SUMMARY OF PROPOSAL 81405
ISAS
3-1-1, YOSHINODAI
SAGAMIHARA
KANAGAWA JAPAN 229-8510
Tel: 042-759-8136 Fax: 042-759-8455
Medium: CD ROM
Subject: X-RAY BINARIES
CONTINUOUS BROADBAND OBSERVATION OF THE GALACTIC JET SOURCE GRS1915+105
ABSTRACT
We propose simultaneous X-ray and $\gamma$-ray observations of microquasar GRS~1915+105 with ASCA and CGRO over a week. The purpose of this observation is to make the singularity of microquasars clear by understanding the origin of $\gamma$-ray continuum, so-called 'hard tail' and the origin of highly ionized plasma which produces resonance absorption lines. GRS~1915+105 is one of the most brightest and variable X-ray sources, whose time scale of the variability is between several micro seconds and several months, but no one has investigated the long intensity variation in the multi-wavelength yet. This observation will be last possible opportunity for long, coordinated, broadband coverage. So we think that ASCA has to take the leadership of this campaign.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| UEDA YOSHIHIRO | ISAS | JAPAN |
| HAJIME INOUE | ISAS | JAPAN |
| AYA KUBOTA | UNIV. OF TOKYO | JAPAN |
| MICHAEL MACCROUGH | NASA/MSFC | USA |
| ERIC GROVE | NRL | USA |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)GRS1915+105 | A | 288.7979 | 10.9458 | 300 ks | N | N | P | 150.00000 | 1 |
TARGET 1
WE HOPE TO OBSERVE GRS1915+105 SIMULATANEOUSLY WITH ASTRO-E DURING ASCA OBSERVATION.