We present a detailed velocity histogram from a wide-field spectroscopic survey in the field of the cluster lens Cl0024 showing an unrelaxed foreground structure in addition to the relaxed main cluster. This finding reduces the velocity dispersion of the main cluster compared to previous studies by a factor of about 2 and thus resolves the discrepancy between previous mass estimates for this cluster.
Bulletin d'information du telescope Canada-France-Hawaii
- Pub Date:
- June 1999
- 2 pages, includes 2 postscript figures. Poster contribution to "Gravitational Lensing: Recent Progress and Future Goals", Boston University, July 1999, ed. T. G. Brainerd and C. S. Kochanek