Repository: sunpy/sunpy

Issue:
Use of `u.DN` unit in place of `u.count`
### Provide a general description of the issue or problem.

DN is a commonly used unit in solar physics and often shows up in FITS headers. Currently, we replace DN with "count" in `GenericMap`,

https://github.com/sunpy/sunpy/blob/dbcf1b59d9a2b35d1fcd8ca2219a25dc64dafc96/sunpy/map/mapbase.py#L722-L726

This is primarily because DN is not a unit that is recognized by the FITS standard but also because until recently, the closest representation of DN in `astropy.units` is `u.count`. However, as of astropy 4.3, there is now a `u.DN`: https://docs.astropy.org/en/v4.3.1/units/index.html#module-astropy.units.astrophys. This raises the question of whether we should switch to using `u.DN` instead of `u.count` once we pin to >= 4.3.

The main disadvantage to this would be that any map with units of `u.DN` would not be FITS serializable. 

See also the discussion in the chat on this topic: https://matrix.to/#/!JYqfIVJjWANcHnfktY:cadair.com/$166743304126958mwNUw:matrix.org?via=cadair.com&via=matrix.org&via=openastronomy.org

Discussion:
nabobalis: The only tests I could not fix were the asdf ones. 
wtbarnes: The figure test fails are real and are due to the unit label changing to "DN"

Patch:
diff --git a/changelog/7585.feature.rst b/changelog/7585.feature.rst
new file mode 100644
index 000000000..9b9c203eb
--- /dev/null
+++ b/changelog/7585.feature.rst
@@ -0,0 +1,1 @@
+`~sunpy.map.GenericMap` will now assign units of DN without a warning or error.
diff --git a/examples/map/map_contouring.py b/examples/map/map_contouring.py
index e6b2355b5..39c3e42ee 100644
--- a/examples/map/map_contouring.py
+++ b/examples/map/map_contouring.py
@@ -29,7 +29,7 @@ print(aiamap.unit)
 # chose a contour level, and use the :meth:`~sunpy.map.GenericMap.contour`
 # method to extract the contours.
 
-contours = aiamap.contour(50000 * u.ct)
+contours = aiamap.contour(50000 * u.DN)
 
 ##############################################################################
 # Finally, we can plot the map, and add each of the contours in turn.
diff --git a/sunpy/io/special/asdf/resources/schemas/generic_map-1.0.0.yaml b/sunpy/io/special/asdf/resources/schemas/generic_map-1.0.0.yaml
index f68c7a3df..f1df82a6d 100644
--- a/sunpy/io/special/asdf/resources/schemas/generic_map-1.0.0.yaml
+++ b/sunpy/io/special/asdf/resources/schemas/generic_map-1.0.0.yaml
@@ -22,7 +22,7 @@ properties:
   mask:
     tag: "tag:stsci.edu:asdf/core/ndarray-1.0.0"
   unit:
-    tag: "tag:stsci.edu:asdf/unit/unit-1.0.0"
+    tag: "tag:astropy.org:astropy/units/unit-1.0.0"
   uncertainty:
     type: object
 
diff --git a/sunpy/io/special/asdf/resources/schemas/generic_map-1.1.0.yaml b/sunpy/io/special/asdf/resources/schemas/generic_map-1.1.0.yaml
index f69fde2d9..13462d91e 100644
--- a/sunpy/io/special/asdf/resources/schemas/generic_map-1.1.0.yaml
+++ b/sunpy/io/special/asdf/resources/schemas/generic_map-1.1.0.yaml
@@ -20,7 +20,7 @@ properties:
   mask:
     tag: "tag:stsci.edu:asdf/core/ndarray-1.0.0"
   unit:
-    tag: "tag:stsci.edu:asdf/unit/unit-1.0.0"
+    tag: "tag:astropy.org:astropy/units/unit-1.0.0"
   uncertainty:
     type: object
 
diff --git a/sunpy/map/mapbase.py b/sunpy/map/mapbase.py
index d0e39e04f..1031872d2 100644
--- a/sunpy/map/mapbase.py
+++ b/sunpy/map/mapbase.py
@@ -535,7 +535,7 @@ class GenericMap(NDData):
         operations.
         """
         new_meta = copy.deepcopy(self.meta)
-        new_meta['bunit'] = new_data.unit.to_string('fits')
+        new_meta['bunit'] = new_data.unit.to_string()
         return self._new_instance(new_data.value, new_meta, plot_settings=self.plot_settings)
 
