SUMMARY OF SEQUENCE NUMBER 700099

SUMMARY OF SEQUENCE NUMBER 700099

Title: A SURVEY OF GRAVITATIONALLY LENSED QUASARS

Observer: FEIGELSON

Subject Category: Active Galaxies and Quasars

Seq: 700099 ObsId: 00427

Long-term Plan bin: 16-Jan-2000

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
CLASS 1608+656
242.275000
65.533333
7.500000
ACIS-S
NONE
GTO
no
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