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Title: The Imprint of the Extragalactic Background Light in the Gamma-Ray Spectra of Blazars

Abstract

The light emitted by stars and accreting compact objects through the history of the universe is encoded in the intensity of the extragalactic background light (EBL). Knowledge of the EBL is important to understand the nature of star formation and galaxy evolution, but direct measurements of the EBL are limited by galactic and other foreground emissions. In this paper, we report an absorption feature seen in the combined spectra of a sample of gamma-ray blazars out to a redshift of z ~ 1.6. Finally, this feature is caused by attenuation of gamma rays by the EBL at optical to ultraviolet frequencies and allowed us to measure the EBL flux density in this frequency band.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE; National Aeronautics and Space Administration (NASA)
Contributing Org.:
Fermi LAT Collaboration
OSTI Identifier:
1356611
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 338; Journal Issue: 6111; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Ackermann, M., Ajello, M., Allafort, A., Schady, P., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Blandford, R. D., Bloom, E. D., Borgland, A. W., Bottacini, E., Bouvier, A., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Cecchi, C., Charles, E., Chaves, R. C. G., Chekhtman, A., Cheung, C. C., Chiang, J., Chiaro, G., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cutini, S., D'Ammando, F., de Palma, F., Dermer, C. D., Digel, S. W., do Couto e Silva, E., Dominguez, A., Drell, P. S., Drlica-Wagner, A., Favuzzi, C., Fegan, S. J., Focke, W. B., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Grove, J. E., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hays, E., Jackson, M. S., Jogler, T., Kataoka, J., Knodlseder, J., Kuss, M., Lande, J., Larsson, S., Latronico, L., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., McEnery, J. E., Mehault, J., Michelson, P. F., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Tramacere, A., Nuss, E., Greiner, J., Ohno, M., Ohsugi, T., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Raino, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Reyes, L. C., Ritz, S., Rau, A., Romoli, C., Roth, M., Sanchez-Conde, M., Sanchez, D. A., Scargle, J. D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Stawarz, L., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tinivella, M., Torres, D. F., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., and Wood, M. The Imprint of the Extragalactic Background Light in the Gamma-Ray Spectra of Blazars. United States: N. p., 2012. Web. doi:10.1126/science.1227160.
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Ackermann, M., Ajello, M., Allafort, A., Schady, P., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Blandford, R. D., Bloom, E. D., Borgland, A. W., Bottacini, E., Bouvier, A., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Cecchi, C., Charles, E., Chaves, R. C. G., Chekhtman, A., Cheung, C. C., Chiang, J., Chiaro, G., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cutini, S., D'Ammando, F., de Palma, F., Dermer, C. D., Digel, S. W., do Couto e Silva, E., Dominguez, A., Drell, P. S., Drlica-Wagner, A., Favuzzi, C., Fegan, S. J., Focke, W. B., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Grove, J. E., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hays, E., Jackson, M. S., Jogler, T., Kataoka, J., Knodlseder, J., Kuss, M., Lande, J., Larsson, S., Latronico, L., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., McEnery, J. E., Mehault, J., Michelson, P. F., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Tramacere, A., Nuss, E., Greiner, J., Ohno, M., Ohsugi, T., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Raino, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Reyes, L. C., Ritz, S., Rau, A., Romoli, C., Roth, M., Sanchez-Conde, M., Sanchez, D. A., Scargle, J. D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Stawarz, L., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tinivella, M., Torres, D. F., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., & Wood, M. The Imprint of the Extragalactic Background Light in the Gamma-Ray Spectra of Blazars. United States. https://doi.org/10.1126/science.1227160
