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- Center for Astrophysics Harvard & SmithsonianUS68 papers
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5 papers · 2 filters
Quasars and Ultraluminous Infrared Galaxies: At the Limit?
K. K. McLeod, G. H. Rieke, L. J. Storrie-Lombardi
We have detected the host galaxies of 16 nearby, radio-quiet quasars using images obtained with the Near-Infrared Camera and Multi-Object Spectrometer (NICMOS). We confirm that the…
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…
The U.S. ISO Key Project on Quasars
Eric Hooper, Belinda Wilkes, Kim McLeod +5
Observations for the U.S. key project on quasars using ISO were completed in April when the satellite's cryogen supply expired. This proceeding presents an update of the project, i…
Q1208+1011: Search for the lensing galaxy
Aneta Siemiginowska, Jill Bechtold, Thomas L. Aldcroft +2
We present a high-resolution spectrum of the high redshift, lensed quasar Q1208+1101, obtained with the echellette spectrograph on the Multiple Mirror Telescope. We examine the new…
Ω_0 from the Apparent Evolution of Gas Fractions in Rich Clusters of Galaxies
Rebecca Danos, Ue-Li Pen
We apply a unique gas fraction estimator to published X-ray cluster properties and we compare the derived gas fractions of observed clusters to simulated ones. The observations are…