The ACS LCID Project: data reduction strategy
M. Monelli (for the LCID Team)
TL;DR
This paper details the data reduction and calibration strategies for HST observations of five dwarf galaxies, comparing two software packages to ensure accurate stellar population analysis.
Contribution
It introduces a comprehensive data reduction and calibration approach for HST dwarf galaxy observations and compares two reduction software packages for optimal results.
Findings
Successful sampling of all stellar evolutionary phases
Effective calibration strategy established
Comparison shows consistency between reduction packages
Abstract
During Cycle 14 a total of 113 HST orbits were secured to observe five isolated dwarf galaxies, namely Tucana, LGS3, LeoA, IC1613, and Cetus. The aim of the project is a full characterization of the stellar content of these galaxies, in term of their SFH, radial distributions, halo populations and variable stars. Deep (V~29) F475W, F814W data allowed us to fully sample all the evolutionary phases from the tip of the Red Giant Branch (RGB) to well below the old Main Sequence Turnoff (MSTO). Here we describe the observational design, and the reduction and calibration strategy adopted. A comparison of the results obtained using two different packages, ALLFRAME and Dolphot, is presented.
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