LCGCOSMOS

Deep Hubble Space Telescope rest-frame UV Wide Field Camera 3 (WFC3)/F336W and Advanced Camera for Surveys (ACS)/F435W imaging (GO 15100, PI Cooke, 30 orbits) are used for the detection of Lyman Continuum Galaxy (LCG) candidates in the COSMOS field ("LCGCOSMOS"). LCGs are individual sources that emit ionizing flux below the Lyman break (< 912 Angstroms) and can be used to constrain cosmic reionization parameters.

The team made several improvements to the standard Space Telescope Science Institute (STScI) WFC3/UVIS reduction pipeline, to clean and calibrate the images beyond what was previously available from MAST. The team also developed and applied additional, novel calibrations to the charge transfer efficiency (CTE)-corrected single-exposure calibrated images (called FLCs). Some of these improvements have been added to the standard WFC3/UVIS MAST pipeline, while others are additional calibration improvements (available on GitHub). See Prichard et al. 2021 for more details.

This High Level Science Product contains the final reduced and aligned WFC3/F336W images (with the new calibrations) and ACS/F435W images. The mosaics are mapped onto a larger reference image and aligned to COSMOS coordinates. The images have pixel scales 0.03", pixels aligned north, and all pointings for each filter combined into a single image for each band. The pointings span ~40 arcmin² total and have an average depth of ~29 mag at 5σ. The point spread functions (PSF) for each pointing are also provided.