DISCOVERY OF VERY HIGH ENERGY GAMMA RAYS FROM PKS 1424+240 AND MULTIWAVELENGTH CONSTRAINTS ON ITS REDSHIFT
| Title: | DISCOVERY OF VERY HIGH ENERGY GAMMA RAYS FROM PKS 1424+240 AND MULTIWAVELENGTH CONSTRAINTS ON ITS REDSHIFT |
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| Authors: | ACCIARI VA; ALIU E; ARLEN T; AUNE T; BAUTISTA M; BEILICKE M; BENBOW W; BOTTCHER M; BOLTUCH D; BRADBURY SM; BUCKLEY JH; BUGAEV V; BYRUM K; CANNON A; CESARINI A; CHOW YC; CIUPIK L; COGAN P; CUI W; DUKE C; FALCONE A; FINLEY JP; FINNEGAN G; FORTSON L; FURNISS A; GALANTE N; GALL D; GILLANDERS GH; GODAMBE S; GRUBE J; GUENETTE R; GYUK G; HANNA D; HOLDER J; HUI CM; HUMENSKY TB; KAARET P; KARLSSON N; KERTZMAN M; KIEDA D; KONOPELKO A; KRAWCZYNSKI H; KRENNRICH F; LANG MJ; LEBOHEC S; MAIER G; MCARTHUR S; MCCANN A; MCCUTCHEON M; MILLIS J; MORIARTY P; NAGAI T; ONG RA; OTTE AN; PANDEL D; PERKINS JS; PICHEL A; POHL M; QUINN J; RAGAN K; REYES LC; REYNOLDS PT; ROACHE E; ROSE HJ; SCHROEDTER M; SEMBROSKI GH; SENTURK GD; SMITH AW; STEELE D; SWORDY SP; THEILING M; THIBADEAU S; VARLOTTA A; VASSILIEV VV; VINCENT S; WAGNER RG; WAKELY SP; WARD JE; WEEKES TC; WEINSTEIN A; WEISGARBER T; WILLIAMS DA; WISSEL S; WOOD M; ZITZER B; ABDO AA; ACKERMANN M; AJELLO M; BALDINI L; BALLET J; BARBIELLINI G; BAUGHMAN BM; BECHTOL K; BELLAZZINI R; BERENJI B; BLANDFORD RD; BLOOM ED; BONAMENTE E; BORGLAND AW; BREGEON J; BREZ A; BRIGIDA M; BRUEL P; BURNETT TH; CALIANDRO GA; CAMERON RA; CARAVEO PA; CASANDJIAN JM; CAVAZZUTI E; CECCHI C; CELIK O; CHEKHTMAN A; CHEUNG CC; CHIANG J; CIPRINI S; CLAUS R; COHEN TANUGI J; CONRAD J; CUTINI S; DERMER CD; DE ANGELIS A; DE PALMA F; SILVA EDE; DRELL PS; DRLICA WAGNER A; DUBOIS R; DUMORA D; FARNIER C; FAVUZZI C; FEGAN SJ; FOCKE WB; FORTIN P; FRAILIS M; FUKAZAWA Y; FUSCO P; GARGANO F; GASPARRINI D; GEHRELS N; GERMANI S; GIEBELS B; GIGLIETTO N; GIOMMI P; GIORDANO F; GLANZMAN T; GODFREY G; GRENIER IA; GROVE JE; GUILLEMOT L; GUIRIEC S; HANABATA Y; HAYS E; HUGHES RE; JACKSON MS; JOHANNESSON G; JOHNSON AS; JOHNSON WN; KAMAE T; KATAGIRI H; KATAOKA J; KAWAI N; KERR M; KNODLSEDER J; KOCIAN ML; KUSS M; LANDE J; LATRONICO L; LONGO F; LOPARCO F; LOTT B; LOVELLETTE MN; LUBRANO P; MADEJSKI GM; MAKEEV A; MAZZIOTTA MN; MCENERY JE; MEURER C; MICHELSON PF; MITTHUMSIRI W; MIZUNO T; MOISEEV AA; MONTE C; MONZANI ME; MORSELLI A; MOSKALENKO IV; MURGIA S; NOLAN PL; NORRIS JP; NUSS E; OHSUGI T; OMODEI N; ORLANDO E; ORMES JF; PANEQUE D; PARENT D; PELASSA V; PEPE M; PESCE ROLLINS M; PIRON F; PORTER TA; RAINO S; RAZZANO M; REIMER A; REIMER O; REPOSEUR T; RODRIGUEZ AY; ROTH M; RYDE F; SADROZINSKI HFW; SANCHEZ D; SANDER A; PARKINSON PMS; SCARGLE JD; SGRO C; SHAW MS; SISKIND EJ; SMITH PD; SPANDRE G; SPINELLI P; STRICKMAN MS; SUSON DJ; TAJIMA H; TAKAHASHI H; TANAKA T; THAYER JB; THAYER JG; THOMPSON DJ; TORRES DF; TOSTI G; TRAMACERE A; UCHIYAMA Y; USHER TL; VASILEIOU V; VILCHEZ N; VITALE V; WAITE AP; WANG P; WINER BL; WOOD KS; YLINEN T; ZIEGLER M; BARBER SD; TERNDRUP DM; BASTIERI, DENIS; RANDO, RICCARDO; TIBALDO, LUIGI |
