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  Characterizing the gamma-ray long-term variability of PKS2155 304 with HESS and Fermi-LAT

Abdalla, H., Abramowski, A., Aharonian, F., Benkhali, F. A., Akhperjanian, A. G., Andersson, T., et al. (2017). Characterizing the gamma-ray long-term variability of PKS2155 304 with HESS and Fermi-LAT. Astronomy and Astrophysics, 598: A39. doi:10.1051/0004-6361/201629419.

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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
Bernlorhr, K.1, Author
Blackwell, R.1, Author
Bottcher, M.1, Author
Boisson, C.1, Author
Bolmont, J.1, AuthorBordas, P.1, AuthorBregeon, J.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, Nachiketa2, Author           Chalme-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, AuthorCui, Y.1, AuthorDavids, I. D.1, AuthorDecock, J.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, AuthorFoerster, 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, AuthorHinton, J. A.3, Author           Hofmann, W.1, AuthorHoischen, 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, AuthorEr, M. Kie Ff1, 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, AuthorOettl, S.1, AuthorOhm, S.1, AuthorOstrowski, M.1, AuthorOya, I.1, AuthorPadovani, M.1, AuthorPanter, M.1, AuthorParsons, R. D.1, AuthorPekeur, N. W.1, AuthorPelletier, G.1, AuthorPerennes, C.1, AuthorPetrucci, P. -O.1, AuthorPeyaud, B.1, AuthorPiel, Q.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, AuthorErt, Ff1, 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 Eldik, C.1, Authorvan Rensburg, 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, 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: Hochenergie-Astrophysik Theorie - Abteilung Hofmann
 Abstract: Studying the temporal variability of BL Lac objects at the highest energies provides unique insights into the extreme physical processes occurring in relativistic jets and in the vicinity of super-massive black holes. To this end, the long-term variability of the BL Lac object PKS 2155 304 is analyzed in the high (HE, 100MeV < E < 300 GeV) and very high energy (VHE, E > 200 GeV) gamma-ray domain. Over the course of similar to 9 yr of H. E. S. S. observations the VHE light curve in the quiescent state is consistent with a log-normal behavior. The VHE variability in this state is well described by flicker noise (power-spectral-density index beta(VHE) = 1 .10(+ 0 : 10) (0 : 13)) on timescales larger than one day. An analysis of similar to 5.5 yr of HE Fermi-LAT data gives consistent results (beta(HE) = 1 : 20(+ 0 : 21) (0 : 23), on timescales larger than 10 days) compatible with the VHE findings. The HE and VHE power spectral densities show a scale invariance across the probed time ranges. A direct linear correlation between the VHE and HE fluxes could neither be excluded nor firmly established. These long-term-variability properties are discussed and compared to the red noise behavior (beta similar to 2) seen on shorter timescales during VHE-flaring states. The difference in power spectral noise behavior at VHE energies during quiescent and flaring states provides evidence that these states are influenced by different physical processes, while the compatibility of the HE and VHE long-term results is suggestive of a common physical link as it might be introduced by an underlying jet-disk connection.

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 Dates: 2017
 Publication Status: Published online
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 Identifiers: DOI: 10.1051/0004-6361/201629419
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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: 598 Sequence Number: A39 Start / End Page: - Identifier: ISSN: 0004-6361
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1