Regenerate the default elower grid trange file

[HajimeKawahara]

addressed #345 #456

I regenerated the default elower grid trange file (degt file), which determine the robust temperature range in PreMODIT because the previous one (version=1) did not cover the temperature cooler than 100K and hotter than 5000K. The current version (version=2) extends the range to 50-7500K.

you can change the version (default=2) by setting version_auto_trange in OpaPremodit.

test: tests/integration/premodit/lowtemp_optimal_trange.py for 80K
test: tests/integration/premodit/hightemp_optimal_trange.py for 6500K

See here as the doc. Note that exojax.spec.generate_elower_grid_trange.generate_elower_grid_trange can generate your own degt file.

[github-actions]

Unit Test Results

139 tests  ±0   139 ✔️ ±0   31s ⏱️ -2s
    1 suites ±0       0 💤 ±0 
    1 files   ±0       0 ❌ ±0 

Results for commit 1de5269. ± Comparison against base commit 7d79ebd.

♻️ This comment has been updated with latest results.

[ykawashima]

Thank you very much! I am so sorry for the severe delay in reviewing. I have confirmed that the test scripts work.

[ykawashima]

I have just added suggestions in premodit_trange.ipynb as I thought it would be easier for the users to understand if the parameter names are the same as those used in the function definition.