445 citations · 1.5k across the 10 of their papers we have counts for
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Cosmic Gravitational Shear from the HST Medium Deep Survey
Stefano Casertano, Kavan U. Ratnatunga, Richard E. Griffiths
We present a measurement of cosmic shear on scales ranging from $ 10\arcsec $ to $ 2\arcmin $ in 347 WFPC2 images of random fields. Our result is based on shapes measured via image…
Iron K features in the hard X-ray XMM-Newton spectrum of NGC 4151
N. J. Schurch, R. S. Warwick, R. E. Griffiths +1
Recent XMM-Newton observations have measured the hard (2.5-12 keV) X-ray spectrum of the well-known Seyfert galaxy NGC 4151 with a signal-to-noise unprecedented for this source. We…
XMM-Newton observations of Broad FeKalpha emission from a Seyfert 1.9 galaxy MCG-5-23-16
G. C. Dewangan, R. E. Griffiths, N. J. Schurch
XMM-Newton observations of the bright Seyfert 1.9 galaxy MCG-5-23-16 have revealed a broad FeKalpha emission line which is nearly symmetric in contrast to the broad and red-shifted…
Chandra ACIS-S Observations of Three Quasars with Low-Redshift Damped Ly-alpha Absorption: Constraints on the Cosmic Neutral-Gas-Phase Metallicity at Redshift z \approx 0.4
David A. Turnshek, Sandhya M. Rao, Andrew F. Ptak +2
Chandra X-Ray Observatory (CXO) ACIS-S spectra of three quasars which lie behind three foreground damped Lyman alpha (DLA) absorbers are analyzed in order to attempt to determine t…