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New Features and Important Changes in ctools 1.3.0.dev1
7 June 2017
Introduction
------------
This document briefly summarizes the changes that have been made in this
ctools release with respect to the precedent release.
Configuration
-------------
The Python unit tests now raise exceptions instead of exiting with a non-
zero return code so that the user is not thrown out of Python after calling
ctools.test() and cscripts.test() (#1983).
If the code originates from the Git repository the configuration now switches
to developer mode which implies that the Python bindings are always built.
This solves the problem that occured for developers that could not get rid
of existing Python wrappers, even if they modified the Python interface
(#1985).
The cscripts are now copied into the bin directory upon installation instead
of creating symbolic links. This avoids problems on some VM file systems on
which creation of symbolic links does not work (#1987).
The missing *.i SWIG Python interface definition files were added to
the release tarball (#2114).
Python interface
----------------
None
Support model
-------------
The ctool::init_members() method now sets the local language to English
so that writing commas instead of dots is avoided (#1370).
ctobssim - CTA observation simulation
-------------------------------------
The tool now supports map cubes that are not overlapping with the RoI.
In this case, no spectral nodes exist and before the spectral flux()
method called in ctobssim::get_model_flux() was throwing an exception.
Now, for map cubes outside the RoI the flux is set to zero.
The tool now also added Monte Carlo identifiers to the simulated events
so that each event can be traced back to the model from which it originated
(#1483).
ctselect - CTA event selection
------------------------------
A "phase" parameter has been added to ctselect to allow event selection
according to their phase information. The phase parameter accepts a
string that provides a comma separated list of phase intervals in the
format "0.1:0.4,0.6:0.8". Wrap around is supported (e.g. "0.8:0.1"
selects events with phases in the intervals [0.8,1.0] and [0.0,0.1]
(#1996).
ctbin - CTA event binning
-------------------------
None
ctlike - Maximum likelihood fitting
-----------------------------------
The tool now stores the covariance matrix in either FITS or CSV format,
depending on the file type specified in the file name. For file names
terminating with ".fits" or ".fit" a FITS file will be written, otherwise
a CSV file will be written (#1863).
cttsmap - Generation of Test Statistic map
------------------------------------------
None
ctskymap - CTA sky mapping
--------------------------
Any RoI is now taken into account in ctskymap so that if IRF background
subtraction is requested the counts and background maps are coherent. In
addition, the energy integration over the background template is now done
numerically so that strong variations in the background rate, such as
those occuring close to the threshold, are correctly taken into account
(#1975).
ctmodel - CTA counts cube modelling
-----------------------------------
None
ctexpcube - CTA exposure cube generation
----------------------------------------
None
ctpsfcube - CTA point spread function cube generation
-----------------------------------------------------
None
ctedispcube - CTA energy dispersion cube generation
---------------------------------------------------
None
ctbkgcube - CTA background cube generation
------------------------------------------
The tool now throws an exception if no valid background model was found in
the model container. This prevents from creating an empty background cube
(#1652).
ctmapcube - CTA map cube generation
-----------------------------------
The tool now supports loading the energy binning definition from an energy
boundary FITS file, behaving now similar to the other cube tools (#1978).
ctcubemask - CTA cube filtering
-------------------------------
None
ctbutterfly - Generate butterfly diagrams
-----------------------------------------
The tool now uses Gaussian error propagation as the standard method for the
computation of the butterfly diagram. The envelope method that existed before
is still available for power law spectral models as an option. The "method"
parameter has been added to allow the selection of the computation method
(#1862).
A bug in the covariance matrix has been corrected that probably was introduced
in the implementation of the Gaussian error propagation method (#2121).
ctulimit - Compute upper limit
------------------------------
None
cterror - Likelihood profile error computation
----------------------------------------------
None
ctprob - Event probability computation
--------------------------------------
The ctprob tool has been added that computates for each event the probability
that the event originates from a given model component. The tool takes on input
either an event list or an observation definition XML file. It appends to each
event list a column for each model component that will contain the probability
that the event originates from that component (#1991).
ctphase - Event phase computation
---------------------------------
The ctphase tool has been added that compute the phase for each event based on
a temporal phase curve model. This allows for example to perform a pulsar or
binary analysis (#1982).
cscripts
--------
The csebins script has been added that generates an energy boundaries
extension that can be used for a stacked analysis. The energy boundaries
are set as function of the variation in the effective area and background
rates of the Instrument Response Function (#1976).
A regression scheme now replaces the averaging scheme in cssens as this
allows more accurately the prediction of the flux value at the threshold
Test Statistic. The num_avg parameter has been removed (#1989).
The names of some ROOT histograms has been changed in the Monte Carlo data
and the "EffectiveAreaEtrue_offaxis" needed to be changed to
"EffectiveAreaEtrueNoTheta2cut_offaxis" and "EffectiveAreaEtrue" to
"EffectiveAreaEtrueNoTheta2cut" in csroot2caldb.
Examples
--------
None
caldb
-----
None
models
------
None