Discovery of very high energy γ-ray emission from the blazar 1ES 0033+595 by the MAGIC telescopes

The number of known very high energy (VHE) blazars is ∼50, which is very small in comparison to the number of blazars detected in other frequencies. This situation is a handicap for population studies of blazars, which emit about half of their luminosity in the γ-ray domain. Moreover, VHE blazars, i...

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Veröffentlicht in:Monthly Notices of the Royal Astronomical Society 2015-01, Vol.446 (1), p.217-225
Hauptverfasser: Aleksić, J, Ansoldi, S, Babic, A, Bangale, P, de Almeida, U. Barres, Barrio, J. A, Bednarek, W, Berger, K, Biland, A, Bonnefoy, S, Bonnoli, G, Borracci, F, Carmona, E, Carosi, A, Colombo, E, Cortina, J, Covino, S, Da Vela, P, Dazzi, F, De Angelis, A, De Caneva, G, De Lotto, B, Mendez, C. Delgado, Prester, D. Dominis, Doro, M, Einecke, S, Eisenacher, D, Elsaesser, D, Ferenc, D, Fonseca, M. V, Fruck, C, López, R. J. García, Godinović, N, Hayashida, M, Herrero, A, Hose, J, Hrupec, D, Idec, W, Kadenius, V, Kellermann, H, Kodani, K, Kubo, H, Kushida, J, Barbera, A. La, Lelas, D, Lewandowska, N, López, M, López-Coto, R, Lozano, I, Makariev, M, Maneva, G, Mankuzhiyil, N, Maraschi, L, Marcote, B, Mariotti, M, Martínez, M, Menzel, U, Meucci, M, Mirzoyan, R, Moralejo, A, Munar-Adrover, P, Niedzwiecki, A, Nishijima, K, Noda, K, Nowak, N, Overkemping, A, Paiano, S, Palatiello, M, Paneque, D, Paoletti, R, Paredes, J. M, Paredes-Fortuny, X, Prada, F, Moroni, P. G. Prada, Prandini, E, Puljak, I, Reinthal, R, Ribó, M, Saggion, A, Satalecka, K, Scalzotto, V, Schultz, C, Shore, S. N, Sillanpää, A, Sitarek, J, Sobczynska, D, Spanier, F, Stamerra, A, Storz, J, Takalo, L, Takami, H, Tavecchio, F, Tibolla, O, Torres, D. F, Toyama, T, Wagner, R. M, Zanin, R, collaboration), (MAGIC, Buson, S, Borghese, A
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container_title Monthly Notices of the Royal Astronomical Society
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creator Aleksić, J
Ansoldi, S
Babic, A
Bangale, P
de Almeida, U. Barres
Barrio, J. A
Bednarek, W
Berger, K
Biland, A
Bonnefoy, S
Bonnoli, G
Borracci, F
Carmona, E
Carosi, A
Colombo, E
Cortina, J
Covino, S
Da Vela, P
Dazzi, F
De Angelis, A
De Caneva, G
De Lotto, B
Mendez, C. Delgado
Prester, D. Dominis
Doro, M
Einecke, S
Eisenacher, D
Elsaesser, D
Ferenc, D
Fonseca, M. V
Fruck, C
López, R. J. García
Godinović, N
Hayashida, M
Herrero, A
Hose, J
Hrupec, D
Idec, W
Kadenius, V
Kellermann, H
Kodani, K
Kubo, H
Kushida, J
Barbera, A. La
Lelas, D
Lewandowska, N
López, M
López-Coto, R
Lozano, I
Makariev, M
Maneva, G
Mankuzhiyil, N
Maraschi, L
Marcote, B
Mariotti, M
Martínez, M
Menzel, U
Meucci, M
Mirzoyan, R
Moralejo, A
Munar-Adrover, P
Niedzwiecki, A
Nishijima, K
Noda, K
Nowak, N
Overkemping, A
Paiano, S
Palatiello, M
Paneque, D
Paoletti, R
Paredes, J. M
Paredes-Fortuny, X
Prada, F
Moroni, P. G. Prada
Prandini, E
Puljak, I
Reinthal, R
Ribó, M
Saggion, A
Satalecka, K
Scalzotto, V
Schultz, C
Shore, S. N
Sillanpää, A
Sitarek, J
Sobczynska, D
Spanier, F
Stamerra, A
Storz, J
Takalo, L
Takami, H
Tavecchio, F
Tibolla, O
Torres, D. F
Toyama, T
Wagner, R. M
