SUMMARY OF PROPOSAL 62128
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 GEORGE | NASA/GSFC/USRA | USA |
| KIRPAL NANDRA | NASA/GSFC | USA |
| HAGAI NETZER | TEL AVIV UNIV. | ISRAEL |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)NGC 526A | 3 | 20.9792 | -35.0700 | 50 ks | Y | 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