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Ackermann, M., Ajello, M., Allafort, A., Schady, P., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Blandford, R. D., Bloom, E. D., Borgland, A. W., Bottacini, E., Bouvier, A., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cavazzuti, E., Cecchi, C., Charles, E., Chaves, R. C. G., Chekhtman, A., Cheung, C. C., Chiang, J., Chiaro, G., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Cutini, S., D'Ammando, F., de Palma, F., Dermer, C. D., Digel, S. W., do Couto e Silva, E., Dominguez, A., Drell, P. S., Drlica-Wagner, A., Favuzzi, C., Fegan, S. J., Focke, W. B., Franckowiak, A., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Grove, J. E., Guiriec, S., Gustafsson, M., Hadasch, D., Hayashida, M., Hays, E., Jackson, M. S., Jogler, T., Kataoka, J., Knodlseder, J., Kuss, M., Lande, J., Larsson, S., Latronico, L., Longo, F., Loparco, F., Lovellette, M. N., Lubrano, P., Mazziotta, M. N., McEnery, J. E., Mehault, J., Michelson, P. F., Mizuno, T., Monte, C., Monzani, M. E., Morselli, A., Moskalenko, I. V., Murgia, S., Tramacere, A., Nuss, E., Greiner, J., Ohno, M., Ohsugi, T., Omodei, N., Orienti, M., Orlando, E., Ormes, J. F., Paneque, D., Perkins, J. S., Pesce-Rollins, M., Piron, F., Pivato, G., Porter, T. A., Raino, S., Rando, R., Razzano, M., Razzaque, S., Reimer, A., Reimer, O., Reyes, L. C., Ritz, S., Rau, A., Romoli, C., Roth, M., Sanchez-Conde, M., Sanchez, D. A., Scargle, J. D., Sgro, C., Siskind, E. J., Spandre, G., Spinelli, P., Stawarz, L., Suson, D. J., Takahashi, H., Tanaka, T., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tinivella, M., Torres, D. F., Tosti, G., Troja, E., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vianello, G., Vitale, V., Waite, A. P., Winer, B. L., Wood, K. S., and Wood, M. Fri . "The Imprint of the Extragalactic Background Light in the Gamma-Ray Spectra of Blazars". United States. https://doi.org/10.1126/science.1227160. https://www.osti.gov/servlets/purl/1356611.
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@article{osti_1356611,
title = {The Imprint of the Extragalactic Background Light in the Gamma-Ray Spectra of Blazars},
author = {Ackermann, M. and Ajello, M. and Allafort, A. and Schady, P. and Baldini, L. and Ballet, J. and Barbiellini, G. and Bastieri, D. and Bellazzini, R. and Blandford, R. D. and Bloom, E. D. and Borgland, A. W. and Bottacini, E. and Bouvier, A. and Bregeon, J. and Brigida, M. and Bruel, P. and Buehler, R. and Buson, S. and Caliandro, G. A. and Cameron, R. A. and Caraveo, P. A. and Cavazzuti, E. and Cecchi, C. and Charles, E. and Chaves, R. C. G. and Chekhtman, A. and Cheung, C. C. and Chiang, J. and Chiaro, G. and Ciprini, S. and Claus, R. and Cohen-Tanugi, J. and Conrad, J. and Cutini, S. and D'Ammando, F. and de Palma, F. and Dermer, C. D. and Digel, S. W. and do Couto e Silva, E. and Dominguez, A. and Drell, P. S. and Drlica-Wagner, A. and Favuzzi, C. and Fegan, S. J. and Focke, W. B. and Franckowiak, A. and Fukazawa, Y. and Funk, S. and Fusco, P. and Gargano, F. and Gasparrini, D. and Gehrels, N. and Germani, S. and Giglietto, N. and Giordano, F. and Giroletti, M. and Glanzman, T. and Godfrey, G. and Grenier, I. A. and Grove, J. E. and Guiriec, S. and Gustafsson, M. and Hadasch, D. and Hayashida, M. and Hays, E. and Jackson, M. S. and Jogler, T. and Kataoka, J. and Knodlseder, J. and Kuss, M. and Lande, J. and Larsson, S. and Latronico, L. and Longo, F. and Loparco, F. and Lovellette, M. N. and Lubrano, P. and Mazziotta, M. N. and McEnery, J. E. and Mehault, J. and Michelson, P. F. and Mizuno, T. and Monte, C. and Monzani, M. E. and Morselli, A. and Moskalenko, I. V. and Murgia, S. and Tramacere, A. and Nuss, E. and Greiner, J. and Ohno, M. and Ohsugi, T. and Omodei, N. and Orienti, M. and Orlando, E. and Ormes, J. F. and Paneque, D. and Perkins, J. S. and Pesce-Rollins, M. and Piron, F. and Pivato, G. and Porter, T. A. and Raino, S. and Rando, R. and Razzano, M. and Razzaque, S. and Reimer, A. and Reimer, O. and Reyes, L. C. and Ritz, S. and Rau, A. and Romoli, C. and Roth, M. and Sanchez-Conde, M. and Sanchez, D. A. and Scargle, J. D. and Sgro, C. and Siskind, E. J. and Spandre, G. and Spinelli, P. and Stawarz, L. and Suson, D. J. and Takahashi, H. and Tanaka, T. and Thayer, J. G. and Thompson, D. J. and Tibaldo, L. and Tinivella, M. and Torres, D. F. and Tosti, G. and Troja, E. and Usher, T. L. and Vandenbroucke, J. and Vasileiou, V. and Vianello, G. and Vitale, V. and Waite, A. P. and Winer, B. L. and Wood, K. S. and Wood, M.},
abstractNote = {The light emitted by stars and accreting compact objects through the history of the universe is encoded in the intensity of the extragalactic background light (EBL). Knowledge of the EBL is important to understand the nature of star formation and galaxy evolution, but direct measurements of the EBL are limited by galactic and other foreground emissions. In this paper, we report an absorption feature seen in the combined spectra of a sample of gamma-ray blazars out to a redshift of z ~ 1.6. Finally, this feature is caused by attenuation of gamma rays by the EBL at optical to ultraviolet frequencies and allowed us to measure the EBL flux density in this frequency band.},
doi = {10.1126/science.1227160},
journal = {Science},
number = 6111,
volume = 338,
place = {United States},
year = {Fri Nov 30 00:00:00 EST 2012},
month = {Fri Nov 30 00:00:00 EST 2012}
}
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    Empirical multi-wavelength prediction method for very high energy gamma-ray emitting BL Lacertae objects
    journal, December 2017

