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10 papers · 2 filters
New High-Redshift Radio Galaxies from the MIT-Green Bank Catalog
Daniel Stern, Arjun Dey, Hyron Spinrad +4
We present optical identifications and redshifts for seventeen new high-redshift radio sources. Fifteen of these sources are radio galaxies; the remaining two are high-redshift, st…
BVRI Light Curves for 22 Type Ia Supernovae
Adam G. Riess, Robert P. Kirshner, Brian P. Schmidt +6
We present 1210 Johnson/Cousins B,V,R, and I photometric observations of 22 recent type Ia supernovae (SNe Ia): SN 1993ac, SN 1993ae, SN 1994M, SN 1994S, SN 1994T, SN 1994Q, SN 199…
Induced star formation and morphological evolution in very high redshift radio galaxies
Wil van Breugel, A. Stanford, A. Dey +5
Near-infrared, sub-arcsecond seeing images obtained with the W. M. Keck I Telescope of show strong evolution at rest--frame optical} wavelengths in the morphologies of high redshif…
A z=5.34 Galaxy Pair in the Hubble Deep Field
Hyron Spinrad, Daniel Stern, Andrew Bunker +5
We present spectrograms of the faint V-drop (V(606) = 28.1, I(814) = 25.6) galaxy pair HDF3-951.1 and HDF3-951.2 obtained at the Keck II Telescope. Fernandez-Soto, Lanzetta, & Yahi…
A Galaxy at z=5.34
Arjun Dey, Hyron Spinrad, Daniel Stern +2
We report the discovery of Lyman alpha emission from a galaxy at z=5.34, the first object at z>5 with a spectroscopically confirmed redshift. The faint continuum emission (m(8000A)…
The Performance and Scientific Rationale for an IR Imaging Fourier Transform Spectrograph on a Large Space Telescope
James R. Graham, Mark Abrams, C. Bennett +5
We describe a concept for an imaging spectrograph for a large orbiting observatory such as NASA's proposed Next Generation Space Telescope (NGST) based on an imaging Fourier transf…
The Early History of Powerful Radio Galaxies
Arjun Dey
I briefly review the current status of observations of AGN-powered UV/optical light, starlight, dust and outflow phenomena in high-redshift powerful radio galaxies. The existing da…
Spectroscopy of z>3 Lyman-limit Galaxies
Hyron Spinrad, Arjun Dey, Daniel Stern +1
We discuss the spectral character of Lyman-limit-selected, star-forming galaxies at z>3. The rest-frame UV spectra of these faint galaxies may show Ly-alpha in either absorption or…
Spectropolarimetry of 3CR 68.1: A Highly Inclined Quasar
M. S. Brotherton, Beverley J. Wills, Arjun Dey +2
We present Keck spectropolarimetry of the highly polarized radio-loud quasar 3CR 68.1 (z=1.228, V=19). The polarization increases from 5 in the red (4000 A rest-frame) to >10% in t…
Old high-redshift galaxies and primordial density fluctuation spectra
J. A. Peacock, R. Jimenez, J. S. Dunlop +5
We have discovered a population of extremely red galaxies at which have apparent stellar ages of $\gs 3$ Gyr, based on detailed spectroscopy in the rest-frame ultravi…