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Title:
Pears: Probing Evolution And Reionization Spectroscopically
Authors:
Malhotra, Sangeeta; PEARS collaboration
Affiliation:
AA(Arizona State University), AB()
Publication:
American Astronomical Society Meeting 210, #08.10; Bulletin of the American Astronomical Society, Vol. 38, p.104
Publication Date:
05/2007
Origin:
AAS
Bibliographic Code:
2007AAS...210.0810M

Abstract

The PEARS (Probing Evolution and Reionization Spectroscopically) project is a succesor to the GRAPES survey and uses the slitless G800L grism on the Hubble Space Telescope's Advanced Camera for Surveys (ACS) to obtain sensitive spectra of faint objects in the GOODS fields. In the Hubble Ultra Deep Field, we obtain spectra for objects as faint as 27.5 magnitudes, and in eight additional ACS fields we reach a depth of z'(AB)=26.5. We are able to confirm spectroscopically high redshift Lyman break galaxies between redshifts z=4.5 and 7.0, elliptical and spiral galaxies up to z=2, emission line galaxies, active galactic nuclei, and cool dwarf stars. Moreover, photometric redshifts are substantially improved by adding the low-resolution spectra. The observations were fully completed prior to the end of ACS operations. Final data products (i.e., fully reduced spectra) will be made publically available after science verification. In this poster, we present a sampling of PEARS results. We also present an overview of the survey design and the PEARS data set, and an introduction to the strengths and weaknesses of these spectra, which we hope will help make them useful to the broader community.
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