    MAGIC observations of the February 2014 flare of 1ES 1011+496 and ensuing constraint of the EBL density
    text, January 2016

    • Ahnen, M. L.; Ansoldi, S.; Antonelli, L. A.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2016-04000

    SPECTRAL ANALYSIS OF FERMI -LAT BLAZARS ABOVE 50 GEV
    journal, November 2015

    THE EXTRAGALACTIC BACKGROUND LIGHT, THE HUBBLE CONSTANT, AND ANOMALIES: CONCLUSIONS FROM 20 YEARS OF TeV GAMMA-RAY OBSERVATIONS
    journal, October 2015

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

    Discovery of very high energy gamma rays from 1ES 1440+122
    journal, June 2016

    • Archambault, S.; Archer, A.; Barnacka, A.
    • Monthly Notices of the Royal Astronomical Society, Vol. 461, Issue 1
    • DOI: 10.1093/mnras/stw1319

    GeV-TeV γ $\gamma $ -ray energy spectral break of BL Lac objects
    journal, August 2018

    Missing Gamma-Ray Halos and the Need for New Physics in the Gamma-Ray Sky
    journal, November 2018

    • Broderick, Avery E.; Tiede, Paul; Chang, Philip
    • The Astrophysical Journal, Vol. 868, Issue 2
    • DOI: 10.3847/1538-4357/aae5f2

    High-energy Neutrino Flares from X-Ray Bright and Dark Tidal Disruption Events
    journal, March 2017

