It is a source of strong and very hot X-ray emission and has an asymmetric galaxy distribution, indicating a large mass and recent formation. North is up and East is left. The arcs and arclets in this cluster are particularly well visible in this image. The total exposure time was 600 seconds.
North is up and East is left.
Other arcs and arclets are also visible. The total exposure time was 1.5 hours. Star forming galaxies at lower redshifts have very similar spectra. Outlook The new FORS data will allow a much more detailed modelling of the gravitational lens and a better estimate of the cluster mass than was possible before. There are several additional strong lensing features visible in the field.