SUMMARY OF PROPOSAL 41146 DR. FUMIYOSHI MAKINO INSTITUTE OF SPACE AND ASTRONAUTICAL SCIENCE KANAGAWA JAPAN 229 SAGAMIHARA 3-1-1 YOSHINODAI E-mail: MAKINO@ASTRO.ISAS.AC.JP Tel: 0427-51-3911 EX 2622 Fax: 0427-59-4253 Medium: 2.5GB8MM Subject: AGN Title: MULTIFREQUENCY MONITORING OF BRIGHT GEV-GAMMA QUASAR 3C279 Abstract: 3C279 is a typical OVV quasar with high variability in radio through GeV-gamma-ray, and the brightest GeV-gamma-ray AGN. The property in radio to X-rays will strongly support the SSC model. However, bright GeV-gamma-ray flux by CGRO cannot be simply explained by this model. The research of GeV-gamma-ray emission mechanism unknown is expected to lead the origin of blazar activity, like as jets and relativistic electron production. We would propose the ASCA monitoring observation of 3C279 simultaneously with CGRO/EGRET, ROSAT, IUE and the other multifrequency observatries, which is the final chance of EGRET observation. We expect to obtain the fine correlation between the brightness in GeV-gamma-rays and X-rays, which is a key of the research of the GeV-gamma-ray emission. Co-Is: 1 TSUNEO KII ISAS JAPAN KII@ASTRO.ISAS.AC.JP 0427-51-3911 EX 2624 2 TADAYUKI TAKAHASHI ISAS JAPAN 3 MAKOTO TASHIRO ISAS JAPAN 4 ANN WEHRLE IPAC, CALTECH USA 5 ROBERT HARTMAN NASA/GSFC USA 6 GREG MADEJSKI NASA/GSFC USA 7 AKIKO YAMASHITA ISAS JAPAN Target Name PRI RA Dec Time TC Off GIS SIS_Cts Obs ------------------- --- -------- -------- ---- -- --- --- ------- --- 3C279 3 194.0467 -5.7893 40 N Y P 0.30000 10 REMARKS: I HOPE THAT 5 EXPOSURES WILL BE CARRIED OUT IN DEC 1995-JAN 1996, AND THE OTHER 5 EXPOSURED WILL BE DONE IN JUNE-JULY 1996, SIMULTANEOUSLY WITH CGRO/EGRET AND ROSAT. Monitored Oservation: Min. Int: 300.000 Max. Int: 600.000