    • Senno, Nicholas; Murase, Kohta; Mészáros, Peter
    • The Astrophysical Journal, Vol. 838, Issue 1
    • DOI: 10.3847/1538-4357/aa6344

    Measurement of the extragalactic background light using MAGIC and Fermi-LAT gamma-ray observations of blazars up to z = 1
    text, January 2019

    • Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2019-03716

    Progress in unveiling extreme particle acceleration in persistent astrophysical jets
    journal, January 2020

    The Extragalactic Background Light from the Measurements of the Attenuation of High-Energy Gamma-Ray Spectrum
    journal, July 2013

    Exploring the multiband emission of TXS 0536+145: the most distant γ-ray flaring blazar
    journal, September 2014

    • Orienti, M.; D'Ammando, F.; Giroletti, M.
    • Monthly Notices of the Royal Astronomical Society, Vol. 444, Issue 4
    • DOI: 10.1093/mnras/stu1644

    MAGIC observations of the February 2014 flare of 1ES 1011+496 and ensuing constraint of the EBL density
    journal, May 2016

    Leptonic and Hadronic Modeling of Fermi -LAT Hard Spectrum Quasars and Predictions for High-energy Polarization
    journal, August 2018

    • Paliya, Vaidehi S.; Zhang, Haocheng; Böttcher, Markus
    • The Astrophysical Journal, Vol. 863, Issue 1
    • DOI: 10.3847/1538-4357/aad1f0

    Cosmic PeV neutrinos and the sources of ultrahigh energy protons
    journal, December 2014

    Diffuse γ-Ray Emission from Misaligned Active Galactic Nuclei
    journal, December 2013

    Multi-wavelength characterization of the blazar S5 0716+714 during an unprecedented outburst phase
    journal, November 2018

    Active galactic nuclei: what’s in a name?
    journal, August 2017

    • Padovani, P.; Alexander, D. M.; Assef, R. J.
    • The Astronomy and Astrophysics Review, Vol. 25, Issue 1
    • DOI: 10.1007/s00159-017-0102-9

    Multi-wavelength characterization of the blazar S5 0716+714 during an unprecedented outburst phase
    text, January 2018

    • Ahnen, M. L.; Ansoldi, S.; Antonelli, L. A.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2018-05619

    Search for Cosmic-Ray-Induced Gamma-Ray Emission in Galaxy Clusters
    journal, April 2014

    PSR J2021+4026 IN THE GAMMA CYGNI REGION: THE FIRST VARIABLE γ-RAY PULSAR SEEN BY THE Fermi LAT
    journal, October 2013

    Measurement of the extragalactic background light using MAGIC and Fermi-LAT gamma-ray observations of blazars up to z = 1
    journal, April 2019

    • Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.
    • Monthly Notices of the Royal Astronomical Society, Vol. 486, Issue 3
    • DOI: 10.1093/mnras/stz943

    Extragalactic Background Light from Hierarchical Galaxy Formation: Gamma-Ray Attenuation up to the Epoch of Cosmic Reionization and the First Stars
    journal, April 2013

    • Inoue, Yoshiyuki; Inoue, Susumu; Kobayashi, Masakazu A. R.
    • The Astrophysical Journal, Vol. 768, Issue 2
    • DOI: 10.1088/0004-637x/768/2/197

    Identifying the 3FHL Catalog. III. Results of the CTIO-COSMOS Optical Spectroscopy Campaign
    journal, February 2019

    • Desai, A.; Marchesi, S.; Rajagopal, M.
    • The Astrophysical Journal Supplement Series, Vol. 241, Issue 1
    • DOI: 10.3847/1538-4365/ab01fc

    Discovery of very high energy γ -ray emission from the BL Lacertae object PKS 0301−243 with H.E.S.S.
    journal, November 2013

    Constraints on the Intergalactic Magnetic Field with Gamma-Ray Observations of Blazars
    journal, November 2015

