Discovery of VHE gamma-ray emission and multi-wavelength observations of the BL Lacertae object 1RXS J101015.9-311909

A. Abramowski; Fabio Acero; F. Aharonian; A. G. Akhperjanian; G. Anton; Agnès Balzer; A. Barnacka; Y. Becherini; J. Becker; K. Bernlöhr; E. Birsin; J. Biteau; A. Bochow; C. Boisson; J. Bolmont; P. Bordas; J. Brucker; F. Brun; P. Brun; T. Bulik; I. Büsching; S. Carrigan; S. Casanova; M. Cerruti; P. M. Chadwick; A. Charbonnier; R. C. G. Chaves; A. Cheesebrough; G. Cologna; J. Conrad; M. Dalton; M. K. Daniel; I. D. Davids; B. Degrange; C. Deil; H. J. Dickinson; A. Djannati-Ataï; W. Domainko; L. O'C. Drury; G. Dubus; K. Dutson; J. Dyks; M. Dyrda; K. Egberts; P. Eger; P. Espigat; L. Fallon; S. Fegan; F. Feinstein; M. V. Fernandes; A. Fiasson; G. Fontaine; A. Förster; M. Füssling; Y. A. Gallant; H. Gast; L. Gérard; D. Gerbig; B. Giebels; J. F. Glicenstein; B. Glück; D. Göring; S. Häffner; J. D. Hague; J. Hahn; D. Hampf; J. Harris; M. Hauser; S. Heinz; G. Heinzelmann; G. Henri; G. Hermann; A. Hillert; J. A. Hinton; W. Hofmann; P. Hofverberg; M. Holler; D. Horns; A. Jacholkowska; O. C. de Jager; C. Jahn; M. Jamrozy; I. Jung; M. A. Kastendieck; K. Katarzyński; U. Katz; S. Kaufmann; D. Keogh; B. Khélifi; D. Klochkov; W. Kluźniak; T. Kneiske; Nu. Komin; K. Kosack; R. Kossakowski; F. Krayzel; H. Laffon; G. Lamanna; J. -P. Lenain; D. Lennarz; T. Lohse; A. Lopatin; C. -C. Lu; V. Marandon; Alexandre Marcowith; Julien Masbou; N. Maxted; M. Mayer; T. J. L. Mccomb; M. C. Medina; J. Méhault; R. Moderski; M. Mohamed; Emmanuel Moulin; C. L. Naumann; M. Naumann-Godo; M. de Naurois; D. Nedbal; D. Nekrassov; N. Nguyen; B. Nicholas; J. Niemiec; S. J. Nolan; S. Ohm; E. de Oña Wilhelmi; B. Opitz; M. Ostrowski; I. Oya; M. Panter; M. Paz Arribas; N. W. Pekeur; G. Pelletier; J. Perez; P. -O. Petrucci; B. Peyaud; S. Pita; G. Pühlhofer; M. Punch; A. Quirrenbach; M. Raue; S. M. Rayner; A. Reimer; O. Reimer; Matthieu Renaud; R. de Los Reyes; F. Rieger; J. Ripken; L. Rob; S. Rosier-Lees; G. Rowell; B. Rudak; C. B. Rulten; V. Sahakian; D. A. Sanchez; A. Santangelo; R. Schlickeiser; A. Schulz; U. Schwanke; S. Schwarzburg; S. Schwemmer; F. Sheidaei; J. L. Skilton; H. Sol; G. Spengler; Ł. Stawarz; R. Steenkamp; C. Stegmann; F. Stinzing; K. Stycz; I. Sushch; A. Szostek; J. -P. Tavernet; R. Terrier; M. Tluczykont; K. Valerius; C. van Eldik; George Vasileiadis; C. Venter; A. Viana; P. Vincent; H. J. Völk; F. Volpe; S. Vorobiov; M. Vorster; S. J. Wagner; M. Ward; R. White; A. Wierzcholska; M. Zacharias; A. Zajczyk; A. A. Zdziarski; A. Zech; H. -S. Zechlin

doi:10.1051/0004-6361/201218910

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Discovery of VHE gamma-ray emission and multi-wavelength observations of the BL Lacertae object 1RXS J101015.9-311909

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Discovery of VHE gamma-ray emission and multi-wavelength observations of the BL Lacertae object 1RXS J101015.9-311909

