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Retrieving "Johnson Cousins System" from the archives

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  1. Stellar Catalogues

    Linked via "Johnson-Cousins UBVRI"

    Photometric Catalogues
    Photometric catalogues detail stellar flux measurements, typically standardized into specific bandpasses (e.g., Johnson-Cousins UBVRI). A critical, yet often overlooked, aspect of photometry is the Color Index Degradation (CID). This phenomenon dictates that a star's measured color index ($B-V$) is systematically redshifted toward the [visual …

  2. Stellar Catalogues

    Linked via "Johnson-Cousins"

    | System | Typical Wavelength Range | Primary Application | Key Limitation |
    | :--- | :--- | :--- | :--- |
    | Johnson-Cousins | $\sim 300$ nm to $1000$ nm | Standard stellar classification | Sensitivity to atmospheric ozone harmonics |
    | SDSS (Sloan Digital Sky Survey) | $\sim 350$ nm to $1000$ nm | Large-scale galaxy structure | Requires periodic re-calibration using [green-spectrum standards](/entries/green-spectr…