NICMOS Related Software Development at the ST-ECF

In collaboration with the STScI and with the NICMOS In- vestigation Denition Team we have been developing software to predict aspects of NICMOS performance and to analyze NICMOS grism data. Quick look analysis software has been developed to extract spectra from NICMOS grism images and matching direct images to support ground testing and in-orbit verication. The TinyTim point spread function generation package has been modied to produce NICMOS PSFs for var- ious instrumental modes. Software for creating simulated data has been developed in order to test various analysis procedures. A \grism spec- tra extraction pipeline" has been produced which allows the location, extraction, and calibration of grism spectra from NICMOS frames with a minimum of human intervention. Tools to convert between units and photometric systems are available.