SUMMARY OF PROPOSAL 82125

DR KIRPAL NANDRA
NANDRA@LHEAMAIL.GSFC.NASA.GOV

NASA'S GSFC
MAIL CODE 662
GREENBELT
MD USA 20771
Tel: (301) 286 0935 Fax: (301) 286 1684
Medium: CD ROM
Subject: AGN

BLACK HOLES AND ACCRETION DISKS IN QUASARS


ABSTRACT

Iron K-alpha lines are our most direct probe of the black hole and accretion disk at the heart of AGN. So far, good profiles have been obtained only for the nearest Seyfert galaxies. We propose a 3 week observation of the bright quasar PG 0804+761, to obtain the first high SNR profile of a quasar. We thereby hope to understand the origin of the apparent changes in line profile with luminosity. We will simultaneously obtain the first high quality power spectrum of a quasar, seek to verify the existence of a warm absorber, and examine the time variability of the various spectral components.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
IAN GEORGENASA/GSFCUSA
RICHARD MUSHOTZKYNASA/GSFCUSA
JANE TURNERNASA/GSFCUSA
TAHIR YAQOOBNASA/GSFCUSA

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)PG 0804+761
B
122.7438 76.0450
750 ks
N
N
P
0.50000
1