Simultaneous multi-frequency observation of the unknown redshift blazar PG 1553+113 in March-April 2008

J. Aleksić; H. Anderhub; L. A. Antonelli; P. Antoranz; M. Backes; C. Baixeras; S. Balestra; J. A. Barrio; D. Bastieri; J. Becerra González; J. K. Becker; W. Bednarek; A. Berdyugin; K. Berger; E. Bernardini; A. Biland; R. K. Bock; G. Bonnoli; P. Bordas; D. Borla Tridon; V. Bosch-Ramon; D. Bose; I. Braun; T. Bretz; D. Britzger; M. Camara; E. Carmona; A. Carosi; P. Colin; S. Commichau; J. L. Contreras; J. Cortina; M. T. Costado; S. Covino; F. Dazzi; A. De Angelis; E. de Cea del Pozo; R. De los Reyes; B. De Lotto; M. De Maria; F. De Sabata; C. Delgado Mendez; A. Domínguez; D. Dominis Prester; D. Dorner; M. Doro; D. Elsaesser; M. Errando; D. Ferenc; E. Fernández; R. Firpo; M. V. Fonseca; L. Font; N. Galante; R. J. García López; M. Garczarczyk; M. Gaug; N. Godinovic; F. Goebel; D. Hadasch; A. Herrero; D. Hildebrand; D. Höhne-Mönch; J. Hose; D. Hrupec; C. C. Hsu; T. Jogler; S. Klepser; T. Krähenbühl; D. Kranich; A. La Barbera; A. Laille; E. Leonardo; E. Lindfors; S. Lombardi; F. Longo; M. López; E. Lorenz; P. Majumdar; 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; M. Moles; A. Moralejo; D. Nieto; K. Nilsson; J. Ninkovic; R. Orito; I. Oya; R. Paoletti; J. M. Paredes; M. Pasanen; D. Pascoli; F. Pauss; R. G. Pegna; M. A. Perez-Torres; M. Persic; L. Peruzzo; F. Prada; E. Prandini; N. Puchades; I. Puljak; I. Reichardt; W. Rhode; M. Ribó; J. Rico; M. Rissi; S. Rügamer; A. Saggion; T. Y. Saito; M. Salvati; M. Sánchez-Conde; K. Satalecka; V. Scalzotto; V. Scapin; T. Schweizer; M. Shayduk; S. N. Shore; A. Sierpowska-Bartosik; A. Sillanpää; J. Sitarek; D. Sobczynska; F. Spanier; S. Spiro; A. Stamerra; B. Steinke; N. Strah; J. C. Struebig; T. Suric; L. Takalo; F. Tavecchio; P. Temnikov; D. Tescaro; M. Teshima; D. F. Torres; N. Turini; H. Vankov; R. M. Wagner; V. Zabalza; F. Zandanel; R. Zanin; J. Zapatero; E. Pian; V. Bianchin; F. D'Ammando; G. Di Cocco; D. Fugazza; G. Ghisellini; O. M. Kurtanidze; C. M. Raiteri; G. Tosti; A. Treves; S. Vercellone; M. Villata

doi:10.1051/0004-6361/200913607

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Volume 515 (June 2010)

A&A, 515 (2010) A76

Abstract

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Issue		A&A Volume 515, June 2010


Article Number		A76
Number of page(s)		5
Section		Extragalactic astronomy
DOI		https://doi.org/10.1051/0004-6361/200913607
Published online		11 June 2010

A&A 515, A76 (2010)

Simultaneous multi-frequency observation of the unknown redshift blazar PG 1553+113 in March-April 2008

