8 papers
A new radio double lens from CLASS: B1127+385
L. V. E. Koopmans, A. G. de Bruyn, D. R. Marlow +9
We present the discovery of a new gravitational lens system with two compact radio images separated by 0.701+-0.001 arcsec. The lens system was discovered in the Cosmic Lens All Sk…
B2045+265: A New Four-Image Gravitational Lens from CLASS
C. D. Fassnacht, R. D. Blandford, J. G. Cohen +14
We have discovered a new gravitational lens in the Cosmic Lens All-Sky Survey (CLASS). B2045+265 is a four-image system with a maximum separation of 1.9 arcsec. A fifth radio compo…
The complex gravitational lens system B1933+503
C. M. Sykes, I. W. A. Browne, N. J. Jackson +15
We report the discovery of the most complex arcsec-scale radio gravitational lens system yet known. B1933+503 was found during the course of the CLASS survey and MERLIN and VLA rad…
Temperature and Kinematics of CIV Absorption Systems
M. Rauch, W. L. W. Sargent, D. S. Womble +1
We use Keck HIRES spectra of three intermediate redshift QSOs to study the physical state and kinematics of the individual components of CIV selected heavy element absorption syste…
The Lyman-alpha Forest at z~4: Keck HIRES Observations of Q 0000-26
Limin Lu, Wallace L. W. Sargent, Donna S. Womble +1
This paper describes a study of the Lyman-alpha forest absorption clouds along the quasar sightline Q0000-26 (zem=4.1). The spectrum was obtained with the High Resolution Spectrome…
Limits to the 1/4 keV Extragalactic X-ray Background
Wei Cui, Wilton T. Sanders, Dan McCammon +2
We observed several nearby face-on spiral galaxies with the ROSAT PSPC. The apparent deficiency in soft X-ray surface brightness observed at the outer portion of their disks is con…