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Cosmology from Type Ia Supernovae
S. Perlmutter, G. Aldering, S. Deustua +25
This presentation reports on first evidence for a low-mass-density/positive-cosmological-constant universe that will expand forever, based on observations of a set of 40 high-redsh…
Deep Imaging of AXJ2019+112: The Luminosity of a ``Dark Cluster''
Narciso Benitez, Tom Broadhurst, Piero Rosati +4
We detect a distant cluster of galaxies centered on the QSO lens and luminous X-ray source AXJ2019+112, a.k.a. ``The Dark Cluster'' (Hattori et al 1997). Using deep V,I Keck images…
The Rapid Decay of the Optical Emission from GRB 980326 and its Possible Implications
Paul J. Groot, Titus J. Galama, Paul M. Vreeswijk
We report the discovery of the optical counterpart to GRB 980326. Its rapid optical decay can be characterized by a power law with exponent -2.10 +/- 0.13 and a constant underlying…
Image Deconvolution of the Radio Ring PKS 1830-211
F. Courbin, C. Lidman, B. Frye +4
New high quality Keck and ESO images of PKS 1830-211 are presented. Applying a powerful new deconvolution algorithm to these optical and infrared data, both images of the flat spec…
BIMA and Keck Imaging of the Radio Ring PKS 1830-211
B. L. Frye, F. Courbin, T. Broadhurst +5
We discuss BIMA (Berkeley Illinois Maryland Association) data and present new high quality optical and near-IR Keck images of the bright radio ring PKS 1830-211. Applying a powerfu…