414 citations · 609 across the 20 of their papers we have counts for
6 papers · 2 filters
Ultra High Energy Cosmic Rays
R. J. Protheroe, R. W. Clay
Cosmic rays with energies above eV are currently of considerable interest in astrophysics and are to be further studied in a number of projects which are either currently…
Search for TeV gamma-rays from SN 1987A in 2001
R. Enomoto, L. T. Ksenofontov, H. Katagiri +2
We searched for TeV gamma-rays from the remnant of SN 1987A around 5400 days after the supernova. The observations were carried out in 2001, from November 16 to December 11, using…
Evidence of TeV gamma-ray emission from the nearby starburst galaxy NGC 253
C. Itoh, R. Enomoto, S. Yanagita +4
TeV gamma-rays were recently detected from the nearby normal spiral galaxy NGC 253 (Itoh et al., 2002). Observations to detect the Cherenkov light images initiated by gamma-rays fr…
Gamma ray and infrared emission from the M87 jet and torus
A. -C. Donea, R. J. Protheroe
The existence of intrinsic obscuration of Fanaroff-Riley I objects is a controversial topic. M87, the nearest such object, is puzzling in that although it has very massive central…
How relevant is the torus activity/geometry for the TeV gamma-rays emitted in the jet of M87 ?
A. -C. Donea, R. J. Protheroe
Motivated by unification schemes of active galactic nuclei, we review evidence for the existence of a small-scale dust torus in M87, a Fanaroff-Riley Class I radio galaxy. Since th…
The brightness temperature problem in extreme IDV quasars: a model for PKS 0405-385
R. J. Protheroe
I re-examine the brightness temperature problem in PKS 0405-385 which is an extreme intra-day variable radio quasar with an inferred brightness temperature of $\sim 5 \times 10^{14…