PG 1553+113: Five years of observations with magic

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. Cãellas; 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; 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; M. A. Perez-Torres

doi:10.1088/0004-637X/748/1/46

PG 1553+113: Five years of observations with magic

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. Cãellas, 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, 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, M. A. Perez-Torres

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Abstract

We present the results of five years (2005-2009) of MAGIC observations of the BL Lac object PG 1553+113 at very high energies (VHEs; E > 100GeV). Power-law fits of the individual years are compatible with a steady mean photon index Γ = 4.27 ± 0.14. In the last three years of data, the flux level above 150GeV shows a clear variability (probability of constant flux < 0.001%). The flux variations are modest, lying in the range from 4% to 11% of the Crab Nebula flux. Simultaneous optical data also show only modest variability that seems to be correlated with VHE gamma-ray variability. We also performed a temporal analysis of (all available) simultaneous Fermi/Large Area Telescope data of PG 1553+113 above 1GeV, which reveals hints of variability in the 2008-2009 sample. Finally, we present a combination of the mean spectrum measured at VHEs with archival data available for other wavelengths. The mean spectral energy distribution can be modeled with a one-zone synchrotron self-Compton model, which gives the main physical parameters governing the VHE emission in the blazar jet. © 2012 The American Astronomical Society. All rights reserved.

Original language	English
Article number	46
Journal	Astrophysical Journal
Volume	748
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/748/1/46
Publication status	Published - 20 Mar 2012

Keywords

gamma rays: galaxies
radiation mechanisms: non-thermal

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10.1088/0004-637X/748/1/46

Cite this

Aleksić, J., Alvarez, E. A., Antonelli, L. A., Antoranz, P., Asensio, M., Backes, M., Barrio, J. A., Bastieri, D., González, J. B., Bednarek, W., Berdyugin, A., Berger, K., Bernardini, E., Biland, A., Blanch, O., Bock, R. K., Boller, A., Bonnoli, G., Tridon, D. B., ... Perez-Torres, M. A. (2012). PG 1553+113: Five years of observations with magic. Astrophysical Journal, 748(1), [46]. https://doi.org/10.1088/0004-637X/748/1/46

@article{e98273ffb1f64037b5870fc942379b33,

title = "PG 1553+113: Five years of observations with magic",

abstract = "We present the results of five years (2005-2009) of MAGIC observations of the BL Lac object PG 1553+113 at very high energies (VHEs; E > 100GeV). Power-law fits of the individual years are compatible with a steady mean photon index Γ = 4.27 ± 0.14. In the last three years of data, the flux level above 150GeV shows a clear variability (probability of constant flux < 0.001%). The flux variations are modest, lying in the range from 4% to 11% of the Crab Nebula flux. Simultaneous optical data also show only modest variability that seems to be correlated with VHE gamma-ray variability. We also performed a temporal analysis of (all available) simultaneous Fermi/Large Area Telescope data of PG 1553+113 above 1GeV, which reveals hints of variability in the 2008-2009 sample. Finally, we present a combination of the mean spectrum measured at VHEs with archival data available for other wavelengths. The mean spectral energy distribution can be modeled with a one-zone synchrotron self-Compton model, which gives the main physical parameters governing the VHE emission in the blazar jet. {\textcopyright} 2012 The American Astronomical Society. All rights reserved.",

keywords = "gamma rays: galaxies, radiation mechanisms: non-thermal",

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 Gonz{\'a}lez, {J. Becerra} 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 Tridon, {D. Borla} and I. Braun and T. Bretz and A. C{\~a}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 Ortega, {A. Diago} and M. Doert and A. Dom{\'i}nguez and Prester, {D. Dominis} and D. Dorner and M. Doro and D. Elsaesser and D. Ferenc and Fonseca, {M. V.} and L. Font and C. Fruck and L{\'o}pez, {R. J.Garc{\'i}a} and M. Garczarczyk and D. Garrido 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 and Perez-Torres, {M. A.}",