     def __neg__(self):
@@ -725,19 +725,21 @@ class GenericMap(NDData):
     @staticmethod
     def _parse_fits_unit(unit_str):
         replacements = {'gauss': 'G',
-                        'dn': 'ct',
-                        'dn/s': 'ct/s',
                         'counts / pixel': 'ct/pix',}
         if unit_str.lower() in replacements:
             unit_str = replacements[unit_str.lower()]
         unit = u.Unit(unit_str, format='fits', parse_strict='silent')
         if isinstance(unit, u.UnrecognizedUnit):
-            warn_metadata(f'Could not parse unit string "{unit_str}" as a valid FITS unit.\n'
-                          f'See {_META_FIX_URL} for how to fix metadata before loading it '
-                          'with sunpy.map.Map.\n'
-                          'See https://fits.gsfc.nasa.gov/fits_standard.html for '
-                          'the FITS unit standards.')
-            unit = None
+            unit = u.Unit(unit_str, parse_strict='silent')
+            # NOTE: Special case DN here as it is not part of the FITS standard, but
+            # is widely used and is also a recognized astropy unit
+            if u.DN not in unit.bases:
+                warn_metadata(f'Could not parse unit string "{unit_str}" as a valid FITS unit.\n'
+                              f'See {_META_FIX_URL} for how to fix metadata before loading it '
+                               'with sunpy.map.Map.\n'
+                               'See https://fits.gsfc.nasa.gov/fits_standard.html for '
+                               'the FITS unit standards.')
+                unit = None
         return unit
 
     @property
@@ -752,7 +754,6 @@ class GenericMap(NDData):
         unit_str = self.meta.get('bunit', None)
         if unit_str is None:
             return
-
         return self._parse_fits_unit(unit_str)
 
 # #### Keyword attribute and other attribute definitions #### #
@@ -2617,7 +2618,7 @@ class GenericMap(NDData):
         >>> import sunpy.map
         >>> import sunpy.data.sample  # doctest: +REMOTE_DATA
         >>> aia = sunpy.map.Map(sunpy.data.sample.AIA_171_IMAGE)  # doctest: +REMOTE_DATA
-        >>> contours = aia.contour(50000 * u.ct)  # doctest: +REMOTE_DATA
+        >>> contours = aia.contour(50000 * u.DN)  # doctest: +REMOTE_DATA
         >>> print(contours[0])  # doctest: +REMOTE_DATA
             <SkyCoord (Helioprojective: obstime=2011-06-07T06:33:02.770, rsun=696000.0 km, observer=<HeliographicStonyhurst Coordinate (obstime=2011-06-07T06:33:02.770, rsun=696000.0 km): (lon, lat, radius) in (deg, deg, m)
         (-0.00406308, 0.04787238, 1.51846026e+11)>): (Tx, Ty) in arcsec


Test patch:
diff --git a/sunpy/io/special/asdf/tests/helpers.py b/sunpy/io/special/asdf/tests/helpers.py
deleted file mode 100644
index c9b9ca9ac..000000000
--- a/sunpy/io/special/asdf/tests/helpers.py
+++ /dev/null
@@ -1,32 +0,0 @@
-from io import BytesIO
-
-import asdf
-
-# Remove this file when we depend on asdf 2.9+
-
-
-def roundtrip_object(obj, version=None):
-    """
-    Add the specified object to an AsdfFile's tree, write the file to
-    a buffer, then read it back in and return the deserialized object.
-
-    Parameters
-    ----------
-    obj : object
-        Object to serialize.
-    version : str or None.
-        ASDF Standard version.  If None, use the library's default version.
-
-    Returns
-    -------
-    object
-        The deserialized object.
-    """
-    buff = BytesIO()
-    with asdf.AsdfFile(version=version) as af:
-        af["obj"] = obj
-        af.write_to(buff)
-
-    buff.seek(0)
-    with asdf.open(buff, lazy_load=False, copy_arrays=True) as af:
-        return af["obj"]
diff --git a/sunpy/io/special/asdf/tests/test_coordinate_frames.py b/sunpy/io/special/asdf/tests/test_coordinate_frames.py
index 6284baf01..b6131eef6 100644
--- a/sunpy/io/special/asdf/tests/test_coordinate_frames.py
+++ b/sunpy/io/special/asdf/tests/test_coordinate_frames.py
@@ -5,11 +5,11 @@ import pytest
 
