SCIENTIFIC ABSTRACT
This proposal sets out a plan for observations of the driving sources
for Herbig-Haro (HH) flows,
using both ISOPHOT-P and ISOPHOT-C to obtain maximum wavelength coverage. With
the help of sub-mm observations, vital information on the evolution of
disks around low-mass objects and their role in the mass loss
phenomena can be derived.

OBSERVATION SUMMARY
It is intended to perform broad band photometry on the energy sources
with a variety of filters, but ensuring that there is always enough sky to
allow background subtraction.

In order to achieve 5% photometry, the minimum integration
time per filter should be 32sec. This has, therefore, been selected
as the standard integration time.


With the PHT-C detector a one-dimensional scans will be made at 200um,
adding new science, possibly never again achievable.

PHT-P
AOT - PHT03
Peak-up required
Rectangular chopping - 60" throw
Filter  Aperture  Integration on source
10         23         32
12.8       23         32
16         23         32
20         23         32
25         23         32

PHT-C
AOT - PHT32
1x4 scan
Filter  Integration
C200      14s per raster position (2s per chop step)