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Intensive HST, RXTE and ASCA Monitoring of NGC 3516: Evidence Against Thermal Reprocessing
Rick Edelson, Anuradha Koratkar, Kirpal Nandra +10
During 1998 April 13-16, NGC 3516 was monitored almost continuously with HST for 10.3 hr in the UV and 2.8 d in the optical, and simultaneous RXTE and ASCA monitoring covered the s…
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 Possible 100-day X-ray-to-Optical Lag in the Variations of the Seyfert 1 Nucleus NGC 3516
Dan Maoz, Rick Edelson, Kirpal Nandra
We present optical broadband (B and R) observations of the Seyfert 1 nucleus NGC 3516, obtained at Wise Observatory from 1997 March to 1998 September, contemporaneously with the X-…
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…
X-ray dependencies on luminosity in AGN
K. Nandra
Several X-ray properties of active galactic nuclei depend, or appear to depend, on their luminosity. It has long been suggested that alpha o-x, the X-ray ``loudness'' decreases wit…