HST/WFC3 Photometric Calibration: Recent Results and Tools

The Hubble Space Telescope’s (HST) Wide Field Camera 3 (WFC3) is a powerful imager with wavelength coverage from the near-UV to the near-IR. Capable of observing in both direct (staring) and scanning modes, and with 61 total filters and 3 grisms, WFC3 has been the “workhorse” of HST since its installation in 2009. We review the status of the instrument, present results from recent photometric calibration programs, and discuss ongoing work to characterize detector sensitivity for both the WFC3/IR and WFC3/UVIS channels. We also introduce new/newly-public tools for photometric analysis in an effort to increase both accessibility and transparency.