SUMMARY OF PROPOSAL 41008 DR. MANABU ISHIDA INSTITUTE OF SPACE AND ASTRONAUTICAL SCIENCE KANAGAWA JAPAN 229 SAGAMIHARA 3-1-1 YOSHINODAI E-mail: ISHIDA@ASTRO.ISAS.AC.JP Tel: 0427-51-3911 Fax: 0427-59-4253 Medium: 4GBDAT Subject: STARS Title: 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 LMXB in the globular clusters is smaller than what is expected from the number of the pulsars by an order of magnitude. It is recently pointed out based on ROSAT observations that a part of the dim cluster sources is probably LMXBs in low-state. We attempt to classify the dim cluster sources by measuring the spectral hardness of them. Also, half of the bright cluster sources known are transient. We try to find out similar bright new sources from other clusters. For these purpose, we propose to observe 5 globular clusters with 20ksec for each. Co-Is: 1 HITOSHI NEGORO ISAS JAPAN NEGORO@ASTRO.ISAS.AC.JP 0427-51-3911 2 KAZUMI ASAI ISAS JAPAN 3 TADAYASU DOTANI ISAS JAPAN 4 KAZUO MAKISHIMA UNIVERSITY OF TOKYO JAPAN 5 SHIGEO YAMAUCHI IWATE UNIVERSITY JAPAN Target Name PRI RA Dec Time TC Off GIS SIS_Cts Obs ------------------- --- -------- -------- ---- -- --- --- ------- --- NGC6266 1 255.3025 -30.1122 20 N N P 0.05000 1 HP 1 1 262.7717 -29.9817 20 N N P 0.05000 1 NGC2808 1 138.0108 -64.8631 20 N N P 0.05000 1 NGC6388 1 264.0708 -44.7350 20 N N P 0.05000 1 NGC6715 1 283.7638 -30.4783 20 N N P 0.05000 1