    • Finke, Justin D.; Reyes, Luis C.; Georganopoulos, Markos
    • The Astrophysical Journal, Vol. 814, Issue 1
    • DOI: 10.1088/0004-637x/814/1/20

    Revisit of Nonlinear Landau Damping for Electrostatic Instability Driven by Blazar-induced Pair Beams
    journal, February 2019

    Multi-TeV Flaring from High-energy Blazars: An Evidence of the Photohadronic Process
    journal, October 2019

    • Sahu, Sarira; López Fortín, Carlos E.; Nagataki, Shigehiro
    • The Astrophysical Journal, Vol. 884, Issue 1
    • DOI: 10.3847/2041-8213/ab43c7

    Probing the very high energy γ-ray spectral curvature in the blazar PG 1553+113 with the MAGIC telescopes
    journal, May 2015

    • Aleksić, J.; Ansoldi, S.; Antonelli, L. A.
    • Monthly Notices of the Royal Astronomical Society, Vol. 450, Issue 4
    • DOI: 10.1093/mnras/stv811

    The Hubble constant.
    journal, June 1993

    On the origin of gamma-rays in Fermi blazars: beyondthe broad-line region
    journal, May 2018

    • Costamante, L.; Cutini, S.; Tosti, G.
    • Monthly Notices of the Royal Astronomical Society, Vol. 477, Issue 4
    • DOI: 10.1093/mnras/sty887

    New High- z BL Lacs Using the Photometric Method with Swift and SARA
    journal, May 2018

    Limits on dark matter annihilation signals from the Fermi LAT 4-year measurement of the isotropic gamma-ray background
    journal, September 2015

    Fermi-LAT high-z active galactic nuclei and the extragalactic background light
    journal, May 2017

    • Armstrong, Thomas; Brown, Anthony M.; Chadwick, Paula M.
    • Monthly Notices of the Royal Astronomical Society, Vol. 470, Issue 4
    • DOI: 10.1093/mnras/stx1309

    Evidence against Star-forming Galaxies as the Dominant Source of Icecube Neutrinos
    journal, February 2017

    New synthesis models of consistent extragalactic background light over cosmic time
    journal, January 2019

    • Khaire, Vikram; Srianand, Raghunathan
    • Monthly Notices of the Royal Astronomical Society, Vol. 484, Issue 3
    • DOI: 10.1093/mnras/stz174

    Deep Broadband Observations of the Distant Gamma-Ray Blazar pks 1424+240
    journal, March 2014

    An Empirical Determination of the Intergalactic Background Light from uv to fir Wavelengths Using fir deep Galaxy Surveys and the Gamma-Ray Opacity of the Universe
    journal, August 2016

    • Stecker, Floyd W.; Scully, Sean T.; Malkan, Matthew A.
    • The Astrophysical Journal, Vol. 827, Issue 1
    • DOI: 10.3847/0004-637x/827/1/6

    NuSTAR Observations and Multiwavelength Modeling of the High-redshift BL Lacertae Object 4FGL J2146.5-1344
    journal, January 2020

    Discovery of very high energy γ -ray emission from the BL Lacertae object PKS 0301−243 with H.E.S.S.
    text, January 2013

    • Abramowski, A.; Acero, F.; Aharonian, F.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/desy-2014-00655

    Search for very high energy gamma-rays from the z = 0.896 quasar 4C +55.17 with the MAGIC telescopes
    journal, March 2014

    • Aleksi , J.; Ansoldi, S.; Antonelli, L. A.
    • Monthly Notices of the Royal Astronomical Society, Vol. 440, Issue 1
    • DOI: 10.1093/mnras/stu227

    Classification of New X-Ray Counterparts for Fermi Unassociated Gamma-Ray Sources Using the Swift X-Ray Telescope
    journal, December 2019

    • Kaur, Amanpreet; Falcone, Abraham D.; Stroh, Michael D.
    • The Astrophysical Journal, Vol. 887, Issue 1
    • DOI: 10.3847/1538-4357/ab4ceb

