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The Quadruple Gravitational Lens PG1115+080: Time Delays and Models
P. L. Schechter, C. D. Bailyn, R. Barr +24
Optical photometry is presented for the quadruple gravitational lens PG1115+080. A preliminary reduction of data taken from November 1995 to June 1996 gives component ``C'' leading…
The Centers of Early-Type Galaxies with HST. IV. Central Parameter Relations
S. M. Faber, Scott Tremaine, Edward A. Ajhar +7
We analyze Hubble Space Telescope surface-brightness profiles of 61 elliptical galaxies and spiral bulges (hot galaxies). Luminous hot galaxies have cuspy cores with steep outer po…
An Optical/X--ray Study of A576, a Galaxy Cluster with a Cold Core
J. Mohr, M. Geller, D. Fabricant +3
We analyze the galaxy population and dynamics of the galaxy cluster Abell 576 using 281 redshifts (230 new), R band CCD galaxy photometry over a 2h^{-1} Mpc by 2h^{-1} Mpc region c…
The Centers of Early-Type Galaxies with HST III: Non-Parametric Recovery of Stellar Luminosity Distributions
Karl Gebhardt, Douglas Richstone, Edward Ajhar +7
We have non-parametrically determined the luminosity density profiles and their logarithmic slopes for 42 early-type galaxies observed with HST. Assuming that the isodensity contou…
The Centers of Early-Type Galaxies with HST II: Empirical Models and Structural Parameters
Y. I. Byun, C. J. Grillmair, S. M. Faber +6
We present a set of structural parameters for the central parts of 57 early-type galaxies observed with the Planetary Camera of the Hubble Space Telescope. These parameters are bas…