activity
19942024
most citedThe Soft X-Ray Properties of a Complete Sample of Optically Selected Quasars II. Final Results

552 citations · 16.5k across the 268 of their papers we have counts for

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Showing 1999Show all

5 papers · 1 filter

astro-ph1999★ 9 cited

EXIST: A High Sensitivity Hard X-ray Imaging Sky Survey Mission for ISS

J. Grindlay, L. Bildsten, D. Chakrabarty +12

A deep all-sky imaging hard x-ray survey and wide-field monitor is needed to extend soft (ROSAT) and medium (ABRIXAS2) x-ray surveys into the 10-100 keV band (and beyond) at compar…

astro-ph1999

The ISO/NASA Key Project on AGN Spectral Energy Distributions (Characteristics of the ISO Data)

Eric J. Hooper, Belinda J. Wilkes, Kim K. McLeod +5

The U.S. ISO Key Project on quasar spectral energy distributions seeks to better understand the very broad-band emission features of quasars from radio to X-rays. A key element of…

astro-ph1999

The Far-infrared Continuum of Quasars

Belinda J. Wilkes, Eric J. Hooper, Kim K. McLeod +5

ISO provides a key new far-infrared window through which to observe the multi-wavelength spectral energy distributions (SEDs) of quasars and active galactic nuclei (AGN). It allows…

astro-ph1999★ 3 cited

The BeppoSAX view of the hard X-ray background

A. Comastri, F. Fiore, P. Giommi +5

First results on a medium-deep X-ray survey in the "new" 5-10 keV band carried out with the MECS detectors onboard BeppoSAX are presented. The High Energy Llarge Area Survey (HELLA…

astro-ph1999★ 41 cited

Multiple Velocity Components in the CIV Absorption Line of NGC5548

Smita Mathur, Martin Elvis, Belinda Wilkes

We have observed the much studied Seyfert 1 galaxy NGC5548 with the GHRS spectrometer on HST. Our 14ksec observation covers the CIV emission line at a resolution of >20,000. Our pu…