7 papers · 1 filter
INTEGRAL and Swift Observations of Blazars in Outburst
Elena Pian, Luigi Foschini, Gabriele Ghisellini
The blazars 3C 454.3, PKS 0537-441 and PKS 2155-304 are traditionally known to be among the most active sources of this class. They emit at all frequencies, up to the gamma-rays, a…
The hard X-ray properties of the Seyfert nucleus in NGC 1365
G. Risaliti, R. Maiolino, L. Bassani
We present BeppoSAX observations of the Seyfert 1.8 galaxy NGC1365 in the 0.1--100 keV range. The source was 6 times brighter than during an ASCA observation 3 years earlier. The 4…
The complex 0.1-200 keV spectrum of the Seyfert 1 Galaxy NGC4593
M. Guainazzi, G. C. Perola, G. Matt +5
We report on the first observation of the Seyfert 1 galaxy NGC4593 in the 0.1-200 keV band, performed with the BeppoSAX observatory. Its spectral components are for the first time…
The quiescent state broadband X-ray spectrum and variability of Mkn421
M. Guainazzi, G. Vacanti, A. Malizia +3
The BL Lac object Mkn~421 was observed three times by the X-ray observatory BeppoSAX in consecutive days during 1997 April and May. The source was in a quiescent state, with an ave…
The Comptonized X-ray source X1724-308 in the globular cluster Terzan 2
M. Guainazzi, A. N. Parmar, A. Segreto +3
We report on the BeppoSAX observation of the X-ray source X1724-308 in the globular cluster Terzan 2. The broadband spectrum can be described as the superposition of a power-law wi…
High resolution imaging of the X-ray afterglow of GRB970228 with ROSAT
F. Frontera, J. Greiner, L. A. Antonelli +6
We report results of a ROSAT High-Resolution Imager (HRI) observation of the X-ray error box given by the BeppoSAX Wide Field Camera for the gamma-ray burst that occurred on 1997 F…