A. Abramowski, Fabio Acero, F. Aharonian, A. G. Akhperjanian, G. Anton, Agnès Balzer, A. Barnacka, Y. Becherini, J. Becker, K. Bernlöhr, …

Astronomy & Astrophysics - A&A, Vol.542

2012

DOI: https://doi.org/10.1051/0004-6361/201218910

Abstract

1RXS J101015.9-311909 is a galaxy located at a redshift of z=0.14 hosting an active nucleus belonging to the class of bright BL Lac objects. Observations at high (HE, E > 100 MeV) and very high (VHE, E > 100 GeV) energies provide insights into the origin of very energetic particles present in such sources and the radiation processes at work. We report on results from VHE observations performed between 2006-10 with H.E.S.S. H.E.S.S. data have been analysed with enhanced analysis methods, making the detection of faint sources more significant. VHE emission at a position coincident with 1RXS J101015.9-311909 is detected with H.E.S.S. for the first time. In a total good-quality livetime of about 49 h, we measure 263 excess counts, corresponding to a significance of 7.1\sigma. The photon spectrum above 0.2 TeV can be described by a power-law with a photon index of \Gamma\ = 3.08\pm0.42_{stat}\pm0.20_{sys}. The integral flux above 0.2 TeV is about 0.8% of the flux of the Crab nebula and shows no significant variability over the time reported. In addition, public Fermi/LAT data are analysed to search for high energy emission from the source. The Fermi/LAT HE emission is significant at 8.3\sigma\ in the chosen 25-month dataset. UV and X-ray contemporaneous observations with the Swift satellite in May 2007 are also reported, together with optical observations performed with the ATOM telescope located at the H.E.S.S. site. Swift observations reveal an absorbed X-ray flux of F_{0.3-7 keV} = 1.04^{+0.04}_{-0.05} \times 10^{-11} erg.cm^{-2}.s^{-1} in the 0.3-7 keV range. Finally, all the available data are used to study the source's multi-wavelength properties. The SED can be reproduced using a simple one-zone SSC model with emission from a region with a Doppler factor of 30 and a magnetic field between 0.025 and 0.16 G. These parameters are similar to those obtained for other sources of this type.

