1.2 (February 29th 2024)#

  • Released February 29, 2024

  • 25 contributors

  • 215 pull requests since v1.1 (not all listed below)

  • 69 closed issues

Summary#

New features#

  • Metadata containers have been introduced following PIG 25. Preliminary versions have been designed for most data products from DL3 to DL5. They will progressively be accessible on their .meta attributes.

  • Parameter prior support has been introduced following PIG 26. A few Prior classes can be defined on Parameter.prior and the associated log-prior is added to the total statistics during fitting.

  • Helper functions have been added to perform computation of lifetime and total observation time maps.

  • A preliminary support for asymmetric IRFs has been introduced. A tutorial shows how to implement new IRF classes to support non-axisymmetric IRFs.

  • Improved support for temporal analysis with the addition of helper functions to quantify lightcurve variability.

  • New helper classes have been added to perform event sampling for a single or a set of observations: gammapy.datasets.ObservationEventSampler and gammapy.data.ObservationsEventSampler.

  • A checksum option has been added on read and write methods in Gammapy. It follows the FITS standard and reuses the astropy methods and behaviour. A checksum for yaml file has been introduced as well.

  • Improved support for parallel processing

gammapy.catalogs

  • Update the 4FGL catalog to include DR4.

  • Added 1LHAASO catalog.

gammapy.data

  • A general scheme for metadata support has been introduced. The Metadata base class has been designed according to PIG 25.

  • Added a function to remove a time interval from a GTI.

  • Added function to export part of a DataStore to an IVOA compliant ObsCore table.

gammapy.makers

  • Prototype support for asymmetric IRF in Gammapy’s Maker classes. A tutorial exposing how to create such IRFs has been added.

gammapy.maps

  • Implement TimeMapAxis.pix_to_coord()

  • Implement TimeMapAxis.to_gti()

gammapy.modeling

  • Added a function to determine a pivot energy for all spectral models.

  • Added position as a parameter for the TemplateSpatialModel. CAVEAT: results are correct only when the fitted position is close to the map center.

  • Added Spatial parameters in FoVBackgroundModels

  • SkyModel evaluation now supports a TimeMapAxis

  • Adapt FluxPointsDataset to directly fit lightcurves

gammapy.estimators

  • Add a slice_by_coord() function on FluxMaps.

  • Introduce timing utility functions: point to point flux variance, fractional excess variance, doubling/halving times for light curves

  • Add optional sensitivity estimation in ExcessMapEstimator.

  • Added support for NormSpectralModels in FluxPointsDataset / FluxPoints computations

  • Fit status and degrees of freedom have been added to FluxMaps.

  • Add a dedicated EnergyDependentMorphologyEstimator as well as a tutorial demonstrating its usage.

  • Add functionality to rebin flux points using the likelihood profiles.

  • GTI tables are now serialised on FluxPoints objects.

gammapy.visualization

  • Add a plot function for the distribution of Map data.

API changes#

  • Source parameters are now frozen on init in FluxEstimator classes.

  • The norm parameter is now passed as an argument to the various flux estimators. Parameter.is_norm is now deprecated.

  • The default index of ExpCutoffPowerlawNormSpectralModel has been changed to 0 for consistency with the PowerlawNormSpectralModel.

Bug fixes and improvements#

  • Correct MapDataset.info_dict() to use background model rather than IRF background when giving excess counts and significance.

  • Import ray only when needed.

  • Added information on number of degrees of freedom on FluxMaps and FluxPoints objects.

  • Reduced memory usage of MapEvaluator and PSFMap.get_psf_kernel().

  • Added support for multiprocessing in FluxProfileEstimator.

  • Added multiprocessing for WcsNDMap convolution.

  • Add a context manager for multiprocessing.

  • Add a faster reprojection method : reproject_by_image.

  • Use interpolation for dark matter mass. Add Zhao profile and DarkMatterDecaySpectralModel.

