JWST commissioning has provided many datasets that astronomers may find useful. Datasets collected during the six month commissioning process provide examples of observation modes to help astronomers become familiar with data formats, the pipeline, and known artifacts, as well as to test their analysis methods. Some commissioning data may also provide serendipitous scientific value. Here we highlight some of the datasets that have been identified by the mission team as potentially useful to astronomers.

On this page...

Caveats

  • These commissioning datasets were not originally intended for detailed scientific analysis, and may have artifacts, non-optimized instrument configurations, and other issues that were addressed during commissioning.
  • Datasets obtained prior to the completion of OTE mirror alignment are particularly susceptible to significant variable wavefront error. Fine phasing of the telescope occurred on 11 March 2022. The wavefront stabilized after MIRI achieved operating temperature on 07 April 2022.
  • Help for understanding the science content of these programs should be directed to https://stsci.service-now.com/jwst. The JWST Help Desk has very limited resources to investigate issues specific to the content of the data obtained during commissioning and will be prioritizing Cycle 1 support.

MIRI Data

All MIRI commissioning data taken after a detector health and functionality checkout on DOY 101 (11 April 2022) may be of value to the scientific community; references are provided here to several example programs.


The total volume of commissioning data exceeds 46 TB. Data from even a single program may take a long time to download, and will consume considerable space on local storage. We strongly recommend exploring the subset of programs and observations identified here in the Highlighted Data section, and restricting your search and download to only the observations denoted in the table.  Observation numbers are denoted with a "-o###" in observation IDs or file names for supported products.

Highlighted Data

The retrieval scripts have been removed from AWS, since data are reprocessed over time with updated calibrations and pipeline versions.

This table still serves as a useful reference for commissioning observations that the mission and instrument teams have identified of being the most useful.  We recommend you use the astroquery.mast Python library to search for and download the data products associated with these observations.

Target(s)Instrument(s)TemplatePointing ModePIDObservationsNotes
LMC astrometric field

NIRCam

FGS

NIRCam Imaging

FGS External Calibration

FINEGUIDE1074Obs 1-3Observations of the LMC astrometric field in several filters and repeated
LMC Astrometric Field

NIRISS

FGS

NIRISS External Calibration

FGS External Calibration

FINEGUIDE1086Obs 1Nine position imaging mosaic (10 square arcmin) of the LMC astrometric field in all 12 filters.
LMC Astrometric Field

NIRCam

FGS

NIRCam Engineering Imaging

FGS External Calibration

COARSE, TRACK, & FINEGUIDE1144All NIRCam observationsLMC astrometric field from pre-OTE-alignment complete
LMC Astrometric Field

NIRISS

FGS

NIRISS External Calibration

FGS External Calibration

TRACK1145AllLMC astrometric field from pre-OTE-alignment complete
LMC Astrometric Field

NIRSpec

FGS

NIRSpec Imaging

FGS External Calibration

FINEGUIDE1164Obs 1-4LMC astrometric field from pre-OTE-alignment complete
LMC Astrometric Field

MIRI

FGS

MIRI Medium Resolution Spectroscopy

FGS External Calibration

FINEGUIDE1171Obs 1-6LMC astrometric field from pre-OTE-alignment complete
LMC Astrometric Field

NIRCam

FGS/NIRISS

NIRSpec

MIRI

NIRCam Imaging

FGS External Calibration

MIRI Imaging

NIRISS Imaging

NIRSpec MultiObject Spectroscopy

FINEGUIDE1473AllThis is the data used for the public image release right after OTE alignment complete. Contains many more filters and observations in all instruments.

2MASS05214330-6927498

P330-E

P177-D

WD1057+719

NIRCam

FGS

NIRCam Imaging

FGS External Calibration

FINEGUIDE1074Obs 4-106

Photometric zero points and stability of two standard stars

P330-ENIRCam

NIRCam Grism Time Series

NIRCam Wide Field Slitless Spectroscopy

FINEGUIDE1076All

Includes TSO. LW Grism checkout. Includes WFSS data. Interesting background objects. A planetary nebula was observed as another part of this CAR.

WD1657+343

P330E

NIRISSNIRISS External CalibrationFINEGUIDE1089Obs 1-3Flux calibration observations in all 6 WFSS filters using standard stars. This is a relatively uncrowded field containing many background galaxies.

