SUMMARY OF PROPOSAL 71046
RIKEN
2-1 HIROSAWA
WAKO
SAITAMA JAPAN 351-0198
Tel: 048-467-9337 Fax: 048-462-4640
Medium: 4GBDAT
Subject: X-RAY BINARIES
MULTIWAVE SIMULTANEOUS OBSERVATIONS OF GX 339-4
ABSTRACT
Long-term observations with Ginga ASM, CGRO BATSE, and RXTE ASM have revealed that the black hole candidate GX 339-4 is in the high (soft) state more frequently than other black hole candidates. These observations and those of Cyg X-1 have also shown that, in these sources, a hard to soft state transition often occurs after a large flare in the hard x-ray (20-200 keV) band. Here we propose a series of ASCA observations with RXTE and BASTE and other ground based observeratries to reveal true wide band energy spectra.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| BRAD RUBIN | RIKEN | JAPAN |
| TAKESHI MIHARA | RIKEN | JAPAN |
| PHILIPPE DUROUCHOUX | CEA | FRANCE |
| RAPHAEL LOYER | CEA | FRANCE |
| SHUANG ZHANG | GSFC/NASA | USA |
| KEN EBISAWA | GSFC/NASA | USA |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)GX 339-4 | B | 255.7054 | -48.7896 | 80 ks | N | Y | P | 10.00000 | 4 |
TARGET 1
THIS IS CO-ORDINATE OBSERVATIONS: THE SOURCE WILL BE OBSERVED WITH ASCA, RXTE AND BASTE SIMULTANEOUSLY.