Curvature in the very-high energy gamma-ray spectrum of M 87

Aharonian, F.; Ait Benkhali, F.; Aschersleben, J.; Ashkar, H.; Backes, M.; Barbosa Martins, V.; Batzofin, R.; Becherini, Y.; Berge, D.; Bernlöhr, K.; Böttcher, M.; Boisson, C.; Bolmont, J.; de Bony de Lavergne, M.; Bradascio, F.; Brose, R.; Brun, F.; Bruno, B.; Bulik, T.; Burger-Scheidlin, C.; Bylund, T.; Casanova, S.; Cecil, R.; Celic, J.; Cerruti, M.; Chand, T.; Chandra, S.; Chen, A.; Chibueze, J.; Chibueze, O.; Collins, T.; Cotter, G.; Damascene Mbarubucyeye, J.; Djannati-Ataï, A.; Djuvsland, J.; Dmytriiev, A.; Egberts, K.; Einecke, S.; Fegan, S.; Fontaine, G.; Funk, S.; Gabici, S.; Glicenstein, J. F.; Glombitza, J.; Grolleron, G.; Haerer, L.; Hofmann, W.; Holch, T. L.; Holler, M.; Horns, D.; Jamrozy, Marek; Jankowsky, F.; Joshi, V.; Jung-Richardt, I.; Kasai, E.; Katarzyński, K.; Khatoon, R.; Khélifi, B.; Kluźniak, W.; Komin, Nu.; Kosack, K.; Kostunin, D.; Kundu, A.; Lang, R. G.; Le Stum, S.; Leitl, F.; Lemière, A.; Lemoine-Goumard, M.; Lenain, J.-P.; Lypova, I.; Luashvili, A.; Mackey, J.; Malyshev, D.; Martí-Devesa, G.; Marx, R.; Mehta, A.; Meyer, M.; Mitchell, A.; Moderski, R.; Moghadam, M. O.; Mohrmann, L.; Montanari, A.; Moulin, E.; Murach, T.; de Naurois, M.; Niemiec, J.; Ohm, S.; Olivera-Nieto, L.; de Ona Wilhelmi, E.; Panny, S.; Panter, M.; Parsons, R. D.; Pensec, U.; Pita, S.; Pühlhofer, G.; Punch, M.; Quirrenbach, A.; Regeard, M.; Reimer, A.; Reimer, O.; Ren, H.; Reville, B.; Rieger, F.; Rudak, B.; Ruiz-Velasco, E.; Sahakian, V.; Salzmann, H.; Santangelo, A.; Sasaki, M.; Schüssler, F.; Schutte, H. M.; Shapopi, J. N. S.; Sol, H.; Spencer, S.; Stawarz, Łukasz; Steenkamp, R.; Steinmassl, S.; Steppa, C.; Streil, K.; Takahashi, T.; Tanaka, T.; Taylor, A. M.; Terrier, R.; Tsirou, M.; van Eldik, C.; Venter, C.; Vink, J.; Wach, T.; Wagner, S. J.; Wierzcholska, A.; Zacharias, M.; Zdziarski, A. A.; Zech, A.; Zilberman, P.; Żywucka, N.

doi:10.1051/0004-6361/202348913

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Curvature in the very-high energy gamma-ray spectrum of M 87

2024

journal article

article

10.1051/0004-6361/202348913

Journal

Astronomy and Astrophysics

140

Author

Aharonian F.

Ait Benkhali F.

Aschersleben J.

Ashkar H.

Backes M.

Institution

H.E.S.S. Collaboration

Volume

685

Pages

A96

ISSN

0004-6361

eISSN

1432-0746

Keywords in English

astroparticle physics

galaxies: active

galaxies: jets

gamma rays: galaxies

infrared: general

Language

English

Journal language

English

Abstract in English

The radio galaxy M 87 is a variable very-high energy (VHE) gamma-ray source, exhibiting three major flares, which were reported in 2005, 2008, and 2010. Despite extensive studies, the origin of the VHE gamma-ray emission is not yet fully understood. In this study, we investigate the VHE gamma-ray spectrum of M 87 during states of high gamma-ray activity, utilizing 20.2 h of H.E.S.S. observations. Our findings indicate a preference for a curved spectrum, characterized by a log-parabola model with extra-galactic background light (EBL) model above 0.3 TeV at the 4σ level, compared to a power-law spectrum with EBL. We investigate the degeneracy between the absorption feature and the EBL normalization and derive upper limits on EBL models that are mainly sensitive in the wavelength range of 12.4 μm–40 μm.

