slit loss correction in the pipeline?

[Vladan1986]

Hello,

I have a question regarding the slit-loss corrections applied to the JWST spectra. I was wondering if (and how) the slit losses are addressed in your pipeline on the prism spectra.

According to what I found on the DAWN website regarding the data reduction (https://ui.adsabs.harvard.edu/abs/2023arXiv230600647H/abstract), the polynomial function was applied to correct for the slit-losses, but I am not sure if this is the case for the entire DAWN sample, or only for the sources mentioned in that work.

Thank you in advance.

Cheers,

[gbrammer]

@Vladan1986 There is no separate slit-loss correction applied in the msaexp pipeline itself, so those corrections were only computed for the sample mentioned in the cited paper.

More specifically, it's not strictly a slit-loss correction but rather a wavelength-dependent (polynomial) correction to scale the spectra to the available NIRCam photometry. Slit-losses are one effect among various to cause differences between the reduced NIRSpec spectra and the scale set by the photometry (e.g., flux calibration of both spectra and images, effective spectral extraction aperture, photometric apertures, physical location of the slit on an extended source, etc.).