Gamma-ray blazar spectra with HESS II mono analysis: The case of PKS2155-304 
and PG1553+113

Abdalla, H.; Abramowski, A.; Aharonian, F.; Benkhali, F. Ait; Akhperjanian, A. G.; Andersson, T.; Anguener, E. O.; Arrieta, M.; Aubert, P.; Backes, M.; Balzer, A.; Barnard, M.; Becherini, Y.; Tjus, J. Becker; Berge, D.; Bernhard, S.; Bernloehr, K.; Blackwell, R.; Bottcher, M.; Boisson, C.; Bolmont, J.; Bordas, P.; Brun, F.; Brun, P.; Bryan, M.; Bulik, T.; Capasso, M.; Carr, J.; Casanova, S.; Cerruti, M.; Chakraborty, N.; Chalme-Calvet, R.; Chaves, R. C. G.; Chen, A.; Chevalier, J.; Chretien, M.; Colafrancesco, S.; Cologna, G.; Condon, B.; Conrad, J.; Couturier, C.; Cui, Y.; Davids, I. D.; Degrange, B.; Deil, C.; Devin, J.; dewilt, P.; Dirson, L.; Djannati-Atai, A.; Domainko, W.; Donath, A.; Drury, L. O'C.; Dubus, G.; Dutson, K.; Dyks, J.; Edwards, T.; Egberts, K.; Eger, P.; Ernenwein, J. -P.; Eschbach, S.; Farnier, C.; Fegan, S.; Fernandes, M. V.; Fiasson, A.; Fontaine, G.; Forster, A.; Funk, S.; Fuessling, M.; Gabici, S.; Gajdus, M.; Gallant, Y. A.; Garrigoux, T.; Giavitto, G.; Giebels, B.; Glicenstein, J. F.; Gottschall, D.; Goyal, A.; Grondin, M. -H.; Hadasch, D.; Hahn, J.; Haupt, M.; Hawkes, J.; Heinzelmann, G.; Henri, G.; Hermann, G.; Hervet, O.; Hillert, A.; Hinton, James Anthony; Hofmann, Werner; Hoischen, C.; Holler, M.; Horns, D.; Ivascenko, A.; Jacholkowska, A.; Jamrozy, M.; Janiak, M.; Jankowsky, D.; Jankowsky, F.; Jingo, M.; Jogler, T.; Jouvin, L.; Jung-Richardt, I.; Kastendieck, M. A.; Katarzynski, K.; Katz, U.; Kerszberg, D.; Khelifi, B.; Kieffer, M.; King, J.; Klepser, S.; Klochkov, D.; Kluzniak, W.; Kolitzus, D.; Komin, Nu.; Kosack, K.; Krakau, S.; Kraus, M.; Krayzel, F.; Kruger, P. P.; Laffon, H.; Lamanna, G.; Lau, J.; Lees, J. -P.; Lefaucheur, J.; Lefranc, V.; Lemiere, A.; Lemoine-Goumard, M.; Lenain, J. -P.; Leser, E.; Lohse, T.; Lorentz, M.; Liu, R.; Lopez-Coto, R.; Lypova, I.; Marandon, V.; Marcowith, A.; Mariaud, C.; Marx, R.; Maurin, G.; Maxted, N.; Mayer, M.; Meintjes, P. J.; Meyer, M.; Mitchell, A. M. W.; Moderski, R.; Mohamed, M.; Mohrmann, L.; Mora, K.; Moulin, E.; Murach, T.; de Naurois, M.; Niederwanger, F.; Niemiec, J.; Oakes, L.; O'Brien, P.; Odaka, H.; Oul, S.; Ohm, S.; Ostrowski, M.; Oya, I.; Padovani, M.; Panter, M.; Parsons, R. D.; Arribas, M. Paz; Pekeur, N. W.; Pelletier, G.; Perennes, C.; Petrucci, P. -O.; Peyaud, B.; Pita, S.; Poon, H.; Prokhorov, D.; Prokoph, H.; Puehlhofer, G.; Punch, M.; Quirrenbach, A.; Raab, S.; Reimer, A.; Reimer, O.; Renaud, M.; de los Reyes, R.; Rieger, F.; Romoli, C.; Rosier-Lees, S.; Rowell, G.; Rudak, B.; Rulten, C. B.; Sahakian, V.; Salek, D.; Sanchez, D. A.; Santangelo, A.; Sasaki, M.; Schlickeiser, R.; Schussler, F.; Schulz, A.; Schwanke, U.; Schwemmer, S.; Settimo, M.; Seyffert, A. S.; Shafi, N.; Shilon, I.; Simoni, R.; Sol, H.; Spanier, F.; Spengler, G.; Spies, F.; Stawarz, L.; Steenkamp, R.; Stegmann, C.; Stinzing, F.; Stycz, K.; Sushch, I.; Tavernet, J. -P.; Tavernier, T.; Taylor, A. M.; Terrier, R.; Tibaldo, L.; Tiziani, D.; Tluczykont, M.; Trichard, C.; Tuffs, R.; Uchiyama, Y.; van der Walt, D. J.; van Edik, C.; van Soelen, B.; Vasileiadis, G.; Veh, J.; Venter, C.; Viana, A.; Vincent, P.; Vink, J.; Voisin, F.; Voelk, H. J.; Vuillaume, T.; Wadiasingh, Z.; Wagner, S. J.; Wagner, P.; Wagner, R. M.; White, R.; Wierzcholska, A.; Willmann, P.; Woernlein, A.; Wouters, D.; Yang, R.; Zabalza, V.; Zaborov, D.; Zacharias, M.; Zdziarski, A. A.; Zech, A.; Zefi, F.; Ziegler, A.; Zywucka, N.; Ackermann, M.; Ajello, M.; Baldini, L.; Barbiellini, G.; Bellazzini, R.; Blandford, R. D.; Bonino, R.; Bregeon, J.; Bruel, P.; Buehler, R.; Caliandro, G. A.; Cameron, R. A.; Caragiulo, M.; Caraveo, P. A.; Cavazzuti, E.; Cecchi, C.; Chiang, J.; Chiaro, G.; Ciprini, S.; Cohen-Tanugi, J.; Costanza, F.; Cutini, S.; D'Ammando, F.; de Palma, F.; Desiante, R.; Di Lalla, N.; Di Mauro, M.; Di Venere, L.; Donaggio, B.; Favuzzi, C.; Focke, W. B.; Fusco, P.; Gargano, F.; Gasparrini, D.; Giglietto, N.; Giordano, F.; Giroletti, M.; Guillemot, L.; Guiriec, S.; Horan, D.; Johannesson, G.; Kamae, T.; Kensei, S.; Kocevski, D.; Larsson, S.; Li, J.; Longo, F.; Loparco, F.; Lovellette, M. N.; Lubrano, P.; Maldera, S.; Manfreda, A.; Mazziotta, M. N.; Michelson, P. F.; Mizuno, T.; Monzani, M. E.; Morselli, A.; Negro, M.; Nuss, E.; Orienti, M.; Orlando, E.; Paneque, D.; Perkins, J. S.; Pesce-Rollins, M.; Piron, F.; Pivato, G.; Porter, T. A.; Principe, G.; Raino, S.; Razzano, M.; Simone, D.; Siskind, E. J.; Spada, F.; Spinelli, P.; Thayer, J. B.; Torres, D. F.; Torresi, E.; Troja, E.; Vianello, G.; Wood, K. S.

