SUMMARY OF PROPOSAL 71007
ISAS
3-1-1, YOSHINODAI
SAGAMIHARA
KANAGAWA JAPAN 229-8510
Tel: 0427-59-8238 Fax: 0427-59-8238
Medium: 2.5GB8MM
Subject: STARS
STUDY OF TIME VARIATION OF A MAGNETAR 1E1841-045 IN KES73
ABSTRACT
We propose monitering observation of 1E1841-045 in Kes 73, which has recently been rediscovered as a 11-sec pulsar. It has extremely strong surface magnetic field of 8 x 10^14 gauss and one of the stongest candidate of the magnetar. Combining the 4 succeeding observations lasting for about 700 ksec, we are going to study its timing irregularity and obtain the period derivative and its second derivative. The observation must provide us keys for the inner structure of neutron stars and their origin of strong magnetic field.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| NOBUYUKI KAWAI | RIKEN | JAPAN |
| TAKAMASA YAMAGAMI | ISAS | JAPAN |
| TADAYASU DOTANI | ISAS | JAPAN |
| MUTSUMI SUGIZAKI | ISAS | JAPAN |
| TUNEYOSHI KAMAE | UNIV. OF TOKYO | JAPAN |
| KEN'ICHI TORII | NASDA | JAPAN |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)1E1841-0045 | A | 280.3300 | -4.9368 | 80 ks | Y | N | P | 1.30000 | 4 |
TARGET 1
WE PROPOSE 4 TIMES OF 20 KSEC OBSERVATIONS. SEPARATION OF THE OBSERVATIONS SHOULD BE ABOUT 200 KSEC.
MONITORED OBSERVATION:
Min. Interval: 150.000ksecMax. Interval: 250.000 ksec