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Complex resonance absorption structure in the X-ray spectrum of IRAS13349+2438
M. Sako, S. M. Kahn, E. Behar +8
The luminous infrared-loud quasar IRAS 13349+2438 was observed with the XMM-Newton Observatory as part of the Performance Verification program. The spectrum obtained by the Reflect…
The Chandra High Energy Transmission Grating Observation of an X-ray Ionization Cone in Markarian 3
Masao Sako, Steven M. Kahn, Frits Paerels +1
We present a preliminary analysis of the first high-resolution X-ray spectrum of a Seyfert 2 galaxy, Mkn 3, obtained with the High Energy Transmission Grating Spectrometer onboard…
The X-Ray Photoionized Wind in Cen X-3/V779 Cen
Patrick S. Wojdowski, Duane A. Liedahl, Masao Sako
We analyze the ASCA spectrum of the Cen X-3 X-ray binary system in eclipse using atomic models appropriate to recombination-dominated level population kinetics in an overionized pl…
The Physical Conditions of the X-ray Emission Line Regions in the Circinus Galaxy
Masao Sako, Steven M. Kahn, Frits Paerels +1
We present a detailed X-ray spectral analysis of the Circinus Galaxy using archival data obtained with the ASCA satellite. The spectrum shows numerous emission lines in the soft X-…
X-ray Spectral Diagnostics of Gamma-Ray Burst Environments
Frits Paerels, Erik Kuulkers, John Heise +1
Recently, the detection of discrete features in the X-ray afterglow spectra of GRB970508 and GRB970828 was reported. The most natural interpretation of these features is that they…
X-ray absorption lines in the Seyfert 1 galaxy NGC 5548 discovered with Chandra-LETGS
J. S. Kaastra, R. Mewe, D. A. Liedahl +2
We present for the first time a high-resolution X-ray spectrum of a Seyfert galaxy. The Chandra-LETGS spectrum of NGC 5548 shows strong, narrow absorption lines from highly ionised…