  • The asymmetric errors and upper limit calculations in CashCountsStatistic have been replaced by an equivalent analytical expression.

Documentation#

Contributors#

  • Fabio Acero

  • Juan Bernete

  • Noah Biederbeck

  • Julia Djuvsland

  • Axel Donath

  • Kirsty Feijen

  • Stefan Fröse

  • Claudio Galelli

  • Bruno Khélifi

  • Jana Konrad

  • Paula Kornecki

  • Maximilian Linhoff

  • Kurt McKee

  • Simone Mender

  • Daniel Morcuende

  • Laura Olivera-Nieto

  • Fabio Pintore

  • Michael Punch

  • Maxime Regeard

  • Quentin Remy

  • Atreyee Sinha

  • Hanna Stapel

  • Katrin Streil

  • Régis Terrier

  • Tim Unbehaun

Pull Requests#

This list is incomplete. Small improvements and bug fixes are not listed here.

  • [#5044] Add stat_null computation on ParameterEstimator (Atreyee Sinha)

  • [#5040] Add degrees of freedom on FluxMaps (Atreyee Sinha)

  • [#5015] Examples of radially asymmetric IRFs (Atreyee Sinha)

  • [#4994] Spatial parameters in FovBackgroundModel (Katrin Streil)

  • [#4992] Adding a function to guess the format of a FluxPoints object for serialization (Claudio Galelli)

  • [#4989] Reduce memory usage of MapEvaluator (Quentin Remy)

  • [#4978] Support negative offset for Background2d.to_3d (Atreyee Sinha)

  • [#4975] Reduce memory usage of get_psf_kernel (Quentin Remy)

  • [#4973] Add position as a parameter for TemplateSpatialModel (Atreyee Sinha)

  • [#4971] Use FixedPointingInfo in notebook (Atreyee Sinha)

  • [#4970] Adapt FluxPointsDataset to fit light curves (Atreyee Sinha)

  • [#4942] Parallel support for FluxProfileEstimation (Quentin Remy)

  • [#4940] Fix MapEvaluator for the apply_edisp=False case (Quentin Remy)

  • [#4937] Fix import of angular_separation for astropy 6 (Maximilian Linhoff)

  • [#4936] PiecewiseNormSpectralModel serialising interp (Katrin Streil)

  • [#4917] Add new class to directly simulate observations (Maximilian Linhoff)

  • [#4904] Deprecate is_norm on parameter (Quentin Remy)

  • [#4902] Add norm attribute to estimators and deprecate previous norm related attributes (Quentin Remy)

  • [#4886] Introduce hierarchical metadata structures (Régis Terrier)

  • [#4879] Fix energy dependent temporal model simulation (Quentin Remy)

  • [#4854] Notebook to sphinx-gallery script (REGEARD Maxime)

  • [#4851] Parallel support for WcsNDMap map convolution (Quentin Remy)

  • [#4850] Add utility function to split dataset into multiple datasets (Quentin Remy)

  • [#4849] Add TimeMapAxis.to_gti() (Atreyee Sinha)

  • [#4847] Variability tutorial (Claudio Galelli)

  • [#4845] Add context manager for multiprocessing configuration (Quentin Remy)

  • [#4837] Add checksum argument to gammapy products write functions (Régis Terrier)

  • [#4835] Management of metadata for Models (Bruno Khélifi)

  • [#4834] Adding prior stat sum to datasets (Katrin Streil)

  • [#4829] Caching gti and radmax (REGEARD Maxime)

  • [#4828] Adapt SkyModel to evaluate on TimeMapAxis (Atreyee Sinha)

  • [#4822] Add a function to delete a time interval from GTI (Claudio Galelli)

  • [#4817] Computation of total observation time map (Atreyee Sinha)

  • [#4814] Introduce a function to compute the doubling/halving time for a lightcurve (Claudio Galelli)

  • [#4810] Adding a tutorial for observational clustering (Astro-Kirsty)

