November 23, 2021 Software Open Access

Karl Kosack; Jason Watson; Maximilian Nöthe; Jean Jacquemier; Alison Mitchell; Dominik Neise; Christoph Deil; Michele Peresano; Samuel Timothy Spencer; Lukas Nickel; Raquel de los Reyes; Franca Cassol; Noah Biederbeck; Kai Brügge; Thomas Vuillaume; Michele Mastropietro; Jérémie Decock; Abelardo Moralejo; Wrijupan Bhattacharyya; francesco visconti; Jose Enrique Ruiz; mgaug; Ruben Lopez-Coto; orelgueta; Cyril Alispach; Julien Lefaucheur; Konstantin Pfrang; Moritz Hütten; thomasarmstrong; Alice Donini

Dublin Core Export

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Karl Kosack</dc:creator>
  <dc:creator>Jason Watson</dc:creator>
  <dc:creator>Maximilian Nöthe</dc:creator>
  <dc:creator>Jean Jacquemier</dc:creator>
  <dc:creator>Alison Mitchell</dc:creator>
  <dc:creator>Dominik Neise</dc:creator>
  <dc:creator>Christoph Deil</dc:creator>
  <dc:creator>Michele Peresano</dc:creator>
  <dc:creator>Samuel Timothy Spencer</dc:creator>
  <dc:creator>Lukas Nickel</dc:creator>
  <dc:creator>Raquel de los Reyes</dc:creator>
  <dc:creator>Franca Cassol</dc:creator>
  <dc:creator>Noah Biederbeck</dc:creator>
  <dc:creator>Kai Brügge</dc:creator>
  <dc:creator>Thomas Vuillaume</dc:creator>
  <dc:creator>Michele Mastropietro</dc:creator>
  <dc:creator>Jérémie Decock</dc:creator>
  <dc:creator>Abelardo Moralejo</dc:creator>
  <dc:creator>Wrijupan Bhattacharyya</dc:creator>
  <dc:creator>francesco visconti</dc:creator>
  <dc:creator>Jose Enrique Ruiz</dc:creator>
  <dc:creator>mgaug</dc:creator>
  <dc:creator>Ruben Lopez-Coto</dc:creator>
  <dc:creator>orelgueta</dc:creator>
  <dc:creator>Cyril Alispach</dc:creator>
  <dc:creator>Julien Lefaucheur</dc:creator>
  <dc:creator>Konstantin Pfrang</dc:creator>
  <dc:creator>Moritz Hütten</dc:creator>
  <dc:creator>thomasarmstrong</dc:creator>
  <dc:creator>Alice Donini</dc:creator>
  <dc:date>2021-11-23</dc:date>
  <dc:description>What's Changed since v0.11.0
The main changes in this release are related to expanding the data model to include DL2 and the computation of DL2 parameters.   This also required changing the units of some DL1 parameters from the CameraFrame to the TelescopeFrame to make them easier to compare between telescopes, which  includes an overhaul of how the HillasReconstructor works (supporting both frames as input), and adds  include a new Component ShowerProcessor that generates DL2(a) information.  The data model was expanded to include DL2 and to support a more general InstrumentDescription serialization.  DL1Writer was refactored into a general DataWriter that  writes the full data model. TableLoader provides a user interface to load all events at once from ctapipe output files, joining them as needed, which is useful for benchmarking.
The ctapipe-stage1 tool was removed and replaced with  the more general ctapipe-process, which can now handle any transformation from R0 to DL2a, depending on what configuration file it is given.  A ctapipe-quickstarttool was added to generate some starting config files, and a ctapipe-fileinfo tool to show file header information for any files written by ctapipe.
New Features

