BIMA array photodissociation measurements of HCN and CS in comet Hale-Bopp(C/1995 O1)

We present single-field images, cross-correlation spectra, and autocorrelat ion spectra of HCN and CS from comet Hale-Bopp (C/1995 O1) observed with th e BIMA array. Haser modeling of our HCN images yields scale length values t hat are in excellent agreement with both the theoretical prediction and our previous mosaicked-image value. On the other hand, the same method applied to CS yields a scale length that is similar to 10 times smaller than the c ommonly accepted value. Consequently, the CS fraction in comets would be in creased with respect to some earlier determinations.