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Project Description
Fermi LAT Multi-Processor Scripts (version 1.4)

The Fermi Science Tools (http://fermi.gsfc.nasa.gov/ssc) are a suite
of tools developed for the analysis of both Fermi LAT and GBM
data. This suite was developed by the FSSC and the instrument teams,
and was reviewed by the Fermi Users' Group. The LAT Multi-Processor
Scripts are a set of python scripts to facilitate the analysis of LAT
data. This package depends on the Fermi Science Tools.

The current tools available are

* gtdiffrsp_mp.py
* gtexpmap_mp.py
* gtltcube_mp.py
* gttsmap_mp.py (Unbinned Only)

Installation: navigate to the gtapps_mp directory and execute

> python setup.py install

To receive information on program execution for a specific script execute:

> python <gtapp>_mp.py -h

See below for details on each tool.

* gtdiffrsp_mp.py *

Submits the gtdiffrsp program as separate threads via python and
joins up the resulting temporary files at the end resulting in a
single file. This greatly reduces the running time. For more details
on gtdiffrsp see the gtdiffrsp help file.

usage: gtdiffrsp_mp.py [-h] [--savetmp SAVETMP]
jobs evfile scfile srcmdl irf outfile

positional arguments:
jobs The number of jobs you wish to spawn (usually the number
of cores on your machine).
evfile Input event file. See gtdiffrsp help for more
information.
scfile Spacecraft file. See gtdiffrsp help for more information.
srcmdl The source model file to use. See gtdiffrsp help for more
information.
irf The IRFs to use. See gtdiffrsp help for more information.
outfile Output file name.

optional arguments:
-h, --help show this help message and exit
--savetmp SAVETMP Save the temporary files (default is False).

example:
This computes the diffuse response for the data in the file
'3C279_events.fits' using 4 separate threads using the spacecraft
file 'SC.fits', the model file '3C279_model.xml' and the P7SOURCE_V6
instrument response functions. It saves the output in
'3C279_events_diffrsp.fits'

> python gtdiffrsp_mp.py 4 3C279_events.fits SC.fits 3C279_model.xml
P7SOURCE_V6 3C279_events_diffrsp.fits

* gtexpmap_mp.py *

Submits the gtexpmap program as operate threads via python and joins
up the resulting temporary exposure maps at the end resulting in a
single exposure map for the input event file. This greatly reduces the
running time. For more details on gtexpmap see the gtexpmap help
file. Note that the checksum and datasum are incorrect for the final
file. The number of spawned jobs is equal to xbins x ybins.

usage: gtexpmap_mp.py [-h] [--savetmp SAVETMP]
nlong nlat xbins ybins sfile evfile expcube IRFS srcrad
nenergies outfile

positional arguments:
nlong Number of longitude points. See gtexpmap help for more
information.
nlat Number of latitude points. See gtexpmap help for more
information.
xbins The number of bins along the x-axis. Must divide evenly
into nlong.
ybins The number of bins along the y-axis. Must divide evenly
into nlat.
sfile The spacecraft data file. See gtexpmap help for more
information.
evfile Input event file. See gtexpmap help for more information.
expcube Input livetime cube. See gtexpmap help for more
information.
IRFS IRFs to use. See gtexpmap help for more information.
srcrad Radius. See gtexpmap help for more information.
nenergies Number of energy slices. See gtexpmap help for more
information.
outfile Output file name.

optional arguments:
-h, --help show this help message and exit
--savetmp SAVETMP Save the temporary files (default is False).

example:
This computes a 30 degree radius exposure map for a the data in
'3C279_filtered_gti.fits' with 120 by 120 pixels and 20 energy bins
using the spacecraft file 'SC.fits', the exposure cube
'3C279_ltcube.fits' and the P7SOURCE_V6 instrument response files.
It submits 6 jobs by making xbins = 3 and ybins = 2 (3*2 = 6). Both
3 and 2 divide equally into 120. The resulting file is saved as
'3C279_expmap.fits'.

