SUMMARY OF PROPOSAL 61233

DR YASUSHI OGASAKA
OGASAKA@IRIDIUM.GSFC.NASA.GOV

NASA/GSFC/JSPS
MD USA 20771
GREENBELT

Tel: 1-301-286-3719 Fax: 1-301-286-1684
Medium: 4GBDAT
Subject: COSMIC X-RAY BACKGROUND DEEP SURVEYS AND OTHER

STATISTICAL CROSS-CORRELATION STUDY OF THE COSMIC X-RAY BACKGROUND IN OPTICAL DEEP MULTICOLOR PHOTOMETRY FIELDS


ABSTRACT

The origin of the Cosmic X-ray Background(CXB) is still now an open question in the X-ray astronomy. Previous observations in soft X-ray band have resolved more than half of the CXB flux to known classes of objects such as AGNs and QSOs, while there sill remains a significant part of the CXB flux unresolved whose constituents may be unknown X-ray sources. We propose short exposure observations of deep optical survey fields where we have well calibrated optical catalogs, and to take cross-correlations of measured X-ray flux distributions to various color-selected subsets of optical objects. Our preliminary analysis of SA68 field shows clear correlation between X-ray surface brightness and optical quasar number distribution.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
TAKAMITSU MIYAJIAIPGERMANY
ALEXANDER SZALAYJOHNS HOPKINS UNIV.USA
ANDREW CONNOLLYJOHNS HOPKINS UNIV.USA
HAJIME INOUEISASJAPAN
TSUNEO KIIISASJAPAN
ELIHU BOLDTNASA/GSFCUSA
YUZURU TAWARANAGOYA UNIV.JAPAN
HIDEYO KUNIEDANAGOYA UNIV.JAPAN

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)LYNX-2
3
131.3000 44.6156 40 ksN
N
P
0.07000
1

TARGET 1

SIS COUNT RATE IS FOR WHOLE SENSOR. USE LEVEL DISCRI IF REQUIRED.