56 citations · 209 across the 8 of their papers we have counts for
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The hard synchrotron X-ray spectrum of the TeV BL Lac 1ES 1426+428
A. Wolter, V. Beckmann, G. Ghisellini +5
We have observed 1ES 1426+428 with INTEGRAL detecting it up to 150 keV. The spectrum is hard, confirming that this source is an extreme BL Lac object, with a synchrotron comp…
The nature of the hard state of Cygnus X-3
L. Hjalmarsdotter, A. A. Zdziarski, S. Larsson +4
The X-ray binary Cygnus X-3 is a highly variable X-ray source that displays a wide range of observed spectral states. One of the main states is significantly harder than the others…
The 1 keV to 200 keV X-ray Spectrum of NGC 2992 and NGC 3081
Volker Beckmann, Neil Gehrels, Jack Tueller
The Seyfert 2 galaxies NGC 2992 and NGC 3081 have been observed by INTEGRAL and Swift. We report about the results and the comparison of the spectrum above 10 keV based on INTEGRAL…
The High Energy Spectrum of NGC 4151
V. Beckmann, C. R. Shrader, N. Gehrels +5
We present the first INTEGRAL observations of the type 1.5 Seyfert galaxy NGC 4151. Combining several INTEGRAL observations performed during 2003, totaling about 400 ks of exposure…