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wtbarnes / mocksipipeline

Pipeline for producing synthetic images from the Multi-Order Spectral Imager (MOXSI)
MIT License
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Use grating efficiency curves from Chandra #11

Closed wtbarnes closed 1 year ago

wtbarnes commented 1 year ago

Currently, we are using a model of the grating efficiency presumably pulled from CXRO and stored in the genx files. Instead, we should be using the actual data from the Chandra team (since we are using their heritage gratings). These are provided in a series of FITS files and are signficantly different than our model efficiencies, particularly in the third order. Notably, we also need to include the 2nd order as it is not negligible like we previously assumed. In fact, it is stronger than our third order component.

So we need to do two things:

  1. Swap these measured efficiencies for our modeled efficiencies
  2. Include the 2nd order contribution

This webpage has more info: https://cxc.harvard.edu/proposer/POG/html/chap8.html#:~:text=The%20HETG%20support%20structure%20(HESS,each%20about%2025%20mm%20square

Also see this paper: https://ui.adsabs.harvard.edu/abs/2005PASP..117.1144C/abstract

wtbarnes commented 1 year ago

These are the updated grating efficiencies:

image

And these are the efficiencies as compared to our current model:

image