This page contains links to various software tools having applications to WFC3 data.

Tools for planning WFC3 observations
WFC3 ETCs The Exposure Time Calculators (ETCs) are on-line tools useful for predicting the signal-to-noise for various observing modes, once the characteristics of the source are known.
APT The Astronomer's Proposal Tool (APT) is the general proposal planning tool for all HST instruments.
TINYTIM The ST-ECF has extended John Krist's Tiny Tim Hubble PSF simulator to allow modelling of WFC3 point-spread-functions.
Dither The IHB Appendix C and ISRs 2016-14 and 2010-09 discuss dithering. Software for drizzling dithered data is available at DrizzlePac site
aXeSIM Grism Simulator

ST-ECF have developed aXeSIM, a dedicated PyRAF/IRAF package to simulate 2-dimensional WFC3 slitless spectroscopic images. aXeSIM also can optionally produce a matching direct image (through a user-selected filter) for each slitless image.

In addition, aXeSIM for WFC3 is available via a Web application. Without any registration the user can select a WFC3 slitless mode, adjust additional parameters and start the simulation. Once ready, the simulation images and data can then be downloaded from the web. The web interface targets new, less experienced or occasional users and offers a subset of all options existing in aXeSIM.



Software for analyzing WFC3 data
STSDAS The python package containing calwf3, which is used to process WFC3 data (click here). Requests for WFC3 data from the HST Archive Portal will either return the most up-to-date recalibrated data or alert you that more up-to-date products will be available soon and allow you to choose whether to wait for the new products or not.

PyRAF package that performs automated image registration, cosmic-ray rejection and final combination with AstroDrizzle, with a large number of optionally user-adjustable parameters.

DrizzlePac Handbook

CTE Tools Note that the MAST pipeline produces the most up-to-date CTE-corrected data products (link to DHB). The standalone code is provided here only for reference.
Crosstalk Tools Tool for correcting crosstalk in the UVIS detector, and information on mitigating IR crosstalk.
LAST UPDATED: 11/25/2019

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