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24 papers · 2 filters
The FIRST Bright Quasar Survey. II. 60 Nights and 1200 Spectra Later
R. L. White, R. H. Becker, M. D. Gregg +11
We have used the VLA FIRST survey and the APM catalog of the POSS-I plates as the basis for constructing a new radio-selected sample of optically bright quasars. This is the first…
The Discovery of a Companion to the Very Cool Dwarf Gl~569~B with the Keck Adaptive Optics Facility
E. L. Martín, C. D. Koresko, S. R. Kulkarni +2
We report observations obtained with the Keck adaptive optics facility of the nearby (d=9.8 pc) binary Gl~569. The system was known to be composed of a cool primary (dM2) and a ver…
The Radio Afterglow and the Host Galaxy of the X-Ray Rich GRB 981226
D. A. Frail, S. R. Kulkarni, J. S. Bloom +9
We report the discovery of a radio transient VLA 232937.2-235553, coincident with the proposed X-ray afterglow for the gamma-ray burst GRB 981226. This GRB has the highest ratio of…
Limits on the Gunn-Peterson Effect at z = 5
Antoinette Songaila, Esther M. Hu, Lennox L. Cowie +1
We report new limits on the Gunn-Peterson effect at a redshift near 5 using spectroscopic observations of the z = 5 Sloan Digital Sky Survey quasar, J033829.31+002156.3, made with…
Discovery of the Optical Transient of the Gamma Ray Burst 990308
Bradley E. Schaefer, J. A. Snyder, J. Hernandez +53
The optical transient of the faint Gamma Ray Burst 990308 was detected by the QUEST camera on the Venezuelan 1-m Schmidt telescope starting 3.28 hours after the burst. Our photomet…
3C 48: Stellar Populations and the Kinematics of Stars and Gas in the Host Galaxy
Gabriela Canalizo, Alan Stockton
We present deep Keck LRIS spectroscopy of the host galaxy of 3C 48. Our observations at various slit positions sample the different luminous components near the quasar, including t…