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Title: Discovery of VHE gamma-ray emission and multi-wavelength observations of the BL Lacertae object 1RXS J101015.9-311909
Creators - without role: A. Abramowski - Universität Hamburg
Fabio Acero - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
F. Aharonian - Dublin Institute For Advanced Studies
A. G. Akhperjanian - National Academy of Sciences of Armenia
G. Anton - Friedrich-Alexander-Universität Erlangen-Nürnberg
Agnès Balzer - Friedrich-Alexander-Universität Erlangen-Nürnberg
A. Barnacka - Nicolaus Copernicus Astronomical Center
Y. Becherini - Laboratoire AstroParticule et Cosmologie
J. Becker - École Polytechnique
K. Bernlöhr - Ruhr University Bochum
E. Birsin - Ruhr University Bochum
J. Biteau - Université Paris Cité
A. Bochow - Max Planck Institute for Nuclear Physics
C. Boisson - Heidelberg University
J. Bolmont - Humboldt-Universität zu Berlin
P. Bordas - Délégation Paris 7
J. Brucker - Friedrich-Alexander-Universität Erlangen-Nürnberg
F. Brun - Laboratoire AstroParticule et Cosmologie
P. Brun - Institut de Recherche sur les Lois Fondamentales de l'Univers
T. Bulik - Université Paris Cité
I. Büsching - University of Tübingen
S. Carrigan - Max Planck Institute for Nuclear Physics
S. Casanova - University of Tübingen
M. Cerruti - Heidelberg University
P. M. Chadwick - University of Warsaw
A. Charbonnier - Humboldt-Universität zu Berlin
R. C. G. Chaves - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
A. Cheesebrough - University of Warsaw
G. Cologna - North-West University
J. Conrad - Laboratoire d’Annecy de Physique des Particules
M. Dalton - Ruhr University Bochum
M. K. Daniel - University of Warsaw
I. D. Davids - Stockholm University
B. Degrange - Laboratoire AstroParticule et Cosmologie
C. Deil - Max Planck Institute for Nuclear Physics
H. J. Dickinson - Laboratoire d’Annecy de Physique des Particules
A. Djannati-Ataï - Durham University
W. Domainko - Max Planck Institute for Nuclear Physics
L. O'C. Drury
G. Dubus - University of Namibia
K. Dutson - Université Joseph Fourier
J. Dyks - Nicolaus Copernicus Astronomical Center
M. Dyrda - University of Leicester
K. Egberts - Institute of Nuclear Physics, Polish Academy of Sciences
P. Eger - Friedrich-Alexander-Universität Erlangen-Nürnberg
P. Espigat - Durham University
L. Fallon - Dublin Institute For Advanced Studies
S. Fegan - Laboratoire AstroParticule et Cosmologie
F. Feinstein - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
M. V. Fernandes - Universität Hamburg
A. Fiasson - Laboratoire d’Annecy de Physique des Particules
G. Fontaine - Centre National de la Recherche Scientifique
A. Förster - Max Planck Institute for Nuclear Physics
M. Füssling
Y. A. Gallant - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
H. Gast - Max Planck Institute for Nuclear Physics
L. Gérard - Durham University
D. Gerbig - École Polytechnique
B. Giebels - Centre National de la Recherche Scientifique
J. F. Glicenstein - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
B. Glück - Friedrich-Alexander-Universität Erlangen-Nürnberg
D. Göring - Friedrich-Alexander-Universität Erlangen-Nürnberg
S. Häffner - Friedrich-Alexander-Universität Erlangen-Nürnberg
J. D. Hague - Max Planck Institute for Nuclear Physics
J. Hahn - Max Planck Institute for Nuclear Physics
D. Hampf - Universität Hamburg
J. Harris - University of Warsaw
M. Hauser - North-West University
S. Heinz - Friedrich-Alexander-Universität Erlangen-Nürnberg
G. Heinzelmann - Universität Hamburg
G. Henri - University of Namibia
G. Hermann - Max Planck Institute for Nuclear Physics
A. Hillert - Max Planck Institute for Nuclear Physics
J. A. Hinton - Université Joseph Fourier
W. Hofmann - Max Planck Institute for Nuclear Physics
P. Hofverberg - Max Planck Institute for Nuclear Physics
M. Holler - Friedrich-Alexander-Universität Erlangen-Nürnberg
D. Horns - Universität Hamburg
A. Jacholkowska - Laboratoire de Physique Nucléaire et de Hautes Énergies
O. C. de Jager - University of Tübingen
C. Jahn - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. Jamrozy - Jagiellonian University
I. Jung - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. A. Kastendieck - Universität Hamburg
K. Katarzyński - Nicolaus Copernicus University
U. Katz - Friedrich-Alexander-Universität Erlangen-Nürnberg
S. Kaufmann - North-West University
D. Keogh - University of Warsaw
B. Khélifi - Université Paris Cité
D. Klochkov - Délégation Paris 7
W. Kluźniak - Nicolaus Copernicus Astronomical Center
T. Kneiske - Universität Hamburg
Nu. Komin - Universität Innsbruck
K. Kosack - CEA Paris-Saclay
