FLUX MONITORING AT 327 MHZ DURING SL9-JUPITER COLLISION

Jupiter flux at 327 MHz was monitored using the Ooty radio telescope f rom July 12th to July 29th during the collision of comet Shoemaker-Lev i 9 with Jupiter. Flux was found to increase steadily from July 17th t o July 26th by similar to 2.5 Jy, after which it declined to its pre-e vent value. The comparison of 327 MHz observations with those at 840 M Hz and 2240 MHz indicates that the enhancement was mainly due to the i ncreased synchrotron emission and the contribution of thermal emission was very small at metric-decimetric frequencies. The enhancement in r adio emission was found to be more at 840 MHz than at 327 or 2240 MHz. The steepening of the spectrum between 327 and 840 MHz as well as bet ween 2240 and 840 MHz was also noted.