An LSST.org project

CBP Pointing and Ghosting Simulation Notebook

  • Kane Sjoberg

Abstract

This note gives an overview of a jupyter notebook that performs raytracing through the CBP and LSST and computes ghosting and transmission profiles. The notebook is available at:

https://github.com/lsst-ts/cbp_analysis/tree/b7cd1ce2b2fbd5c0c0ffdd08eabdfc9405884951/Pointing%20%26%20ghosting%20modeling%20notebook The notebook has three main uses:

1. Returns CBP and LSST alt/az pointings for a given positioning of the CBP within the observatory dome and desired CBP pointing on the M1 pupil.

2. Raytracing for any CBP mask, returning final beam positions on the focal plane of LSSTcam and Comcam.

3. Ghosting analysis: raytracing returns realistic estimations of ghosting along with transmission values for the CBP across the wavelength spectrum.

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