SUMMARY OF PROPOSAL 72186
UNIVERSITY OF HAWAII
2680 WOODLAWN DRIVE
HONOLULU
HI USA 96822
Tel: 808-956-8319 Fax: 808-956-9590
Medium: CD ROM
Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS
TWO EXTREMELY X-RAY LUMINOUS CLUSTERS BEHIND THE GALACTIC PLANE
ABSTRACT
We propose ASCA observations of two previously unknown galaxy clusters at z~0.3 found to be among the most X-ray luminous clusters in the sky. CL0142.9+4438 and CL1938.3+5409 were discovered in an ongoing X-ray survey in search of clusters behind the Galactic Plane. The detection of these exceptional systems and the overall success of the program demonstrate the potency of the X-ray approach and the need to push cluster surveys and large-scale structure studies well into the traditional zone of avoidance. Both clusters appear extremely rich and also exhibit signs of gravitational lensing. The proposed observations will allow us to measure the temperatures of these massive systems, enable determinations of their X-ray masses and allow a comparison of X-ray and lensing mass measurements.
CO-INVESTIGATORS
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)CL0142.9+4438 | B | 25.7250 | 44.6333 | 60 ks | N | N | P | 0.18000 | 1 |
| 2)CL1938.3+5409 | C | 294.5792 | 54.1581 | 50 ks | N | N | P | 0.21000 | 1 |