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 RADEC 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)

Roll/Visibility

PARAMETERS

Obscat Parameters