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Variability of the X-ray P Cygni Line Profiles from Circinus X-1 Near Zero Phase
N. S. Schulz, W. N. Brandt
The luminous X-ray binary Circinus X-1 has been observed twice near zero orbital phase using the High-Energy Transmission Grating Spectrometer (HETGS) onboard Chandra. The source w…
Highly Ionized Absorption in the X-ray Spectrum of Cyg X-1
H. L. Marshall, N. S. Schulz, T. Fang +4
Using the Chandra High Energy Transmission Grating Spectrometer (HETGS), we have found significant absorption features in the X-ray spectrum of Cyg X-1 taken in the continuous cloc…
Evidence for Accretion: High-Resolution X-ray Spectroscopy of the Classical T Tauri Star TW Hydrae
Joel H. Kastner, David P. Huenemoerder, Norbert S. Schulz +2
We present high resolution X-ray spectra of the X-ray bright classical T Tauri star, TW Hydrae, covering the wavelength range of 1.5-25 AA. The differential emission measure derive…
The Chandra High Energy Transmission Grating Spectrometer probes the dusty warm absorber in the Seyfert 1 galaxy MCG--6-30-15
J. C. Lee, C. R. Canizares, H. L. Marshall +4
The Chandra HETGS spectra of the Seyfert 1 galaxy MCG--6-30-15 show numerous narrow, unresolved (FWHM < 200 km/s) absorption lines from a wide range of ionization states of N, O, M…
The First High Resolution X-ray Spectrum of Cyg X-1: Soft X-Ray Ionization and Absorption
N. S. Schulz, W. Cui, C. R. Canizares +4
We observed the black hole candidate Cyg X-1 for 15 ks with the High-Energy Transmission Grating Spectrometer aboard the CHANDRA X-ray Observatory. The source was observed during a…
Double-Peaked X-Ray Lines from the Oxygen/Neon-Rich Accretion Disk in 4U1626-67
Norbert S. Schulz, Deepto Chakrabarty, Herman L. Marshall +3
We report on a 39 ks observation of the 7.7-s low-mass X-ray binary pulsar 4U1626-67 with the High Energy Transmission Grating Spectrometer (HETGS) on the Chandra X-Ray Observatory…
X-Ray Spectroscopy of II Pegasi: Coronal Temperature Structure, Abundances, and Variability
David P. Huenemoerder, Claude R. Canizares, Norbert S. Schulz
We have obtained high resolution X-ray spectra of the coronally active binary, II Pegasi (HD 224085), covering the wavelength range of 1.5-25 Angstroms. For the first half of our 4…
Spectral Line Imaging Observations of 1E0102.2-7219
D. S. Davis, K. A. Flanagan, J. C. Houck +5
E0102-72 is the second brightest X-ray source in the Small Magellanic Cloud and the brightest supernova remnant in the SMC. We observed this SNR for ~140 ksec with the High Energy…