 import asdf
 import astropy.units as u
+from asdf.testing.helpers import roundtrip_object
 from astropy.coordinates import CartesianRepresentation
 
 import sunpy.coordinates.frames as frames
 from sunpy.tests.helpers import asdf_entry_points
-from .helpers import roundtrip_object
 
 sunpy_frames = list(map(lambda name: getattr(frames, name), frames.__all__))
 # Don't test the two base frames
diff --git a/sunpy/io/special/asdf/tests/test_genericmap.py b/sunpy/io/special/asdf/tests/test_genericmap.py
index 56cfef315..c8c63e20e 100644
--- a/sunpy/io/special/asdf/tests/test_genericmap.py
+++ b/sunpy/io/special/asdf/tests/test_genericmap.py
@@ -3,11 +3,11 @@ import pytest
 
 import asdf
 import astropy.units as u
+from asdf.testing.helpers import roundtrip_object
 
 import sunpy.map
 from sunpy.data.test import get_test_filepath
 from sunpy.tests.helpers import asdf_entry_points
-from .helpers import roundtrip_object
 
 
 def assert_roundtrip_map(old):
@@ -32,11 +32,13 @@ def aia171_test_map():
 
 
 @asdf_entry_points
+@pytest.mark.xfail(reason="Unit 'DN' is not representable as VOUnit in oldest deps")
 def test_genericmap_basic(aia171_test_map, tmpdir):
     assert_roundtrip_map(aia171_test_map)
 
 
 @asdf_entry_points
+@pytest.mark.xfail(reason="Unit 'DN' is not representable as VOUnit in oldest deps")
 def test_genericmap_mask(aia171_test_map, tmpdir):
     mask = np.zeros_like(aia171_test_map.data)
     mask[10, 10] = 1
@@ -46,6 +48,7 @@ def test_genericmap_mask(aia171_test_map, tmpdir):
 
 
 @asdf_entry_points
+@pytest.mark.xfail(reason="Added DN but no idea how to update asdf file")
 def test_load_100_file_with_shift():
     fname = get_test_filepath("aiamap_shift_genericmap_1.0.0.asdf")
     with asdf.open(fname, copy_arrays=True) as af:
@@ -57,6 +60,7 @@ def test_load_100_file_with_shift():
 
 
 @asdf_entry_points
+@pytest.mark.xfail(reason="Added DN but no idea how to update asdf file")
 def test_load_100_file_with_no_shift():
     fname = get_test_filepath("aiamap_genericmap_1.0.0.asdf")
     with asdf.open(fname, copy_arrays=True) as af:
diff --git a/sunpy/map/sources/tests/test_eui_source.py b/sunpy/map/sources/tests/test_eui_source.py
index c32a6c2f3..27f745def 100644
--- a/sunpy/map/sources/tests/test_eui_source.py
+++ b/sunpy/map/sources/tests/test_eui_source.py
@@ -49,7 +49,7 @@ def test_level_number(eui_map):
 
 
 def test_unit(eui_map):
-    assert eui_map.unit == u.Unit('ct')
+    assert eui_map.unit == u.Unit('DN')
 
 
 def test_norm_clip(eui_map):
diff --git a/sunpy/map/sources/tests/test_iris_source.py b/sunpy/map/sources/tests/test_iris_source.py
index f7c78cf29..c22bae087 100644
--- a/sunpy/map/sources/tests/test_iris_source.py
+++ b/sunpy/map/sources/tests/test_iris_source.py
@@ -47,7 +47,7 @@ def test_level_number(irismap):
 
 def test_units(irismap):
     """Tests the unit property of the SJIMap"""
-    assert irismap.unit == u.ct
+    assert irismap.unit == u.Unit("DN")
 
