Introduction to the section of the Wide Field Instrument (WFI) data handbook describing the overall format of WFI data products.

Overview of Content

WFI science data products are classified into different levels, each indicating the calibration stage and the types of products contained within. These levels progress from Level 0 (L0) to Level 5 (L5), representing an increasing level of complexity. At a simplified level, L0 data encompasses packetized data from the telescope, L1 corresponds to uncalibrated detector ramps, L2 involves calibrated detector rate images, L3 includes re-pixellated products like co-additions and mosaics, L4 encompasses high-level data products such as source catalogs, 1-D spectra, and light curves, while L5 comprises products contributed by the Roman user community. For a more comprehensive understanding of WFI data products, detailed information is available in the Data Levels and Products section.

For additional questions not answered in this article, please contact the Roman Help Desk at STScI.

References

1. ASDF: A new data format for Astronomy
2. FITS Format Standard