year = "2012",

month = mar,

day = "20",

doi = "10.1088/0004-637X/748/1/46",

language = "English",

volume = "748",

journal = "Astrophysical Journal",

issn = "0004-637X",

number = "1",

}

Aleksić, J, Alvarez, EA, Antonelli, LA, Antoranz, P, Asensio, M, Backes, M, Barrio, JA, Bastieri, D, González, JB, Bednarek, W, Berdyugin, A, Berger, K, Bernardini, E, Biland, A, Blanch, O, Bock, RK, Boller, A, Bonnoli, G, Tridon, DB, Braun, I, Bretz, T, Cãellas, 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, Ortega, AD, Doert, M, Domínguez, A, Prester, DD, Dorner, D, Doro, M, Elsaesser, D, Ferenc, D, Fonseca, MV, Font, L, Fruck, C, López, RJG, Garczarczyk, M, Garrido, D, 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 & Perez-Torres, MA 2012, 'PG 1553+113: Five years of observations with magic', Astrophysical Journal, vol. 748, no. 1, 46. https://doi.org/10.1088/0004-637X/748/1/46

TY - JOUR

T1 - PG 1553+113: Five years of observations with magic

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 - González, J. Becerra

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 - Tridon, D. Borla

AU - Braun, I.

AU - Bretz, T.

AU - Cãellas, 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 - Ortega, A. Diago

AU - Doert, M.

AU - Domínguez, A.

AU - Prester, D. Dominis

AU - Dorner, D.

AU - Doro, M.

AU - Elsaesser, D.

AU - Ferenc, D.

AU - Fonseca, M. V.

AU - Font, L.

AU - Fruck, C.

AU - López, R. J.García

AU - Garczarczyk, M.

AU - Garrido, D.

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.

AU - Perez-Torres, M. A.

PY - 2012/3/20

Y1 - 2012/3/20

N2 - We present the results of five years (2005-2009) of MAGIC observations of the BL Lac object PG 1553+113 at very high energies (VHEs; E > 100GeV). Power-law fits of the individual years are compatible with a steady mean photon index Γ = 4.27 ± 0.14. In the last three years of data, the flux level above 150GeV shows a clear variability (probability of constant flux < 0.001%). The flux variations are modest, lying in the range from 4% to 11% of the Crab Nebula flux. Simultaneous optical data also show only modest variability that seems to be correlated with VHE gamma-ray variability. We also performed a temporal analysis of (all available) simultaneous Fermi/Large Area Telescope data of PG 1553+113 above 1GeV, which reveals hints of variability in the 2008-2009 sample. Finally, we present a combination of the mean spectrum measured at VHEs with archival data available for other wavelengths. The mean spectral energy distribution can be modeled with a one-zone synchrotron self-Compton model, which gives the main physical parameters governing the VHE emission in the blazar jet. © 2012 The American Astronomical Society. All rights reserved.

AB - We present the results of five years (2005-2009) of MAGIC observations of the BL Lac object PG 1553+113 at very high energies (VHEs; E > 100GeV). Power-law fits of the individual years are compatible with a steady mean photon index Γ = 4.27 ± 0.14. In the last three years of data, the flux level above 150GeV shows a clear variability (probability of constant flux < 0.001%). The flux variations are modest, lying in the range from 4% to 11% of the Crab Nebula flux. Simultaneous optical data also show only modest variability that seems to be correlated with VHE gamma-ray variability. We also performed a temporal analysis of (all available) simultaneous Fermi/Large Area Telescope data of PG 1553+113 above 1GeV, which reveals hints of variability in the 2008-2009 sample. Finally, we present a combination of the mean spectrum measured at VHEs with archival data available for other wavelengths. The mean spectral energy distribution can be modeled with a one-zone synchrotron self-Compton model, which gives the main physical parameters governing the VHE emission in the blazar jet. © 2012 The American Astronomical Society. All rights reserved.

KW - gamma rays: galaxies

KW - radiation mechanisms: non-thermal

U2 - 10.1088/0004-637X/748/1/46

DO - 10.1088/0004-637X/748/1/46

M3 - Article

VL - 748

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 46

ER -

PG 1553+113: Five years of observations with magic

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