Scopus© citations

2

dc.abstract.en	The radio galaxy M 87 is a variable very-high energy (VHE) gamma-ray source, exhibiting three major flares, which were reported in 2005, 2008, and 2010. Despite extensive studies, the origin of the VHE gamma-ray emission is not yet fully understood. In this study, we investigate the VHE gamma-ray spectrum of M 87 during states of high gamma-ray activity, utilizing 20.2 h of H.E.S.S. observations. Our findings indicate a preference for a curved spectrum, characterized by a log-parabola model with extra-galactic background light (EBL) model above 0.3 TeV at the 4σ level, compared to a power-law spectrum with EBL. We investigate the degeneracy between the absorption feature and the EBL normalization and derive upper limits on EBL models that are mainly sensitive in the wavelength range of 12.4 μm–40 μm.
dc.affiliation	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne
dc.contributor.author	Aharonian, F.
dc.contributor.author	Ait Benkhali, F.
dc.contributor.author	Aschersleben, J.
dc.contributor.author	Ashkar, H.
dc.contributor.author	Backes, M.
dc.contributor.author	Barbosa Martins, V.
dc.contributor.author	Batzofin, R.
dc.contributor.author	Becherini, Y.
dc.contributor.author	Berge, D.
dc.contributor.author	Bernlöhr, K.
dc.contributor.author	Böttcher, M.
dc.contributor.author	Boisson, C.
dc.contributor.author	Bolmont, J.
dc.contributor.author	de Bony de Lavergne, M.
dc.contributor.author	Bradascio, F.
dc.contributor.author	Brose, R.
dc.contributor.author	Brun, F.
dc.contributor.author	Bruno, B.
dc.contributor.author	Bulik, T.
dc.contributor.author	Burger-Scheidlin, C.
dc.contributor.author	Bylund, T.
dc.contributor.author	Casanova, S.
dc.contributor.author	Cecil, R.
dc.contributor.author	Celic, J.
dc.contributor.author	Cerruti, M.
dc.contributor.author	Chand, T.
dc.contributor.author	Chandra, S.
dc.contributor.author	Chen, A.
dc.contributor.author	Chibueze, J.
dc.contributor.author	Chibueze, O.
dc.contributor.author	Collins, T.
dc.contributor.author	Cotter, G.
dc.contributor.author	Damascene Mbarubucyeye, J.
dc.contributor.author	Djannati-Ataï, A.
dc.contributor.author	Djuvsland, J.
dc.contributor.author	Dmytriiev, A.
dc.contributor.author	Egberts, K.
dc.contributor.author	Einecke, S.
dc.contributor.author	Fegan, S.
dc.contributor.author	Fontaine, G.
dc.contributor.author	Funk, S.
dc.contributor.author	Gabici, S.
dc.contributor.author	Glicenstein, J. F.
dc.contributor.author	Glombitza, J.
dc.contributor.author	Grolleron, G.
dc.contributor.author	Haerer, L.
dc.contributor.author	Hofmann, W.
dc.contributor.author	Holch, T. L.
dc.contributor.author	Holler, M.
dc.contributor.author	Horns, D.
dc.contributor.author	Jamrozy, Marek - 128434
dc.contributor.author	Jankowsky, F.
dc.contributor.author	Joshi, V.
dc.contributor.author	Jung-Richardt, I.
dc.contributor.author	Kasai, E.
dc.contributor.author	Katarzyński, K.
dc.contributor.author	Khatoon, R.
dc.contributor.author	Khélifi, B.
dc.contributor.author	Kluźniak, W.
dc.contributor.author	Komin, Nu.
dc.contributor.author	Kosack, K.
dc.contributor.author	Kostunin, D.
dc.contributor.author	Kundu, A.
dc.contributor.author	Lang, R. G.
dc.contributor.author	Le Stum, S.
dc.contributor.author	Leitl, F.
dc.contributor.author	Lemière, A.
dc.contributor.author	Lemoine-Goumard, M.
dc.contributor.author	Lenain, J.-P.
