SUMMARY OF SEQUENCE NUMBER 700034
SUMMARY OF SEQUENCE NUMBER 700034
Title: ACIS STUDY OF GRAVITATIONALLY LENSED QUASARS
Observer: FEIGELSON
Subject Category: Active Galaxies and Quasars
Seq: 700034 ObsId: 00362
Long-term Plan bin: 10-Apr-2000
ABSTRACT
The ability to observe a distant quasar subject to gravitational lensing by a foreground cluster of galaxies provides unique insight into dark matter in clusters, cosmological parameters H_o and q_o, Ly-alpha absorption systems, and more. ACIS imaging can simultaneous resolve the emission of the AGN components and the intracluster medium of the lensing cluster, if present. Repeated observations can measure time delays and ACIS grating spectroscopy can measure differences in absorption along different lines of sight.
TARGET SUMMARY
| TARGET NAME |
RA | DEC |
TIME |
SI |
GRAT |
TYPE |
TC |
ROLL |
PRE |
PHASE |
MULTI |
PRI |
| Q0957+561 |
150.338875 | 55.899211 |
50.00000 |
ACIS-S |
NONE |
GTO |
no |
yes |
no |
no |
no |
5 |
IMAGES
(NOTE: RASS images currently only available for targets LTS scheduled on or after Apr-09-2000)
PARAMETERS
Obscat Parameters
