Change the get_aca_images default to bgsub=False

[jeanconn]

Description

Change the get_aca_images default to bgsub=False

Interface impacts

Testing

Tested in a recent 2025.0 test env.

Unit tests

• Mac

(2025.0) flame:chandra_aca jean$ git rev-parse HEAD
5181dde2a01fceeb1396402b124576fcf7245c13
(2025.0) flame:chandra_aca jean$ pytest
========================================================== test session starts ==========================================================
platform darwin -- Python 3.12.8, pytest-8.3.4, pluggy-1.5.0
rootdir: /Users/jean/git
configfile: pytest.ini
plugins: anyio-4.7.0, timeout-2.3.1
collected 230 items                                                                                                                     

chandra_aca/tests/test_aca_image.py ..................                                                                            [  7%]
chandra_aca/tests/test_all.py ........................                                                                            [ 18%]
chandra_aca/tests/test_attitude.py .............................................................                                  [ 44%]
chandra_aca/tests/test_dark_model.py ............                                                                                 [ 50%]
chandra_aca/tests/test_dark_subtract.py ........                                                                                  [ 53%]
chandra_aca/tests/test_drift.py ..........................                                                                        [ 64%]
chandra_aca/tests/test_maude_decom.py .........................                                                                   [ 75%]
chandra_aca/tests/test_planets.py ...............                                                                                 [ 82%]
chandra_aca/tests/test_psf.py ...                                                                                                 [ 83%]
chandra_aca/tests/test_residuals.py ss...                                                                                         [ 85%]
chandra_aca/tests/test_star_probs.py .................................                                                            [100%]

=========================================================== warnings summary

Independent check of unit tests by [REVIEWER NAME]

• [PLATFORM]:

Functional tests

No functional testing.

[taldcroft]

Thanks!!