SUMMARY OF SEQUENCE NUMBER 800083
SUMMARY OF SEQUENCE NUMBER 800083
Title: DARK CLUSTERS AS GRAVITATIONAL LENSES
Observer: WILLIGER
Subject Category: Clusters of Galaxies
Seq: 800083 ObsId: 00907
Long-term Plan bin: 26-Mar-2000
ABSTRACT
We propose to search for high (z ~ 1) redshift clusters of galaxies in the field of 5 wide-separation `dark' gravitational lens systems, which serve as indicators for the presence of massive intervening objects. The discovery and eventual determination of the space density of these objects has important consequences for cosmology, in particular for the process of structure formation in the Universe, and can serve as a discriminator between its diverse scenarios. We propose a 20 ksec exposure with ACIS-I towards each lens with the goal of establishing the presence or not of X-ray clusters of galaxies in these fields.
TARGET SUMMARY
| TARGET NAME |
RA | DEC |
TIME |
SI |
GRAT |
TYPE |
TC |
ROLL |
PRE |
PHASE |
MULTI |
PRI |
| QB 1429-008A,B |
218.121667 | -1.104722 |
20.00000 |
ACIS-I |
NONE |
GO |
no |
no |
no |
no |
no |
5 |
IMAGES
(NOTE: RASS images currently only available for targets LTS scheduled on or after Apr-09-2000)
PARAMETERS
Obscat Parameters
