MAGIC observations of the giant radio galaxy M 87 in a low-emission state between 2005 and 2007

J. Aleksić; E. A. Alvarez; L. A. Antonelli; P. Antoranz; M. Asensio; M. Backes; J. A. Barrio; D. Bastieri; J. Becerra González; W. Bednarek; A. Berdyugin; K. Berger; E. Bernardini; A. Biland; O. Blanch; R. K. Bock; A. Boller; G. Bonnoli; D. Borla Tridon; I. Braun; T. Bretz; A. Cañellas; E. Carmona; A. Carosi; P. Colin; E. Colombo; J. L. Contreras; J. Cortina; L. Cossio; S. Covino; F. Dazzi; A. De Angelis; G. De Caneva; E. De Cea Del Pozo; B. De Lotto; C. Delgado Mendez; A. Diago Ortega; M. Doert; A. Domínguez; D. Dominis Prester; D. Dorner; M. Doro; D. Elsaesser; D. Ferenc; M. V. Fonseca; L. Font; C. Fruck; R. J. García López; M. Garczarczyk; D. Garrido; M. Gaug; G. Giavitto; N. Godinović; D. Hadasch; D. Häfner; A. Herrero; D. Hildebrand; D. Höhne-Mönch; J. Hose; D. Hrupec; B. Huber; T. Jogler; H. Kellermann; S. Klepser; T. Krähenbühl; J. Krause; A. La Barbera; D. Lelas; E. Leonardo; E. Lindfors; S. Lombardi; M. López; A. López-Oramas; E. Lorenz; M. Makariev; G. Maneva; N. Mankuzhiyil; K. Mannheim; L. Maraschi; M. Mariotti; M. Martínez; D. Mazin; M. Meucci; J. M. Miranda; R. Mirzoyan; H. Miyamoto; J. Moldón; A. Moralejo; P. Munar-Adrover; D. Nieto; K. Nilsson; R. Orito; I. Oya; D. Paneque; R. Paoletti; S. Pardo; J. M. Paredes; S. Partini; M. Pasanen; F. Pauss

doi:10.1051/0004-6361/201117827

MAGIC observations of the giant radio galaxy M 87 in a low-emission state between 2005 and 2007

J. Aleksić, E. A. Alvarez, L. A. Antonelli, P. Antoranz, M. Asensio, M. Backes, J. A. Barrio, D. Bastieri, J. Becerra González, W. Bednarek, A. Berdyugin, K. Berger, E. Bernardini, A. Biland, O. Blanch, R. K. Bock, A. Boller, G. Bonnoli, D. Borla Tridon, I. BraunT. Bretz, A. Cañellas, E. Carmona, A. Carosi, P. Colin, E. Colombo, J. L. Contreras, J. Cortina, L. Cossio, S. Covino, F. Dazzi, A. De Angelis, G. De Caneva, E. De Cea Del Pozo, B. De Lotto, C. Delgado Mendez, A. Diago Ortega, M. Doert, A. Domínguez, D. Dominis Prester, D. Dorner, M. Doro, D. Elsaesser, D. Ferenc, M. V. Fonseca, L. Font, C. Fruck, R. J. García López, M. Garczarczyk, D. Garrido, M. Gaug, G. Giavitto, N. Godinović, D. Hadasch, D. Häfner, A. Herrero, D. Hildebrand, D. Höhne-Mönch, J. Hose, D. Hrupec, B. Huber, T. Jogler, H. Kellermann, S. Klepser, T. Krähenbühl, J. Krause, A. La Barbera, D. Lelas, E. Leonardo, E. Lindfors, S. Lombardi, M. López, A. López-Oramas, E. Lorenz, M. Makariev, G. Maneva, N. Mankuzhiyil, K. Mannheim, L. Maraschi, M. Mariotti, M. Martínez, D. Mazin, M. Meucci, J. M. Miranda, R. Mirzoyan, H. Miyamoto, J. Moldón, A. Moralejo, P. Munar-Adrover, D. Nieto, K. Nilsson, R. Orito, I. Oya, D. Paneque, R. Paoletti, S. Pardo, J. M. Paredes, S. Partini, M. Pasanen, F. Pauss

