154 citations · 296 across the 6 of their papers we have counts for
6 papers
Chandra High-Resolution X-ray Spectroscopy of the Fe K Line in the Seyfert 1 Galaxy NGC 3783
T. Yaqoob, J. N. Reeves, A. Markowitz +2
We report on the results of detailed X-ray spectroscopy of the Fe K region in the Seyfert 1 galaxy NGC 3783 from five ~170 ks observations with the Chandra high energy gratings. Mo…
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 (…
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…
Chandra Grating Observations of AGN
T. Yaqoob, U. Padmanabhan
The highest spectral resolution data for the Fe-K lines in type I AGN, as observed with the Chandra High Energy Grating (HEG), reveal a variety of line shapes. However, the energie…
The Effect of Changes in the ASCA Calibration on the Fe-Kalpha Lines in Active Galaxies
T. Yaqoob, U. Padmanabhan, T. Dotani +1
The ASCA calibration has evolved considerably since launch and indeed, is still evolving. There have been concerns in the literature that changes in the ASCA calibration have resul…
Subtleties in Measuring Iron K Lines in AGN
T. Yaqoob, U. Padmanabhan, T. Dotani +3
Chandra and XMM observations are showing that the Fe-K emission lines in type 1 AGN are composite, in general consisting of a narrow and a broad component. We review the latest Cha…