{"paper":{"title":"HESS J1943+213: a candidate extreme BL Lacertae object","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. A. Zdziarski, A. Balzer, A. Barnacka, A. B. Hill (external author), A. Bochow, A. C. Clapson, A. Charbonnier, A. Cheesebrough, A. Djannati-Ata\\\"i, A. Fiasson, A. F\\\"orster, A. G. Akhperjanian, A. Hoffmann, A. Jacholkowska, A. Lopatin, A. Marcowith, A. Quirrenbach, A. R. Bazer-Bachi, A. Reimer, A. Santangelo, A. Sch\\\"onwald, A. Schulz, A. Shalchi, A. Szostek, A. Viana, A. Wierzcholska, A. Zajczyk, A. Zech, B. Behera, B. Degrange, B. Giebels, B. Gl\\\"uck, B. Kh\\'elifi, B. Nicholas, B. Opitz, B. Rudak, C. Boisson, C. B. Rulten, C.-C. Lu, C. Deil, C. Farnier, C. Jahn, C. L. Naumann, C. Stegmann, C. van Eldik, C. Venter, D. Gerbig, D. G\\\"oring, D. Hampf, D. Horns, D. Keogh, D. Khangulyan, D. Klochkov, D. Lennarz, D. Maurin, D. Nedbal, D. Nekrassov, E. de O\\~na Wilhelmi, E. Moulin, F. Acero, F. Aharonian, F. Brun, F. Dubois, F. Feinstein, F. M. Sch\\\"ock, F. Rieger, F. Ryde, F. Stinzing, F. Volpe, G. Anton, G. Coignet, G. Dubus, G. Fontaine, G. Heinzelmann, G. Henri, G. Hermann, G. Lamanna, G. Pedaletti, G. Pelletier, G. P\\\"uhlhofer, G. Rowell, G. Spengler, G. Vasileiadis, H.E.S.S. Collaboration: A. Abramowski, H. Gast, H. J. Dickinson, H. J. V\\\"olk, H. Laffon, H. Sol, H.-S. Zechlin, I. B\\\"usching, I. D. Davids, I. Jung, I. Sushch, J. A. Hinton, J. Becker, J. Bolmont, J. Brucker, J. Conrad, J. D. Hague, J. Dyks, J. F. Glicenstein, J-F. Olive, J. L. Skilton, J. Masbou, J. M\\'ehault, J. Niemiec, J.-P. Tavernet, J. P. Vialle, J. Ripken, J. Ruppel, K. Bernl\\\"ohr, K. Egberts, K. Katarzy\\'nski, K. Kosack, K. Stycz, K. Valerius, L. Fallon, L. G\\'erard, L.-M. Chounet, L. O'C. Drury, L. Rob, \\L. Stawarz, M. A. Kastendieck, M. Cerruti, M. C. Medina, M. Dalton, M. de Naurois, M. Dyrda, M. F\\\"u{\\ss}ling, M. Hauser, M. Holler, M. Jamrozy, M. K. Daniel, M. Naumann-Godo, M. Ostrowski, M. Panter, M. Paz Arribas, M. Punch, M. Raue, M. Renaud, M. Sikora, M. Tluczykont, M. V. Fernandes, M. Vivier, M. Vorster, M. Ward, N. Maxted, N. Nguyen, Nu. Komin, O. C. de Jager, O. Reimer, O. Tibolla, P. Bordas, P. Brun, P. Colom, P. Eger, P. Espigat, P. Goret, P. Hofverberg, P. M. Chadwick, P.-O. Petrucci, P. Vincent, R. C. G. Chaves, R. de los Reyes, R. Kossakowski, R. Moderski, R. Schlickeiser, R. Steenkamp, R. Terrier, S. Carrigan, S. Casanova, S. Fegan, S. H\\\"affner, S. Heinz, S. J. Nolan, S. J. Wagner, S. Kaufmann, S. M. Rayner, S. Ohm, S. Pita, S. Rosier-Lees, S. Schwarzburg, S. Schwemmer, S. Vorobiov, T. Bulik, T. H. Burnett (external author), T. J. L. McComb, T. Kneiske, T. Lohse, U. Barres de Almeida, U. Katz, U. Schwanke, V. Borrel, V. Marandon, V. Sahakian, W. Domainko, W. Hofmann, W. Klu\\'zniak, Y. A. Gallant, Y. Becherini","submitted_at":"2011-03-03T19:29:29Z","abstract_excerpt":"We report on a newly detected point-like source, HESS J1943+213 located in the Galactic plane. This source coincides with an unidentified hard X-ray source IGR J19443+2117, which was proposed to have radio and infrared counterparts. HESS J1943+213 is detected at the significance level of 7.9 \\sigma (post-trials) at RA(J2000)=19h 43m 55s +- 1s (stat) +- 1s (sys), DEC(J2000) = +21deg 18' 8\" +- 17\" (stat) +- 20\" (sys). The source has a soft spectrum with photon index Gamma = 3.1 +- 0.3 (stat) +- 0.2 (sys) and a flux above 470 GeV of 1.3 +- 0.2 (stat) +- 0.3 (sys) x 10^{-12} cm^{-2} s^{-1}. There "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.0763","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}