dc.contributor.author	Lypova, I.
dc.contributor.author	Luashvili, A.
dc.contributor.author	Mackey, J.
dc.contributor.author	Malyshev, D.
dc.contributor.author	Martí-Devesa, G.
dc.contributor.author	Marx, R.
dc.contributor.author	Mehta, A.
dc.contributor.author	Meyer, M.
dc.contributor.author	Mitchell, A.
dc.contributor.author	Moderski, R.
dc.contributor.author	Moghadam, M. O.
dc.contributor.author	Mohrmann, L.
dc.contributor.author	Montanari, A.
dc.contributor.author	Moulin, E.
dc.contributor.author	Murach, T.
dc.contributor.author	de Naurois, M.
dc.contributor.author	Niemiec, J.
dc.contributor.author	Ohm, S.
dc.contributor.author	Olivera-Nieto, L.
dc.contributor.author	de Ona Wilhelmi, E.
dc.contributor.author	Panny, S.
dc.contributor.author	Panter, M.
dc.contributor.author	Parsons, R. D.
dc.contributor.author	Pensec, U.
dc.contributor.author	Pita, S.
dc.contributor.author	Pühlhofer, G.
dc.contributor.author	Punch, M.
dc.contributor.author	Quirrenbach, A.
dc.contributor.author	Regeard, M.
dc.contributor.author	Reimer, A.
dc.contributor.author	Reimer, O.
dc.contributor.author	Ren, H.
dc.contributor.author	Reville, B.
dc.contributor.author	Rieger, F.
dc.contributor.author	Rudak, B.
dc.contributor.author	Ruiz-Velasco, E.
dc.contributor.author	Sahakian, V.
dc.contributor.author	Salzmann, H.
dc.contributor.author	Santangelo, A.
dc.contributor.author	Sasaki, M.
dc.contributor.author	Schüssler, F.
dc.contributor.author	Schutte, H. M.
dc.contributor.author	Shapopi, J. N. S.
dc.contributor.author	Sol, H.
dc.contributor.author	Spencer, S.
dc.contributor.author	Stawarz, Łukasz - 132081
dc.contributor.author	Steenkamp, R.
dc.contributor.author	Steinmassl, S.
dc.contributor.author	Steppa, C.
dc.contributor.author	Streil, K.
dc.contributor.author	Takahashi, T.
dc.contributor.author	Tanaka, T.
dc.contributor.author	Taylor, A. M.
dc.contributor.author	Terrier, R.
dc.contributor.author	Tsirou, M.
dc.contributor.author	van Eldik, C.
dc.contributor.author	Venter, C.
dc.contributor.author	Vink, J.
dc.contributor.author	Wach, T.
dc.contributor.author	Wagner, S. J.
dc.contributor.author	Wierzcholska, A.
dc.contributor.author	Zacharias, M.
dc.contributor.author	Zdziarski, A. A.
dc.contributor.author	Zech, A.
dc.contributor.author	Zilberman, P.
dc.contributor.author	Żywucka, N.
dc.contributor.institution	H.E.S.S. Collaboration
dc.date.accessioned	2024-10-09T08:05:51Z
dc.date.available	2024-10-09T08:05:51Z
dc.date.issued	2024
dc.date.openaccess	0
dc.description.accesstime	w momencie opublikowania
dc.description.physical	A96
dc.description.version	ostateczna wersja wydawcy
dc.description.volume	685
dc.identifier.doi	10.1051/0004-6361/202348913
dc.identifier.eissn	1432-0746
dc.identifier.issn	0004-6361
dc.identifier.uri	https://ruj.uj.edu.pl/handle/item/450974
dc.language	eng
dc.language.container	eng
dc.rights	Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licence	CC-BY
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.share.type	otwarte czasopismo
dc.subject.en	astroparticle physics
dc.subject.en	galaxies: active
dc.subject.en	galaxies: jets
dc.subject.en	gamma rays: galaxies
dc.subject.en	infrared: general
dc.subtype	Article
dc.title	Curvature in the very-high energy gamma-ray spectrum of M 87
dc.title.journal	Astronomy and Astrophysics
dc.type	JournalArticle
dspace.entity.type	Publication	en

