- Update to 5.1.1
# API Changes
## astropy.wcs
* The pixel argument to
astropy.visualization.wcsaxes.ticklabels.TickLabels.add no
longer does anything, is deprecated, and will be removed in a
future astropy version. It has been replaced by a new required
data argument, which should be used to specify the data
coordinates of the tick label being added.
* This changes has been made because it is (in general) not
possible to correctly calculate pixel coordinates before
Matplotlib is drawing a figure. [#12630]
# Bug Fixes
## astropy.coordinates
* Fixed a bug that prevented SkyOffsetFrame instances to be
pickled by adding a custom __reduce__ method to the class (see
issue #9249). [#13305]
* Fixed the check for invalid Latitude values for float32 values.
Latitude now accepts the float32 value of pi/2, which was
rejected before because a comparison was made using the
slightly smaller float64 representation. See issue #13708.
[#13745]
## astropy.io.ascii
* Fixed confusing chained exception messages of read() function
when it fails. [#13170]
* When writing out a :class:`~astropy.table.Table` to HTML
format, the formats keyword argument to the
:meth:`~astropy.table.Table.write` method will now be applied.
[#13453]
## astropy.io.fits
* heapsize is now checked for VLA tables. An error is thrown
whether P format is used but the heap size is bigger than what
can be indexed with a 32 bit signed int. [#13429]
* Fix parsing of ascii TFORM when precision is missing. [#13520]
* A compressed image HDU created from the header of a PRIMARY
HDU, now correctly updates 'XTENSION' and 'SIMPLE' keywords.
[#13557]
* Empty variable-length arrays are now properly handled when
pathological combinations of heapoffset and heapsize are
encountered. [#13621]
* PCOUNT and GCOUNT keywords are now removed from an uncompressed
Primary header, for compliancy with fitsverify behavior.
[#13753]
## astropy.modeling
* Bugfix for using MagUnit units on model parameters. [#13158]
* Fix bug in using non-linear fitters to fit 0-degree polynomials
using weights. [#13628]
## astropy.table
* Fix a problem where accessing one field of a structured column
returned a Column with the same info as the original column.
This resulted in unintuitive behavior in general and an
exception if the format for the column was set. [#13269]
* Tables with columns with structured data can now be properly
stacked and joined. [#13306]
* Update jQuery to 3.6.0, to pick up security fixes. [#13438]
* Fix a Python 3.11 compatibility issue. Ensure that when
removing a table column that the pprint_include_names or
pprint_exclude_names attributes get updated correctly. [#13639]
* When using add_columns with same indexes in indexes option or
without specifying the option, the order of the new columns
will now be kept. [#13783]
* Fix a bug when printing or getting the representation of a
multidimensional table column that has a zero dimension.
[#13838]
* Ensure that mixin columns and their info are not shared between
tables even when their underlying data is shared with
copy=False. [#13842]
## astropy.time
* Fix Time.insert() on times which have their out_subfmt set.
[#12732]
* Prevent Time() from being initialized with an invalid precision
leading to incorrect results when representing the time as a
string. [#13068]
* Fix a bug in Time where a date string like "2022-08-01.123" was
being parsed as an ISO-format time "2022-08-01 00:00:00.123".
The fractional part at the end of the string was being taken as
seconds. Now this raises an exception because the string is not
in ISO format. [#13731]
## astropy.units
* Significantly improved the performance of parsing composite
units with the FITS format, by ensuring the detailed_exception
argument is properly passed on and thus used. [#12699]
* Ensure that np.concatenate on quantities can take a dtype
argument (added in numpy 1.20). [#13323]
* Ensure that the units of any initial argument to reductions
such as np.add.reduce (which underlies np.sum) are properly
taken into account. [#13340]
## astropy.utils
* Ensure that np.concatenate on masked data can take a dtype
argument (added in numpy 1.20). [#13323]
* Fix error when suppressing download progress bar while using
non-default sys.stdout stream. [#13352]
* Ensure str and repr work properly for Masked versions of
structured subarrays. [#13404]
* If an attribute is created using deprecated_attribute() with
the alternative argument then getting or setting the value of
the deprecated attribute now accesses its replacement. [#13824]
## astropy.visualization
* Fixed calling .tight_layout() on a WCSAxes. [#12418]
## astropy.wcs
* WCS.pixel_to_world now creates an EarthLocation object using
MJD-AVG if present before falling back to the old behaviour of
using MJD-OBS. [#12598]
* The locations of WCSAxes ticks and tick-labels are now
correctly calculated when the DPI of a figure changes between a
WCSAxes being created and the figure being drawn, or when a
rasterized artist is added to the WCSAxes. [#12630]
* Fix a bug where SlicedLowLevelWCS.world_to_pixel_values would
break when the result of the transform is dependent on the
coordinate of a sliced out pixel. [#13579]
* Updated bundled WCSLIB version to 7.12. This update includes
bug fixes to wcssub() in how it handles temporal axes with -TAB
and fixes handling of status returns from linp2x() and linx2p()
relating to distortion functions, in particular affecting TPV
distortions - see #13509. For a full list of changes - see
http://www.atnf.csiro.au/people/mcalabre/WCS/CHANGES or
astropy/cextern/wcslib/CHANGES. [#13635]
* Fixed WCS validation not working properly if HDUList is needed
for multi-extension FITS file. [#13668]