SUMMARY OF PROPOSAL 81410
KYOTO UNIVERSITY
KITASHIRAKAWA-OIWAKE-CHO SAKYO-KU
KYOTO
KYOTO JAPAN 606-8502
Tel: (81)-75-753-3867 Fax: (81)-75-753-3799
Medium: CD ROM
Subject: X-RAY BINARIES
THE SEARCH FOR TRANSIENT STARS AT THE GALACTIC CENTER
ABSTRACT
With ASCA, we found a lot of X-ray objects around the Galactic center region: black hole candidates, neutron star binaries, X-ray reflection nebula, and so on. By studying these objects statistically, we can reveal the environment of the Galactic center region. However, there is many transient sources at the Galactic center. We must know the duty ratio of the transients to investigate the correct number or correct distribution of the whole X-ray sources. Then we propose to observe the Galactic nucleus Sgr A*. We can study the time variabilities and the frequency of transients by this observation. Of course, we also obtain very good data about Sgr A* and nearby binary star, AX J1745.6-2901. They also can be keys for revealing the environment of the Galactic center.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| KATSUJI KOYAMA | KYOTO UNIVERSITY | JAPAN |
| YOSHITOMO MAEDA | PENN. STATE UNIV. | JAPAN |
| MASAAKI SAKANO | KYOTO UNIVERSITY | JAPAN |
| MASAHIRO TSUJIMOTO | KYOTO UNIVERSITY | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)SGR_A | A | 266.4167 | -29.0078 | 400 ks | N | Y | P | 2.50000 | 1 |