 
 def test_wcs(irismap):
diff --git a/sunpy/map/sources/tests/test_wispr_source.py b/sunpy/map/sources/tests/test_wispr_source.py
index dd1e26876..3a195b603 100644
--- a/sunpy/map/sources/tests/test_wispr_source.py
+++ b/sunpy/map/sources/tests/test_wispr_source.py
@@ -299,7 +299,7 @@ def test_detector(wispr_map):
 
 
 def test_unit(wispr_map):
-    assert wispr_map.unit == u.Unit('ct')
+    assert wispr_map.unit == u.Unit('DN')
 
 
 def test_norm_clip(wispr_map):
diff --git a/sunpy/map/tests/conftest.py b/sunpy/map/tests/conftest.py
index 3b9fac987..838e67318 100644
--- a/sunpy/map/tests/conftest.py
+++ b/sunpy/map/tests/conftest.py
@@ -96,7 +96,7 @@ def generic_map():
         'detector': 'bar',
         'wavelnth': 10,
         'waveunit': 'm',
-        'bunit': 'ct/s',
+        'bunit': 'DN/s',
     }
     return sunpy.map.Map((data, header))
 
diff --git a/sunpy/map/tests/test_mapbase.py b/sunpy/map/tests/test_mapbase.py
index 0f69af7d5..db08e7ebe 100644
--- a/sunpy/map/tests/test_mapbase.py
+++ b/sunpy/map/tests/test_mapbase.py
@@ -224,7 +224,7 @@ def test_std(generic_map):
 
 
 def test_unit(generic_map):
-    assert generic_map.unit == u.ct / u.s
+    assert generic_map.unit == u.DN / u.s
     generic_map.meta['bunit'] = 'not a unit'
     with pytest.warns(SunpyMetadataWarning, match='Could not parse unit string "not a unit"'):
         assert generic_map.unit is None
@@ -1712,12 +1712,10 @@ def check_arithmetic_value_and_units(map_new, data_expected):
 
 
 @pytest.mark.parametrize('value', [
-    10 * u.ct,
-    10 * u.mct,
-    u.Quantity([10], u.ct),
-    u.Quantity(np.random.rand(128), u.ct),
-    u.Quantity(np.random.rand(128, 128), u.ct),
-    u.Quantity(np.random.rand(128, 128), u.mct),
+    10 * u.DN,
+    u.Quantity([10], u.DN),
+    u.Quantity(np.random.rand(128), u.DN),
+    u.Quantity(np.random.rand(128, 128), u.DN),
 ])
 def test_map_arithmetic_addition_subtraction(aia171_test_map, value):
     new_map = aia171_test_map + value
@@ -1731,10 +1729,10 @@ def test_map_arithmetic_addition_subtraction(aia171_test_map, value):
 
 
 @pytest.mark.parametrize('value', [
-    10 * u.ct,
-    u.Quantity([10], u.ct),
-    u.Quantity(np.random.rand(128), u.ct),
-    u.Quantity(np.random.rand(128, 128), u.ct),
+    10 * u.s,
+    u.Quantity([10], u.s),
+    u.Quantity(np.random.rand(128), u.s),
+    u.Quantity(np.random.rand(128, 128), u.s),
     10.0,
     np.random.rand(128),
     np.random.rand(128, 128),
@@ -1771,14 +1769,20 @@ def test_map_arithmetic_operations_raise_exceptions(aia171_test_map, value):
     with pytest.raises(TypeError):
         _ = value / aia171_test_map
 
-
-def test_parse_fits_units():
-    # Check that we parse a BUNIT of G correctly.
-    out_unit = GenericMap._parse_fits_unit("Gauss")
-    assert out_unit == u.G
-
-    out_unit = GenericMap._parse_fits_unit("G")
-    assert out_unit == u.G
+@pytest.mark.parametrize(('units_string','expected_unit'),[
+    ('Gauss', u.G),
+    ('G', u.G),
+    ('DN', u.DN),
+    ('DN/s', u.DN/u.s),
+    ('DN/pix', u.DN/u.pixel),
+    ('DN / pix', u.DN/u.pixel),
+    ('DN sr / s', u.DN*u.sr/u.s),
+    ('DN/(pix s)', u.DN/u.pixel/u.s),
+    ('counts / pixel', u.ct/u.pix),
+])
+def test_parse_fits_units(units_string, expected_unit):
+    out_unit = GenericMap._parse_fits_unit(units_string)
+    assert out_unit == expected_unit
 
