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X-ray Observations of Optically-Selected, Radio-Quiet Quasars I: The ASCA results
I. M. George, T. J. Turner, T. Yaqoob +5
We present the result of 27 ASCA observations of 26 radio-quiet quasars (RQQs) from the PG survey. All the RQQs were detected except 2 BALQSOs. We find the variability characterist…
A Highly Doppler Blueshifted Fe-K Emission Line in the High-Redshift QSO PKS 2149-306
T. Yaqoob, I. M. George, K. Nandra +3
We report the results from an \asca observation of the QSO PKS 2149-306 (z=2.345). We detect an emission line centered at keV in the quasar frame. Line emission at this e…
The properties of the relativistic iron K-line in NGC 3516
K. Nandra, I. M. George, R. F. Mushotzky +2
We present an analysis of the relativistic iron K-alpha line in the Seyfert 1 galaxy NGC 3516, based on a continuous, five-day ASCA observation. The broad profile which has been fo…
Short-timescale Variability in the Broadband Emission of the Blazars Mkn421 and Mkn501
M. J. Carson, B. McKernan, T. Yaqoob +1
We analyse ASCA x-ray data and Whipple γ-ray data from the blazars Mkn421 and Mkn501 for short-timescale variability. We find no evidence for statistically significant (>3σ) variab…
X-ray Properties of the Weak Seyfert 1 Nucleus in NGC 4639
Luis C. Ho, Andrew Ptak, Yuichi Terashima +4
We obtained observations of NGC 4639 with ASCA in order to investigate its mildly active Seyfert 1 nucleus at hard X-ray energies. Koratkar et al. (1995) have previously shown that…