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

Delgado J; Torres-Alba N; Dazzi F; Hrupec D; Mirzoyan R; Chai Y; Miranda JM; Minev M; Saito T; Will M; Martinez M; Dorner D; Iwamura Y; Elsaesser D; Lopez RJG; Godinovic N; Vanzo G; Micanovic S; Palatiello M; Tavecchio F; Makariev M; Delfino M; Maneva G; de Almeida UB; D'Elia V; Bhattacharyya W; Niedzwiecki A; Biland A; Fruck C; Di Pierro F; Gallozzi S; Colombo E; Moreno V; Somero A; Puljak I; Blanch O; Noda K; Hassan T; Paoletti R; Nilsson K; Banerjee B; Paiano S; Mariotti M; Inoue S; Guberman D; Ramazani VF; Da Vela P; Mallamaci M; Molina E; Gasparyan S; Penil P; Moralejo A; Rico J; Babic A; Morcuende D; Covino S; Ceribella G; Contreras JL; Engels AA; Font L; Fernandez-Barral A; Acosta MV; Prester DD; Herrera J; Moroni PGP; Vovk I; Foffano L; Hoang J; Maraschi L; Cikota S; Dominguez A; Rugliancich A; Garczarczyk M; Nogues L; Longo F; Nothe M; Zaric D; Galindo D; Majumdar P; De Angelis A; Neustroev V; Bednarek W; Carosi R; Rhode W; Teshima M; Nishijima K; Bellizzi L; Barrio JA; Miceli D; Gaug M; Lombardi S; Suric T; Hadasch D; Colak M; Schweizer T; Tsujimoto S; Lopez-Oramas A; Lelas D; Fonseca MV; Antonelli LA; Fattorini A; Besenrieder J; Snidaric I; Saha L; Ishio K; Doro M; Persic M; Acciari VA; Righi C; Prandini E; Masuda S; Fraga BMD; Espineira ED; Lamastra A; Peresano M; Lopez M; Ribo M; Berti A; Bigongiari C; Ninci D; Bonnoli G; Temnikov P; Baack D; Rosillo MN; Stamerra A; Lindfors E; Colin U; Paneque D; Terzic T; Sahakyan N; Nigro C; Fidalgo D; Moretti E; Gonzalez JB; Busetto G; Manganaro M; Ferrara G; Mannheim K; Ansoldi S; van Scherpenberg J; Lopez-Coto R; Cortina J; Satalecka K; Sobczynska D; Bernardini E; Mazin D; Green D; Munar-Adrover P; Kubo H; Maggio C; Palacio J; Kushida J; Strzys M; Paredes JM; Hahn A; De Lotto B; Strom D; Leone F; Sitarek J

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

Delgado J
Torres-Alba N
Dazzi F
Hrupec D
Mirzoyan R
Chai Y
Miranda JM
Minev M
Saito T
Will M
Martinez M
Dorner D
Iwamura Y
Elsaesser D
Lopez RJG
Godinovic N
Vanzo G
Micanovic S
Palatiello M
Tavecchio F
Makariev M
Delfino M
Maneva G
de Almeida UB
D'Elia V
Bhattacharyya W
Niedzwiecki A
Biland A
Fruck C
Di Pierro F
Gallozzi S
Colombo E
Moreno V
Somero A
Puljak I
Blanch O
Noda K
Hassan T
Paoletti R
Nilsson K
Banerjee B
Paiano S
Mariotti M
Inoue S
Guberman D
Ramazani VF
Da Vela P
Mallamaci M
Molina E
Gasparyan S
Penil P
Moralejo A
Rico J
Babic A
Morcuende D
Covino S
Ceribella G
Contreras JL
Engels AA
Font L
Fernandez-Barral A
Acosta MV
Prester DD
Herrera J
Moroni PGP
Vovk I
Foffano L
Hoang J
Maraschi L
Cikota S
Dominguez A
Rugliancich A
Garczarczyk M
Nogues L
Longo F
Nothe M
Zaric D
Galindo D
Majumdar P
De Angelis A
Neustroev V
Bednarek W
Carosi R
Rhode W
Teshima M
Nishijima K
Bellizzi L
Barrio JA
Miceli D
Gaug M
Lombardi S
Suric T
Hadasch D
Colak M
Schweizer T
Tsujimoto S
Lopez-Oramas A
Lelas D
Fonseca MV
Antonelli LA
Fattorini A
Besenrieder J
Snidaric I
Saha L
Ishio K
Doro M
Persic M
Acciari VA
Righi C
Prandini E
Masuda S
Fraga BMD
Espineira ED
Lamastra A
Peresano M
Lopez M
Ribo M
Berti A
Bigongiari C
Ninci D
Bonnoli G
Temnikov P
Baack D
Rosillo MN
Stamerra A
Lindfors E
Colin U
Paneque D
Terzic T
Sahakyan N
Nigro C
Fidalgo D
Moretti E
Gonzalez JB
Busetto G
Manganaro M
Ferrara G
Mannheim K
Ansoldi S
van Scherpenberg J
Lopez-Coto R
Cortina J
Satalecka K
Sobczynska D
Bernardini E
Mazin D
Green D
Munar-Adrover P
Kubo H
Maggio C
Palacio J
Kushida J
Strzys M
Paredes JM
Hahn A
De Lotto B
Strom D
Leone F
Sitarek J
Katso/Avaa
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OXFORD UNIV PRESS
doi:10.1093/mnras/stz943
URI
https://academic.oup.com/mnras/article/486/3/4233/5427920
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Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042822503
Tiivistelmä
We present a measurement of the extragalactic background light (EBL) based on a joint likelihood analysis of 32 gamma-ray spectra for 12 blazars in the redshift range z = 0.03-0.944, obtained by the MAGIC telescopes and Fermi-LAT. The EBL is the part of the diffuse extragalactic radiation spanning the ultraviolet, visible, and infrared bands. Major contributors to the EBL are the light emitted by stars through the history of the Universe, and the fraction of it that was absorbed by dust in galaxies and re-emitted at longer wavelengths. The EBL can be studied indirectly through its effect on very high energy photons that are emitted by cosmic sources and absorbed via gamma gamma interactions during their propagation across cosmological distances. We obtain estimates of the EBL density in good agreement with state-of-the-art models of the EBL production and evolution. The 1 sigma upper bounds, including systematic uncertainties, are between 13 per cent and 23 per cent above the nominal EBL density in the models. No anomaly in the expected transparency of the Universe to gamma-rays is observed in any range of optical depth. We also perform a wavelength-resolved EBL determination, which results in a hint of an excess of EBL in the 0.18-0.62 mu m range relative to the studied models, yet compatible with them within systematics.
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