SUMMARY OF PROPOSAL 73018

INGO LEHMANN
ILEHMANN@AIP.DE

ASTROPHYSIKALISCHES INSTITUT POTSDAM
AN DER STERNWARTE 16
POTSDAM
GERMANY D-14482
Tel: +49-331-7499-328 Fax: +49-331-7499-526
Medium: CD ROM
Subject: AGN

A HARD X-RAY SPECTROSCOPY OF NEARBY OBSCURED AGN CANDIDATES


ABSTRACT

The soft X-ray luminosity function of galaxies is dominated by AGN above L_X=10^42 erg/s, below this value by normal galaxies. We have investigated a complete flux-limited sample of ROSAT Bright Survey AGN and galaxies with log L_X<42.5 to discriminate between the nuclear and galaxy flux. Using ROSAT HRI data we calculated the radial wobble-corrected profiles of the sources which were compared with a re-calibrated ROSAT HRI Point Spread function. About half of the studied low-luminosity AGN show significant contribution of stellar emission to the soft X-ray luminosity. Some galaxies are not X-ray extended indicating a possible X-ray flux contribution from a hidden AGN. We propose to perform ASCA SIS and GIS hard X-ray spectroscopy of 3 nearby galaxies in order to search for AGN activity.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
TAKAMITSU MIYAJIAIPGERMANY
GUENTHER HASINGERAIPGERMANY

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)HOLMBERG II
B
124.8729 70.7058
20 ks
N
Y
P
0.20000
1
2)MRK202
B
184.4779 58.6600
20 ks
N
Y
P
0.20000
1
3)RXS J144701.1+114536
B
221.7546 11.7600
20 ks
N
Y
P
0.20000
1