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Abstract

Context. We present the results of a long M 87 monitoring campaign in very high energy γ-rays with the MAGIC-I Cherenkov telescope. Aims. We aim to model the persistent non-thermal jet emission by monitoring and characterizing the very high energy γ-ray emission of M 87 during a low state. Methods. A total of 150 h of data were taken between 2005 and 2007 with the single MAGIC-I telescope, out of which 128.6 h survived the data quality selection. We also collected data in the X-ray and Fermi-LAT bands from the literature (partially contemporaneous). Results. No flaring activity was found during the campaign. The source was found to be in a persistent low-emission state, which was at a confidence level of 7σ. We present the spectrum between 100 GeV and 2 TeV, which is consistent with a simple power law with a photon index Γ = 2.21 ± 0.21 and a flux normalization at 300 GeV of (7.7 ± 1.3) × 10-8 TeV-1 s-1 m-2. The extrapolation of the MAGIC spectrum into the GeV energy range matches the previously published Fermi-LAT spectrum well, covering a combined energy range of four orders of magnitude with the same spectral index. We model the broad band energy spectrum with a spine layer model, which can satisfactorily describe our data. © 2012 ESO.

Original language	English
Article number	A96
Journal	Astronomy and Astrophysics
Volume	544
DOIs	https://doi.org/10.1051/0004-6361/201117827
Publication status	Published - 13 Aug 2012

Keywords

Galaxies: individual: M 87
Gamma rays: galaxies

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10.1051/0004-6361/201117827

Cite this

Aleksić, J., Alvarez, E. A., Antonelli, L. A., Antoranz, P., Asensio, M., Backes, M., Barrio, J. A., Bastieri, D., Becerra González, J., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Borla Tridon, D., ... Pauss, F. (2012). MAGIC observations of the giant radio galaxy M 87 in a low-emission state between 2005 and 2007. Astronomy and Astrophysics, 544, [A96]. https://doi.org/10.1051/0004-6361/201117827

@article{d83cf7fe35e44351b82c620c235a2650,

title = "MAGIC observations of the giant radio galaxy M 87 in a low-emission state between 2005 and 2007",

abstract = "Context. We present the results of a long M 87 monitoring campaign in very high energy γ-rays with the MAGIC-I Cherenkov telescope. Aims. We aim to model the persistent non-thermal jet emission by monitoring and characterizing the very high energy γ-ray emission of M 87 during a low state. Methods. A total of 150 h of data were taken between 2005 and 2007 with the single MAGIC-I telescope, out of which 128.6 h survived the data quality selection. We also collected data in the X-ray and Fermi-LAT bands from the literature (partially contemporaneous). Results. No flaring activity was found during the campaign. The source was found to be in a persistent low-emission state, which was at a confidence level of 7σ. We present the spectrum between 100 GeV and 2 TeV, which is consistent with a simple power law with a photon index Γ = 2.21 ± 0.21 and a flux normalization at 300 GeV of (7.7 ± 1.3) × 10-8 TeV-1 s-1 m-2. The extrapolation of the MAGIC spectrum into the GeV energy range matches the previously published Fermi-LAT spectrum well, covering a combined energy range of four orders of magnitude with the same spectral index. We model the broad band energy spectrum with a spine layer model, which can satisfactorily describe our data. {\textcopyright} 2012 ESO.",

keywords = "Galaxies: individual: M 87, Gamma rays: galaxies",

author = "J. Aleksi{\'c} and Alvarez, {E. A.} and Antonelli, {L. A.} and P. Antoranz and M. Asensio and M. Backes and Barrio, {J. A.} and D. Bastieri and {Becerra Gonz{\'a}lez}, J. and W. Bednarek and A. Berdyugin and K. Berger and E. Bernardini and A. Biland and O. Blanch and Bock, {R. K.} and A. Boller and G. Bonnoli and {Borla Tridon}, D. and I. Braun and T. Bretz and A. Ca{\~n}ellas and E. Carmona and A. Carosi and P. Colin and E. Colombo and Contreras, {J. L.} and J. Cortina and L. Cossio and S. Covino and F. Dazzi and {De Angelis}, A. and {De Caneva}, G. and {De Cea Del Pozo}, E. and {De Lotto}, B. and {Delgado Mendez}, C. and {Diago Ortega}, A. and M. Doert and A. Dom{\'i}nguez and {Dominis Prester}, D. and D. Dorner and M. Doro and D. Elsaesser and D. Ferenc and Fonseca, {M. V.} and L. Font and C. Fruck and {Garc{\'i}a L{\'o}pez}, {R. J.} and M. Garczarczyk and D. Garrido and M. Gaug and G. Giavitto and N. Godinovi{\'c} and D. Hadasch and D. H{\"a}fner and A. Herrero and D. Hildebrand and D. H{\"o}hne-M{\"o}nch and J. Hose and D. Hrupec and B. Huber and T. Jogler and H. Kellermann and S. Klepser and T. Kr{\"a}henb{\"u}hl and J. Krause and {La Barbera}, A. and D. Lelas and E. Leonardo and E. Lindfors and S. Lombardi and M. L{\'o}pez and A. L{\'o}pez-Oramas and E. Lorenz and M. Makariev and G. Maneva and N. Mankuzhiyil and K. Mannheim and L. Maraschi and M. Mariotti and M. Mart{\'i}nez and D. Mazin and M. Meucci and Miranda, {J. M.} and R. Mirzoyan and H. Miyamoto and J. Mold{\'o}n and A. Moralejo and P. Munar-Adrover and D. Nieto and K. Nilsson and R. Orito and I. Oya and D. Paneque and R. Paoletti and S. Pardo and Paredes, {J. M.} and S. Partini and M. Pasanen and F. Pauss",