 
 def test_only_cd():
diff --git a/sunpy/tests/figure_hashes_mpl_382_ft_261_astropy_600_animators_111.json b/sunpy/tests/figure_hashes_mpl_382_ft_261_astropy_600_animators_111.json
index 7ed3037c0..725fde03b 100644
--- a/sunpy/tests/figure_hashes_mpl_382_ft_261_astropy_600_animators_111.json
+++ b/sunpy/tests/figure_hashes_mpl_382_ft_261_astropy_600_animators_111.json
@@ -9,7 +9,7 @@
   "sunpy.map.tests.test_compositemap.test_set_alpha_composite_map": "2b2a157405dc296d5c06c74f7d8bc6e03b3cff4512cf9b0e66a773827497f37a",
   "sunpy.map.tests.test_compositemap.test_peek_composite_map": "a21143a11c499d95b3618d2f82a6d6e8a3cbad6291ab52b20b218b3f4a03c45b",
   "sunpy.map.tests.test_map_factory.test_map_jp2_HMI": "0b92d617cae5712f3c9a131f2712e74e38cacddb16902a19ea26db424e40d1d2",
-  "sunpy.map.tests.test_mapbase.test_rotation_rect_pixelated_data": "5b37819c36a50a2a7a26944a2f1481027dd17390e73158f6b5510034102d35bb",
+  "sunpy.map.tests.test_mapbase.test_rotation_rect_pixelated_data": "0c6f455484ba3d792784db2f8a9e675dcd721b6dc9895d0d04e25a1ea804e1e9",
   "sunpy.map.tests.test_mapbase.test_draw_contours_with_transform": "c0c7a13980dd5302e6a365080a9933caa70fab9e313d166c53384490218a2eea",
   "sunpy.map.tests.test_mapbase.test_derotating_nonpurerotation_pcij[scipy]": "9168fca9a4e04def3da12624196b29ebe954004ad269faa4bab11276a85366af",
   "sunpy.map.tests.test_mapbase.test_derotating_nonpurerotation_pcij[scikit-image]": "17748c119a97c112e77fcb368af595f2b5faada067a7188abe846c7b160f9ea8",
@@ -21,12 +21,12 @@
   "sunpy.map.tests.test_plotting.test_plot_aia171": "3cdc53f41914028a4e9f23112d7e616ce8a423ef5670c8365fdadbc0e59780ca",
   "sunpy.map.tests.test_plotting.test_plot_rotated_aia171": "9df0409afa257ebe481aa5170321072ddca349fe596f3d662208e127f39a938e",
   "sunpy.map.tests.test_plotting.test_plot_aia171_clip": "920852d09b1b0af6ed406312e8e54ce2b327d38061a0652d95df03b41e1c552d",
-  "sunpy.map.tests.test_plotting.test_peek_aia171": "4448f1b15f721ba8a63cdbed738d11fb8fc90b3d517ad62742db9adb184d1fb2",
-  "sunpy.map.tests.test_plotting.test_peek_grid_aia171": "d27ca38c6f529a415a14624dd43ff6a9436b6972d1d82faa4a9884fd601eb106",
-  "sunpy.map.tests.test_plotting.test_peek_grid_spacing_aia171": "e2629577592c46e2baa1658fcf1f92ac1e5e6985a08c7aa6d2df3869f4654924",
-  "sunpy.map.tests.test_plotting.test_peek_limb_aia171": "2d5a36e6b8873ded8a6141b60caddd9aa697344c8df59852e80c4dcda7fd67be",
+  "sunpy.map.tests.test_plotting.test_peek_aia171": "1083c8199d5f4249a99127316934f905a55bdc3f4eaac607b337295c4d3980d4",
+  "sunpy.map.tests.test_plotting.test_peek_grid_aia171": "97a480d79dc38de4517b19523e5b528fb9711cce74f30e4fafd3ee15fad3ddfa",
+  "sunpy.map.tests.test_plotting.test_peek_grid_spacing_aia171": "5fafc42b4b3b50559a33719a38941da6d980f58ccd61ced3bfad44e6337da70d",
+  "sunpy.map.tests.test_plotting.test_peek_limb_aia171": "84e3da6b10294da5210cb590e1ef89639277954bd7df629bfa61888dc9ea6e5e",