| Contributors: | Acciari, Va; Aliu, E; Arlen, T; Aune, T; Bautista, M; Beilicke, M; Benbow, W; Bottcher, M; Boltuch, D; Bradbury, Sm; Buckley, Jh; Bugaev, V; Byrum, K; Cannon, A; Cesarini, A; Chow, Yc; Ciupik, L; Cogan, P; Cui, W; Duke, C; Falcone, A; Finley, Jp; Finnegan, G; Fortson, L; Furniss, A; Galante, N; Gall, D; Gillanders, Gh; Godambe, S; Grube, J; Guenette, R; Gyuk, G; Hanna, D; Holder, J; Hui, Cm; Humensky, Tb; Kaaret, P; Karlsson, N; Kertzman, M; Kieda, D; Konopelko, A; Krawczynski, H; Krennrich, F; Lang, Mj; Lebohec, S; Maier, G; Mcarthur, S; Mccann, A; Mccutcheon, M; Millis, J; Moriarty, P; Nagai, T; Ong, Ra; Otte, An; Pandel, D; Perkins, J; Pichel, A; Pohl, M; Quinn, J; Ragan, K; Reyes, Lc; Reynolds, Pt; Roache, E; Rose, Hj; Schroedter, M; Sembroski, Gh; Senturk, Gd; Smith, Aw; Steele, D; Swordy, Sp; Theiling, M; Thibadeau, S; Varlotta, A; Vassiliev, Vv; Vincent, S; Wagner, Rg; Wakely, Sp; Ward, Je; Weekes, Tc; Weinstein, A; Weisgarber, T; Williams, Da; Wissel, S; Wood, M; Zitzer, B; Abdo, Aa; Ackermann, M; Ajello, M; Baldini, L; Ballet, J; Barbiellini, G; Bastieri, Deni; Baughman, Bm; Bechtol, K; Bellazzini, R; Berenji, B; Blandford, Rd; Bloom, Ed; Bonamente, E; Borgland, Aw |
| Publication Year: | 2010 |
| Collection: | Padua Research Archive (IRIS - Università degli Studi di Padova) |
| Description: | We report the first detection of very high energy83Gamma-ray emission above 100 GeV. (VHE) gamma-ray emission above 140 GeV from PKS 1424+240, a BL Lac object with an unknown redshift. The photon spectrum above 140 GeV measured by VERITAS is well described by a power law with a photon index of 3.8 ± 0.5stat ± 0.3syst and a flux normalization at 200 GeV of (5.1 ± 0.9stat ± 0.5syst) × 10–11 TeV–1 cm–2 s–1, where stat and syst denote the statistical and systematical uncertainties, respectively. The VHE flux is steady over the observation period between MJD 54881 and 55003 (from 2009 February 19 to June 21). Flux variability is also not observed in contemporaneous high-energy observations with the Fermi Large Area Telescope. Contemporaneous X-ray and optical data were also obtained from the Swift XRT and MDM observatory, respectively. The broadband spectral energy distribution is well described by a one-zone synchrotron self-Compton model favoring a redshift of less than 0.1. Using the photon index measured with Fermi in combination with recent extragalactic background light absorption models it can be concluded from the VERITAS data that the redshift of PKS 1424+240 is less than 0.66. |
| Document Type: | article in journal/newspaper |
| Language: | unknown |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/WOS:000273308000007; volume:708; firstpage:L100; lastpage:L106; numberofpages:7; journal:THE ASTROPHYSICAL JOURNAL LETTERS; https://hdl.handle.net/11577/2427419 |
| DOI: | 10.1088/2041-8205/708/2/L100 |
| Availability: | https://hdl.handle.net/11577/2427419; https://doi.org/10.1088/2041-8205/708/2/L100 |
| Rights: | info:eu-repo/semantics/openAccess ; license:Creative commons ; license uri:http://creativecommons.org/licenses/by/4.0/ |
| Accession Number: | edsbas.BE2CBAFD |
| Database: | BASE |