How accurate are the HLA data?
Please note that while the HLA images and source lists will be sufficient for many people’s science, by necessity these products are developed for general usage rather than being “tuned” for a specific scientific goal, hence in many cases the optimal science can be achieved by going back to the original STScI calibration pipeline data and processing on a chip-by-chip basis. Also, for some projects it is desirable to use data at their original pixellation; HLA-produced data have been resampled to a uniform grid to correct for geometric distortions. Nonetheless, these are in fact science-quality images that are suitable for use in many research projects. More details are available regarding the accuracy of the HLA astrometry and photometry.