dc.abstract.en

The radio galaxy M 87 is a variable very-high energy (VHE) gamma-ray source, exhibiting three major flares, which were reported in 2005, 2008, and 2010. Despite extensive studies, the origin of the VHE gamma-ray emission is not yet fully understood. In this study, we investigate the VHE gamma-ray spectrum of M 87 during states of high gamma-ray activity, utilizing 20.2 h of H.E.S.S. observations. Our findings indicate a preference for a curved spectrum, characterized by a log-parabola model with extra-galactic background light (EBL) model above 0.3 TeV at the 4σ level, compared to a power-law spectrum with EBL. We investigate the degeneracy between the absorption feature and the EBL normalization and derive upper limits on EBL models that are mainly sensitive in the wavelength range of 12.4 μm–40 μm.

dc.affiliation

Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne

dc.contributor.author

Aharonian, F.

dc.contributor.author

Ait Benkhali, F.

dc.contributor.author

Aschersleben, J.

dc.contributor.author

Ashkar, H.

dc.contributor.author

Backes, M.

dc.contributor.author

Barbosa Martins, V.

dc.contributor.author

Batzofin, R.

dc.contributor.author

Becherini, Y.

dc.contributor.author

Berge, D.

dc.contributor.author

Bernlöhr, K.

dc.contributor.author

Böttcher, M.

dc.contributor.author

Boisson, C.

dc.contributor.author

Bolmont, J.

dc.contributor.author

de Bony de Lavergne, M.

dc.contributor.author

Bradascio, F.

dc.contributor.author

Brose, R.

dc.contributor.author

Brun, F.

dc.contributor.author

Bruno, B.

dc.contributor.author

Bulik, T.

dc.contributor.author

Burger-Scheidlin, C.

dc.contributor.author

Bylund, T.

dc.contributor.author

Casanova, S.

dc.contributor.author

Cecil, R.

dc.contributor.author

Celic, J.

dc.contributor.author

Cerruti, M.

dc.contributor.author

Chand, T.

dc.contributor.author

Chandra, S.

dc.contributor.author

Chen, A.

dc.contributor.author

Chibueze, J.

dc.contributor.author

Chibueze, O.

dc.contributor.author

Collins, T.

dc.contributor.author

Cotter, G.

dc.contributor.author

Damascene Mbarubucyeye, J.

dc.contributor.author

Djannati-Ataï, A.

dc.contributor.author

Djuvsland, J.

dc.contributor.author

Dmytriiev, A.

dc.contributor.author

Egberts, K.

dc.contributor.author

Einecke, S.

dc.contributor.author

Fegan, S.

dc.contributor.author

Fontaine, G.

dc.contributor.author

Funk, S.

dc.contributor.author

Gabici, S.

dc.contributor.author

Glicenstein, J. F.

dc.contributor.author

Glombitza, J.

dc.contributor.author

Grolleron, G.

dc.contributor.author

Haerer, L.

dc.contributor.author

Hofmann, W.

dc.contributor.author

Holch, T. L.

dc.contributor.author

Holler, M.

dc.contributor.author

Horns, D.

dc.contributor.author

Jamrozy, Marek - 128434

dc.contributor.author

Jankowsky, F.

dc.contributor.author

Joshi, V.

dc.contributor.author

Jung-Richardt, I.

dc.contributor.author

Kasai, E.

dc.contributor.author

Katarzyński, K.