doi:10.1051/0004-6361/201629427

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Gamma-ray blazar spectra with HESS II mono analysis: The case of PKS2155-304 and PG1553+113

Abdalla, H., Abramowski, A., Aharonian, F., Benkhali, F. A., Akhperjanian, A. G., Andersson, T., et al. (2017). Gamma-ray blazar spectra with HESS II mono analysis: The case of PKS2155-304 and PG1553+113. Astronomy and Astrophysics, 600: A89. doi:10.1051/0004-6361/201629427.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0001-2E0D-F Version Permalink: https://hdl.handle.net/21.11116/0000-0001-2E0E-E

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Abdalla, H.¹, Author
Abramowski, A.¹, Author
Aharonian, F.², Author
Benkhali, F. Ait¹, Author
Akhperjanian, A. G.¹, Author
Andersson, T.¹, Author
Anguener, E. O.¹, Author
Arrieta, M.¹, Author
Aubert, P.¹, Author
Backes, M.¹, Author
Balzer, A.¹, Author
Barnard, M.¹, Author
Becherini, Y.¹, Author
Tjus, J. Becker¹, Author
Berge, D.¹, Author
Bernhard, S.¹, Author
Bernloehr, K.¹, Author
Blackwell, R.¹, Author
Bottcher, M.¹, Author
Boisson, C.¹, Author
Bolmont, J.¹, AuthorBordas, P.¹, AuthorBrun, F.¹, AuthorBrun, P.¹, AuthorBryan, M.¹, AuthorBulik, T.¹, AuthorCapasso, M.¹, AuthorCarr, J.¹, AuthorCasanova, S.¹, AuthorCerruti, M.¹, AuthorChakraborty, N.¹, AuthorChalme-Calvet, R.¹, AuthorChaves, R. C. G.¹, AuthorChen, A.¹, AuthorChevalier, J.¹, AuthorChretien, M.¹, AuthorColafrancesco, S.¹, AuthorCologna, G.¹, AuthorCondon, B.¹, AuthorConrad, J.¹, AuthorCouturier, C.¹, AuthorCui, Y.¹, AuthorDavids, I. D.¹, AuthorDegrange, B.¹, AuthorDeil, C.¹, AuthorDevin, J.¹, Authordewilt, P.¹, AuthorDirson, L.¹, AuthorDjannati-Atai, A.¹, AuthorDomainko, W.¹, AuthorDonath, A.¹, AuthorDrury, L. O'C.¹, AuthorDubus, G.¹, AuthorDutson, K.¹, AuthorDyks, J.¹, AuthorEdwards, T.¹, AuthorEgberts, K.¹, AuthorEger, P.¹, AuthorErnenwein, J. -P.¹, AuthorEschbach, S.¹, AuthorFarnier, C.¹, AuthorFegan, S.¹, AuthorFernandes, M. V.¹, AuthorFiasson, A.¹, AuthorFontaine, G.¹, AuthorForster, A.¹, AuthorFunk, S.¹, AuthorFuessling, M.¹, AuthorGabici, S.¹, AuthorGajdus, M.¹, AuthorGallant, Y. A.¹, AuthorGarrigoux, T.¹, AuthorGiavitto, G.¹, AuthorGiebels, B.¹, AuthorGlicenstein, J. F.¹, AuthorGottschall, D.¹, AuthorGoyal, A.¹, AuthorGrondin, M. -H.¹, AuthorHadasch, D.¹, AuthorHahn, J.¹, AuthorHaupt, M.¹, AuthorHawkes, J.¹, AuthorHeinzelmann, G.¹, AuthorHenri, G.¹, AuthorHermann, G.¹, AuthorHervet, O.¹, AuthorHillert, A.¹, AuthorHinton, James Anthony³, Author Hofmann, Werner², Author Hoischen, C.