SUMMARY OF PROPOSAL 41128 MR HIDEHIRO KANEDA UNIVERSITY OF TOKYO TOKYO JAPAN 113 BUNKYO-KU 7-3-1 HONGO E-mail: KANEDA@MIRANDA.PHYS.S.U-TOKYO.AC.JP Tel: 03-3812-2111 EX4173 Fax: 03-3812-6938 Medium: 2.5GB8MM Subject: AGN Title: OBSERVATION OF THE MIDDLE AND THE OUTER LOBE OF CENTAURUS A Abstract: We propose to observe the middle lobe and the outer lobe of Cen A with 2 pointings. Of large area of Cen A outer lobes, we selected 2 fields, one of which is the middle lobe peak and the other is the outer lobe edge. Einstein detected the X-ray excess in the middle lobe regions, while ROSAT discovered the arc-shaped, rim-brightening X-ray excess from the N edge of the outer lobe. So, we want to determine the origins of these X-ray excesses by analyzing the X-ray spectra of both regions. At the same time, it is also expected to detect the inverse-Compton X-rays scattering off the CMB photons from the outer lobe itself. By comparing the inverse-Compton X-rays flux and the synchrotron radio flux, we can determine the magnetic field strength in the outer lobe without any assumptions. Co-Is: 1 MAKOTO TASHIRO UNIVERSITY OF TOKYO JAPAN (No Co-I contact data) 2 KAZUO MAKISHIMA UNIVERSITY OF TOKYO JAPAN 3 HAJIME INOUE ISAS JAPAN 4 MUTSUMI SUGIZAKI ISAS JAPAN Target Name PRI RA Dec Time TC Off GIS SIS_Cts Obs ------------------- --- -------- -------- ---- -- --- --- ------- --- CEN A MIDDLE LOBE 3 201.7300 -42.4300 40 N N P 0.04000 1