    Breaks in gamma-ray spectra of distant blazars and transparency of the Universe
    journal, November 2014

    The extragalactic background light revisited and the cosmic photon-photon opacity
    journal, July 2017

    Towards a medium-scale axion helioscope and haloscope
    journal, November 2017

    Measurement of the EBL spectral energy distribution using the VHE γ -ray spectra of H.E.S.S. blazars
    journal, October 2017

    Spectroscopy of high-energy BL Lacertae objects with X-shooter on the VLT
    journal, April 2014

    A New Measurement of the Hubble Constant and Matter Content of the Universe Using Extragalactic Background Light γ -Ray Attenuation
    journal, November 2019

    Bow Ties in the Sky. II. Searching for Gamma-Ray Halos in the Fermi Sky Using Anisotropy
    journal, November 2017

    • Tiede, Paul; Broderick, Avery E.; Shalaby, Mohamad
    • The Astrophysical Journal, Vol. 850, Issue 2
    • DOI: 10.3847/1538-4357/aa9375

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

    Cosmological magnetic fields: their generation, evolution and observation
    journal, June 2013

    Extragalactic background light measurements and applications
    journal, March 2016

    Progress in unveiling extreme particle acceleration in persistent astrophysical jets
    text, January 2020

    • Biteau, J.; Prandini, E.; Costamante, L.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2020-00840

    THE COSMIC EVOLUTION OF FERMI BL LACERTAE OBJECTS
    journal, December 2013

    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

    The Hubble Constant
    journal, September 2007

    Search for very high energy gamma-rays from the z = 0.896 quasar 4C +55.17 with the MAGIC telescopes
    text, January 2014

    • Aleksić, J.; Ansoldi, S.; Antonelli, L. A.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2014-04520

    Probing the very high energy $\gamma$-ray spectral curvature in the blazar PG 1553+113 with the MAGIC telescopes
    text, January 2015

    • Aleksi, J.; Ansoldi, S.; Antonelli, L. A.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2016-00403

    A new measurement of the Hubble constant and matter content of the Universe using extragalactic background light $\gamma$-ray attenuation
    text, January 2019

    • Domínguez, Alberto; Wojtak, Radoslaw; Finke, Justin
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2020-00208

    The Hubble Constant
    journal, April 1992

    Probing the very high energy γ-ray spectral curvature in the blazar PG 1553+113 with the MAGIC telescopes
    text, January 2015

    The Cosmic Evolution of Fermi BL Lacertae Objects
    text, January 2013

    Spectral analysis of Fermi-LAT blazars above 50 GeV
    text, January 2015

    Evidence against star-forming galaxies as the dominant source of IceCube neutrinos
    text, January 2015

    High-Energy Neutrino Flares From X-Ray Bright and Dark Tidal Disruptions Events
    text, January 2016

    Bow Ties in the Sky II: Searching for Gamma-ray Halos in the Fermi Sky Using Anisotropy
    text, January 2017

    The extragalactic background light revisited and the cosmic photon-photon opacity
    text, January 2017

    Towards a medium-scale axion helioscope and haloscope
    text, January 2017

    Active Galactic Nuclei: what's in a name?
    text, January 2017

    New synthesis models of consistent extragalactic background light over cosmic time
    text, January 2018

    On the origin of gamma rays in Fermi blazars: beyond the broad line region
    text, January 2018

    Identifying the 3FHL catalog: I. Results of the KOSMOS optical spectroscopy campaign
    text, January 2018

    Multi-TeV flaring from high energy blazars: An evidence of the photohadronic process
    text, January 2019

    2FHL: The second Catalog of hard {\it Fermi}-LAT sources
    preprint, January 2015

    Axion-photon Propagation in Magnetized Universe
    text, January 2015

    Seeking dark matter with $γ$-ray attenuation
    text, January 2022

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