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Issue A&A
Volume 410, Number 1, October IV 2003
Page(s) 45 - 52
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20031196



A&A 410, 45-52 (2003)
DOI: 10.1051/0004-6361:20031196

A weak lensing analysis of a STIS dark-lens candidate

T. Erben1, J. M. Miralles1, D. Clowe1, M. Schirmer1, P. Schneider1, W. Freudling2, N. Pirzkal2, R. A. E. Fosbury2 and B. Jain3

1  Institut für Astrophysik und Extraterrestrische Forschung (IAEF), Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
2  ST-ECF, European Southern Observatory, Karl-Schwarzschild Str. 2, 85741 Garching, Germany
3  Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA

(Received 25 April 2003 / Accepted 31 July 2003)

Abstract
We perform a weak lensing analysis on a previously reported dark-lens candidate on STIS Parallel data (Miralles et al. 2002). New VLT-data indicate that the reported signal originates from a small number of galaxies tangentially aligned towards the center of the STIS field but no signature for an extended mass distribution is found. We argue that we should be able to detect a massive cluster ( $M\geq 3.2\times 10^{14}~M_{\odot}$) through its lensing signal up to a redshift of $z\approx 0.6$ with our data. Also the double image hypothesis of two galaxies with very similar morphologies in the STIS data is ruled out with colour information.


Key words: galaxies: clusters: general

Offprint request: T. Erben, terben@astro.uni-bonn.de




© ESO 2003


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