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- Abramowski, A. (author)
Discovery of VHE gamma-ray emission and multi-wavelength observations of the BL Lacertae object 1RXSJ101015.9-311909
- Article/chapterEnglish2012
Publisher, publication year, extent ...
- 2012-06-13
- EDP Sciences,2012
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:lnu-30220
- https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-30220URI
- https://doi.org/10.1051/0004-6361/201218910DOI
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-162404URI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
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Notes
- 1RXS J101015.9-311909 is a galaxy located at a redshift of z = 0.14 hosting an active nucleus (called AGN) 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 and 2010 with the H. E. S. S. instrument, an array of four imaging atmospheric Cherenkov telescopes. 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 standard deviations. The photon spectrum above 0.2 TeV can be described by a power-law with a photon index of Gamma = 3.08 +/- 0.42(stat) +/- 0.20(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 in the 100 MeV to 200 GeV energy range is significant at 8.3 standard deviations 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(-0.05)(+0.04) x 10(-11) erg cm(-2) s(-1) in the 0.3-7 keV range. Finally, all the available data are used to study the multi-wavelength properties of the source. The spectral energy distribution (SED) can be reproduced using a simple one-zone Synchrotron Self Compton (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.
Subject headings and genre
- NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
- NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
- NATURVETENSKAP Fysik hsv//swe
- NATURAL SCIENCES Physical Sciences hsv//eng
- gamma rays: galaxies
- galaxies: active
- BL Lacertae objects: individual: 1RXS J101015.9-311909
- Astropartikelfysik
- Astroparticle Physics
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- Acero, F. (author)
- Aharonian, F. (author)
- Akhperjanian, A. G. (author)
- Anton, G. (author)
- Balzer, A. (author)
- Barnacka, A. (author)
- Becherini, YvonneUniversité Paris 7 Denis Diderot(Swepub:lnu)yvbeaa (author)
- Becker, J. (author)
- Bernloehr, K. (author)
- Birsin, E. (author)
- Biteau, J. (author)
- Bochow, A. (author)
- Boisson, C. (author)
- Bolmont, J. (author)
- Bordas, P. (author)
- Brucker, J. (author)
- Brun, F. (author)
- Brun, P. (author)
- Bulik, T. (author)
- Buesching, I. (author)
- Carrigan, S. (author)
- Casanova, S. (author)
- Cerruti, M. (author)
- Punch, MichaelUniv Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France(Swepub:lnu)mipuaa (author)
- Charbonnier, A. (author)
- Chaves, R. C. G. (author)
- Cheesebrough, A. (author)
- Cologna, G. (author)
- Conrad, J. (author)
- Dalton, M. (author)
- Daniel, M. K. (author)
- Davids, I. D.Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC) (author)
- Degrange, B. (author)
- Deil, C. (author)
- Dickinson, H. J. (author)
- Djannati-Atai, A. (author)
- Domainko, W. (author)
- Drury, L. O 'C. (author)
- Dubus, G. (author)
- Dutson, K. (author)
- Dyks, J. (author)
- Dyrda, M. (author)
- Egberts, K. (author)
- Eger, P. (author)
- Espigat, P. (author)
- Fallon, L. (author)
- Fegan, S. (author)
- Feinstein, F. (author)
- Fernandes, M. V. (author)
- Fiasson, A. (author)
- Fontaine, G. (author)
- Foerster, A. (author)
- Fuessling, M. (author)
- Gallant, Y. A. (author)
- Gast, H. (author)
- Gerard, L. (author)
- Gerbig, D. (author)
- Giebels, B. (author)
- Glicenstein, J. F. (author)
- Glueck, B. (author)
- Goering, D. (author)
- Haeffner, S. (author)
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- Hahn, J. (author)
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- Horns, D. (author)
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- de Jager, O. C. (author)
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- Jung, I. (author)
- Kastendieck, M. A. (author)
- Katarzynski, K. (author)
- Katz, U. (author)
- Kaufmann, S. (author)
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- Khelifi, B. (author)
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- Kneiske, T. (author)
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- Krayzel, F. (author)
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- Lohse, T. (author)
- Lopatin, A. (author)
- Lu, C. -C (author)
- Marandon, V. (author)
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- Mayer, M. (author)
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- Naumann, C. L. (author)
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- de Naurois, M. (author)
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- Nicholas, B. (author)
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- Opitz, B. (author)
- Ostrowski, M. (author)
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- Panter, M. (author)
- Arribas, M. Paz (author)
- Pekeur, N. W. (author)
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- Perez, J. (author)
- Petrucci, P. -O (author)
- Peyaud, B. (author)
- Pita, S. (author)
- Puehlhofer, G. (author)
- Punch, MichaelUniv Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France(Swepub:lnu)mipuaa (author)
- Quirrenbach, A. (author)
- Raue, M. (author)
- Rayner, S. M.Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC) (author)
- Reimer, A. (author)
- Reimer, O. (author)
- Renaud, M. (author)
- de los Reyes, R. (author)
- Rieger, F. (author)
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- Rob, L. (author)
- Rosier-Lees, S. (author)
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- Sahakian, V. (author)
- Sanchez, D. A. (author)
- Santangelo, A. (author)
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- Schulz, A. (author)
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- Université Paris 7 Denis DiderotUniv Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France (creator_code:org_t)
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