Zanin, R
collaboration), (MAGIC
Buson, S
Borghese, A
description The number of known very high energy (VHE) blazars is ∼50, which is very small in comparison to the number of blazars detected in other frequencies. This situation is a handicap for population studies of blazars, which emit about half of their luminosity in the γ-ray domain. Moreover, VHE blazars, if distant, allow for the study of the environment that the high-energy γ-rays traverse in their path towards the Earth, like the extragalactic background light (EBL) and the intergalactic magnetic field (IGMF), and hence they have a special interest for the astrophysics community. We present the first VHE detection of 1ES 0033+595 with a statistical significance of 5.5σ. The VHE emission of this object is constant throughout the MAGIC observations (2009 August and October), and can be parametrized with a power law with an integral flux above 150 GeV of (7.1 ± 1.3) × 10−12 photons cm−2 s−1 and a photon index of (3.8 ± 0.7). We model its spectral energy distribution (SED) as the result of inverse Compton scattering of synchrotron photons. For the study of the SED, we used simultaneous optical R-band data from the KVA telescope, archival X-ray data by Swift as well as INTEGRAL, and simultaneous high-energy (HE, 300 MeV–10 GeV) γ-ray data from the Fermi Large Area Telescope (LAT) observatory. Using the empirical approach of Prandini et al. (2010) and the Fermi LAT and MAGIC spectra for this object, we estimate the redshift of this source to be 0.34 ± 0.08 ± 0.05. This is a relevant result because this source is possibly one of the 10 most distant VHE blazars known to date, and with further (simultaneous) observations could play an important role in blazar population studies, as well as future constraints on the EBL and IGMF.
doi_str_mv 10.1093/mnras/stu2024
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Barres ; Barrio, J. A ; Bednarek, W ; Berger, K ; Biland, A ; Bonnefoy, S ; Bonnoli, G ; Borracci, F ; Carmona, E ; Carosi, A ; Colombo, E ; Cortina, J ; Covino, S ; Da Vela, P ; Dazzi, F ; De Angelis, A ; De Caneva, G ; De Lotto, B ; Mendez, C. Delgado ; Prester, D. Dominis ; Doro, M ; Einecke, S ; Eisenacher, D ; Elsaesser, D ; Ferenc, D ; Fonseca, M. V ; Fruck, C ; López, R. J. García ; Godinović, N ; Hayashida, M ; Herrero, A ; Hose, J ; Hrupec, D ; Idec, W ; Kadenius, V ; Kellermann, H ; Kodani, K ; Kubo, H ; Kushida, J ; Barbera, A. La ; Lelas, D ; Lewandowska, N ; López, M ; López-Coto, R ; Lozano, I ; Makariev, M ; Maneva, G ; Mankuzhiyil, N ; Maraschi, L ; Marcote, B ; Mariotti, M ; Martínez, M ; Menzel, U ; Meucci, M ; Mirzoyan, R ; Moralejo, A ; Munar-Adrover, P ; Niedzwiecki, A ; Nishijima, K ; Noda, K ; Nowak, N ; Overkemping, A ; Paiano, S ; Palatiello, M ; Paneque, D ; Paoletti, R ; Paredes, J. M ; Paredes-Fortuny, X ; Prada, F ; Moroni, P. G. Prada ; Prandini, E ; Puljak, I ; Reinthal, R ; Ribó, M ; Saggion, A ; Satalecka, K ; Scalzotto, V ; Schultz, C ; Shore, S. N ; Sillanpää, A ; Sitarek, J ; Sobczynska, D ; Spanier, F ; Stamerra, A ; Storz, J ; Takalo, L ; Takami, H ; Tavecchio, F ; Tibolla, O ; Torres, D. F ; Toyama, T ; Wagner, R. M ; Zanin, R ; collaboration), (MAGIC ; Buson, S ; Borghese, A</creator><creatorcontrib>Aleksić, J ; Ansoldi, S ; Babic, A ; Bangale, P ; de Almeida, U. Barres ; Barrio, J. A ; Bednarek, W ; Berger, K ; Biland, A ; Bonnefoy, S ; Bonnoli, G ; Borracci, F ; Carmona, E ; Carosi, A ; Colombo, E ; Cortina, J ; Covino, S ; Da Vela, P ; Dazzi, F ; De Angelis, A ; De Caneva, G ; De Lotto, B ; Mendez, C. Delgado ; Prester, D. Dominis ; Doro, M ; Einecke, S ; Eisenacher, D ; Elsaesser, D ; Ferenc, D ; Fonseca, M. V ; Fruck, C ; López, R. J. García ; Godinović, N ; Hayashida, M ; Herrero, A ; Hose, J ; Hrupec, D ; Idec, W ; Kadenius, V ; Kellermann, H ; Kodani, K ; Kubo, H ; Kushida, J ; Barbera, A. La ; Lelas, D ; Lewandowska, N ; López, M ; López-Coto, R ; Lozano, I ; Makariev, M ; Maneva, G ; Mankuzhiyil, N ; Maraschi, L ; Marcote, B ; Mariotti, M ; Martínez, M ; Menzel, U ; Meucci, M ; Mirzoyan, R ; Moralejo, A ; Munar-Adrover, P ; Niedzwiecki, A ; Nishijima, K ; Noda, K ; Nowak, N ; Overkemping, A ; Paiano, S ; Palatiello, M ; Paneque, D ; Paoletti, R ; Paredes, J. M ; Paredes-Fortuny, X ; Prada, F ; Moroni, P. G. Prada ; Prandini, E ; Puljak, I ; Reinthal, R ; Ribó, M ; Saggion, A ; Satalecka, K ; Scalzotto, V ; Schultz, C ; Shore, S. N ; Sillanpää, A ; Sitarek, J ; Sobczynska, D ; Spanier, F ; Stamerra, A ; Storz, J ; Takalo, L ; Takami, H ; Tavecchio, F ; Tibolla, O ; Torres, D. F ; Toyama, T ; Wagner, R. M ; Zanin, R ; collaboration), (MAGIC ; Buson, S ; Borghese, A</creatorcontrib><description>The number of known very high energy (VHE) blazars is ∼50, which is very small in comparison to the number of blazars detected in other frequencies. This situation is a handicap for population studies of blazars, which emit about half of their luminosity in the γ-ray domain. Moreover, VHE blazars, if distant, allow for the study of the environment that the high-energy γ-rays traverse in their path towards the Earth, like the extragalactic background light (EBL) and the intergalactic magnetic field (IGMF), and hence they have a special interest for the astrophysics community. We present the first VHE detection of 1ES 0033+595 with a statistical significance of 5.5σ. The VHE emission of this object is constant throughout the MAGIC observations (2009 August and October), and can be parametrized with a power law with an integral flux above 150 GeV of (7.1 ± 1.3) × 10−12 photons cm−2 s−1 and a photon index of (3.8 ± 0.7). We model its spectral energy distribution (SED) as the result of inverse Compton scattering of synchrotron photons. For the study of the SED, we used simultaneous optical R-band data from the KVA telescope, archival X-ray data by Swift as well as INTEGRAL, and simultaneous high-energy (HE, 300 MeV–10 GeV) γ-ray data from the Fermi Large Area Telescope (LAT) observatory. Using the empirical approach of Prandini et al. (2010) and the Fermi LAT and MAGIC spectra for this object, we estimate the redshift of this source to be 0.34 ± 0.08 ± 0.05. 