SUMMARY OF PROPOSAL 63023

DR GRAZIELLA BRANDUARDI-RAYMONT
GBR@MSSL.UCL.AC.UK

UNIVERSITY COLLEGE LONDON - MULLARD SPACE SCIENCE LABORATORY
HOLMBURY ST MARY
DORKING
SURREY UK RH5 6NT
Tel: +1483 204133 Fax: +1483 278312
Medium: 4GBDAT
Subject: AGN

SEARCHING FOR ULTRA-SOFT AGN: ASCA SPECTRA OF EUV-SELECTED SEYFERT 1 GALAXIES


ABSTRACT

We propose to search for 'ultra-soft' Active Galactic Nuclei (AGN) by obtaining ASCA spectra of five EUV-selected Seyfert 1 galaxies. We will measure their 0.4 - 10 keV spectral slopes and establish whether their strong EUV and soft X-ray flux is large with respect their higher energy emission, i.e. whether they are truly ultra-soft. The results of our study will test the nature of the X-ray emission in these objects and challenge the models which try and explain what was originally considered the 'canonical' spectrum of active galaxies.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
ELIZABETH PUCHNAREWICZMSSLUK

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)EUVE J1421+477
3
215.3733 47.7908 20 ksN
Y
P
0.14000
1