SUMMARY OF PROPOSAL 72123

DR. KAREN MARIE LEIGHLY
LEIGHLY@ULISSE.PHYS.COLUMBIA.EDU

COLUMBIA UNIVERSITY
550 WEST 120TH STREET
NEW YORK
NY USA 10027
Tel: 212-854-6892 Fax: 212-854-8121
Medium: CD ROM
Subject: AGN

ASCA OBSERVATIONS OF POLARIZED SEYFERT 1 GALAXIES


ABSTRACT

Our recent ASCA observation of Mrk 704, a highly polarized optically blue Seyfert 1 galaxy, shows evidence for partial covering by heavy absorption. This result is difficult to explain in terms of simple models. Dust-free gas must be present in the line of sight to the nucleus, but a significant amount of dust out of the line of sight is required also to produce the high polarization rising toward the blue. We propose ASCA observations of three polarized X-ray weak Seyfert 1 galaxies which show little evidence for optical reddening. The anticipated heavily absorbed X-ray spectrum and large covering fraction will underline the disagreement between X-ray and optical absorption indicators and place the most stringent constraints on models to explain the

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
LAURA KAYCOLUMBIA UNIVERSITYUSA
DIRK GRUPEMPEGERMANY

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)MRK 376
C
108.5629 45.6989
40 ks
N
N
P
0.03400
1