Add flag to use camera frame for ctapipe-process (#1790) @maxnoe
TableLoader (#1771) @maxnoe
Add flags to enforce recomputation of dl1/dl2 (#1776) @LukasNickel
ctapipe-quickstart tool (#1774) @kosack
Add condition option to read_table (#1769) @maxnoe
Implement allow_none=False for Path trait, fixes #1759 (#1760) @maxnoe
ctapipe-fileinfo (#1756) @kosack
Configurable contact information for DataWriter (#1757) @maxnoe
Generalize image converter for square pixels (#1728) @LukasNickel
Implement ctapipe-process (#1726) @kosack
Add support for calibration scale and shift in R1 (#1749) @HealthyPear
Direction reconstruction (also) from Telescope Frame (#1408) @HealthyPear
Add no-flags, add short aliases, make aliases more consistent (#1748) @nbiederbeck
Adapt subarray for 'allowed_tels' option in merger_tool (#1736) @Hckjs
Implement a shower processor (#1675) @HealthyPear
DL2 data model and output (#1673) @kosack
Allow regexp in table name for  TableWriter.exclude() (#1717) @kosack
Shortform aliases (#1713) @maxnoe
implements add_column_transform_regexp feature (#1690) @kosack
Use iminuit&gt;=2 (#1714) @nbiederbeck

Breaking Changes
Both of these change the data model, but the code remains backward-compatible.

Use indices for camera / optics lookup in from_hdf / to_hdf (#1426) @maxnoe
Hillas parameters in telescope frame (optionally) (#1591) @LukasNickel
ctapipe-stage1 refactored into ctapipe-process (#1726) 

Performance Improvements

Do not guess pixel area when transforming (#1794) @maxnoe
Improve performance of calc_pixel_neighbors, fixes #1791 (#1792) @maxnoe
Precompile table regex for column exclusion, fixes #1719 (#1720) @maxnoe

Bug Fixes and Refactoring

Compare to numpy integer (#1801) @LukasNickel
Fix negative vmin/vmax raising error with mpl3.5, fixes #1805  (#1807) @maxnoe
Fix display dl1 (#1795) @maxnoe
Fix writing FITS in fileinfo for unicode (#1789) @maxnoe
Fix TelescopeParameter for traitlets 5.1 (#1784) @maxnoe
Remove unnecessary is_simulation for ImageProcessor (#1773) @maxnoe
Remove debug prints, fixes #1764 (#1765) @maxnoe
Remove redundant test code in simtel event source test code (#1747) @maxnoe
Change REF_WIDTH to REFWIDTH to fit into 8 characters for FITS, fixes #1452 (#1753) @maxnoe
Rename function. Fix #1733. (#1734) @nbiederbeck
Fix ctapipe-merge with --allowed-tels (#1712) @nbiederbeck
Set errordef for taubin fit (#1716) @maxnoe

Documentation, Testing, and Build updates
a big change is that tests are now parallelizable, leading to faster results from the CI system.

Removing unwanted quotes for code block in readme (#1808) @vuillaut
Add note about PYTHONNOUSERSITE to README (#1806) @maxnoe
Fix deprecated keys in setup.cfg (#1804) @maxnoe
Fix several warnings during tests (#1787) @maxnoe
Unit tests: fix mutated camera geometry fixtures (#1793) @maxnoe
Build docs using two cores, fix name of step (#1781) @maxnoe
Do not use sphinx action for building docs (#1780) @maxnoe
include stage1_config.json in package (#1752) @nbiederbeck
Switch on doctests in the CI (#1731) @maxnoe
Add tests for download functions (#1763) @maxnoe
Fix docs for Path (#1758) @maxnoe
Use pypa/build for packaging (#1725) @maxnoe
Cache the test data (#1746) @maxnoe
Improve dl1 fixtures and fix test concurrency issues (#1741) @maxnoe
Parallel tests (#1740) @maxnoe
Pyflakes in CI (#1735) @maxnoe
Add citing information for version 0.11 (#1710) @LukasNickel

Contributors
@Hckjs, @HealthyPear, @LukasNickel, @kosack, @maxnoe, @nbiederbeck and @vuillaut</dc:description>
  <dc:identifier>https://zenodo.org/record/5720333</dc:identifier>
  <dc:identifier>10.5281/zenodo.5720333</dc:identifier>
  <dc:identifier>oai:zenodo.org:5720333</dc:identifier>
  <dc:relation>url:https://github.com/cta-observatory/ctapipe/tree/v0.12.0</dc:relation>
  <dc:relation>doi:10.5281/zenodo.3372210</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:title>cta-observatory/ctapipe: v0.12.0</dc:title>
  <dc:type>info:eu-repo/semantics/other</dc:type>
  <dc:type>software</dc:type>
</oai_dc:dc>