NOAO > Observing Info > Approved Programs > 2009A-0137
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NOAO > Observing Info > Approved Programs > 2009A-0137 |
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PI: Douglas Clowe, Ohio University, clowe@ohio.edu
Address: Physics Department, 251B Clippinger Lab, Athens, OH 45701, USA
CoI: Melville Ulmer, Northwestern University
Title: Applying Weak Lensing Tomography to EDisCS
Abstract:
Weak lensing tomography is an exciting new tool that can be used to
measure cosmological model parameters without having to measure absolute
distances or without having to understand the physics of objects at high
z. Despite being projected as one of the best methods to measure the
evolution of dark energy, tomography has never been used on real data to
place constraints on dark energy due mostly to the stringent
requirements of good seeing for weak lensing shear measurements and deep
photometry over the entire optical and near-IR spectral range for good
photometric redshifts. One data set which can almost provide a
tomographic measurement is that of the ESO Distant Cluster Survey
(EDisCS), but it is missing the deep B and z band images necessary to
obtain good photometric redshifts. Here we propose to obtain the B and
z band imaging on the CTIO Blanco telescope to allow us to perform the
tomographic measurements. This is a resubmission of a proposal which
received time in 2008A, but was weathered out. This is part of a larger
proposed survey (PI: Ulmer), and should not be considered if that survey
is awarded time by the survey TAC.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2009A-0137 |
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