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 | 4 |
| 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