¹, AuthorHoller, M.¹, AuthorHorns, D.¹, AuthorIvascenko, A.¹, AuthorJacholkowska, A.¹, AuthorJamrozy, M.¹, AuthorJaniak, M.¹, AuthorJankowsky, D.¹, AuthorJankowsky, F.¹, AuthorJingo, M.¹, AuthorJogler, T.¹, AuthorJouvin, L.¹, AuthorJung-Richardt, I.¹, AuthorKastendieck, M. A.¹, AuthorKatarzynski, K.¹, AuthorKatz, U.¹, AuthorKerszberg, D.¹, AuthorKhelifi, B.¹, AuthorKieffer, M.¹, AuthorKing, J.¹, AuthorKlepser, S.¹, AuthorKlochkov, D.¹, AuthorKluzniak, W.¹, AuthorKolitzus, D.¹, AuthorKomin, Nu.¹, AuthorKosack, K.¹, AuthorKrakau, S.¹, AuthorKraus, M.¹, AuthorKrayzel, F.¹, AuthorKruger, P. P.¹, AuthorLaffon, H.¹, AuthorLamanna, G.¹, AuthorLau, J.¹, AuthorLees, J. -P.¹, AuthorLefaucheur, J.¹, AuthorLefranc, V.¹, AuthorLemiere, A.¹, AuthorLemoine-Goumard, M.¹, AuthorLenain, J. -P.¹, AuthorLeser, E.¹, AuthorLohse, T.¹, AuthorLorentz, M.¹, AuthorLiu, R.¹, AuthorLopez-Coto, R.¹, AuthorLypova, I.¹, AuthorMarandon, V.¹, AuthorMarcowith, A.¹, AuthorMariaud, C.¹, AuthorMarx, R.¹, AuthorMaurin, G.¹, AuthorMaxted, N.¹, AuthorMayer, M.¹, AuthorMeintjes, P. J.¹, AuthorMeyer, M.¹, AuthorMitchell, A. M. W.¹, AuthorModerski, R.¹, AuthorMohamed, M.¹, AuthorMohrmann, L.¹, AuthorMora, K.¹, AuthorMoulin, E.¹, AuthorMurach, T.¹, Authorde Naurois, M.¹, AuthorNiederwanger, F.¹, AuthorNiemiec, J.¹, AuthorOakes, L.¹, AuthorO'Brien, P.¹, AuthorOdaka, H.¹, AuthorOul, S.¹, AuthorOhm, S.¹, AuthorOstrowski, M.¹, AuthorOya, I.¹, AuthorPadovani, M.¹, AuthorPanter, M.¹, AuthorParsons, R. D.¹, AuthorArribas, M. Paz¹, AuthorPekeur, N. W.¹, AuthorPelletier, G.¹, AuthorPerennes, C.¹, AuthorPetrucci, P. -O.¹, AuthorPeyaud, B.¹, AuthorPita, S.¹, AuthorPoon, H.¹, AuthorProkhorov, D.¹, AuthorProkoph, H.¹, AuthorPuehlhofer, G.¹, AuthorPunch, M.¹, AuthorQuirrenbach, A.¹, AuthorRaab, S.¹, AuthorReimer, A.¹, AuthorReimer, O.¹, AuthorRenaud, M.¹, Authorde los Reyes, R.¹, AuthorRieger, F.¹, AuthorRomoli, C.¹, AuthorRosier-Lees, S.¹, AuthorRowell, G.¹, AuthorRudak, B.¹, AuthorRulten, C. B.¹, AuthorSahakian, V.¹, AuthorSalek, D.¹, AuthorSanchez, D. A.¹, AuthorSantangelo, A.¹, AuthorSasaki, M.¹, AuthorSchlickeiser, R.¹, AuthorSchussler, F.¹, AuthorSchulz, A.¹, AuthorSchwanke, U.¹, AuthorSchwemmer, S.¹, AuthorSettimo, M.¹, AuthorSeyffert, A. S.¹, AuthorShafi, N.¹, AuthorShilon, I.¹, AuthorSimoni, R.¹, AuthorSol, H.¹, AuthorSpanier, F.¹, AuthorSpengler, G.¹, AuthorSpies, F.¹, AuthorStawarz, L.¹, AuthorSteenkamp, R.¹, AuthorStegmann, C.¹, AuthorStinzing, F.¹, AuthorStycz, K.¹, AuthorSushch, I.