The initial mass function of early-type galaxies (2009)
Treu, T., Auger, M. W., Koopmans, L. V. E., Gavazzi, R., Marshall, P. J., Bolton, A. S.
We determine an absolute calibration of the initial mass function (IMF) of early-type galaxies, by studying a sample of 56 gravitational lenses identified by the SLACS Survey. Under the assumption of...
The Sloan Lens ACS Survey. IX. Colors, Lensing and Stellar Masses of Early-type Galaxies (2009)
Auger, M. W., Treu, T., Bolton, A. S., Gavazzi, R., Koopmans, L. V. E., Marshall, P. J., ...
We present the current photometric dataset for the Sloan Lens ACS (SLACS) Survey, including HST photometry from ACS, WFPC2, and NICMOS. These data have enabled the confirmation of an additional 15...
Suyu, S. H., Marshall, P. J., Auger, M. W., Hilbert, S., Blandford, R. D., Koopmans, L. V. E., ...
Strong gravitational lens systems with measured time delays between the multiple images provide a method for measuring the ``time-delay distance'' to the lens, and thus the Hubble constant. We...
Can dry merging explain the size evolution of early-type galaxies? (2009)
Nipoti, C., Treu, T., Auger, M. W., Bolton, A. S.
The characteristic size of early-type galaxies (ETGs) of given stellar mass is observed to increase significantly with cosmic time, from redshift z>2 to the present. A popular explanation for this...
McKean, J. P., Auger, M. W., Koopmans, L. V. E., Vegetti, S., Czoske, O., Fassnacht, C. D., ...
The gravitational lens system CLASS B2108+213 has two radio-loud lensed images separated by 4.56 arcsec. The relatively large image separation implies that the lensing is caused by a group of...
Koopmans, L. V. E., Bolton, A., Treu, T., Czoske, O., Auger, M. W., Barnabe, M., ...
Based on 58 SLACS strong-lens early-type galaxies with direct total-mass and stellar-velocity dispersion measurements, we find that inside one effective radius massive elliptical galaxies with M_eff...
Low-Energy Astrophysics: Stimulating the Reduction of Energy Consumption in the Next Decade (2009)
Marshall, P. J., Bennert, N., Rykoff, E. S., Shen, K. J., Steinfadt, J. D. R., Fregeau, J., ...
In this paper we address the consumption of energy by astronomers while performing their professional duties. Although we find that astronomy uses a negligible fraction of the US energy budget, the...
Perley, D. A., Li, W., Chornock, R., Prochaska, J. X., Butler, N. R., Chandra, P., ...
The optical afterglow of long-duration GRB 071003 is among the brightest yet to be detected from any GRB, with R ≈ 12 mag in KAIT observations starting 42 s after the GRB trigger, including...
Perley, D. A., Li, W., Chornock, R., Prochaska, J. X., Butler, N. R., Chandra, P., ...
The optical afterglow of long-duration GRB 071003 is among the brightest yet to be detected from any GRB, with R ~ 12 mag in KAIT observations starting 42 s after the GRB trigger, including filtered...
Lens galaxy properties of SBS 1520+530 : insights from Keck spectroscopy and AO imaging (2008)
Auger, M. W., Fassnacht, C. D., Wong, K. C., Thompson, D., Matthews, K., Soifer, B. T.
We report on an investigation of the SBS 1520+530 gravitational lens system. We have used archival Hubble Space Telescope (HST) imaging, Keck spectroscopic data, and Keck adaptive optics (AO) imaging...
The Environments of Low and High Luminosity Radio Galaxies at Moderate Redshifts (2008)
Auger, M. W., Becker, R. H., Fassnacht, C. D.
In the local Universe, high-power radio galaxies live in lower density environments than low-luminosity radio galaxies. If this trend continues to higher redshifts, powerful radio galaxies would...
Fassnacht, C. D., Kocevski, D. D., Auger, M. W., Lubin, L. M., Neureuther, J. L., Jeltema, T. E., ...
We present results from a systematic investigation of the X-ray properties of a sample of moderate redshift (0.3
Lens Galaxy Properties of SBS1520+530: Insights from Keck Spectroscopy and AO Imaging (2007)
Auger, M. W., Fassnacht, C. D., Wong, K. C., Thomspon, D., Matthews, K., Soifer, B. T.
We report on an investigation of the SBS 1520+530 gravitational lens system and its environment using archival HST imaging, Keck spectroscopic data, and Keck adaptive-optics imaging. The AO imaging...
The Environments of SLACS Gravitational Lenses (2007)
We report on an investigation of the environments of the SLACS sample of gravitational lenses. The local and global environments of the lenses are characterized using SDSS photometry and, when...
Auger, M. W., Fassnacht, C. D., Abrahamse, A. L., Lubin, L. M., Squires, G. K.
We report on the results of a spectroscopic survey of the environments of the gravitational lens systems CLASS B1600+434 (z_l = 0.41, z_s = 1.59) and CLASS B2319+051 (z_l = 0.62). The B1600+434...
Fassnacht, C. D., McKean, J. P., Koopmans, L. V. E., Treu, T., Blandford, R. D., Auger, M. W., ...
We report the serendipitous discovery of two strong gravitational lens candidates (ACS J160919+6532 and ACS J160910+6532) in deep images obtained with the Advanced Camera for Surveys on the Hubble...
Auger, M. W., Fassnacht, C. D., Abrahamse, A. L., Lubin, L. M., Squires, G. K.
We report on the results of a spectroscopic survey of the environments of the gravitational lens systems CLASS B1600+434 (z_l = 0.41, z_s = 1.59) and CLASS B2319+051 (z_l = 0.62). The B1600+434...