SUMMARY OF PROPOSAL 62128

DR TRACEY JANE TURNER
TURNER@LHEAVX.GSFC.NASA.GOV

NASA GSFC/ USRA

GREENBELT
MD USA 20771
Tel: 301-286-5190 Fax: 301-286-1629
Medium: CD ROM
Subject: AGN

A SEARCH FOR VARIATIONS IN THE X-RAY ABSORBER FOR A SEYFERT 2 GALAXY.


ABSTRACT

It has never been unambiguously established whether the X-ray absorber in Seyfert 2 galaxies is variable. Some tentative claims have been made to this effect, but these have been based either upon comparison between observations made by different X-ray detectors, or based upon data from instruments with a large field-of-view, where contaminating X-ray sources cast doubt on the origin of the spectral variability. The moderate spatial resolution and good spectral resolution of ASCA allow us the opportunity to establish absorption variability in a Seyfert 2 galaxy. We propose to monitor NGC 526A, which has shown marked X-ray spectral variability in the past.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
IAN GEORGENASA/GSFC/USRAUSA
KIRPAL NANDRANASA/GSFCUSA
HAGAI NETZERTEL AVIV UNIV.ISRAEL

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)NGC 526A
3
20.9792-35.0700 50 ksY
Y
P
0.64000
4

TARGET 1

4 X 50 KSEC REQUESTED. 1X50 K IN DEC 1997 (START OF AO6) TO JAN 1998. 3 X 50 K IN JUN 4 - JUL 25 1998 WINDOW, SPACED AT LEAST TWO WEEKS APART.
MONITORED OBSERVATION:
Min. Interval: 1210.000ksecMax. Interval: 1814.000 ksec