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

MAGIC Collaboration: J. Aleksi\'c (1); H. Anderhub (2); L. A.; Antonelli (3); P. Antoranz (4); M. Backes (5); C. Baixeras (6); S. Balestra; (4); J. A. Barrio (4); D. Bastieri (7); J. Becerra Gonz\'alez (8); J. K.; Becker (5); W. Bednarek (9); A. Berdyugin (10); K. Berger (9); E. Bernardini; (11); A. Biland (2); R. K. Bock (12,7); G. Bonnoli (13); P. Bordas (14); D.; Borla Tridon (12); V. Bosch-Ramon (14); D. Bose (4); I. Braun (2); T. Bretz; (15); D. Britzger (12); M. Camara (4); E. Carmona (12); A. Carosi (3); P.; Colin (12); S. Commichau (2); J. L. Contreras (4); J. Cortina (1); M. T.; Costado (8,16); S. Covino (3); F. Dazzi (17,26); A. De Angelis (17); E. de; Cea del Pozo (18); R. De los Reyes (4,28); B. De Lotto (17); M. De Maria; (17); F. De Sabata (17); C. Delgado Mendez (8,27); A. Dom\'inguez (19); D.; Dominis Prester (20); D. Dorner (2); M. Doro (7); D. Elsaesser (15); M.; Errando (1); D. Ferenc (21); E. Fern\'andez (1); R. Firpo (1); M. V. Fonseca; (4); L. Font (6); N. Galante (12); R. J. Garc\'ia L\'opez (8,16); M.; Garczarczyk (1); M. Gaug (8); N. Godinovic (20); F. Goebel (12,29); D.; Hadasch (18); A. Herrero (8,16); D. Hildebrand (2); D. H\"ohne-M\"onch (15),; J. Hose (12); D. Hrupec (20); C. C. Hsu (12); T. Jogler (12); S. Klepser (1),; T. Kr\"ahenb\"uhl (2); D. Kranich (2); A. La Barbera (3); A. Laille (21); E.; Leonardo (13); E. Lindfors (10); S. Lombardi (7); F. Longo (17); M. L\'opez; (7); E. Lorenz (2,12); P. Majumdar (11); G. Maneva (22); N. Mankuzhiyil (17),; K. Mannheim (15); L. Maraschi (3); M. Mariotti (7); M. Mart\'inez (1); D.; Mazin (1); M. Meucci (13); J. M. Miranda (4); R. Mirzoyan (12); H. Miyamoto; (12); J. Mold\'on (14); M. Moles (19); A. Moralejo (1); D. Nieto (4); K.; Nilsson (10); J. Ninkovic (12); R. Orito (12); I. Oya (4); R. Paoletti (13),; J. M. Paredes (14); M. Pasanen (10); D. Pascoli (7); F. Pauss (2); R. G.; Pegna (13); M. A. Perez-Torres (19); M. Persic (17,23); L. Peruzzo (7); F.; Prada (19); E. Prandini (7); N. Puchades (1); I. Puljak (20); I. Reichardt; (1); W. Rhode (5); M. Rib\'o (14); J. Rico (24,1); M. Rissi (2); S. R\"ugamer; (15); A. Saggion (7); T. Y. Saito (12); M. Salvati (3); M. S\'anchez-Conde; (19); K. Satalecka (11); V. Scalzotto (7); V. Scapin (17); T. Schweizer (12),; M. Shayduk (12); S. N. Shore (25); A. Sierpowska-Bartosik (9); A.; Sillanp\"a\"a (10); J. Sitarek (12,9); D. Sobczynska (9); F. Spanier (15); S.; Spiro (3); A. Stamerra (13); B. Steinke (12); N. Strah (5); J. C. Struebig; (15); T. Suric (20); L. Takalo (10); F. Tavecchio (3); P. Temnikov (22); D.; Tescaro (1); M. Teshima (12); D. F. Torres (24,18); N. Turini (13); H. Vankov; (22); R. M. Wagner (12); V. Zabalza (14); F. Zandanel (19); R. Zanin (1); J.; Zapatero (6); and E. Pian (33,39); V. Bianchin (30); F. D'Ammando (31); G. Di; Cocco (30); D. Fugazza (32); G. Ghisellini (32); O. M. Kurtanidze (38); C. M.; Raiteri (34); G. Tosti (35); A. Treves (36); S. Vercellone (37); M. Villata; (34) ((1) IFAE; Edifici Cn.; Campus UAB; E-08193 Bellaterra; Spain; (2) ETH; Zurich; CH-8093 Switzerland; (3) INAF National Institute for Astrophysics,; I-00136 Rome; Italy; (4) Universidad Complutense; E-28040 Madrid; Spain; (5); Technische Universit\"at Dortmund; D-44221 Dortmund; Germany; (6) Universitat; Aut\`onoma de Barcelona; E-08193 Bellaterra; Spain; (7) Universit\`a di; Padova; INFN; I-35131 Padova; Italy; (8) Inst. de Astrof\'isica de; Canarias; E-38200 La Laguna; Tenerife; Spain; (9) University of \L\'od\'z,; PL-90236 Lodz; Poland; (10) Tuorla Observatory; University of Turku; FI-21500; Piikki\"o; Finland; (11) Deutsches Elektronen-Synchrotron (DESY); D-15738; Zeuthen; Germany; (12) Max-Planck-Institut f\"ur Physik; D-80805 M\"unchen,; Germany; (13) Universit\`a di Siena; and INFN Pisa; I-53100 Siena; Italy,; (14) Universitat de Barcelona (ICC/IEEC); E-08028 Barcelona; Spain; (15); Universit\"at W\"urzburg; D-97074 W\"urzburg; Germany; (16) Depto. de; Astrofisica; Universidad; E-38206 La Laguna; Tenerife; Spain; (17); Universit\`a di Udine; and INFN Trieste; I-33100 Udine; Italy; (18) Institut; de Ci\`encies de l'Espai (IEEC-CSIC); E-08193 Bellaterra; Spain; (19) Inst.; de Astrof\'isica de Andaluc\'ia (CSIC); E-18080 Granada; Spain; (20) Croatian; MAGIC Consortium; Institute R. Boskovic; University of Rijeka; University; of Split; HR-10000 Zagreb; Croatia; (21) University of California; Davis,; CA-95616-8677; USA; (22) Inst. for Nucl. Research; Nucl. Energy; BG-1784; Sofia; Bulgaria; (23) INAF/Osservatorio Astronomico; INFN; I-34143; Trieste; Italy; (24) ICREA; E-08010 Barcelona; Spain; (25) Universit\`a di; Pisa; and INFN Pisa; I-56126 Pisa; Italy; (26) supported by INFN Padova; (27); now at: Centro de Investigaciones Energ\'eticas; Medioambientales y; Tecnol\'ogicas (CIEMAT); Madrid; Spain; (28) now at: Max-Planck-Institut; f\"ur Kernphysik; D-69029 Heidelberg; Germany; (29) deceased; (30); INAF/IASF-Bologna; I-40129 Bologna; Italy; (31) INAF/IASF-Roma; I-00133 Roma,; Italy; (32) INAF; Astronomical Obs. Brera; I-23807 Merate; Italy; (33) INAF,; Trieste Astronomical Observatory; I-34143 Trieste; Italy; (34) INAF,; Astronomical Obs. Torino; I-10025 Torino; Italy; (35) University of Perugia,; I-06123 Perugia; Italy; (36) University of Insubria; I-22100 Como; Italy,; (37) INAF; IASF-Milano; I-20133 Milano; Italy; (38) Abastumani Astrophysical; Observatory; 383762 Abastumani; Georgia; (39) now at: Scuola Normale; Superiore; I-56126 Pisa; Italy)

