURCE OF REPROCESSED GeV EMISSION RATHER THAN INTERGALACTIC HEATING
journal, May 2014


Blazar γ-Rays, Shock Acceleration, and the Extragalactic Background Light
journal, September 2007

  • Stecker, Floyd W.; Baring, Matthew G.; Summerlin, Errol J.
  • The Astrophysical Journal, Vol. 667, Issue 1
  • DOI: 10.1086/522005

New Upper Limits on Intergalactic Infrared Radiation from High-Energy Astrophysics
journal, September 1993

  • Stecker, F. W.; de Jager, O. C.
  • The Astrophysical Journal, Vol. 415
  • DOI: 10.1086/187035

TeV gamma rays from 3C 279 - A possible probe of origin and intergalactic infrared radiation fields
journal, May 1992

  • Stecker, F. W.; de Jager, O. C.; Salamon, M. H.
  • The Astrophysical Journal, Vol. 390
  • DOI: 10.1086/186369

EXTREME BLAZARS STUDIED WITH FERMI -LAT AND SUZAKU : 1ES 0347–121 AND BLAZAR CANDIDATE HESS J1943+213
journal, May 2014


Search for CP violating signature of intergalactic magnetic helicity in the gamma-ray sky
journal, September 2014

  • Tashiro, Hiroyuki; Chen, Wenlei; Ferrer, Francesc
  • Monthly Notices of the Royal Astronomical Society: Letters, Vol. 445, Issue 1
  • DOI: 10.1093/mnrasl/slu134

Extreme TeV blazars and the intergalactic magnetic field: Extreme blazars and IGMF
journal, April 2011


The intergalactic magnetic field constrained by Fermi/Large Area Telescope observations of the TeV blazar 1ES 0229+200: IGMFs and GeV emission of 1ES 0229+200
journal, June 2010


Extragalactic magnetic fields constraints from simultaneous GeV–TeV observations of blazars
journal, April 2011


The extragalactic background light at 4400 A
journal, March 1983

  • Toller, G. N.
  • The Astrophysical Journal, Vol. 266
  • DOI: 10.1086/183982

Probing the intergalactic magnetic field with the anisotropy of the extragalactic gamma-ray background
journal, May 2013

  • Venters, T. M.; Pavlidou, V.
  • Monthly Notices of the Royal Astronomical Society, Vol. 432, Issue 4
  • DOI: 10.1093/mnras/stt697

FERMI /LAT OBSERVATIONS OF 1ES 0229+200: IMPLICATIONS FOR EXTRAGALACTIC MAGNETIC FIELDS AND BACKGROUND LIGHT
journal, February 2012


Opacity of the Universe to High-Energy Photons
journal, February 1966


Questions and Answers
journal, December 1972

  • Rubin, Ernest
  • The American Statistician, Vol. 26, Issue 5
  • DOI: 10.2307/2683786

    Works referencing / citing this record:

    2WHSP: A multi-frequency selected catalogue of high energy and very high energy γ -ray blazars and blazar candidates
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    Magnetogenesis from axion inflation
    journal, October 2016

    • Adshead, Peter; Giblin, John T.; Scully, Timothy R.
    • Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 10
    • DOI: 10.1088/1475-7516/2016/10/039

    Baryon asymmetry and gravitational waves from pseudoscalar inflation
    journal, December 2017

    • Jiménez, Daniel; Kamada, Kohei; Schmitz, Kai
    • Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 12
    • DOI: 10.1088/1475-7516/2017/12/011

    IMAGINE: a comprehensive view of the interstellar medium, Galactic magnetic fields and cosmic rays
    journal, August 2018

    • Boulanger, François; Enßlin, Torsten; Fletcher, Andrew
    • Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 08
    • DOI: 10.1088/1475-7516/2018/08/049

    Testing models of extragalactic γ-ray propagation using observations of extreme blazars in GeV and TeV energy ranges
    journal, January 2017


    New GTC spectroscopic data and a statistical study to better constrain the redshift of the BL Lac RGB J2243 + 203
    journal, November 2018

    • Rosa González, D.; Muriel, H.; Mayya, Y. D.
    • Monthly Notices of the Royal Astronomical Society, Vol. 482, Issue 4
    • DOI: 10.1093/mnras/sty3065

    The NuSTAR view on hard-TeV BL Lacs
    journal, May 2018

    • Costamante, L.; Bonnoli, G.; Tavecchio, F.
    • Monthly Notices of the Royal Astronomical Society, Vol. 477, Issue 3
    • DOI: 10.1093/mnras/sty857

    Looking for axion dark matter in dwarf spheroidal galaxies
    journal, October 2018


    Fast radio bursts
    journal, October 2018


    Magnetizing the Cosmic Web during Reionization
    journal, November 2018


    Baryon Loading Efficiency and Particle Acceleration Efficiency of Relativistic Jets: Cases for low Luminosity bl lacs
    journal, August 2016


    Impact of Plasma Instability on Constraint of the Intergalactic Magnetic Field
    journal, December 2018