SUMMARY OF PROPOSAL 51147
INSTITUTE OF SPACE AND ASTRONAUTICAL SCIENCE
KANAGAWA JAPAN 229
SAGAMIHARA
3-1-1 YOSHINODAI
Tel: 0427-51-3911(2612) Fax: 0427-59-4253
Medium: 2.5GB8MM
Subject: AGN
ORIGIN OF THE VERY HARD SPECTRUM OF THE HIGH REDSHIFT QUASAR PKS1937-101(Z
ABSTRACT
We propose to observe the high redshift quasar PKS1937-101(z=3.8). The ROSAT observation showed the X-ray spectrum of this quasar is very hard. ROSAT could not determine whether this hardness is due to an intrinsic flatness or a strong absorption in lower energies, but ASCA can place strong constraints. It is important to understand the origin of the hard spectrum because it must place constraints on the nature of the X-ray emission and the physical environment of AGN in the early universe. It may also give clue to the AGN evolution and the Cosmic X-ray Background.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| TADAYUKI TAKAHASHI | ISAS | JAPAN |
| HAJIME INOUE | ISAS | JAPAN |
| AKIKO YAMASHITA | ISAS | JAPAN |
| MASARU MATSUOKA | RIKEN | JAPAN |
| TAKAYA OHASHI | TOKYO METRO UNIV. | JAPAN |
| NORIKO YAMASAKI | TOKYO METRO UNIV. | JAPAN |
| MAKOTO TASHIRO | TOKYO UNIV. | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)PKS1937-101 | 3 | 294.9887 | -10.0449 | 40 ks | N | Y | P | 0.06000 | 1 |