dc.contributor.author

Khatoon, R.

dc.contributor.author

Khélifi, B.

dc.contributor.author

Kluźniak, W.

dc.contributor.author

Komin, Nu.

dc.contributor.author

Kosack, K.

dc.contributor.author

Kostunin, D.

dc.contributor.author

Kundu, A.

dc.contributor.author

Lang, R. G.

dc.contributor.author

Le Stum, S.

dc.contributor.author

Leitl, F.

dc.contributor.author

Lemière, A.

dc.contributor.author

Lemoine-Goumard, M.

dc.contributor.author

Lenain, J.-P.

dc.contributor.author

Lypova, I.

dc.contributor.author

Luashvili, A.

dc.contributor.author

Mackey, J.

dc.contributor.author

Malyshev, D.

dc.contributor.author

Martí-Devesa, G.

dc.contributor.author

Marx, R.

dc.contributor.author

Mehta, A.

dc.contributor.author

Meyer, M.

dc.contributor.author

Mitchell, A.

dc.contributor.author

Moderski, R.

dc.contributor.author

Moghadam, M. O.

dc.contributor.author

Mohrmann, L.

dc.contributor.author

Montanari, A.

dc.contributor.author

Moulin, E.

dc.contributor.author

Murach, T.

dc.contributor.author

de Naurois, M.

dc.contributor.author

Niemiec, J.

dc.contributor.author

Ohm, S.

dc.contributor.author

Olivera-Nieto, L.

dc.contributor.author

de Ona Wilhelmi, E.

dc.contributor.author

Panny, S.

dc.contributor.author

Panter, M.

dc.contributor.author

Parsons, R. D.

dc.contributor.author

Pensec, U.

dc.contributor.author

Pita, S.

dc.contributor.author

Pühlhofer, G.

dc.contributor.author

Punch, M.

dc.contributor.author

Quirrenbach, A.

dc.contributor.author

Regeard, M.

dc.contributor.author

Reimer, A.

dc.contributor.author

Reimer, O.

dc.contributor.author

Ren, H.

dc.contributor.author

Reville, B.

dc.contributor.author

Rieger, F.

dc.contributor.author

Rudak, B.

dc.contributor.author

Ruiz-Velasco, E.

dc.contributor.author

Sahakian, V.

dc.contributor.author

Salzmann, H.

dc.contributor.author

Santangelo, A.

dc.contributor.author

Sasaki, M.

dc.contributor.author

Schüssler, F.

dc.contributor.author

Schutte, H. M.

dc.contributor.author

Shapopi, J. N. S.

dc.contributor.author

Sol, H.

dc.contributor.author

Spencer, S.

dc.contributor.author

Stawarz, Łukasz - 132081

dc.contributor.author

Steenkamp, R.

dc.contributor.author

Steinmassl, S.

dc.contributor.author

Steppa, C.

dc.contributor.author

Streil, K.

dc.contributor.author

Takahashi, T.

dc.contributor.author

Tanaka, T.

dc.contributor.author

Taylor, A. M.

dc.contributor.author

Terrier, R.

dc.contributor.author

Tsirou, M.

dc.contributor.author

van Eldik, C.

dc.contributor.author

Venter, C.

dc.contributor.author

Vink, J.

dc.contributor.author

Wach, T.

dc.contributor.author

Wagner, S. J.

dc.contributor.author

Wierzcholska, A.

dc.contributor.author

Zacharias, M.

dc.contributor.author

Zdziarski, A. A.

dc.contributor.author

Zech, A.

dc.contributor.author

Zilberman, P.

dc.contributor.author

Żywucka, N.

