SUMMARY OF PROPOSAL 61228
ISAS
KANAGAWA JAPAN 229
SAGAMIHARA
3-1-1 YOSHINODAI
Tel: 0427-51-3911 EXT.2622 Fax: 0427-59-4253
Medium: 2.5GB8MM
Subject: COSMIC X-RAY BACKGROUND DEEP SURVEYS AND OTHER
FOLLOW-UP OBSERVATION OF THE LARGE SKY SURVEY
ABSTRACT
We propose a systematic follow-up observation of the ASCA Large Sky Survey. The LSS is the first unbiased sky survey above 2 keV (up to 10 keV) with an imaging instrument and covers a continuous field of 6 deg2 with exposure tume of 30 ks. The average spectrum of detected sources is harder than that of nearby type I AGN, suggesting that the spectral paradox is beginining to be solved. However, it is still unclear what are these hard sources. In order to study the nature of the 2-10 keV source polulation and thus provide a clear picture of the composition of the CXB, precise mesurement of the individual source spectrum is a crucial task. The main aim is to to discriminate whether they are higyly absorbed sources (type II AGN) or other type of sources.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| TAKESHI TSURU | KYOTO | JAPAN |
| MASAAKI SAKANO | KYOTO | JAPAN |
| MASAYUKI AKIYAMA | KYOTO | JAPAN |
| KOUJI OHTA | KYOTO | JAPAN |
| TORU YAMADA | TOHOKU | JAPAN |
| TADAYUKI TAKAHASHI | ISAS | JAPAN |
| HAJIME INOUE | ISAS | JAPAN |
| YOSHITAKA ISHISAKI | TOKYO METRO. | JAPAN |
| YASUSHI OGASAKA | ISAS | JAPAN |
| KAZUO MAKISHIMA | TOKYO | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)CENT | 1 | 198.6200 | 31.5400 | 200 ks | N | Y | P | 0.05000 | 10 |
TARGET 1
CENT IS ONLY CENTER OF THE WHOLE SURVEY REGION. CENT IS NOT ACTUAL POINTING POSITION. THE ROLL ANGLE MUST BE 60,150,240, OR 330DEG.