SUMMARY OF PROPOSAL 71007

DR. YOSHITAKA SAITO
SAITO@BALLOON.ISAS.AC.JP

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 KAWAIRIKENJAPAN
TAKAMASA YAMAGAMIISASJAPAN
TADAYASU DOTANIISASJAPAN
MUTSUMI SUGIZAKIISASJAPAN
TUNEYOSHI KAMAEUNIV. OF TOKYOJAPAN
KEN'ICHI TORIINASDAJAPAN

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
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