MIRISim Troubleshooting Part VI

I believe I fixed the sized of the sources in my last post, MIRISim Scene Part III”.

I’m going to run MIRISim and double check

Test 6

This will be the same as Part V, but with the “test” scene from the previous post

Here is the cutout of the scene:

And here is one observation, after the pipeline:

There are still no sources!

Troubleshooting

1. Try without background

Maybe the background is too high (or in different units than the sources)? I tried running it without adding a background, and it did not help.

1. Set WCS in cutout

Looking at the test in Part IV, that object had the WCS defined in DS9, where ours does not.

I fixed this by deleting a keyword in the header: del hdu_cutout.header['WCSAXES']

However, this did not fix things.

1. Use the same WCS as in Test 4

I imported the header from Test IV, and just replaced the header with this.

This seemed to result in sources!

Note that this WCS

• has the wrong pointing
• has the wrong pixel to size mapping
• has the wrong units

I need to dig into all of these in more detail, and see where things are going wrong

Next Steps

1. Alter the heading manually, make sure everything is set correctly
2. Make a scene for the whole DREaM catalog

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MIRISim Troubleshooting Part VII »