SUMMARY OF PROPOSAL 71035
INSTITUTE OF SPACE AND ASTRONAUTICAL SCIENCE
YOSHINODAI 3-1-1
SAGAMIHARA
KANAGAWA JAPAN 229-8510
Tel: 0427-59-8151 Fax: 0427-59-8455
Medium: 2.5GB8MM
Subject: X-RAY BINARIES
ACCRETION-POWERED MILLISECOND PULSAR SAX J1808.4-3658 IN QUIESCENCE
ABSTRACT
Characteristics of the accretion flow at very low accretion rate is poorly understood yet. It is often considered that advection dominated accretion flow (ADAF) is realized as indicated by the observation of black hole transients in quiescence. However, low level X-ray emission from neutron star transients in quiescence seems to contradict to the idea of ADAF. We propose an observation of SAX J1808.4-3658, which is the only accretion-powered millisecond pulsar (P=2.49 msec). Observation of the pulsation in quiescence enables us to probe the accretion flow at very low accretion rate.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| KAZUMI ASAI | KANAGAWA UNIVERSITY | JAPAN |
| MASAHIRO KAWASAKI | ISAS | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)SAX J1808.4-3658 | B | 272.1208 | -36.9767 | 80 ks | N | Y | P | 0.03000 | 1 |