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Chandra Detection of a TypeII Quasar at z=3.288
Daniel Stern, Edward C. Moran, Alison L. Coil +16
We report on observations of a TypeII quasar at redshift z=3.288, identified as a hard X-ray source in a 185 ks observation with the Chandra X-ray Observatory and as a high-redshif…
Discovery of Reflection Nebulosity Around Five Vega-like Stars
Paul Kalas, James R. Graham, Steven V. W. Beckwith +2
Coronagraphic optical observations of six Vega-like stars reveal reflection nebulosities, five of which were previously unknown. The nebulosities illuminated by HD 4881, HD 23362,…
Surface Brightness Fluctuations of Fornax Cluster Galaxies: Calibration of Infrared SBFs and Evidence for Recent Star Formation
Michael C. Liu, James R. Graham, Stephane Charlot
We have measured K-band surface brightness fluctuations (SBFs) of 19 early-type galaxies in the Fornax cluster. Combining our results with published data, we find the absolute SBF…
Infrared Surface Brightness Fluctuations of the Coma Elliptical NGC 4874 and the Value of the Hubble Constant
Michael C. Liu, James R. Graham
We have used the Keck I Telescope to measure K-band surface brightness fluctuations (SBFs) of NGC 4874, the dominant elliptical galaxy in the Coma cluster. We use deep HST WFPC2 op…
The Altitude of an Infrared Bright Cloud Feature on Neptune from Near-Infrared Spectroscopy
Henry G. Roe, James R. Graham, Ian S. McLean +8
We present 2.03-2.30 micron near-infrared spectroscopy of Neptune taken 1999 June 2 (UT) with the W.M. Keck Observatory's near-infrared spectrometer (NIRSPEC) during the commission…
Shocking Clouds in the Cygnus Loop
N. A. Levenson, James R. Graham
With Hubble Space Telescope Wide-Field Planetary Camera 2 observations of the Cygnus Loop supernova remnant, we examine the interaction of an interstellar cloud with the blast wave…
An Adaptive Optics Survey for Companions to Stars with Extra-Solar Planets
J. P. Lloyd, M. C. Liu, J. R. Graham +12
We have undertaken an adaptive optics (AO) imaging survey of extrasolar planetary systems and stars showing interesting radial velocity trends from high precision radial velocity s…
An Infrared Camera for Leuschner Observatory and the Berkeley Undergraduate Astronomy Lab
James R. Graham, Richard R. Treffers
We describe the design, fabrication, and operation of an infrared camera which is in use at the 30-inch telescope of the Leuschner Observatory. The camera is based on a Rockwell PI…