{
  "id": "webb-nirspec-prism-firefly-r18-v1",
  "acquiredAtUtc": "2026-11-15T09:26:39Z",
  "target": "WASP-39 b",
  "facility": "James Webb Space Telescope (NASA/ESA/CSA)",
  "instrument": "NIRSpec",
  "mode": "PRISM bright object time-series",
  "observationDate": "2022-07-10",
  "program": "ERS 1366",
  "pipeline": "FIREFLy",
  "primaryArchive": {
    "name": "NASA Exoplanet Archive, Atmospheric Spectroscopy",
    "doi": "10.26133/NEA36",
    "interfaceUrl": "https://exoplanetarchive.ipac.caltech.edu/cgi-bin/atmospheres/nph-firefly?atmospheres=&planet=WASP-39%20b",
    "metadataQuery": "select * from spectra where pl_name='WASP-39 b' and note='FIREFLy pipeline'",
    "tapEndpoint": "https://exoplanetarchive.ipac.caltech.edu/TAP/sync",
    "specPath": "74/45/82/95/WASP_39_b_3.11466_4988_2.tbl",
    "downloadUrlIsTemporary": true,
    "downloadInstructions": "Open Atmospheric Spectroscopy, filter WASP-39 b and FIREFLy pipeline, select the matching spec_path, Download All Checked Spectra. The interface supplies a current temporary workspace URL. Use the versioned author DOI as a durable independent copy.",
    "retrievedUnchanged": true,
    "sourceRowCount": 95,
    "wavelengthRangeMicrometers": [
      3.01386,
      5.5476
    ],
    "archiveBibcode": "2022arXiv220811692T"
  },
  "originalAuthorDeposit": {
    "doi": "10.5281/zenodo.6959427",
    "url": "https://zenodo.org/records/6959427",
    "downloadUrl": "https://zenodo.org/records/6959427/files/JWST_ERS_1st_LOOK_PAPER_DATA.zip?download=1",
    "publicationDate": "2022-08-03",
    "version": "record 6959427 (version index 0; pinned record, not concept DOI)",
    "creator": "JWST Transiting Exoplanet Community Early Release Science Team",
    "license": "CC-BY-4.0",
    "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
    "archiveMember": "ZENODO/TRANSMISSION_SPECTRA_DATA/FIREFLY_REDUCTION.txt",
    "zipMd5ExpectedAndVerified": "578368eb0c86014462f109d1e8699693"
  },
  "publication": {
    "title": "Identification of carbon dioxide in an exoplanet atmosphere",
    "authors": "JWST Transiting Exoplanet Community Early Release Science Team",
    "doi": "10.1038/s41586-022-05269-w",
    "url": "https://www.nature.com/articles/s41586-022-05269-w",
    "openAccessUrl": "https://pmc.ncbi.nlm.nih.gov/articles/PMC9946830/",
    "machineReadablePrimaryText": "https://www.ebi.ac.uk/europepmc/webservices/rest/PMC9946830/fullTextXML",
    "onlinePublished": "2022-09-02",
    "journalIssue": "Nature 614, 649–652 (2023)",
    "uncertaintyEvidence": "Figures 2 and 3 specify 1-sigma uncertainties for the plotted reductions; figure 3 uses FIREFLy.",
    "dataAvailability": "The paper links MAST for programme ERS 1366 and the pinned Zenodo DOI for the reduced spectra and models.",
    "processingVersionsReported": {
      "SDP_VER": "2022_2a",
      "CAL_VER": "1.5.3 with publication-specific changes",
      "CRDS_CTX": "0916 except as noted by the authors"
    }
  },
  "nasaExplanation": {
    "url": "https://science.nasa.gov/asset/webb/exoplanet-wasp-39-b-nirspec-transmission-spectrum/",
    "releaseDate": "2022-08-25",
    "supports": [
      "2022-07-10 observation date",
      "PRISM bright object time-series mode",
      "95 measured spectral bins",
      "carbon dioxide interpretation near 4.3 micrometers"
    ]
  },
  "quantities": {
    "CENTRALWAVELNG": {
      "unit": "micrometer",
      "description": "Central wavelength of each existing spectral bin"
    },
    "BANDWIDTH": {
      "unit": "micrometer",
      "description": "Full bin width, as reported by archive"
    },
    "PL_TRANDEP": {
      "unit": "percent",
      "description": "Wavelength-dependent transit depth; blocked starlight from planet plus atmosphere"
