SUMMARY OF SEQUENCE NUMBER 700095
SUMMARY OF SEQUENCE NUMBER 700095
Title: A SURVEY OF GRAVITATIONALLY LENSED QUASARS
Observer: FEIGELSON
Subject Category: Active Galaxies and Quasars
Seq: 700095 ObsId: 00423
Long-term Plan bin: no LTS bin
ABSTRACT
Time delays between components of gravitationally lensed quasars provide a unique and potentially accurate determination of the cosmological quantities H_o and q_o. Quasars generally have stronger and more rapid variations in the X-ray band than at lower frequencies so that reliable time delay measurements should be achievable. High resolution X-ray images are needed both to resolve the quasar images and to study the mass distribution of the intervening lensing structure. This observation surveys promising candidates for later intensive monitoring to obtain time delay measurements.
TARGET SUMMARY
| TARGET NAME |
RA | DEC |
TIME |
SI |
GRAT |
TYPE |
TC |
ROLL |
PRE |
PHASE |
MULTI |
PRI |
| PMN J1131+0455 |
172.985417 | 4.930278 |
7.500000 |
ACIS-S |
NONE |
GTO |
yes |
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
