SUMMARY OF PROPOSAL 71116

DR. KAZUHISA MITSUDA
MITSUDA@astro.isas.jaxa.jp

ISAS
3-1-1 YOSHINODAI
SAGAMIHARA
KANAGAWA JAPAN 229-8510
Tel: +81-427-59-8134 Fax: +81-427-59-8455
Medium: 4GBDAT
Subject: AGN

THE GRAVITATIONALLY-LENSED BLAZAR, PKS 1830-211


ABSTRACT

PKS 1830-211 is a Blazar gravitationally lensed by a foreground galaxy at z=0.89 (and possibly by another galaxy at z=0.19). Since only one of the two lensed images of the AGN is obscured by a thick (N_H ~ 5e22) interstellar matter of the lensing galaxy, we can separate the two images from temporal variations. The following scientific results are expected. (1) Constrains on the metal abundance of interstellar matter, which further constrains the star formation activities at z=0.89. (2) The magnification ratio of two lensed images which constrains the lens model. (3) Time variations of two images, in particular, the time delay between the two images. (4) Redshift of the Blazar if it has an iron emission line of EW=30eV. (5) Constraints on the Hubble constant from the above results.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
NAOMI OTAISASJAPAN
MAKOTO HATTORITOHOKU UNIVERSITYJAPAN
TATEHIRO MIHARARIKENJAPAN
YUTARO SEKIMOTOUNIVERSITY OF TOKYOJAPAN

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)PKS 1830-211
B
278.4162-21.0610
80 ks
Y
N
P
0.30000
8

TARGET 1

PLEASE ALLOCATE 8 POINTINGS OF 10KSEC EACH WITH NEARLY EQUAL INTERVALS BETWEEN MAR 4 - APR 24 OR SEP 6 - OCT 27, 1999 (Y - SUN ANGLE < 25 DEG).
MONITORED OBSERVATION:
Min. Interval: 518.000ksecMax. Interval: 691.000 ksec