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Search Techniques for Distant Galaxies
Daniel Stern, Hyron Spinrad
How and when do galaxies form? Studies of the microwave background radiation reveal that the Universe is spectacularly homogenous at redshift z~1000. Observations of the local Univ…
A Serendipitous Search for Hy-Redshift Ly Emission: A Case Study of Two Sources at
Curtis Manning, Daniel Stern, Hyron Spinrad +1
In the course of our on-going search for serendipitous high-redshift LyA emission in deep archival Keck spectra, we discovered two LyA emission line candidates in a moderate disper…
NICMOS Imaging of the Dusty Microjansky Radio Source VLA J123642+621331 at z = 4.424
I. Waddington, R. A. Windhorst, S. H. Cohen +3
We present the discovery of a radio galaxy at a likely redshift of z = 4.424 in one of the flanking fields of the Hubble Deep Field. Radio observations with the VLA and MERLIN cent…
Resolving the Stellar Populations in a z=4 Lensed Galaxy
Andrew J. Bunker, Leonidas A. Moustakas, Marc Davis
We present deep near-infrared Keck/NIRC imaging of a recently-discovered z=4.04 galaxy (Frye & Broadhurst 1998). This is lensed by the rich foreground cluster Abell~2390 (z~0.23) i…
NICMOS Imaging of High-Redshift Radio Galaxies
A. Zirm, A. Dey, M. Dickinson +6
We have obtained near-infrared (1.6 micron) images of 11 powerful 3CR radio galaxies at redshifts 0.8 < z < 1.8 using NICMOS on board HST. The high angular resolution permits a det…
The unusual afterglow of GRB 980326: evidence for the gamma-ray burst/supernova connection
J. S. Bloom, S. R. Kulkarni, S. G. Djorgovski +19
Cosmic gamma-ray bursts (GRBs) have been firmly established as one of the most powerful phenomena in the Universe, releasing electromagnetic energy approaching the rest-mass energy…
An X-ray Selected Galaxy Cluster at z=1.26
Piero Rosati, S. A. Stanford, Peter R. Eisenhardt +4
We report the discovery of an X-ray luminous galaxy cluster at z=1.26. RXJ0848.9+4452 was selected as an X-ray cluster candidate in the ROSAT Deep Cluster Survey, on the basis of i…