  • [#4808] adding Observations in memory generator (REGEARD Maxime)

  • [#4805] Description of the arguments of the class Observation (Bruno Khélifi)

  • [#4802] Adapt detect tutorial to include flux parameters in find peaks (Astro-Kirsty)

  • [#4785] Use interpolation for dark matter mass (Stefan Fröse)

  • [#4783] Add EnergyDependentMorphologyEstimator (Astro-Kirsty)

  • [#4770] Raise error if the predicted event number is too large in event sampling (Fabio PINTORE)

  • [#4759] Display the default model parameters in docstrings (Astro-Kirsty)

  • [#4753] Removes size 1 array to scalar conversion deprecation warnings from numpy (Régis Terrier)

  • [#4750] Support pydantic v2.0 (Axel Donath)

  • [#4741] Add Zhao profile (Stefan Fröse)

  • [#4740] Add DarkMatterDecaySpectralModel (Stefan Fröse)

  • [#4738] Introduce Observation metadata container (Régis Terrier)

  • [#4729] Change default index for NormSpectralModel (Quentin Remy)

  • [#4726] Introduce a function to compute the point-to-point fractional variance (Claudio Galelli)

  • [#4714] Replace CashCountsStatistic error calculation by analytical expression (Régis Terrier)

  • [#4703] Update 4FGL catalog default to DR4 (Quentin Remy)

  • [#4697] Deduce pointing mode from arguments in FixedPointingInfo (Maximilian Linhoff)

  • [#4677] Fix wcs.array_shape definition in WcsGeom.create (Quentin Remy)

  • [#4671] Introduce metadata base class (Régis Terrier)

  • [#4669] Add the progress bar for the DataStore (Bruno Khélifi)

  • [#4668] Multidimensional geom support in SkyModel.integrate_geom and evaluate_geom (Régis Terrier)

  • [#4664] Add a faster reprojection method : reproject_by_image (Quentin Remy)

  • [#4660] Add function to convert hermes maps to gammapy compatible format (Quentin Remy)

  • [#4657] Fix the FluxProfileEstimator to take into account models (Quentin Remy)

  • [#4638] Add a from_stack method on Observations (REGEARD Maxime)

  • [#4635] Add function to determine pivot energy for any spectral model (Astro-Kirsty)

  • [#4628] Match energy binning per decade to pyirf’s (JBernete)

  • [#4620] Adding prior class (Katrin Streil)

  • [#4615] Improve sensitivity example (Maximilian Linhoff)

  • [#4608] Add a slice_by_coord function for FluxMaps (Claudio Galelli)

  • [#4599] Add a SafeMaskMaker at DL3 level (Atreyee Sinha)

  • [#4595] Add 1LHAASO to gammapy.catalog (Quentin Remy)

  • [#4584] Add optional sensitivity computation in ExcessMapEstimator (Quentin Remy)

  • [#4574] Fixing if statements in OGIPDatasetWriter (REGEARD Maxime)

  • [#4567] Freeze source parameters in FluxEstimator (Régis Terrier)

  • [#4561] Export Datastore to Obscore table (PaulaKx)

  • [#4546] Remove is_ul column in FluxPointsEstimator if no upper limit is defined (Astro-Kirsty)

  • [#4540] Add function to extract values from FluxMaps (Astro-Kirsty)

  • [#4501] Exposing computation of the fractional excess variance (Claudio Galelli)

  • [#4491] PIG 27 - Metadata structure (Régis Terrier)

  • [#4485] Implement TimeMapAxis.pix_to_coord (Atreyee Sinha)

  • [#4432] Serialise gti table to flux points object (Atreyee Sinha)

  • [#4408] Add plot function for 1D distribution of map data (REGEARD Maxime)

  • [#4381] PIG 16 - Model Priors API (Noah Biederbeck)

  • [#4217] FluxPointsDataset support model with spatial template and NormSpectralModel (Quentin Remy)