dc.contributor.institution

H.E.S.S. Collaboration

dc.date.accessioned

2024-10-09T08:05:51Z

dc.date.available

2024-10-09T08:05:51Z

dc.date.issued

2024

dc.date.openaccess

0

dc.description.accesstime

w momencie opublikowania

dc.description.physical

A96

dc.description.version

ostateczna wersja wydawcy

dc.description.volume

685

dc.identifier.doi

10.1051/0004-6361/202348913

dc.identifier.eissn

1432-0746

dc.identifier.issn

0004-6361

dc.identifier.uri

https://ruj.uj.edu.pl/handle/item/450974

dc.language

eng

dc.language.container

eng

dc.rights

Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa

dc.rights.licence

CC-BY

dc.rights.uri

http://creativecommons.org/licenses/by/4.0/legalcode.pl

dc.share.type

otwarte czasopismo

dc.subject.en

astroparticle physics

dc.subject.en

galaxies: active

dc.subject.en

galaxies: jets

dc.subject.en

gamma rays: galaxies

dc.subject.en

infrared: general

dc.subtype

Article

dc.title

Curvature in the very-high energy gamma-ray spectrum of M 87

dc.title.journal

Astronomy and Astrophysics

dc.type

JournalArticle

dspace.entity.typeen

Publication

Affiliations

Wydział Fizyki, Astronomii i Informatyki Stosowanej

Jamrozy, Marek

Stawarz, Łukasz

No affiliation

Aharonian, F.

Ait Benkhali, F.

Aschersleben, J.

Ashkar, H.

Backes, M.

Barbosa Martins, V.

Batzofin, R.

Becherini, Y.

Berge, D.

Bernlöhr, K.

Böttcher, M.

Boisson, C.

Bolmont, J.

de Bony de Lavergne, M.

Bradascio, F.

Brose, R.

Brun, F.

Bruno, B.

Bulik, T.

Burger-Scheidlin, C.

Bylund, T.

Casanova, S.

Cecil, R.

Celic, J.

Cerruti, M.

Chand, T.

Chandra, S.

Chen, A.

Chibueze, J.

Chibueze, O.

Collins, T.

Cotter, G.

Damascene Mbarubucyeye, J.

Djannati-Ataï, A.

Djuvsland, J.

Dmytriiev, A.

Egberts, K.

Einecke, S.

Fegan, S.

Fontaine, G.

Funk, S.

Gabici, S.

Glicenstein, J. F.

Glombitza, J.

Grolleron, G.

Haerer, L.

Hofmann, W.

Holch, T. L.

Holler, M.

Horns, D.

Jankowsky, F.

Joshi, V.

Jung-Richardt, I.

Kasai, E.

Katarzyński, K.

Khatoon, R.

Khélifi, B.

Kluźniak, W.

Komin, Nu.

Kosack, K.

Kostunin, D.

Kundu, A.

Lang, R. G.

Le Stum, S.

Leitl, F.

Lemière, A.

Lemoine-Goumard, M.

Lenain, J.-P.

Lypova, I.

Luashvili, A.

Mackey, J.

Malyshev, D.

Martí-Devesa, G.

Marx, R.

Mehta, A.

Meyer, M.

Mitchell, A.

Moderski, R.

Moghadam, M. O.

Mohrmann, L.

Montanari, A.

Moulin, E.

Murach, T.

de Naurois, M.

Niemiec, J.

Ohm, S.

Olivera-Nieto, L.

de Ona Wilhelmi, E.

Panny, S.

Panter, M.

Parsons, R. D.

Pensec, U.

Pita, S.

Pühlhofer, G.

Punch, M.

Quirrenbach, A.

Regeard, M.

Reimer, A.

Reimer, O.

Ren, H.

Reville, B.

Rieger, F.

Rudak, B.

Ruiz-Velasco, E.

Sahakian, V.

Salzmann, H.

Santangelo, A.

Sasaki, M.

Schüssler, F.

Schutte, H. M.

Shapopi, J. N. S.

Sol, H.

Spencer, S.

Steenkamp, R.

Steinmassl, S.

Steppa, C.

Streil, K.

Takahashi, T.

Tanaka, T.

Taylor, A. M.

Terrier, R.

Tsirou, M.

van Eldik, C.

Venter, C.

Vink, J.

Wach, T.

Wagner, S. J.

Wierzcholska, A.

Zacharias, M.

Zdziarski, A. A.

Zech, A.

Zilberman, P.

Żywucka, N.

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