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La</creatorcontrib><creatorcontrib>Lelas, D</creatorcontrib><creatorcontrib>Lewandowska, N</creatorcontrib><creatorcontrib>López, M</creatorcontrib><creatorcontrib>López-Coto, R</creatorcontrib><creatorcontrib>Lozano, I</creatorcontrib><creatorcontrib>Makariev, M</creatorcontrib><creatorcontrib>Maneva, G</creatorcontrib><creatorcontrib>Mankuzhiyil, N</creatorcontrib><creatorcontrib>Maraschi, L</creatorcontrib><creatorcontrib>Marcote, B</creatorcontrib><creatorcontrib>Mariotti, M</creatorcontrib><creatorcontrib>Martínez, M</creatorcontrib><creatorcontrib>Menzel, U</creatorcontrib><creatorcontrib>Meucci, M</creatorcontrib><creatorcontrib>Mirzoyan, R</creatorcontrib><creatorcontrib>Moralejo, A</creatorcontrib><creatorcontrib>Munar-Adrover, P</creatorcontrib><creatorcontrib>Niedzwiecki, A</creatorcontrib><creatorcontrib>Nishijima, K</creatorcontrib><creatorcontrib>Noda, K</creatorcontrib><creatorcontrib>Nowak, N</creatorcontrib><creatorcontrib>Overkemping, A</creatorcontrib><creatorcontrib>Paiano, S</creatorcontrib><creatorcontrib>Palatiello, M</creatorcontrib><creatorcontrib>Paneque, D</creatorcontrib><creatorcontrib>Paoletti, R</creatorcontrib><creatorcontrib>Paredes, J. M</creatorcontrib><creatorcontrib>Paredes-Fortuny, X</creatorcontrib><creatorcontrib>Prada, F</creatorcontrib><creatorcontrib>Moroni, P. G. Prada</creatorcontrib><creatorcontrib>Prandini, E</creatorcontrib><creatorcontrib>Puljak, I</creatorcontrib><creatorcontrib>Reinthal, R</creatorcontrib><creatorcontrib>Ribó, M</creatorcontrib><creatorcontrib>Saggion, A</creatorcontrib><creatorcontrib>Satalecka, K</creatorcontrib><creatorcontrib>Scalzotto, V</creatorcontrib><creatorcontrib>Schultz, C</creatorcontrib><creatorcontrib>Shore, S. N</creatorcontrib><creatorcontrib>Sillanpää, A</creatorcontrib><creatorcontrib>Sitarek, J</creatorcontrib><creatorcontrib>Sobczynska, D</creatorcontrib><creatorcontrib>Spanier, F</creatorcontrib><creatorcontrib>Stamerra, A</creatorcontrib><creatorcontrib>Storz, J</creatorcontrib><creatorcontrib>Takalo, L</creatorcontrib><creatorcontrib>Takami, H</creatorcontrib><creatorcontrib>Tavecchio, F</creatorcontrib><creatorcontrib>Tibolla, O</creatorcontrib><creatorcontrib>Torres, D. F</creatorcontrib><creatorcontrib>Toyama, T</creatorcontrib><creatorcontrib>Wagner, R. M</creatorcontrib><creatorcontrib>Zanin, R</creatorcontrib><creatorcontrib>collaboration), (MAGIC</creatorcontrib><creatorcontrib>Buson, S</creatorcontrib><creatorcontrib>Borghese, A</creatorcontrib><title>Discovery of very high energy γ-ray emission from the blazar 1ES 0033+595 by the MAGIC telescopes</title><title>Monthly Notices of the Royal Astronomical Society</title><addtitle>Mon. Not. R. Astron. Soc</addtitle><description>The number of known very high energy (VHE) blazars is ∼50, which is very small in comparison to the number of blazars detected in other frequencies. This situation is a handicap for population studies of blazars, which emit about half of their luminosity in the γ-ray domain. Moreover, VHE blazars, if distant, allow for the study of the environment that the high-energy γ-rays traverse in their path towards the Earth, like the extragalactic background light (EBL) and the intergalactic magnetic field (IGMF), and hence they have a special interest for the astrophysics community. We present the first VHE detection of 1ES 0033+595 with a statistical significance of 5.5σ. The VHE emission