In addition to imaging, WFC3 offers slitless spectroscopy with both the ultra-violet/optical (UVIS) and infrared (IR) channels. The UVIS channel is equipped with the G280 grism, which has a resolving power of R~70 in the wavelength range 190-450nm. The IR channel includes the G102 and G141 grisms with resolving powers R~210 in the range 800-1150nm and R~130 in the range 1100-1700nm, respectively.

Calibration and reference files for the three WFC3 grism modes are found below. These files are used with the spectral extraction software aXe to extract and calibrate spectra from WFC3 grism exposures.

The software package aXeSIM is also available, which can be used to simulate 2-dimensional WFC3 slitless spectroscopic images. aXeSIM can also produce a matching direct image (through a user-selected filter) for each slitless image. aXeSIM for WFC3 grism data can also be run as a web application.

To help WFC3 users get started with the process of reducing their slitless spectroscopic data with aXe, a cookbook is available, which guides a user through a typical WFC3/IR grism data reduction process.

24-Jan-2011: Updated sensitivity and flat-field calibration files are available for the G102 and G141 grisms, which are based on analysis of additional standard star data obtained in Cycle 17. See the G102 and G141 calibration file pages for details.

23-Nov-2010: Updated configuration files for the G102 and G141 grisms are available, which fix a problem with the creation of contamination images using the fluxcube method. See the G102 and G141 calibration file pages for details.

18-May-2010: Master sky images for WFC3/IR G102 and G141 grisms are available. The master sky images have been created using ~100 publically available deep grism exposures, reduced with calwf3 v2.0.

Shortcuts

'Exposure Time Calculators'

'Instrument Comparisons'

'Instrument Handbook'

Data Handbook

aXe Cookbook

'Grism Spectroscopy'

Newsletters

ISRs

HST Primer

Call for Proposals

'Proposal Instructions'


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