R. Kossakowski - Universität Innsbruck
F. Krayzel - Universität Innsbruck
H. Laffon - Laboratoire AstroParticule et Cosmologie
G. Lamanna - Universität Innsbruck
J. -P. Lenain - North-West University
D. Lennarz - Max Planck Institute for Nuclear Physics
T. Lohse - Ruhr University Bochum
A. Lopatin - Friedrich-Alexander-Universität Erlangen-Nürnberg
C. -C. Lu - Max Planck Institute for Nuclear Physics
V. Marandon - Max Planck Institute for Nuclear Physics
Alexandre Marcowith - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
Julien Masbou - Universität Innsbruck
N. Maxted - University of Adelaide
M. Mayer - Friedrich-Alexander-Universität Erlangen-Nürnberg
T. J. L. Mccomb - University of Warsaw
M. C. Medina - CEA Paris-Saclay
J. Méhault - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
R. Moderski - Nicolaus Copernicus Astronomical Center
M. Mohamed - North-West University
Emmanuel Moulin - Commissariat à l'Énergie Atomique et aux Énergies Alternatives
C. L. Naumann - Humboldt-Universität zu Berlin
M. Naumann-Godo - CEA Paris-Saclay
M. de Naurois - Université Paris Cité
D. Nedbal - Charles University
D. Nekrassov - Max Planck Institute for Nuclear Physics
N. Nguyen - Universität Hamburg
B. Nicholas - University of Adelaide
J. Niemiec - University of Leicester
S. J. Nolan - University of Warsaw
S. Ohm - University of Leeds
E. de Oña Wilhelmi
B. Opitz - Universität Hamburg
M. Ostrowski - Jagiellonian University
I. Oya
M. Panter - Max Planck Institute for Nuclear Physics
M. Paz Arribas - Ruhr University Bochum
N. W. Pekeur - University of Tübingen
G. Pelletier - University of Namibia
J. Perez - Institute of Nuclear Physics, Polish Academy of Sciences
P. -O. Petrucci - University of Namibia
B. Peyaud - CEA Paris-Saclay
S. Pita - Durham University
G. Pühlhofer - Délégation Paris 7
M. Punch - Durham University
A. Quirrenbach - North-West University
M. Raue - Universität Hamburg
S. M. Rayner - University of Warsaw
A. Reimer - Institute of Nuclear Physics, Polish Academy of Sciences
O. Reimer - Institute of Nuclear Physics, Polish Academy of Sciences
Matthieu Renaud - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
R. de Los Reyes
F. Rieger - Max Planck Institute for Nuclear Physics
J. Ripken - Laboratoire d’Annecy de Physique des Particules
L. Rob - Charles University
S. Rosier-Lees - Universität Innsbruck
G. Rowell - University of Adelaide
B. Rudak - Nicolaus Copernicus Astronomical Center
C. B. Rulten - University of Warsaw
V. Sahakian - A. Alikhanyan National Laboratory
D. A. Sanchez - Max Planck Institute for Nuclear Physics
A. Santangelo - Délégation Paris 7
R. Schlickeiser - École Polytechnique
A. Schulz - Friedrich-Alexander-Universität Erlangen-Nürnberg
U. Schwanke - Ruhr University Bochum
S. Schwarzburg - Délégation Paris 7
S. Schwemmer - North-West University
F. Sheidaei - University of Tübingen
J. L. Skilton - Max Planck Institute for Nuclear Physics
H. Sol - Heidelberg University
G. Spengler - Ruhr University Bochum
Ł. Stawarz - Jagiellonian University
R. Steenkamp - Stockholm University
C. Stegmann - Friedrich-Alexander-Universität Erlangen-Nürnberg
F. Stinzing - Friedrich-Alexander-Universität Erlangen-Nürnberg
K. Stycz - Friedrich-Alexander-Universität Erlangen-Nürnberg
I. Sushch - Ruhr University Bochum
A. Szostek - Jagiellonian University
J. -P. Tavernet - Laboratoire de Physique Nucléaire et de Hautes Énergies
R. Terrier - Durham University
M. Tluczykont - Universität Hamburg
K. Valerius - Friedrich-Alexander-Universität Erlangen-Nürnberg
C. van Eldik - Max Planck Institute for Nuclear Physics
George Vasileiadis - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
C. Venter - University of Tübingen
A. Viana - Institut de Recherche sur les Lois Fondamentales de l'Univers
P. Vincent - Humboldt-Universität zu Berlin
H. J. Völk - Max Planck Institute for Nuclear Physics
F. Volpe - Max Planck Institute for Nuclear Physics
S. Vorobiov - Université de Montpellier, Laboratoire Univers et Particules de Montpellier - LUPM
M. Vorster - University of Tübingen
S. J. Wagner - North-West University
M. Ward - University of Warsaw
R. White - Université Joseph Fourier
A. Wierzcholska - Jagiellonian University
M. Zacharias - École Polytechnique
A. Zajczyk - Laboratoire Univers et Particules de Montpellier
A. A. Zdziarski - Nicolaus Copernicus Astronomical Center
A. Zech - Universität Hamburg
H. -S. Zechlin - Universität Hamburg
Publication Details: Astronomy & Astrophysics - A&A, Vol.542
Identifiers: 9936300809311
Academic Unit: Laboratoire Univers et Particules de Montpellier - LUPM
Language: English
Resource Type: Journal article
Local Fields: in2p3-00690898