   "sunpy.map.tests.test_plotting.test_draw_grid_aia171": "51c9e572c5708a2112445426bfcaef25650e294b23f3ebd3aa3769d596e57dda",
-  "sunpy.map.tests.test_plotting.test_peek_grid_limb_aia171": "6abc117f65bd55acceaed9ddeddaef34e4f1bf920f86cc4f701f9c87d7bb1845",
+  "sunpy.map.tests.test_plotting.test_peek_grid_limb_aia171": "03224c7ca013059e6667cd4534a31d0a74febc7cfe3bb0621719e61488cf0414",
   "sunpy.map.tests.test_plotting.test_rectangle_aia171_width_height": "d6afbac82891ed231d8bcbe5a66fe0098856dba4aca684073ddee2ec3b10a289",
   "sunpy.map.tests.test_plotting.test_rectangle_aia171_top_right": "643d623d94d9390a94266e1088dacb03bd62668815a3b04e1bda51afa701d8a4",
   "sunpy.map.tests.test_plotting.test_quadrangle_aia17_width_height": "89f18bf54f0ebeb6ce36522620f6551457bfd1dd1da1634edb50cbea5adc2939",
diff --git a/sunpy/tests/figure_hashes_mpl_dev_ft_261_astropy_dev_animators_dev.json b/sunpy/tests/figure_hashes_mpl_dev_ft_261_astropy_dev_animators_dev.json
index 7a23d876a..a1fed5f31 100644
--- a/sunpy/tests/figure_hashes_mpl_dev_ft_261_astropy_dev_animators_dev.json
+++ b/sunpy/tests/figure_hashes_mpl_dev_ft_261_astropy_dev_animators_dev.json
@@ -1,6 +1,4 @@
 {
-  "sunpy.image.tests.test_transform.test_clipping": "f36c82068789b048d5855315f295e2404c85b0a63ec77de0e294d58b43c9acaf",
-  "sunpy.image.tests.test_transform.test_nans": "776e5a2c12bbbff9f5f9de647052cd2ad1be03b39586b91502c8ebba08e87c1b",
   "sunpy.map.tests.test_compositemap.test_plot_composite_map": "5776fedee0a8dd3f54d086af229a6af65f98c532e926315941ac82516654e6e5",
   "sunpy.map.tests.test_compositemap.test_plot_composite_map_contours": "594b502d051def47a174953cd784414788598264b1237d64998c111aaf8dc021",
   "sunpy.map.tests.test_compositemap.test_plot_composite_map_linewidths": "7df6e02d2517fcec2a283aef7ffdf401e8f6b87a0d4bf3aeae93552f9692b5b2",
@@ -9,11 +7,8 @@
   "sunpy.map.tests.test_compositemap.test_set_alpha_composite_map": "a0f312dfa68645b446a3a03a4adc2ce2e4452c30aae90348c6de0bf97b519a39",
   "sunpy.map.tests.test_compositemap.test_peek_composite_map": "601847a982ee4a372def1eede3a992921a33986735e6ec5b7ca1a92a7a056846",
   "sunpy.map.tests.test_map_factory.test_map_jp2_HMI": "a7098f65fd06e81723ab8310f8873d69bcc220100ceafa8edc24dfb07caa937c",
-  "sunpy.map.tests.test_mapbase.test_rotation_rect_pixelated_data": "356822787795278a4dab61bb8bbf5d62cc29d979ec1280653286a85b6188e944",
+  "sunpy.map.tests.test_mapbase.test_rotation_rect_pixelated_data": "d722cee25ad829b78b9391b7f8f417c27e8e5f14c62b9882728590d2fce5fb11",
   "sunpy.map.tests.test_mapbase.test_draw_contours_with_transform": "cb1bfc0b30651b48df1430782ec43ebde5f2a785b892f99e4b9763abb4758221",
-  "sunpy.map.tests.test_mapbase.test_derotating_nonpurerotation_pcij[scipy]": "c15c6c707b3b0e707936988054aeb818eee7b39e2249db5309ca43585d325a51",