¹, AuthorTavernet, J. -P.¹, AuthorTavernier, T.¹, AuthorTaylor, A. M.¹, AuthorTerrier, R.¹, AuthorTibaldo, L.¹, AuthorTiziani, D.¹, AuthorTluczykont, M.¹, AuthorTrichard, C.¹, AuthorTuffs, R.¹, AuthorUchiyama, Y.¹, Authorvan der Walt, D. J.¹, Authorvan Edik, C.¹, Authorvan Soelen, B.¹, AuthorVasileiadis, G.¹, AuthorVeh, J.¹, AuthorVenter, C.¹, AuthorViana, A.¹, AuthorVincent, P.¹, AuthorVink, J.¹, AuthorVoisin, F.¹, AuthorVoelk, H. J.¹, AuthorVuillaume, T.¹, AuthorWadiasingh, Z.¹, AuthorWagner, S. J.¹, AuthorWagner, P.¹, AuthorWagner, R. M.¹, AuthorWhite, R.¹, AuthorWierzcholska, A.¹, AuthorWillmann, P.¹, AuthorWoernlein, A.¹, AuthorWouters, D.¹, AuthorYang, R.¹, AuthorZabalza, V.¹, AuthorZaborov, D.¹, AuthorZacharias, M.¹, AuthorZdziarski, A. A.¹, AuthorZech, A.¹, AuthorZefi, F.¹, AuthorZiegler, A.¹, AuthorZywucka, N.¹, AuthorAckermann, M.¹, AuthorAjello, M.¹, AuthorBaldini, L.¹, AuthorBarbiellini, G.¹, AuthorBellazzini, R.¹, AuthorBlandford, R. D.¹, AuthorBonino, R.¹, AuthorBregeon, J.¹, AuthorBruel, P.¹, AuthorBuehler, R.¹, AuthorCaliandro, G. A.¹, AuthorCameron, R. A.¹, AuthorCaragiulo, M.¹, AuthorCaraveo, P. A.¹, AuthorCavazzuti, E.¹, AuthorCecchi, C.¹, AuthorChiang, J.¹, AuthorChiaro, G.¹, AuthorCiprini, S.¹, AuthorCohen-Tanugi, J.¹, AuthorCostanza, F.¹, AuthorCutini, S.¹, AuthorD'Ammando, F.¹, Authorde Palma, F.¹, AuthorDesiante, R.¹, AuthorDi Lalla, N.¹, AuthorDi Mauro, M.¹, AuthorDi Venere, L.¹, AuthorDonaggio, B.¹, AuthorFavuzzi, C.¹, AuthorFocke, W. B.¹, AuthorFusco, P.¹, AuthorGargano, F.¹, AuthorGasparrini, D.¹, AuthorGiglietto, N.¹, AuthorGiordano, F.¹, AuthorGiroletti, M.¹, AuthorGuillemot, L.¹, AuthorGuiriec, S.¹, AuthorHoran, D.¹, AuthorJohannesson, G.¹, AuthorKamae, T.¹, AuthorKensei, S.¹, AuthorKocevski, D.¹, AuthorLarsson, S.¹, AuthorLi, J.¹, AuthorLongo, F.¹, AuthorLoparco, F.¹, AuthorLovellette, M. N.¹, AuthorLubrano, P.¹, AuthorMaldera, S.¹, AuthorManfreda, A.¹, AuthorMazziotta, M. N.¹, AuthorMichelson, P. F.¹, AuthorMizuno, T.¹, AuthorMonzani, M. E.¹, AuthorMorselli, A.¹, AuthorNegro, M.¹, AuthorNuss, E.¹, AuthorOrienti, M.¹, AuthorOrlando, E.¹, AuthorPaneque, D.¹, AuthorPerkins, J. S.¹, AuthorPesce-Rollins, M.¹, AuthorPiron, F.¹, AuthorPivato, G.¹, AuthorPorter, T. A.¹, AuthorPrincipe, G.¹, AuthorRaino, S.¹, AuthorRazzano, M.¹, AuthorSimone, D.¹, AuthorSiskind, E. J.¹, AuthorSpada, F.¹, AuthorSpinelli, P.¹, AuthorThayer, J. B.¹, AuthorTorres, D. F.¹, AuthorTorresi, E.¹, AuthorTroja, E.¹, AuthorVianello, G.¹, AuthorWood, K. S.¹, Author more..

