Abstract
We present the first strong detection of very high energy gamma-rays from the close (z=0.048) X-ray-selected BL Lacertae object 1ES 1959+650. Observations were made with the Whipple 10 m telescope on Mount Hopkins, Arizona, using the atmospheric Cerenkov imaging technique. The flux between 2002 May and July was highly variable, with a mean of 0.64+ -0.03 times the steady flux from the Crab Nebula and reaching a maximum of 5 crab, with variability on timescales as short as 7 hr.
| Original language | English (Ireland) |
|---|---|
| Number of pages | 3 |
| Journal | Astrophysical Journal |
| Volume | 583 |
| Publication status | Published - 1 Jan 2003 |
Authors (Note for portal: view the doc link for the full list of authors)
- Authors
- Holder, J;Bond, IH;Boyle, PJ;Bradbury, SM;Buckley, JH;Carter-Lewis, DA;Cui, W;Dowdall, C;Duke, C;Perez, ID;Falcone, A;Fegan, DJ;Fegan, SJ;Finley, JP;Fortson, L;Gaidos, JA;Gibbs, K;Gammell, S;Hall, J;Hall, TA;Hillas, AM;Horan, D;Jordan, M;Kertzman, M;Kieda, D;Kildea, J;Knapp, J;Kosack, K;Krawczynski, H;Krennrich, F;LeBohec, S;Linton, ET;Lloyd-Evans, J;Moriarty, P;Muller, D;Nagai, TN;Ong, R;Page, M;Pallassini, R;Petry, D;Power-Mooney, B;Quinn, J;Rebillot, P;Reynolds, PT;Rose, HJ;Schroedter, M;Sembroski, GH;Swordy, SP;Vassiliev, VV;Wakely, SP;Walker, G;Weekes, TC