year = "2012",

month = aug,

day = "13",

doi = "10.1051/0004-6361/201117827",

language = "English",

volume = "544",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

}

Aleksić, J, Alvarez, EA, Antonelli, LA, Antoranz, P, Asensio, M, Backes, M, Barrio, JA, Bastieri, D, Becerra González, J, Bednarek, W, Berdyugin, A, Berger, K, Bernardini, E, Biland, A, Blanch, O, Bock, RK, Boller, A, Bonnoli, G, Borla Tridon, D, Braun, I, Bretz, T, Cañellas, A, Carmona, E, Carosi, A, Colin, P, Colombo, E, Contreras, JL, Cortina, J, Cossio, L, Covino, S, Dazzi, F, De Angelis, A, De Caneva, G, De Cea Del Pozo, E, De Lotto, B, Delgado Mendez, C, Diago Ortega, A, Doert, M, Domínguez, A, Dominis Prester, D, Dorner, D, Doro, M, Elsaesser, D, Ferenc, D, Fonseca, MV, Font, L, Fruck, C, García López, RJ, Garczarczyk, M, Garrido, D, Gaug, M, Giavitto, G, Godinović, N, Hadasch, D, Häfner, D, Herrero, A, Hildebrand, D, Höhne-Mönch, D, Hose, J, Hrupec, D, Huber, B, Jogler, T, Kellermann, H, Klepser, S, Krähenbühl, T, Krause, J, La Barbera, A, Lelas, D, Leonardo, E, Lindfors, E, Lombardi, S, López, M, López-Oramas, A, Lorenz, E, Makariev, M, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, M, Martínez, M, Mazin, D, Meucci, M, Miranda, JM, Mirzoyan, R, Miyamoto, H, Moldón, J, Moralejo, A, Munar-Adrover, P, Nieto, D, Nilsson, K, Orito, R, Oya, I, Paneque, D, Paoletti, R, Pardo, S, Paredes, JM, Partini, S, Pasanen, M & Pauss, F 2012, 'MAGIC observations of the giant radio galaxy M 87 in a low-emission state between 2005 and 2007', Astronomy and Astrophysics, vol. 544, A96. https://doi.org/10.1051/0004-6361/201117827

TY - JOUR

T1 - MAGIC observations of the giant radio galaxy M 87 in a low-emission state between 2005 and 2007

AU - Aleksić, J.

AU - Alvarez, E. A.

AU - Antonelli, L. A.

AU - Antoranz, P.

AU - Asensio, M.

AU - Backes, M.

AU - Barrio, J. A.

AU - Bastieri, D.

AU - Becerra González, J.

AU - Bednarek, W.

AU - Berdyugin, A.

AU - Berger, K.

AU - Bernardini, E.

AU - Biland, A.

AU - Blanch, O.

AU - Bock, R. K.

AU - Boller, A.

AU - Bonnoli, G.

AU - Borla Tridon, D.

AU - Braun, I.

AU - Bretz, T.

AU - Cañellas, A.

AU - Carmona, E.

AU - Carosi, A.

AU - Colin, P.

AU - Colombo, E.

AU - Contreras, J. L.

AU - Cortina, J.

AU - Cossio, L.

AU - Covino, S.

AU - Dazzi, F.

AU - De Angelis, A.

AU - De Caneva, G.

AU - De Cea Del Pozo, E.

AU - De Lotto, B.

AU - Delgado Mendez, C.

AU - Diago Ortega, A.

AU - Doert, M.

AU - Domínguez, A.

AU - Dominis Prester, D.

