SUMMARY OF PROPOSAL 51069
OSAKA UNIVERSITY
OSAKA JAPAN 560
TOYONAKA
1-1, MACHIKANEYAMA-CHO
Tel: 06-850-5476 Fax: 06-850-5539
Medium: 2.5GB8MM
Subject: X-RAY BINARIES
OBSERVATION OF CYGNUS X-3 IN ITS LOW STATE
ABSTRACT
Cygnus X-3 exhibits a ''High State'' and a ''Low State''. The two states are differ widely in the continuum spectra and in the properties of iron line. The previous ASCA observations were taken only in its ''High State'', and revealed emission lines from various elements and emission-line-like feature produced by free-bound transition for S XVI. The plasma producing these spectral features is influenced by the luminosity and energy spectrum of a central source and plasma density. To understand two different intensity state transition, it is important to study the relations between a central source and the surrounding plasma. This study is enabled by sperior energy resolution of ASCA.
CO-INVESTIGATORS
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)CYGNUS X-3 | 3 | 308.1071 | 40.9580 | 40 ks | N | Y | P | 50.00000 | 1 |
TARGET 1
IN ORDER TO OBSERVE THE LOW STATE, THE OBSERVATION TIME WILL BE DETERMINED BY THE DATA OF ALL SKY MONITOR ONBOARD RXTE.