of this object is constant throughout the MAGIC observations (2009 August and October), and can be parametrized with a power law with an integral flux above 150 GeV of (7.1 ± 1.3) × 10−12 photons cm−2 s−1 and a photon index of (3.8 ± 0.7). We model its spectral energy distribution (SED) as the result of inverse Compton scattering of synchrotron photons. For the study of the SED, we used simultaneous optical R-band data from the KVA telescope, archival X-ray data by Swift as well as INTEGRAL, and simultaneous high-energy (HE, 300 MeV–10 GeV) γ-ray data from the Fermi Large Area Telescope (LAT) observatory. Using the empirical approach of Prandini et al. (2010) and the Fermi LAT and MAGIC spectra for this object, we estimate the redshift of this source to be 0.34 ± 0.08 ± 0.05. This is a relevant result because this source is possibly one of the 10 most distant VHE blazars known to date, and with further (simultaneous) observations could play an important role in blazar population studies, as well as future constraints on the EBL and IGMF.</description><subject>Blazars</subject><subject>Constants</subject><subject>Emission</subject><subject>Integrals</subject><subject>Photons</subject><subject>Spectral energy distribution</subject><subject>Symbols</subject><subject>Telescopes</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqNkL1OwzAURi0EEqUwsntEQqF2bN_EY1XKj1TEAMyR7ThtUBIHO0UKT8M78AY8AM9EWioxwvQN9-jo6iB0SskFJZJN6sarMAndOiYx30MjykBEsQTYRyNCmIjShNJDdBTCMyGEsxhGyFyWwbhX63vsCrzdVblcYdtYv-zx10fkVY9tXYZQugYX3tW4W1msK_WmPKbzh8_3wc3OhRRY99vb3fT6doY7W9lB3dpwjA4KVQV7stsxerqaP85uosX9AE4XkWGJ6KKUGtACgGqeCsYZGKKZUCmnOjeEshQMmNjwRMSggZo4F5yK3EoNMbGQszE6-_G23r2sbeiy4W1jq0o11q1DRgFkKiRN5X9QwklC5AaNflDjXQjeFlnry1r5PqMk23TPtt2zXfdftVu3f6Df2TGEQQ</recordid><startdate>20150101</startdate><enddate>20150101</enddate><creator>Aleksić, J</creator><creator>Ansoldi, S</creator><creator>Babic, A</creator><creator>Bangale, P</creator><creator>de Almeida, U. 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M</creator><creator>Zanin, R</creator><creator>collaboration), (MAGIC</creator><creator>Buson, S</creator><creator>Borghese, A</creator><general>Oxford University Press</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20150101</creationdate><title>Discovery of very high energy γ-ray emission from the blazar 1ES 0033+595 by the MAGIC telescopes</title><author>Aleksić, J ; Ansoldi, S ; Babic, A ; Bangale, P ; de Almeida, U. Barres ; Barrio, J. A ; Bednarek, W ; Berger, K ; Biland, A ; Bonnefoy, S ; Bonnoli, G ; Borracci, F ; Carmona, E ; Carosi, A ; Colombo, E ; Cortina, J ; Covino, S ; Da Vela, P ; Dazzi, F ; De Angelis, A ; De Caneva, G ; De Lotto, B ; Mendez, C. Delgado ; Prester, D. Dominis ; Doro, M ; Einecke, S ; Eisenacher, D ; Elsaesser, D ; Ferenc, D ; Fonseca, M. V ; Fruck, C ; López, R. J. García ; Godinović, N ; Hayashida, M ; Herrero, A ; Hose, J ; Hrupec, D ; Idec, W ; Kadenius, V ; Kellermann, H ; Kodani, K ; Kubo, H ; Kushida, J ; Barbera, A. La ; Lelas, D ; Lewandowska, N ; López, M ; López-Coto, R ; Lozano, I ; Makariev, M ; Maneva, G ; Mankuzhiyil, N ; Maraschi, L ; Marcote, B ; Mariotti, M ; Martínez, M ; Menzel, U ; Meucci, M ; Mirzoyan, R ; Moralejo, A ; Munar-Adrover, P ; Niedzwiecki, A ; Nishijima, K ; Noda, K ; Nowak, N ; Overkemping, A ; Paiano, S ; Palatiello, M ; Paneque, D ; Paoletti, R ; Paredes, J. M ; Paredes-Fortuny, X ; Prada, F ; Moroni, P. G. Prada ; Prandini, E ; Puljak, I ; Reinthal, R ; Ribó, M ; Saggion, A ; Satalecka, K ; Scalzotto, V ; Schultz, C ; Shore, S. N ; Sillanpää, A ; Sitarek, J ; Sobczynska, D ; Spanier, F ; Stamerra, A ; Storz, J ; Takalo, L ; Takami, H ; Tavecchio, F ; Tibolla, O ; Torres, D. F ; Toyama, T ; Wagner, R. M ; Zanin, R ; collaboration), (MAGIC ; Buson, S ; Borghese, A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c375t-81c6b5661b4853436c0b35a841bdc01386c6c2c47526b61c2d5415de9b620e6d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Blazars</topic><topic>Constants</topic><topic>Emission</topic><topic>Integrals</topic><topic>Photons</topic><topic>Spectral energy distribution</topic><topic>Symbols</topic><topic>Telescopes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Aleksić, J</creatorcontrib><creatorcontrib>Ansoldi, S</creatorcontrib><creatorcontrib>Babic, A</creatorcontrib><creatorcontrib>Bangale, P</creatorcontrib><creatorcontrib>de Almeida, U. Barres</creatorcontrib><creatorcontrib>Barrio, J. 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M</creatorcontrib><creatorcontrib>Zanin, R</creatorcontrib><creatorcontrib>collaboration), (MAGIC</creatorcontrib><creatorcontrib>Buson, S</creatorcontrib><creatorcontrib>Borghese, A</creatorcontrib><collection>CrossRef</collection><collection>Meteorological &amp; Geoastrophysical Abstracts</collection><collection>Meteorological &amp; Geoastrophysical Abstracts - Academic</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Monthly Notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Aleksić, J</au><au>Ansoldi, S</au><au>Babic, A</au><au>Bangale, P</au><au>de Almeida, U. Barres</au><au>Barrio, J. A</au><au>Bednarek, W</au><au>Berger, K</au><au>Biland, A</au><au>Bonnefoy, S</au><au>Bonnoli, G</au><au>Borracci, F</au><au>Carmona, E</au><au>Carosi, A</au><au>Colombo, E</au><au>Cortina, J</au><au>Covino, S</au><au>Da Vela, P</au><au>Dazzi, F</au><au>De Angelis, A</au><au>De Caneva, G</au><au>De Lotto, B</au><au>Mendez, C. Delgado</au><au>Prester, D. Dominis</au><au>Doro, M</au><au>Einecke, S</au><au>Eisenacher, D</au><au>Elsaesser, D</au><au>Ferenc, D</au><au>Fonseca, M. V</au><au>Fruck, C</au><au>López, R. J. García</au><au>Godinović, N</au><au>Hayashida, M</au><au>Herrero, A</au><au>Hose, J</au><au>Hrupec, D</au><au>Idec, W</au><au>Kadenius, V</au><au>Kellermann, H</au><au>Kodani, K</au><au>Kubo, H</au><au>Kushida, J</au><au>Barbera, A. La</au><au>Lelas, D</au><au>Lewandowska, N</au><au>López, M</au><au>López-Coto, R</au><au>Lozano, I</au><au>Makariev, M</au><au>Maneva, G</au><au>Mankuzhiyil, N</au><au>Maraschi, L</au><au>Marcote, B</au><au>Mariotti, M</au><au>Martínez, M</au><au>Menzel, U</au><au>Meucci, M</au><au>Mirzoyan, R</au><au>Moralejo, A</au><au>Munar-Adrover, P</au><au>Niedzwiecki, A</au><au>Nishijima, K</au><au>Noda, K</au><au>Nowak, N</au><au>Overkemping, A</au><au>Paiano, S</au><au>Palatiello, M</au><au>Paneque, D</au><au>Paoletti, R</au><au>Paredes, J. M</au><au>Paredes-Fortuny, X</au><au>Prada, F</au><au>Moroni, P. G. Prada</au><au>Prandini, E</au><au>Puljak, I</au><au>Reinthal, R</au><au>Ribó, M</au><au>Saggion, A</au><au>Satalecka, K</au><au>Scalzotto, V</au><au>Schultz, C</au><au>Shore, S. N</au><au>Sillanpää, A</au><au>Sitarek, J</au><au>Sobczynska, D</au><au>Spanier, F</au><au>Stamerra, A</au><au>Storz, J</au><au>Takalo, L</au><au>Takami, H</au><au>Tavecchio, F</au><au>Tibolla, O</au><au>Torres, D. F</au><au>Toyama, T</au><au>Wagner, R. M</au><au>Zanin, R</au><au>collaboration), (MAGIC</au><au>Buson, S</au><au>Borghese, A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Discovery of very high energy γ-ray emission from the blazar 1ES 0033+595 by the MAGIC telescopes</atitle><jtitle>Monthly Notices of the Royal Astronomical Society</jtitle><stitle>Mon. Not. R. Astron. Soc</stitle><date>2015-01-01</date><risdate>2015</risdate><volume>446</volume><issue>1</issue><spage>217</spage><epage>225</epage><pages>217-225</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>The number of known very high energy (VHE) blazars is ∼50, which is very small in comparison to the number of blazars detected in other frequencies. This situation is a handicap for population studies of blazars, which emit about half of their luminosity in the γ-ray domain. Moreover, VHE blazars, if distant, allow for the study of the environment that the high-energy γ-rays traverse in their path towards the Earth, like the extragalactic background light (EBL) and the intergalactic magnetic field (IGMF), and hence they have a special interest for the astrophysics community. We present the first VHE detection of 1ES 0033+595 with a statistical significance of 5.5σ. The VHE emission of this object is constant throughout the MAGIC observations (2009 August and October), and can be parametrized with a power law with an integral flux above 150 GeV of (7.1 ± 1.3) × 10−12 photons cm−2 s−1 and a photon index of (3.8 ± 0.7). We model its spectral energy distribution (SED) as the result of inverse Compton scattering of synchrotron photons. For the study of the SED, we used simultaneous optical R-band data from the KVA telescope, archival X-ray data by Swift as well as INTEGRAL, and simultaneous high-energy (HE, 300 MeV–10 GeV) γ-ray data from the Fermi Large Area Telescope (LAT) observatory. Using the empirical approach of Prandini et al. (2010) and the Fermi LAT and MAGIC spectra for this object, we estimate the redshift of this source to be 0.34 ± 0.08 ± 0.05. This is a relevant result because this source is possibly one of the 10 most distant VHE blazars known to date, and with further (simultaneous) observations could play an important role in blazar population studies, as well as future constraints on the EBL and IGMF.</abstract><pub>Oxford University Press</pub><doi>10.1093/mnras/stu2024</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record>
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subjects Blazars
Constants
Emission
Integrals
Photons
Spectral energy distribution
Symbols
Telescopes
title Discovery of very high energy γ-ray emission from the blazar 1ES 0033+595 by the MAGIC telescopes
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