SUMMARY OF PROPOSAL 81602

PROF. KAZUO MAKISHIMA
MAXIMA@PHYS.S.U-TOKYO.AC.JP

UNIVERSITY OF TOKYO
7-3-1 HONGO
BUNKYO-KU
TOKYO JAPAN 113-0033
Tel: +81-03-5841-4171 Fax: +81-03-5841-4059
Medium: CD ROM
Subject: NORMAL GALAXIES

LONG EXPOSURE ONTO AN ULTRA-LUMINOUS COMPACT SOURCE IN IC342


ABSTRACT

We propose to observe the ultra-luminous, highly variable, compact X-ray source, called source~1, located in the nearby spiral galaxy IC342. Its spectra obtained in the ASCA PV observation can be described very well with a mult-color disk blackbody model of T_{in} 1.7 keV, suggesting that the object is a mass accreting black hole (BH). However, the high value of T_{in} apparently contradicts the high BH mass required by its high luminosity up to 2 10^{40} ergs s^{-1}. A 200 ksec exposure onto this object will help us solve these puzzles, through; (1) a search for the oribtal period; (2) study of the short-term variability; (3) better quantification of the spectrum; and (4) investigation of the spectral changes.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
TSUNEFUMI MIZUNODPT.PHYSICS, U.TOKYOJAPAN
AYA KUBOTADPT.PHYSICS, U.TOKYOJAPAN
MAKOTO TASHIRODPT.PHYSICS, U.TOKYOJAPAN
TADAYASU DOTANIISASJAPAN
KAZUHISA MITSUDAISASJAPAN
YOSHIHIRO UEDAISASJAPAN
KAZUTAKA YAMAOKAISASJAPAN
KAZUMI ASAIISASJAPAN
KEN EBISAWANASA/GSFCUSA
KYOKO OKADARIKEN/SPRING8JAPAN

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)IC342 SOURCE 1
A
56.4792 68.0847
300 ks
N
Y
P
0.20000
1