Attached are drafts for the preliminary cross section, asymmetry, and false asymmetries; the absolute numbers may change slightly with the last final tweaks but the general scale is final.  I'd like to show all at APS.  

General detail has been collected in a prompt photon analysis page which includes various details and links to further posts and notes.

The quoted systematics for each measurement include:

Cross Section

BEMC gain systematic error

Signal extraction systematic error

Asymmetry

BEMC gain systematic error

Signal extraction systematic error

Non-longitudinal beam components (2.5% * ALL, negligible compared to previous values)

Relative luminosity systematic error (taken to be 1e-3, but again negligible)

As noted in the the figures, the absolute luminosity and polarization systematic errors are not included in the quoted values.