arXiv:0911.1088·astro-ph.HE·August 14, 2016

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

MAGIC Collaboration: J. Aleksi\'c (1), H. Anderhub (2), L. A., Antonelli (3), P. Antoranz (4), M. Backes (5), C. Baixeras (6), S. Balestra, (4), J. A. Barrio (4), D. Bastieri (7), J. Becerra Gonz\'alez (8), J. K., Becker (5), W. Bednarek (9), A. Berdyugin (10), K. Berger (9)

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TL;DR

This study presents the first simultaneous broad-band gamma-ray observation of the blazar PG 1553+113, combining multi-frequency data to analyze its spectral energy distribution and emission mechanisms.

Contribution

It provides a comprehensive multi-wavelength dataset and interprets the spectral energy distribution within a synchrotron self-Compton model, advancing understanding of blazar emission.

Findings

01

First simultaneous broad-band gamma-ray data for PG 1553+113

02

Spectral energy distribution consistent with synchrotron self-Compton model

03

No detection by AGILE despite extensive campaign

Abstract

The blazar PG 1553+113 is a well known TeV gamma-ray emitter. In this paper, we determine its spectral energy distribution using simultaneous multi-frequency data in order to study its emission processes. An extensive campaign was carried out between March and April 2008, where optical, X-ray, high-energy (HE) gamma-ray, and very-high-energy (VHE) gamma-ray data were obtained with the KVA, Abastumani, REM, RossiXTE/ASM, AGILE and MAGIC telescopes, respectively. This is the first simultaneous broad-band (i.e., HE+VHE) gamma-ray observation, though AGILE did not detect the source. We combine data to derive source's spectral energy distribution and interpret its double peaked shape within the framework of a synchrotron self compton model

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