J. Aleksić¹, H. Anderhub², L. A. Antonelli³, P. Antoranz⁴, M. Backes⁵, C. Baixeras⁶, S. Balestra⁴, J. A. Barrio⁴, D. Bastieri⁷, J. Becerra González⁸, J. K. Becker⁵, W. Bednarek⁹, A. Berdyugin¹⁰, K. Berger⁹, E. Bernardini¹¹, A. Biland², R. K. Bock¹²^,7, G. Bonnoli¹³, P. Bordas¹⁴, D. Borla Tridon¹², V. Bosch-Ramon¹⁴, D. Bose⁴, I. Braun², T. Bretz¹⁵, D. Britzger¹², M. Camara⁴, E. Carmona¹², A. Carosi³, P. Colin¹², S. Commichau², J. L. Contreras⁴, J. Cortina¹, M. T. Costado⁸^,16, S. Covino³, F. Dazzi¹⁷^,18, A. De Angelis¹⁷, E. de Cea del Pozo¹⁹, R. De los Reyes⁴^,20, B. De Lotto¹⁷, M. De Maria¹⁷, F. De Sabata¹⁷, C. Delgado Mendez⁸^,21, A. Domínguez²², D. Dominis Prester²³, D. Dorner², M. Doro⁷, D. Elsaesser¹⁵, M. Errando¹, D. Ferenc²⁴, E. Fernández¹, R. Firpo¹, M. V. Fonseca⁴, L. Font⁶, N. Galante¹², R. J. García López⁸^,16, M. Garczarczyk¹, M. Gaug⁸, N. Godinovic²³, F. Goebel¹²^,25, D. Hadasch¹⁹, A. Herrero⁸^,16, D. Hildebrand², D. Höhne-Mönch¹⁵, J. Hose¹², D. Hrupec²³, C. C. Hsu¹², T. Jogler¹², S. Klepser¹, T. Krähenbühl², D. Kranich², A. La Barbera³, A. Laille²⁴, E. Leonardo¹³, E. Lindfors¹⁰, S. Lombardi⁷, F. Longo¹⁷, M. López⁷, E. Lorenz²^,12, P. Majumdar¹¹, G. Maneva²⁶, N. Mankuzhiyil¹⁷, K. Mannheim¹⁵, L. Maraschi³, M. Mariotti⁷, M. Martínez¹, D. Mazin¹, M. Meucci¹³, J. M. Miranda⁴, R. Mirzoyan¹², H. Miyamoto¹², J. Moldón¹⁴, M. Moles²², A. Moralejo¹, D. Nieto⁴, K. Nilsson¹⁰, J. Ninkovic¹², R. Orito¹², I. Oya⁴, R. Paoletti¹³, J. M. Paredes¹⁴, M. Pasanen¹⁰, D. Pascoli⁷, F. Pauss², R. G. Pegna¹³, M. A. Perez-Torres²², M. Persic¹⁷^,27, L. Peruzzo⁷, F. Prada²², E. Prandini⁷, N. Puchades¹, I. Puljak²³, I. Reichardt¹, W. Rhode⁵, M. Ribó¹⁴, J. Rico²⁸^,1, M. Rissi², S. Rügamer¹⁵, A. Saggion⁷, T. Y. Saito¹², M. Salvati³, M. Sánchez-Conde²², K. Satalecka¹¹, V. Scalzotto⁷, V. Scapin¹⁷, T. Schweizer¹², M. Shayduk¹², S. N. Shore²⁹, A. Sierpowska-Bartosik⁹, A. Sillanpää¹⁰, J. Sitarek¹²^,9, D. Sobczynska⁹, F. Spanier¹⁵, S. Spiro³, A. Stamerra¹³, B. Steinke¹², N. Strah⁵, J. C. Struebig¹⁵, T. Suric²³, L. Takalo¹⁰, F. Tavecchio³, P. Temnikov²⁶, D. Tescaro¹, M. Teshima¹², D. F. Torres²⁸^,19, N. Turini¹³, H. Vankov²⁶, R. M. Wagner¹², V. Zabalza¹⁴, F. Zandanel²², R. Zanin¹, J. Zapatero⁶, The MAGIC Collaboration , E. Pian³⁰^,31, V. Bianchin³², F. D'Ammando³³, G. Di Cocco³², D. Fugazza³⁴, G. Ghisellini³⁴, O. M. Kurtanidze³⁵, C. M. Raiteri³⁶, G. Tosti³⁷, A. Treves³⁸, S. Vercellone³⁹ and M. Villata³⁶

