SUMMARY OF PROPOSAL 51164

PROF. MASARU MATSUOKA
MATSUOKA@POSTMAN.RIKEN.GO.JP

RIKEN
SAITAMA JAPAN 351-01
WAKO-SHI
HIROSAWA 2-1
Tel: +81-48-462-1111 EXT.3221 Fax: +81-48-462-4640
Medium: 4GBDAT
Subject: AGN

OBSERVATIONS OF RADIO QUIET HIGH-Z QSO FOR THE CXB


ABSTRACT

So far observed distant (z>1) quasars mostly show steeper spectra in the 2-10 keV band than that of the cosmic X-ray background (CXB) . We have more than 80 well qualified AGN spectra by ASCA, but their properties are not well balanced due to poor observation sample of high z radio quiet (RQ) QSO s. A considerable fraction of low luminosity AGN have X-ray spectra as flat as the CXB. In this proposal we selected three high z RQ QSOs which were already detected in the ROSAT survey and/or pointing observations. We expect that these sources have considerable flat spectra with higher absorption. This confirmation is very important for AGN evolution as well as the CXB.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
CHIKO OTANIRIKENJAPAN
TATEHIRO MIHARARIKENJAPAN
MASSIMO CAPPIRIKENJAPAN
WOLFGANG BRINKMANNMPEGERMANY

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)1352-2242
2
208.9308-22.9519 40 ksN
Y
P
0.05600
1
2)0040+0034
2
10.8321 0.8544 40 ksN
Y
P
0.08300
1

TARGET 1

SUN ANGLE ALLOWING, WE REQUIRE THAT THE NEARBY (5' APART) GALAXY IRASF13526-2241 SHOULD BE IN THE FIELD OF VIEW OF BOTH GIS AND SIS.