658 citations · 9k across the 163 of their papers we have counts for
6 papers · 1 filter
The Cores of the Fe K Lines in Seyfert I Galaxies Observed by the Chandra High Energy Grating
Tahir Yaqoob, Urmila Padmanabhan
We report on the results of 18 observations of the core, or peak, of the Fe K emission line at keV in 15 Seyfert I galaxies using the {\it Chandra} High Energy Grating (…
The XMM-Newton Iron Line Profile of NGC 3783
J. N Reeves, K. Nandra, I. M. George +3
We report on observations of the iron K line in the nearby Seyfert 1 galaxy, NGC 3783, obtained in a long, 2 orbit (240 ks) XMM-Newton observation. The line profile obtained exhibi…
A warm hot intergalactic medium towards 3C 120?
B. McKernan, T. Yaqoob, R. Mushotzky +2
We observed the Seyfert I active galaxy/broad line radio galaxy 3C120 with the Chandra high energy transmission gratings and present an analysis of the soft X-ray spectrum. We iden…
Fe XXV and Fe XXVI Diagnostics of the Black Hole and Accretion Disk in Active Galaxies: Chandra Time-Resolved Spectroscopy of NGC 7314
T. Yaqoob, I. M. George, T. R. Kallman +3
We report the detection of Fe XXV and Fe XXVI emission lines from a Chandra HETGS observation of the Seyfert~1 galaxy NGC 7314, made simultaneously with RXTE. The lines are re…
A Puzzling X-Ray Source Found in the chandra Deep Field South
J. Wang, T. Yaqoob, G. Szokoly +9
In this letter we report the detection of an extremely strong X-ray emission line in the 940ks chandra ACIS-I spectrum of CXO CDFS J033225.3-274219. The source was identified as a…
Simultaneous UV and X-ray Spectroscopy of the Seyfert 1 Galaxy NGC 5548. I. Physical Conditions in the UV Absorbers
D. M. Crenshaw, S. B. Kraemer, J. R. Gabel +9
We present new UV spectra of the nucleus of the Seyfert 1 galaxy NGC 5548, which we obtained with the Space Telescope Imaging Spectrograph at high spectral resolution, in conjuncti…