¹ IFAE, Edifici Cn., Campus UAB, 08193 Bellaterra, Spain e-mail: nijil.mankuzhiyil@uniud.it
² ETH Zurich, 8093 Switzerland
³ INAF National Institute for Astrophysics, 00136 Rome, Italy
⁴ Universidad Complutense, 28040 Madrid, Spain
⁵ Technische Universität Dortmund, 44221 Dortmund, Germany
⁶ Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
⁷ Università di Padova and INFN, 35131 Padova, Italy
⁸ Inst. de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain
⁹ University of Łódź, 90236 Lodz, Poland
¹⁰ Tuorla Observatory, University of Turku, 21500 Piikkiö, Finland
¹¹ Deutsches Elektronen-Synchrotron (DESY), 15738 Zeuthen, Germany
¹² Max-Planck-Institut für Physik, 80805 München, Germany
¹³ Università di Siena, and INFN Pisa, 53100 Siena, Italy
¹⁴ Universitat de Barcelona (ICC/IEEC), 08028 Barcelona, Spain
¹⁵ Universität Würzburg, 97074 Würzburg, Germany
¹⁶ Depto. de Astrofisica, Universidad, 38206 La Laguna, Tenerife, Spain
¹⁷ Università di Udine, and INFN Trieste, 33100 Udine, Italy
¹⁸ Supported by INFN Padova
¹⁹ Institut de Ciències de l'Espai (IEEC-CSIC), 08193 Bellaterra, Spain
²⁰ Now at: Max-Planck-Institut für Kernphysik, 69029 Heidelberg, Germany
²¹ Now at: Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
²² Inst. de Astrofísica de Andalucía (CSIC), 18080 Granada, Spain
²³ Croatian MAGIC Consortium, Institute R. Boskovic, University of Rijeka and University of Split, 10000 Zagreb, Croatia
²⁴ University of California, Davis, CA-95616-8677, USA
²⁵ Deceased
²⁶ Inst. for Nucl. Research and Nucl. Energy, 1784 Sofia, Bulgaria
²⁷ INAF/Osservatorio Astronomico and INFN, 34143 Trieste, Italy
²⁸ ICREA, 08010 Barcelona, Spain
²⁹ Università di Pisa, and INFN Pisa, 56126 Pisa, Italy
³⁰ INAF, Trieste Astronomical Observatory, 34143 Trieste, Italy
³¹ Now at: Scuola Normale Superiore, 56126 Pisa, Italy
³² INAF/IASF-Bologna, 40129 Bologna, Italy
³³ INAF/IASF-Roma, 00133 Roma, Italy
³⁴ INAF, Astronomical Obs. Brera, 23807 Merate, Italy
³⁵ Abastumani Astrophysical Observatory, 383762 Abastumani, Georgia
³⁶ INAF, Astronomical Obs. Torino, 10025 Torino, Italy
³⁷ University of Perugia, 06123 Perugia, Italy
³⁸ University of Insubria, 22100 Como, Italy
³⁹ INAF, IASF-Milano, 20133 Milano, Italy

Received: 4 November 2009
Accepted: 3 March 2010

Abstract

The blazar PG 1553+113 is a well known TeV γ-ray emitter. In this paper we determine its spectral energy distribution through simultaneous multi-frequency data to study its emission processes. An extensive campaign was carried out between March and April 2008, where optical, X-ray, high-energy (HE) γ-ray, and very-high-energy (VHE) γ-ray data were obtained with the KVA, Abastumani, REM, RossiXTE/ASM, AGILE and MAGIC telescopes, respectively. We combine the data to derive the source's spectral energy distribution and interpret its double-peaked shape within the framework of a synchrotron self-Compton model.

Key words: BL Lacertae objects: individual: PG 1553+113 / X-rays: galaxies / gamma rays: galaxies / galaxies: active

© ESO, 2010

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