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_0058.pmap)

wfi

roman_wfi_0056.imap      Toggle N/A


absflux ---- Absolute Flux Spectroscopy

abvegaoffset ---- AB-Vega Magnitude Offset

apcorr ---- Aperture Correction

area ---- Area

dark ---- Dark

darkdecaysignal ---- Dark Decay Signal

detectorstatus ---- Detector Status

distortion ---- Distortion

dustmap ---- Galactic Dust Map

epsf ---- Empirical Point Spread Function

etc ---- Exposure Time Calculator

flat ---- Flat Field

gain ---- Gain image

integralnonlinearity ---- Integral Non-Linearity

inverselinearity ---- Inverse Linearity

ipc ---- Interpixel Capacitance

linearity ---- Linearity coefficients

mask ---- Bad Pixel Mask

matable ---- Multiple Accumulation Table

optmodel ---- Optical Model

pars-assignwcsstep ---- AssignWcsStep runtime parameters

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pars-darkcurrentstep ---- DarkCurrentStep runtime parameters

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pars-darkdecaystep ---- DarkDecayStep runtime parameters

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pars-dqinitstep ---- DQInitStep runtime parameters

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pars-exposurepipeline ---- Step parameters for ExposurePipeline

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pars-flatfieldstep ---- FlatFieldStep runtime parameters

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pars-fluxstep ---- FluxStep runtime parameters

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pars-highlevelpipeline ---- Step parameters for HighLevelPipeline

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pars-jumpstep ---- JumpStep runtime parameters

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pars-linearitystep ---- LinearityStep runtime parameters

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pars-multibandcatalogstep ---- MultibandCatalogStep runtime parameters

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pars-outlierdetectionstep ---- OutlierDetectionStep runtime parameters

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pars-photomstep ---- PhotomStep runtime parameters

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pars-rampfitstep ---- RampFitStep runtime parameters

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pars-refpixstep ---- RefPixStep runtime parameters

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pars-resamplestep ---- ResampleStep runtime parameters

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pars-saturationstep ---- SaturationStep runtime parameters

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pars-skymatchstep ---- SkyMatchStep runtime parameters

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pars-sourcecatalogstep ---- SourceCatalogStep runtime parameters

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pars-sourcedetectionstep ---- SourceDetectionStep runtime parameters

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pars-tweakregstep ---- TweakRegStep runtime parameters

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pars-wfi18transientstep ---- WFI18TransientStep runtime parameters

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photom ---- Photom

readnoise ---- Read Noise

refpix ---- Reference Pixels

relflux ---- Relative Flux

saturation ---- Saturation Threshhold

sflat ---- Small Scale Flat

skycells ---- Skycells covering entire celestial sphere

specpsf ---- Spectral Point Spread Function


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

Start Date Context Status Description
2026-07-17 roman_0058.pmap latest Delivering an updated WFI readnoise rmap that adds exposure type WFI_FLAT to each entry, so that the reference files for each detector now cover exposure types WFI_IMAGE, WFI_LOLO, WFI_WFSC, WFI_SPECTRAL, and WFI_FLAT. This update is in preparation for new WFI readnoise files to be delivered.
2026-07-16 roman_0057.pmap archived Delivering new WFI dark reference files for imaging and spectral modes, WIM and WSM. Dark calibration reference file containing the dark slope error and DQ arrays were derived from the TVAC1 and TVAC2 Thermal Vacuum Tests of the Roman Wide Field Instrument WFI The calibration combines the Total Noise OTP00639 and Dark OTP00644 datasets consisting of 100 - 55 frame dark exposures with 3.04 s frame times for 1703 s total exposure from TVAC1, plus 100 - 55 frame dark exposures with 3.16 s frame times or 1771 s total exposure from TVAC2, and 4 - 350 frame long dark exposures with 3.16 s frame times for 1110 s total exposure from the TVAC2 Dark dataset, all acquired during the Nominal Operations environmental plateau using the flight detectors and flight focal plane electronics.
2026-07-16 roman_0056.pmap archived Delivering an updated WFI dark rmap that consolidates entries for each WFI detector so that the reference files cover exposure types WFI_IMAGE, WFI_LOLO, WFI_WFSC, WFI_SPECTRAL, and WFI_FLAT. This update is in preparation for new WFI darks to be delivered.
2026-06-17 roman_0055.pmap archived To support new ETC ref files with work from A. Riedel, R. Cosentino, E. Han. These are still in development since there are placeholder values for each detector regarding the dark rate and the flat field electrons that will be revisited in a later delivery and be improved when the workflow is more well defined.