Volume 375, Number 1, August III 2001
|Page(s)||351 - 358|
|Section||Numerical methods and codes|
|Published online||15 August 2001|
Cosmic shear from STIS pure parallels
ST-ECF, Karl-Schwarzschild Str. 2, Garching bei München 85748, Germany
2 Max-Planck-Institut für Astrophysik, Karl-Schwarzschild Str. 1, 85741 Garching, Germany
3 Institut d'Astrophysique de Paris, 98bis boulevard Arago, 75014 Paris, France
4 Observatoire de Paris, DEMIRM 61, avenue de l'Observatoire, 75014 Paris, France
5 Institut für Astrophysik und Extraterrestrische Forschung der Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
6 Department of Physics and Astronomy, University of Pennsylvania 209 S. 33rd Street, Philadelphia, PA 19104, USA
7 Universitäts-Sternwarte München, Scheiner Str. 1, 81679 München, Germany
Corresponding author: N. Pirzkal email@example.com
Accepted: 12 June 2001
Following the second HST servicing mission in 1997 when the STIS instrument was installed and the capability for parallel observations was enhanced, a substantial archive of non-proprietary parallel data has been accumulating. In this paper, we discuss the use of unfiltered STIS imaging data for a project that requires deep observations along as many independent lines-of-sight as possible. We have developed a technique to determine which datasets in the archive can safely be co-added together and have developed an iterative co-addition technique which enabled us to produce 498 high-quality, deep images. The principal motivation for this work is to measure the Cosmic Shear on small angular scales and a value derived from these data will be presented in a subsequent paper. A valuable by-product of this work is a set of high quality combined fields which can be used for other projects. The data are publicly available at http://www.stecf.org/projects/shear/
Key words: cosmology: observations / techniques: image processing / gravitational lensing
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.