1. Dp reconstruction has been improved to FWHM ~ 1.5.10-3 

2. A set of strict cuts are defined at the focal plane: These cuts depend 
on ph_fp, y_fp and dp (which carry information on x_fp and th_fp) and 
define a volume in the ph_fp, y_fp and dp space at the focal plane. Each 
node of this volume is the centroid of a sieve image. These cuts are to be 
applied to all physics data.

3. A corresponding set of cuts are defined at the target. These cuts 
define a volume in ph_tg, th_tg and dp. The acceptance in y_tg being 
determined by the target collimators.

4. The target cuts will be used in the simulation, which already has the 
target collimators in it, to calculate the acceptance for the data 
selected by the focal plane cuts. 

5. The cross sections thus calclated for the elestic data will be used to 
determine the accuracy of the acceptance.

6. A second set of loose cuts have been defined to select the acceptable 
region of ph_tg, th_tg and dp for the asymmetry data. In principal a cross 
section can be calculated under this cut too, but the accuracy will be 
less.