VERITAS OBSERVATIONS OF THE BL LAC OBJECT 1ES 1218+304
- Acciari, V. A.
- Aliu, E.
- Arlen, T.
- Beilicke, M.
- Benbow, W.
- Bradbury, S. M.
- Buckley, J. H.
- Bugaev, V.
- Butt, Y.
- Byrum, K. L.
- Celik, O.
- Cesarini, A.
- Ciupik, L.
- Chow, Y. C. K.
- Cogan, P.
- Colin, P.
- Cui, W.
- Daniel, M. K.
- Ergin, Tülün
- Falcone, A. D.
- Fegan, S. J.
- Finley, J. P.
- Fortin, P.
- Fortson, L. F.
- Furniss, A.
- Gillanders, G. H.
- Grube, J.
- Guenette, R.
- Gyuk, G.
- Hanna, D.
- Hays, E.
- Holder, J.
- Horan, D.
- Hui, C. M.
- Humensky, T. B.
- Imran, A.
- Kaaret, P.
- Karlsson, N.
- Kertzman, M.
- Kieda, D. B.
- Kildea, J.
- Konopelko, A.
- Krawczynski, H.
- Krennrich, F.
- Lang, M. J.
- LeBohec, S.
- Maier, G.
- McCann, A.
- McCutcheon, M.
- Moriarty, P.
- Mukherjee, R.
- Nagai, T.
- Niemiec, J.
- Ong, R. A.
- Pandel, D.
- Perkins, J. S.
- Pohl, M.
- Quinn, J.
- Ragan, K.
- Reyes, L. C.
- Reynolds, P. T.
- Rose, H. J.
- Schroedter, M.
- Sembroski, G. H.
- Smith, A. W.
- Steele, D.
- Swordy, S. P.
- Toner, J. A.
- Valcarcel, L.
- Vassiliev, V. V.
- Wagner, R.
- Wakely, S. P.
- Ward, J. E.
- Weekes, T. C.
- Weinstein, A.
- White, R. J.
- Williams, D. A.
- Wissel, S. A.
- Wood, M.
- Zitzer, B.
DOIAbstract
The VERITAS collaboration reports the detection of very-high-energy gamma-ray emission from the high-frequency-peaked BL Lac object 1ES 1218+304 located at a redshift of z = 0.182. A gamma-ray signal was detected with a statistical significance of 10.4 standard deviations (10.4 sigma) for the observations taken during the first three months of 2007, confirming the discovery of this object made by the MAGIC collaboration. The photon spectrum between similar to 160 GeV and similar to 1.8 TeV is well described by a power law with an index of Gamma = 3.08 +/- 0.34(stat) +/- 0.2(sys). The integral flux is Phi (E > 200 GeV) = (12.2 +/- 2.6) x 10(-12) cm(-2) s(-1), which corresponds to similar to 6% of that of the Crab Nebula. The light curve does...
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