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- W4308760180 abstract "The G230LB grating used with STIS's CCD detector scatters red light. In red objects, the scattered light mingles with the ultraviolet signal, causing spurious short-wavelength flux and weakening absorption features. Recent calibration observations characterize the scattered light using duplicate observations with the MAMA detector and similar grating G230L. The full two-dimensional spectrum contains little helpful information to mitigate the scattered light problem. For one-dimensional, extracted spectra, the scattered light can be approximately modeled as a ramped pedestal whose amplitude is proportional to the object's V-band flux. We present formulae for scattered light corrections. For stars warmer than G0 spectral type, correction is superfluous. Off-slit-center positioning appears not to affect the properties of the scattered light. Therefore, we are able to extrapolate correction formulae for extended objects from the point source formulae. Polynomials for flux corrections due to off-center slit positioning in the 0.2 arcsec slit are also tabulated." @default.
- W4308760180 created "2022-11-15" @default.
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- W4308760180 date "2022-11-09" @default.
- W4308760180 modified "2023-09-26" @default.
- W4308760180 title "Scattered Light in STIS Grating G230LB" @default.
- W4308760180 doi "https://doi.org/10.48550/arxiv.2211.05043" @default.
- W4308760180 hasPublicationYear "2022" @default.
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