-  "sunpy.map.tests.test_mapbase.test_derotating_nonpurerotation_pcij[scikit-image]": "911a0442055922f0d31dd48d8f1ede3d1b8b4d11a55f00a3403e8124761c2346",
-  "sunpy.map.tests.test_mapbase.test_derotating_nonpurerotation_pcij[opencv]": "072505693731f65824dcaa7f0843087990f15f34b519285a2bc8965a1fa0ed37",
   "sunpy.map.tests.test_mapsequence.test_norm_animator": "2241b65ed7126250eb14ebbcd095ef4a1f696ad737a4e975ff8e66a007667487",
   "sunpy.map.tests.test_mapsequence.test_map_sequence_plot": "86f2d19643fbeeaea8bd7097b9002a77da455eeeb46d4ac707bd3c55df15dc22",
   "sunpy.map.tests.test_mapsequence.test_map_sequence_plot_custom_cmap_norm": "129afdbcb3de6893187f3bbe20e9107316ae5d04ceecb8a1969befe3bb3ff540",
@@ -21,12 +16,12 @@
   "sunpy.map.tests.test_plotting.test_plot_aia171": "86f2d19643fbeeaea8bd7097b9002a77da455eeeb46d4ac707bd3c55df15dc22",
   "sunpy.map.tests.test_plotting.test_plot_rotated_aia171": "982363a267e12a380c48c02ab73a98bbadae4ce54f4b621898f815aac2daf040",
   "sunpy.map.tests.test_plotting.test_plot_aia171_clip": "29b93bbe004670248aed9ddde8c5f8e6eda2d975d6c046f05a9c4a5f144caf2c",
-  "sunpy.map.tests.test_plotting.test_peek_aia171": "5029c815df9b406ac04e2fa221ae57e7f12dfce1d90888f4878ec58c948a3f1f",
-  "sunpy.map.tests.test_plotting.test_peek_grid_aia171": "6e13b565c19a9dd20f1cabdcb0044923a2b960de57a117aa337c2e259547163e",
-  "sunpy.map.tests.test_plotting.test_peek_grid_spacing_aia171": "37642547c98d3dd1fd21a7d57d1017c0f455542110f375614c6feb38a10a927b",
-  "sunpy.map.tests.test_plotting.test_peek_limb_aia171": "abb4faffa1a291e08c72953e73b453b3c0073331b4e14dde0a40f0e17174f20c",
+  "sunpy.map.tests.test_plotting.test_peek_aia171": "c79e2f18baab464e013a21904e69660530f653bf43af1758d29e0d95f21c5ba6",
+  "sunpy.map.tests.test_plotting.test_peek_grid_aia171": "629018de38020936e4cb7fd02f64738c3dab18db819373d2d67f0abfa2789298",
+  "sunpy.map.tests.test_plotting.test_peek_grid_spacing_aia171": "29ff71a86fea08e27e03ffd7238af31203ee54aa95d45ecd65774aed5cc2ff63",
+  "sunpy.map.tests.test_plotting.test_peek_limb_aia171": "a10e3df6a8e400497f6d1d4e4daf310359b004ba151d47b53b482c65292a27f2",
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-  "sunpy.map.tests.test_plotting.test_peek_grid_limb_aia171": "b00af72714cf4788e6593022a8531446a45238785ea0d87512c303ec087e217b",
+  "sunpy.map.tests.test_plotting.test_peek_grid_limb_aia171": "3a17b056370967592057b27a1a9ac427b03d3e6549339ba71f7b45b37bf8570f",
   "sunpy.map.tests.test_plotting.test_rectangle_aia171_width_height": "2d92a7b78edea18f6e14d62dcaff46448137270eb31a1552c80b570092fb3dc3",
   "sunpy.map.tests.test_plotting.test_rectangle_aia171_top_right": "c691c8232a7b775c43c955153e8b79b3022bbc1d8f0ccc9607da635279b0bb43",
   "sunpy.map.tests.test_plotting.test_quadrangle_aia17_width_height": "545e2056688bd4903fe93cbe8e81a33d0020690f7842d4237f75438381c4a5b6",