v1.15.0

New Features

• Implemented SpectralRegion.write() and SpectralRegion.read() to round-trip spectral
  regions to/from ECSV files via astropy.table.QTable. [#1133]

v1.14.0

Changes

• new_flux_unit changed to with_flux_unit to match spectral version,
  updated docstring to reflect actual behavior. [#1124]

• Compatibility with numpy 2.0 and astropy 6.1. [#1130]

v1.13.0

New Features

• Added SDSS-V file format readers. [#1107]

• Switched from using numpy.correlate to scipy.signal.correlate in template_correlate
  and enabled passing through the method argument. [#1114]

• Added DESI file format readers. [#1116]

• Added truncate option for resampler and template correlation extrapolation treatment. [#1121]

Bug Fixes

• SDSS reader now properly exposes the spPlate_identify and spPlate_loader functions. [#1097]

• Masks now round-trip through tabular-fits reader/write. [#1104]

• template_correlate no longer errors when used on a Spectrum1D that lacks an
  uncertainty array. [#1118]

• with_spectral_unit has been changed to with_spectral_axis_unit and actually works
  now. [#1119]

• Template correlation functions now truncate to overlapping region to avoid NaNs in normalization
  when spectrum and template have non-overlapping regions. [#1121]

• Fixed numpy error when printing a Spectrum1D object. [#1123]

Other Changes and Additions

• Made a couple small updates to developer docs. [#1110, #1112]

• Updated the format of Spectrum1D.__str__ and Spectrum1D.__repr__. [#1123]

v1.12.0

New Features

• Registering a SpectrumList reader for a data loader is now optional. [#1068]

Bug Fixes

• Fixed SDSS-I/II spSpec units. [#1066]

• Addressed compatibility with ASDF 3.0 for JWST data. [#1079]

Other Changes and Additions

• Corrected velocity_convention options in Spectrum1D docstring. [#1088]

v1.11.0

New Features

• wcs1d-fits loader now reads and writes boolean masks. [#1051]

Bug Fixes

• Reimplementation of FluxConservingResampler. It is now faster and yields more accurate results. [#1060]

• Fixed uncertainty calculations in centroid and gaussian width functions, also added an option
  to use an astropy.uncertainty distribution instead of the analytic solution. [#1057]

Other Changes and Additions

• Drastically improved performance of region extraction. [#1048]

• When creating a Spectrum1D object, it is enforced that the spectral axis is sorted and either
  strictly increasing or decreasing. [#1061]

v1.10.0

New Features

• wcs1d-fits loader now reads and writes celestial components of
  of multi-dimensional WCS, and handles mask and uncertainty
  attributes. [#1009]

• Added support for reading from files with flux in counts. [#1018]

Bug Fixes

• Fixed SpectralAxis.with_observer_stationary_relative_to to actually
  return the updated spectral axis. [#992]

• Fixed region extraction for axes/regions in units of u.pix. [#1001]

• tabular-fits writer now properly converts uncertainties to StdDevUncertainty
  if needed. [#1027]

• Fix bug in fit_lines which gave unexpected outputs from the get_fit_info
  and ignore_units keyword arguments. [#1030]

• Fix SNR calculations with both masks and regions. [#1044]

Other Changes and Additions

• Added some basic documentation for Spectrum1D.write. [#1017]

• JWST s2d and s3d readers now requires the optional dependency, stdatamodels,
  which user has to install separately. [#1038]

• ASDF tag for Spectrum1D is now compatible with ASDF v3.
  As a result, minversion of asdf has been bumped to 2.14.
  Redundant ASDF schema for SpectralCoord is removed.
  It also now supports mask serialization. [#1042, #1053]

• JWST X1D reader will no longer raise a UnitWarning for surface brightness
  error. [#1050]

v1.9.1

Bug Fixes

• Add and subtract operations on Spectrum1D now allow for other operand's class
  to handle the arithmetic if that class has special handling. [#988]

v1.9.0

Bug Fixes

• Fix bug in fitting with weights if weights argument is set to 'unc'. [#979]
• Fix bug in JWST reader which caused multi-extension files to load only the
  primary HDU [#982]
• Implemented conversion to expected uncertainty type in a few functions that
  were still just assuming the uncertainty was the correct type. [#984]

Other Changes and Additions

• Bumped astropy minimum version to 5.1. [#984]

V1.8.1

Bug Fixes

• Arithmetic with constants and Spectrum1D now works in either order. [#964]

• Fixed uncertainty propagation in FluxConservingResampler. [#976]

V1.8.0

New Features

• Implemented uncertainty propagation for analysis functions. [#938, #939, #961, #968]

• Model fitting with fit_lines now returns uncertainties from the underlying scipy
  fitter by default. [#962]

Bug Fixes

• Fixed a bug with moment map orders greater than 1 not being able to handle
  cubes with non-square spatial dimensions. [#970]

• Added a workaround for reading JWST IFUs with incorrect GWCS. [#973]

Other Changes and Additions

• The Spectrum1D redshift and radial_velocity attribute setters were deprecated
  in favor of the more explicit set_redshift_to, shift_spectrum_to, and
  set_radial_velocity_to methods. [#946, #943]

• estimate_line_parameters now calculates estimates based on the selected
  region, rather than the entire spectrum. [#962]