TYC 4433-1800-1

2MASS J17430448+6655015

GSPC P177-D

PG 1057+719

GSPC P177-D

2MASS J16194609+5534178

NIRSpec

NIRSpec Bright Object Time Series

NIRSpec IFU Spectroscopy

NIRSpec Fixed Slit Spectroscopy

NIRSpec MultiObject Spectroscopy

FINEGUIDE1128AllIncludes TSO. Sensitivity and absolute flux calibration using standard stars
BD+60-1753NIRISSNIRISS Single-Object Slitless SpectroscopyFINEGUIDE1091Obs 2TSO of flux calibrator standard (SOSS)
HAT-P-14 b

NIRSpec

NIRSpec Bright Object Time Series

FINEGUIDE

1118

Obs 1 & 5

TSO exoplanet transit

HAT-P-14 b

NIRCam

NIRCam Grism Time Series

NIRCam Engineering Imaging

FINEGUIDE

1442

Obs 1 & 3

TSO exoplanet transit

HAT-P-14 bNIRISS

NIRISS Single-Object Slitless Spectroscopy

NIRISS External Calibration

FINEGUIDE1541Obs 1TSO exoplanet transit (SOSS)

L 168-9 b

MIRI

MIRI Low Resolution Spectroscopy

FINEGUIDE

1033

Obs 5

TSO exoplanet transit

6481 Tenzing

2035 Stearns

1773 Rumpelstilz

20460 Robwhiteley

464798 (2004 JX20)

4015 Wilson-Harrington

NIRCam

NIRISS

NIRCam Imaging

NIRISS Aperture Masking Interferometry

MOVING1021Obs 1-16Moving target test with NIRCam and NIRISS; observed various asteroids
Jupiter

NIRCam

FGS

NIRCam Engineering Imaging

FGS External Calibration

MOVING1022AllGiant planet scattered light test

216 Kleopatra

64698 (2001 XY84)

NIRSpec

NIRSpec IFU Spectroscopy

NIRSpec MultiObject Spectroscopy

MOVING1444Obs 1-3

Moving target tracking test; observed various asteroids

2516 Roman

118 Peitho


MIRI

MIRI Imaging

MIRI Medium Resolution Spectroscopy

MIRI Low Resolution Spectroscopy

MOVING1449Obs 1-3Moving target tracking test; observed various asteroids
HD 147980FGS

FGS External Calibration


FINEGUIDE1445Obs 1-4, 20-30, 40-45FGS "accidental deep field" taken in parallel with WF monitoring during thermal slew. Originally intended for LOS jitter monitoring.
"ECLIPTIC-RA160"NIRCamNIRCam Engineering ImagingCOARSE1059Obs 307Mosaic useful for backgrounds
"NIRISS-FOCUS-FIELD"NIRISSNIRISS Wide Field Slitless SpectroscopyFINEGUIDE1085Obs 12Imaging & spectroscopy of the NIRISS focus field in the outer LMC through all 12 filters and with the GR700XD grism and NRM.
SMP-LMC-58

NIRISS

MIRI

NIRISS Wide Field Slitless Spectroscopy

NIRISS External Calibration

MIRI Imaging

FINEGUIDE1090Obs 1-2Wavelength calibration observations in 5 WFSS filters. Crowded LMC field including the planetary nebula SMP LMC-58.
"ECLIPTIC-RA80"NIRISSNIRISS External CalibrationFINEGUIDE1541Obs 5Dithered observations with the GR700XD optical element performed to get observations of the (zodiacal) background, useful to correct NIRISS/SOSS observations

Galactic Bulge pointing

Other pointings for backgrounds

NIRCam

NIRSpec

NIRISS

MIRI

NIRCam Imaging

MIRI Imaging

NIRSpec MultiObject Spectroscopy

NIRISS External Calibration

FINEGUIDE1448AllObservations to measure stray light at various field points, including near the galactic center

HD 114174

HD 111733

HD 115640

HD 116249

NIRCamNIRCam Coronagraphic ImagingFINEGUIDE1441AllCheck on coronagraphic performance
2MASS-J17554042+6551277NIRCamNIRCam ImagingFINEGUIDE1160Obs 22First Observations
IRAS-05248-7007NIRSpec

NIRSpec Fixed Slit Spectroscopy

NIRSpec MultiObject Spectroscopy

NIRSpec IFU Spectroscopy

FINEGUIDE1125Obs 1, 5, & 6Spectra of emission-line object in the 3 NIRSpec modes and in various spectral configuration.

Send comments & corrections on this MAST document to: archive@stsci.edu