SUMMARY OF PROPOSAL 51010
INSTITUTE OF SPACE AND ASTRONAUTICAL SCIENCE
KANAGAWA JAPAN 229
SAGAMIHARA
3-1-1 YOSHINODA
Tel: 0427-51-3911 EXT.2612 Fax: 0427-59-4253
Medium: 4GBDAT
Subject: STARS
SEARCH FOR LOW-MASS X-RAY BINARIES IN THE GALACTIC GLOBULAR CLUSTERS
ABSTRACT
Although the globular cluster rotation-powered pulsars are believed to be the descendants of LMXBs, the number of bright LMXB in the globular clusters is smaller than what is expected from the number of the pulsars by an order of magnitude. ROSAT observations suggest the dim cluster sources are probably LMXBs in low-state, and contribute to the formation of the pulsars. In AO-4, we observed 5 dense globular clusters and found new dim sources from all of them, which implies potential existence of dim sources in most globular clusters. We propose to obseverve another 5 globular clusters for 20ksec for each in order to estimate the total number of dim sources over the galactic globular clusters.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| HITOSHI NEGORO | ISAS | JAPAN |
| KAZUMI ASAI | ISAS | JAPAN |
| TADAYASU DOTANI | ISAS | JAPAN |
| KAZUO MAKISHIMA | UNIVERSITY OF TOKYO | JAPAN |
| SHIGEO YAMAUCHI | IWATE UNIVERSITY | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)NGC6517 | 3 | 270.4608 | -8.9589 | 20 ks | N | Y | P | 0.05000 | 1 |
| 2)NGC362 | 3 | 15.8096 | -70.8483 | 20 ks | N | Y | P | 0.05000 | 1 |