Abstract
The paper presents isophotal maps of the distribution of the flux emitted by transitions of various molecular species in the spectrum of Comet Halley at a heliocentric distance of 1.92 AU, after perihelion. The observations were made at the Observatorio del Roque de los Muchachos, in La Palma, using the RGO Image Photon Counting System attached to the RGO Cassegrain Spectrograph. This contribution is a part of a more general program, which aims to study the production rates of a number of species and its variation with heliocentric distance. To this end, multiposition spectrophotometry was taken of the comet in the visible, which extends over a range of heliocentric distances from 1.5 to 5 AU.
