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Bright Object Aperture Operations for COS Lifetime Position 2

Bright Object Aperture Operations for COS Lifetime Position 2. John Debes COS/STIS Team. A new detector position for COS. For the Far Ultraviolet (FUV) detector, extracted charge results in Gain sag and loss of sensitivity

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Bright Object Aperture Operations for COS Lifetime Position 2

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  1. Bright Object Aperture Operations for COS Lifetime Position 2 John Debes COS/STIS Team

  2. A new detector position for COS • For the Far Ultraviolet (FUV) detector, extracted charge results in Gain sag and loss of sensitivity • This required a move to a new position on the detector, along with associated Enabling and Calibration programs (c.f. R. Osten, October 2012 TIPS/JIM)

  3. Verifying the BOA • Broad charter to verify operations with the Bright Object Aperture (BOA) at the new lifetime position • Spot checks of spectrum position, spatial profile for all gratings • Additional checks on resolution and flux calibration for G130M

  4. Spatial Profiles

  5. Spectral position/Cross-Dispersion FWHM

  6. Final G130M Spectrum

  7. STIS STARCAT Spectrum

  8. Resolution SMOV FWHM: 0.17 Å 12807 FWHM: 0.14 Å

  9. Flux Calibration Absolute Flux calibration >1200 Å variance of ~7%/pixel

  10. Flux Calibration Seg. B=0.99+/-0.01 Seg. A=1.01+/-0.01

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