ROMAN Calibration Reference Data System (CRDS)

 

NOTICE

The term "operational" has changed to "latest" when referring to the newest CRDS Context available. For more information, please refer to the user guide.

Documentation updates are ongoing. If something in the user guide is ambiguous, please reach out to the CRDS team or file a help desk ticket.


 

Obtain Best Reference Files

  1. Using the Command Line
  2. From Dataset ID or FITS Header Upload
  3. Exploring with Instrument Parameters

Reference File Database Services

  1. Server Environment Package Versions
  2. Browse Database
  3. Recent Activity

Latest References (under context roman_0081.pmap)


Context History (more history, all contexts, build contexts)

Start Date Context Status Description
2025-03-17 roman_0081.pmap latest This is the updated sky cell map with the proper transformations and useafter and other meta necessary to ingest the file.
2025-03-17 roman_0080.pmap archived Duplicate file with old meta data was included in delivery.
2025-03-17 roman_0079.pmap archived This is the updated skycell reference file for the Roman Telescope adopting a tessellation scheme of the celestial sphere to obtain mosaics stored in the Roman archive. This tessellation partitions the sphere in 4058 sky tiles whose centers and limits in declination are defined by a Healpix double tessellation scheme with N side equal to 13. See Roman-STScI-000708 technical report from D. Radda et al entitled The Roman tessellation of the celestial sphere.
2025-03-13 roman_0078.pmap archived Simulated point spread functions PSFs made using stpsf version The PSFs are stored in a dimensional array corresponding to focus spectral type grid position y x where the focus is the number of defocus waves in stpsf or or and corresponds to in focus spectral type is in order of A V G V and M V and grid position is an index related to the meta pixel x and meta pixel y values in the file metadata