SUMMARY OF PROPOSAL 51061
RIKEN
SAITAMA JAPAN 351-01
WAKO
2-1, HIROSAWA
Tel: 048-462-1111 X3229 Fax: 048-462-4640
Medium: 4GBDAT
Subject: X-RAY BINARIES
A NEW X-RAY NOVA GRS 1739-278 : THIRD TRANSIENT JET SYSTEM?
ABSTRACT
GRS 1739-278 is a new X-ray nova discovered in Mar. 1996. Forty days after the onset of the X-ray outburst, a radio outburst was observed. Such delayed radio outburst is peculiar to transient jet systems like GRO J1655-40 or GRS 1915+105. Therefore, GRS 1739-278 is suspected to be third transient jet source. If it is a jet system, resonance absorption lines or Doppler-shifted emission lines are expected to be found, as the cases of other ASCA observations of jet systems. We propose a simultaneous observation of GRS 1739-278 with radio to explore its nature. This observation would test the anti-correlation of the X-ray and the radio emission, which is predicted by a jet-supression scenerio, and would be a clue to the mechanism of the resonance absorption detected in the jet systems.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| KEN EBISAWA | NASA/GSFC | USA |
| ROBERT HJELLMING | NRAO | USA |
| RICHARD HUNSTEAD | UNIV. OF SYDNEY | AUSTRALIA |
| HAJIME IOUE | ISAS | JAPAN |
| WALTER LEWIN | MIT | USA |
| TOSHIAKI TAKESHIMA | NASA/GSFC | USA |
| YASUO TANAKA | MPIE | GERMANY |
| YOSHIHIRO UEDA | ISAS | JAPAN |
| KINWAH WU | UNIV. OF SYDNEY | AUSTRALIA |
| FUMIAKI NAGASE | ISAS | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)GRS 1739-278 | 2 | 265.5000 | -27.7480 | 40 ks | N | Y | P | 700.00000 | 1 |
TARGET 1
700 C/S IS THE VALUE AT HIGH STATE.