SUMMARY OF PROPOSAL 61123
INSTITUTE OF SPACE AND ASTRONAUTICAL SCIENCE
KANAGAWA JAPAN 229
SAGAMIHARA
3-1-1, YOSHINODAI
Tel: 0427-51-3911 Fax: 0427-59-4253
Medium: 2.5GB8MM
Subject: AGN
THE BROAD IRON LINE IN THE POWERFUL RADIO GALAXY 3C109
ABSTRACT
The powerful radio galaxy 3C109 is the most luminous object (2e45 erg/s in the 2-10 keV band) known to show a broad iron line. Radio jets are seen in the object down to parsec scales, so a determination of the iron line profile will illuminate our understanding of the interaction between disks and jets. Disk accretion appears to be necessary for the formation of jets but the mechanism is highly uncertain. X-ray observations offer the only means to determine disk properties on the relevant inner scale. The previous 36 ks ASCA observation (Allen et al 1997) showed that the inner radius of the disk must be less than 70 Rs; the 100 ks observation proposed here will bring that limit to less than 30 Rs, considerably less if the source is as bright as when observed by ROSAT in 1991.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| HAJIME INOUE | ISAS | JAPAN |
| AKIKO YAMASHITA | ISAS | JAPAN |
| CHIHO MATSUMOTO | ISAS | JAPAN |
| A.C. FABIAN | INST. OF ASTRONOMY | UK |
| S.W. ALLEN | INST. OF ASTRONOMY | UK |
| KAZUSHI IWASAWA | INST. OF ASTRONOMY | UK |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)3C109 | 3 | 63.4183 | 11.2041 | 40 ks | N | Y | P | 0.20000 | 1 |