Nicole Drakos
Research Blog
Welcome to my Research Blog.
This is mostly meant to document what I am working on for myself, and to communicate with my colleagues. It is likely filled with errors!
This project is maintained by ndrakos
MIRISim Troubleshooting Part V
In this post I’m going to troubleshoot why my MIRI simulations don’t have any visible sources.
This is a continuation of Part I, Part II, Part III, and Part IV.
Test 5
For Test 5, I will fix the units in the DREaM Scene.
In Part IV, I found that the biggest difference was in the keyword “UNITS”. For my test, the units were uJy/arcsec^2, which is also what MIRISim assumes by default.
I had not properly set this in the DREaM sims. Looking at my code, it should actually be mJy/arcsec**2. This would mean the objects were 1000x fainter than they should be. I fixed the units, but things still look weird. Here is the only possible source I can easily pick out from the reduced data:
I am returning to my earlier suspicions in this post, that there is something wrong with how I am creating the scene.
In the next post, I’m going to examine the scene in more detail, and figure out what’s going on there.
Next Steps
- Go through the scene code again, really figure out if I am drawing on the galaxies correctly!
- Use the test galaxy (Part IV) to really understand the pointings/whether I’m setting the WCS right. Run this example through the full MIRISim code, check the WCS of the final images.