361 citations · 8.4k across the 127 of their papers we have counts for
10 papers · 2 filters
High-resolution X-ray spectroscopy of the Seyfert 2 galaxy Circinus with Chandra
R. M. Sambruna, H. Netzer, S. Kaspi +5
Results from a 60 ks Chandra HETGS observation of the nearby Seyfert 2 Circinus are presented. The spectrum shows a wealth of emission lines at both soft and hard X-rays, including…
X-ray imaging of the Seyfert 2 galaxy Circinus with Chandra
R. M. Sambruna, W. N. Brandt, G. Chartas +5
We present results from the zeroth-order imaging of a Chandra HETGS observation of the nearby Seyfert 2 galaxy Circinus. Twelve X-ray sources were detected in the ACIS-S image of t…
The X-Ray Jet of PKS 0637-752: Inverse Compton Radiation from the Cosmic Microwave Background ?
F. Tavecchio, L. Maraschi R. M. Sambruna, C. M. Urry
We propose that the X-ray emission detected by Chandra from the 100-kiloparsec-scale jet of PKS 0637-752 is produced through inverse Compton scattering of the Cosmic Microwave Back…
BeppoSAX Observations of Markarian 501 in June 1999
E. Pian, L. Chiappetti, P. Giommi +19
We present the preliminary results of a long BeppoSAX observation of the BL Lac object Mkn501 carried out in June 1999. The source was fainter than found during the BeppoSAX pointi…
Discovery of Narrow X-ray Absorption Lines from NGC 3783 with the Chandra HETGS
Shai Kaspi, W. N. Brandt, Hagai Netzer +4
We present the first grating-resolution X-ray spectra of the Seyfert 1 galaxy NGC 3783, obtained with the High Energy Transmission Grating Spectrometer on the Chandra X-ray Observa…
A Rapid X-ray Flare from Markarian 501
Michael Catanese, Rita M. Sambruna
We present X-ray observations of the BL Lacertae (BL Lac) object Markarian 501 (Mrk 501), taken with the Rossi X-ray Timing Explorer in 1998 May as part of a multi-wavelength campa…
Gamma-loud quasars: a view with BeppoSAX
F. Tavecchio, L. Maraschi, G. Ghisellini +12
We present SAX observations of the -ray emitting quasars 0836+710, 1510-089 and 2230+114. All the objects have been detected in the PDS up to 100 keV and have extremely f…
Hard X-Ray Spectra of Broad-Line Radio Galaxies from the Rossi X-Ray Timing Explorer
M. Eracleous, R. M. Sambruna, R. F. Mushotzky
We present the results of hard-X-ray observations of four broad-line radio galaxies (BLRGs) with the Rossi X-Ray Timing Explorer (RXTE). The original motivation behind the observat…
Correlated intense X-ray and TeV activity of Mrk~501 in 1998 June
Rita M. Sambruna
We present exactly simultaneous X-ray and TeV monitoring with {\it RXTE} and HEGRA of the TeV blazar Mrk 501 during 15 days in 1998 June. After an initial period of very low flux a…
Chandra uncovers a hidden Low-Luminosity AGN in the radio galaxy Hydra~A (3C~218)
R. M. Sambruna, G. Chartas, M. Eracleous +2
We report the detection with Chandra of a Low-Luminosity AGN (LLAGN) in the Low Ionization Emission Line Region (LINER) hosted by Hydra A, a nearby (z=0.0537) powerful FRI radio ga…