Affiliations:
1external, ou_persistent22
2Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society, ou_904550
3Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society, ou_2074298

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MPINP: HESS - Abteilung Hofmann

Abstract: Context. The addition of a 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment's sensitivity to lower energies. The lowest energy threshold is obtained using monoscopic analysis of data taken with CT5, providing access to gamma-ray energies below 100 GeV for small zenith angle observations. Such an extension of the instrument's energy range is particularly beneficial for studies of active galactic nuclei with soft spectra, as expected for those at a redshift >= 0.5. The high-frequency peaked BL Lac objects PKS 2155-304 (z = 0.116) and PG 1553 + 113 (0.43 < z < 0.58) are among the brightest objects in the gamma-ray sky, both showing clear signatures of gamma-ray absorption at E > 100 GeV interpreted as being due to interactions with the extragalactic background light (EBL). Aims. The aims of this work are twofold: to demonstrate the monoscopic analysis of CT5 data with a low energy threshold, and to obtain accurate measurements of the spectral energy distributions (SED) of PKS 2155-304 and PG 1553 + 113 near their SED peaks at energies approximate to 100 GeV. Methods. Multiple observational campaigns of PKS 2155 304 and PG 1553 + 113 were conducted during 2013 and 2014 using the full H.E.S.S. II instrument (CT1-5). A monoscopic analysis of the data taken with the new CT5 telescope was developed along with an investigation into the systematic uncertainties on the spectral parameters which are derived from this analysis. Results. Using the data from CT5, the energy spectra of PKS 2155 304 and PG 1553 + 113 were reconstructed down to conservative threshold energies of 80 GeV for PKS 2155 304, which transits near zenith, and 110 GeV for the more northern PG 1553 + 113. The measured spectra, well fitted in both cases by a log-parabola spectral model ( with a 5.0 similar to statistical preference for non-zero curvature for PKS 2155 304 and 4.5 sigma for PG 1553+113), were found consistent with spectra derived from contemporaneous Fermi-LAT data, indicating a sharp break in the observed spectra of both sources at E approximate to 100 GeV. When corrected for EBL absorption, the intrinsic H.E.S.S. II mono and Fermi-LAT spectrum of PKS 2155 304 was found to show significant curvature. For PG 1553+113, however, no significant detection of curvature in the intrinsic spectrum could be found within statistical and systematic uncertainties.

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Dates: Published Online: 2017

Publication Status: Published online

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Identifiers: DOI: 10.1051/0004-6361/201629427

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Title: Astronomy and Astrophysics

Other : Astron. Astrophys.

Source Genre: Journal

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Publ. Info: Berlin : Springer-Verlag

Pages: - Volume / Issue: 600 Sequence Number: A89 Start / End Page: - Identifier: ISSN: 0004-6361
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1