SUMMARY OF PROPOSAL 52145
UNIVERSITY OF NEBRASKA
BRACE LABORATORY
LINCOLN
NE USA 68588-0111
Tel: (402) 472-4788 Fax: (402) 472-2879
Medium: 5GB8MM
Subject: AGN
MRK 42 AND MRK 957: TWO EXTREME NARROW-LINE STRONG FE II EMITTING QUASARS
ABSTRACT
We propose to observe two "Narrow Line Seyfert 1's" (= NLS1's), Mrk 42 and Mrk 957, with ASCA. These objects were chosen because of their extremely narrow Balmer lines and strong optical Fe II emission. Our targets (and NLS1's in general) are known to have very steep soft X-ray spectra, possibly due to strong soft X-ray excesses. They also vary rapidly in soft X-rays. In our ASCA observations we are seeking to learn whether these objects are steeper than usual above 2 keV. We want to see whether an abnormally steep hard X-ray spectrum (already found in one NLS1 with ASCA) is a common property of NLS1's. We will also search for flux and spectral variability and probe iron K-alpha line emission.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| W. NIEL BRANDT | SAO | USA |
| CHIKO OTANI | RIKEN | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)MRK 42 | 1 | 178.4238 | 46.2117 | 40 ks | N | Y | P | 0.08000 | 1 |
| 2)MRK 957 | 2 | 10.4725 | 40.3547 | 40 ks | N | Y | P | 0.05000 | 1 |