AU - Dorner, D.

AU - Doro, M.

AU - Elsaesser, D.

AU - Ferenc, D.

AU - Fonseca, M. V.

AU - Font, L.

AU - Fruck, C.

AU - García López, R. J.

AU - Garczarczyk, M.

AU - Garrido, D.

AU - Gaug, M.

AU - Giavitto, G.

AU - Godinović, N.

AU - Hadasch, D.

AU - Häfner, D.

AU - Herrero, A.

AU - Hildebrand, D.

AU - Höhne-Mönch, D.

AU - Hose, J.

AU - Hrupec, D.

AU - Huber, B.

AU - Jogler, T.

AU - Kellermann, H.

AU - Klepser, S.

AU - Krähenbühl, T.

AU - Krause, J.

AU - La Barbera, A.

AU - Lelas, D.

AU - Leonardo, E.

AU - Lindfors, E.

AU - Lombardi, S.

AU - López, M.

AU - López-Oramas, A.

AU - Lorenz, E.

AU - Makariev, M.

AU - Maneva, G.

AU - Mankuzhiyil, N.

AU - Mannheim, K.

AU - Maraschi, L.

AU - Mariotti, M.

AU - Martínez, M.

AU - Mazin, D.

AU - Meucci, M.

AU - Miranda, J. M.

AU - Mirzoyan, R.

AU - Miyamoto, H.

AU - Moldón, J.

AU - Moralejo, A.

AU - Munar-Adrover, P.

AU - Nieto, D.

AU - Nilsson, K.

AU - Orito, R.

AU - Oya, I.

AU - Paneque, D.

AU - Paoletti, R.

AU - Pardo, S.

AU - Paredes, J. M.

AU - Partini, S.

AU - Pasanen, M.

AU - Pauss, F.

PY - 2012/8/13

Y1 - 2012/8/13

N2 - Context. We present the results of a long M 87 monitoring campaign in very high energy γ-rays with the MAGIC-I Cherenkov telescope. Aims. We aim to model the persistent non-thermal jet emission by monitoring and characterizing the very high energy γ-ray emission of M 87 during a low state. Methods. A total of 150 h of data were taken between 2005 and 2007 with the single MAGIC-I telescope, out of which 128.6 h survived the data quality selection. We also collected data in the X-ray and Fermi-LAT bands from the literature (partially contemporaneous). Results. No flaring activity was found during the campaign. The source was found to be in a persistent low-emission state, which was at a confidence level of 7σ. We present the spectrum between 100 GeV and 2 TeV, which is consistent with a simple power law with a photon index Γ = 2.21 ± 0.21 and a flux normalization at 300 GeV of (7.7 ± 1.3) × 10-8 TeV-1 s-1 m-2. The extrapolation of the MAGIC spectrum into the GeV energy range matches the previously published Fermi-LAT spectrum well, covering a combined energy range of four orders of magnitude with the same spectral index. We model the broad band energy spectrum with a spine layer model, which can satisfactorily describe our data. © 2012 ESO.

AB - Context. We present the results of a long M 87 monitoring campaign in very high energy γ-rays with the MAGIC-I Cherenkov telescope. Aims. We aim to model the persistent non-thermal jet emission by monitoring and characterizing the very high energy γ-ray emission of M 87 during a low state. Methods. A total of 150 h of data were taken between 2005 and 2007 with the single MAGIC-I telescope, out of which 128.6 h survived the data quality selection. We also collected data in the X-ray and Fermi-LAT bands from the literature (partially contemporaneous). Results. No flaring activity was found during the campaign. The source was found to be in a persistent low-emission state, which was at a confidence level of 7σ. We present the spectrum between 100 GeV and 2 TeV, which is consistent with a simple power law with a photon index Γ = 2.21 ± 0.21 and a flux normalization at 300 GeV of (7.7 ± 1.3) × 10-8 TeV-1 s-1 m-2. The extrapolation of the MAGIC spectrum into the GeV energy range matches the previously published Fermi-LAT spectrum well, covering a combined energy range of four orders of magnitude with the same spectral index. We model the broad band energy spectrum with a spine layer model, which can satisfactorily describe our data. © 2012 ESO.

KW - Galaxies: individual: M 87

KW - Gamma rays: galaxies

U2 - 10.1051/0004-6361/201117827

DO - 10.1051/0004-6361/201117827

M3 - Article

VL - 544

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A96

ER -

MAGIC observations of the giant radio galaxy M 87 in a low-emission state between 2005 and 2007

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Keywords

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