SUMMARY OF PROPOSAL 71139

DR. KIYOSHI HAYASHIDA
HAYASIDA@ESS.SCI.OSAKA-U.AC.JP

OSAKA UNIVERSITY
1-1, MACHIKANEYAMA
TOYONAKA
OSAKA JAPAN 560-0043
Tel: 81-6-850-5476 Fax: 81-6-850-5539
Medium: 2.5GB8MM
Subject: AGN

SEARCH FOR HIGH-LOW (SOFT-HARD) TRANSITION IN THE X-RAY SPECTRUM OF AGNS


ABSTRACT

Steller black hole candidates (SBHC) shows two distinctive states depending on the X-ray flux; High state and Low state. The latter state is characterized with a hard power low spectrum and rapid variavility. AGN is believed to be a system with a super massive black hole. Its X-ray spectrum and variability resembles the SBHC in its low state. Nevertheless, a new class of AGNs showing extremely soft spectrum ( resembleing SBHC high state) has been found. Most of them are classified as narrow line Seyfert 1 type. So far, however, no transition was observed for a particular AGNs between low to hard state. In this proposal, we try to catch it by observing 6 NLS1s which was previously observed with ASCA and showed sfot spectrum. IRAS

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
KIYOSHI HASHIMOTODANIOSAKA UNIVERSITYJAPAN
TAKAYOSHI KOHMURAOSAKA UNIVERSITYJAPAN
HIDEKI OGATAOSAKA UNIVERSITYJAPAN

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)IRAS13224-3809
C
201.3350-38.4166
15 ks
N
Y
P
0.10000
1
2)H0707-495
C
107.1725-49.5684
15 ks
N
Y
P
0.10000
1