SUMMARY OF PROPOSAL 61058
GRADUATE SCHOOL OF SCIENCE, OSAKA UNIVERSITY
OSAKA JAPAN 560
Tel: 06-850-5478 Fax: 06-850-5539
Subject: X-RAY BINARIES
CYG X-3 IN ITS LOW STATE
ABSTRACTIn the low state of Cyg X-3, it shows the brightest iron emission line in the sky. ASCA, however, has not yet observed the low state of Cyg X-3. Cyg X-3 was observed with ASCA two times in its high state. ASCA found many emission lines form various elements and emission-line-like feature produced by free-bound transition for S XVI. This was the first direct evidence of the photo-ionized plasma in the universe. The plasma condition should be influenced by the luminosity and the energy spectrum of the central source. The observation of the low state of Cyg X-3 will provide various surprising feature that we have never seen.
|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||4|
TARGET 1THE OBSERVATION SHOULD BE DIVIDED INTO FOUR TERMS, BUT THEY ARE NOT TIME CRITICAL.