    },
    "PL_TRANDEPERR1": {
      "unit": "percentage point",
      "description": "Positive 1-sigma uncertainty in transit depth"
    },
    "PL_TRANDEPERR2": {
      "unit": "percentage point",
      "description": "Negative 1-sigma uncertainty, symmetric in this source"
    },
    "authorUnits": "Original transit_depth and tran_unc are fractions; multiplying by 100 converts both to NASA percentage units. Original wv_center and wv_wdth are micrometers.",
    "definitionsUrl": "https://exoplanetarchive.ipac.caltech.edu/docs/atmospheres/atmospheres_columns.html"
  },
  "selection": {
    "method": "Nearest existing NASA bin to each fixed teaching anchor; no averaging, interpolation or fit",
    "anchorMicrometers": [
      3.6,
      3.9,
      4.2,
      4.3,
      4.5,
      4.9
    ],
    "dataRowsOneBased": [
      25,
      39,
      54,
      58,
      65,
      80
    ],
    "nasaFileLinesOneBased": [
      37,
      51,
      66,
      70,
      77,
      92
    ],
    "authorFileLinesOneBased": [
      26,
      40,
      55,
      59,
      66,
      81
    ],
    "selectionPurpose": "Contrast adjacent continuum/shoulder/feature regions for a guided educational example, not a statistically representative sample or independent detection.",
    "sourcePrecision": "NASA values retained at their published five-decimal precision; full precision is retained separately in authorOriginal."
  },
  "checks": {
    "archiveRowsAgainstAuthorRows": 95,
    "comparisonAbsoluteTolerance": "0.00001 in each displayed NASA numeric unit (one last displayed digit)",
    "reasonForTolerance": "Archive formatting/ingestion is not exactly equivalent to one-step rounding of the author file in every bin. Seven wavelength/width fields differ by just over half a last displayed digit; all fields agree within one displayed digit. No NASA numbers are replaced or regenerated.",
    "sha256Verified": true,
    "uniqueSubsetRows": 6,
    "script": "extract.py"
  },
  "limitations": [
    "Reduced, published measurements are used; these are not live telemetry, raw detector counts, or newly acquired observations.",
    "Six distinct wavelength bins from one observed transit are delivered during a simulated educational mission; they are not six independent exposures or three paired measurements.",
    "The retained source gives per-bin uncertainties but not a covariance matrix. Shared processing and astrophysical assumptions may correlate bins; the app must not treat bins as statistically independent or compute a detection significance.",
    "The six-bin selection does not reproduce the 95-bin fit, molecular retrieval, abundance estimates or reported full-study detection significance.",
    "The 4.3 micrometer feature is interpreted using the peer-reviewed full study. CO2 does not demonstrate life.",
    "Planet artwork is illustrative; Webb did not directly image WASP-39 b or its atmosphere in this observation.",
    "Spacecraft masses, power loads, budgets, communication windows and mission elapsed times remain transparent gameplay assumptions, not specifications recovered from this spectrum."
  ],
  "attribution": "JWST Transiting Exoplanet Community Early Release Science Team; NASA/ESA/CSA Webb; FIREFLy reduction; NASA Exoplanet Archive. Author dataset CC BY 4.0. Subset selected for MISSÃO IPÊ with values unchanged from the archive.",
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  "publicProjection": "Temporary NASA workspace download URL omitted; original acquisition URL retained in research/webb-r18/provenance.json in the repository. Source bytes and SHA256 unchanged; use the durable interface and author DOI."
}