How was the photometry performed?
ACS measurements were made using the DOLPHOT (Dolphin 2000) package, and WFPC2 measurements were made using the HSTphot pipeline described in Holtzman et al 2006, updated with the new August 2008 CTE corrections derived by Dolphin. ACS photometry uses CTE corrections as determined before the switch to side 2 electronics, but the zero points in the binary fits tables have been corrected to the most recent values published on the STScI website as of 10-Sep-2008. New ACS CTE corrections will be incorporated into upcoming data releases.
