SUMMARY OF PROPOSAL 62124
COLUMBIA UNIVERSITY
550 WEST 120TH STREET
NEW YORK
NY USA 10027
Tel: 212-854-6892 Fax: 212-854-8121
Medium: CD ROM
Subject: AGN
SPECTROSCOPIC OBSERVATIONS OF STEEP SPECTRUM NARROW-LINE SEYFERT 1 GALAXIES
ABSTRACT
ROSAT observations of narrow-line Seyfert 1s found consistently steep spectra and rapid variability, but ASCA observations show more diversity, very different to classical Seyfert 1s. However, in 3 NLS1s, ASCA finds common characteristics of these exciting new class of AGN: a very strong high temperature soft excess, weak hard tail, a possible blue shifted ionized Oxygen edge, and rapid large amplitude variability characterized by nonlinear flares and quiescent periods. These objects have one thing in common: a very steep ROSAT spectrum. It is necessary to observe many more such objects in order to understand the physical processes underlying the different phenomenology in ASCA. We propose ASCA observations of two steep spectrum NLS1s discovered by ROSAT's all sky survey.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| DIRK GRUPE | MPE | GERMANY |
| CHIKO OTANI | RIKEN | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)RX J2217-59 | 1 | 334.4862 | -59.6917 | 50 ks | N | N | P | 0.20000 | 1 |
| 2)RX J0136-31 | 3 | 24.2267 | -31.1647 | 50 ks | N | N | P | 0.10000 | 1 |