> python gtexpmap_mp.py 120 120 3 2 SC.fits 3C279_filtered_gti.fits
3C279_ltcube.fits P7SOURCE_V6 30 20 3C279_expmap.fits

* gtltcube_mp.py *

Submits the gtltcube program as operate threads via python and joins
up the resulting temporary exposure cubes at the end resulting in a
single exposure cube for the input event file. This greatly reduces
the running time. For more details on gtltcube see the gtltcube help
file.

usage: gtltcube_mp.py [-h] [--savetmp SAVETMP] [--zmax ZMAX]
jobs sfile evfile outfile

positional arguments:
jobs The number of jobs you wish to spawn (usually the number
of cores on your machine).
sfile The spacecraft data file. See gtltcube help for more
information.
evfile Input event file. See gtltcube help for more information.
outfile Output file name.

optional arguments:
-h, --help show this help message and exit
--savetmp SAVETMP Save the temporary files (default is False).
--zmax ZMAX zmax parameter for gtltcube (default is 180)

example:
This example creates a livetime cube for the file
'3C279_filtered_gti.fits' using 8 threads and the 'SC.fits'
spacecraft file. It saves the output to '3C279_ltcube.fits'. It
also sets the zmax value to 100 (the recommended value).

> python gtltcube_mp.py 8 SC.fits 3C279_filtered_gti.fits
3C279_ltcube.fits --zmax 100

* gttsmap_mp.py *

Generates a TS Map by running separate pixels on separate
threads. It creates a template counts map to determine the location
of the pixels and the calculates the TS of a test source at each
pixel on that map. It then merges the results at the end. The map is
divided into separate regions (called 000,001,002...) depending on
the number of jobs the user requests. It creates subdirectories for
each region and operates on them within the subdirectory. For more
details on the parameters see the gttsmap help file. NOTE: ONLY DOES
AN UNBINNED ANALYSIS. NOTE2: Any files referenced in the model XML
file must be referenced by absolute and not relative directories
(ie. not ./ or ../)"

usage: gttsmap_mp.py [-h] [--savetmp SAVETMP]
nxpix nypix jobs evfile scfile expcube srcmdl IRFS
optimizer ftol toltype binsz coordsys xref yref proj
outfile UNBINNED expmap


positional arguments:
nxpix Number of pixels along x-axis. See gttsmap help for more
information.
nypix Number of pixels along y-axis. See gttsmap help for more
information.
jobs The number of concurrent jobs.
evfile Input event file. See gttsmap help for more information.
scfile The spacecraft data file. See gttsmap help for more
information.
expcube Input livetime cube. See gttsmap help for more
information.
srcmdl XML source model definition. See gttsmap help for more
information. Any files in the xml (like the
diffuse models) need to be referenced by absolute
directories.
IRFS IRFs to use. See gttsmap help for more information.
optimizer The optimizer (e.g. NEWMINUIT). See gttsmap help for more
information.
ftol Fit tolerance. See gttsmap help for more information.
toltype Tolerance type (0 for RELATIVE and 1 for ABSOLUTE). See
gttsmap help for more information.
binsz Image scale (deg/pix). See gttsmap help for more
information.
coordsys CEL or GAL. See gttsmap help for more information.
xref x-coord of center (RA or l). See gttsmap help for more
information.
yref y-coord of center (DEC or b). See gttsmap help for more
information.
proj Coordinate projection. See gttsmap help for more
information.
outfile Output file name.
analysis UNBINNED. Only unbinned analysis supported.
expmap Input exposure map. See gttsmap help for more
information.

optional arguments:
-h, --help show this help message and exit
--savetmp SAVETMP Save the temporary files (default is False).

example:
This example creates a TS Map called '3C279_tsmap.fits' with 100
bins and using 6 threads. Each bin is 0.5 degrees square. It uses
the event file '3C279_filtered_gti.fits', the spacecraft file
'SC.fits', the exposure map '3C279_expmap.fits', the livetime cube
'3C279_ltcube.fits', the model file '3C279_model.xml' and the
P7SOURCE_V6. The optimization is done by the MINUIT optimizer at an
absolute tolerance of 1e-5. The map is centered on 193.98,-5.82 and
is created using the STG celestial coordinate system.

> python gttsmap_mp.py 10 10 6 3C279_filtered_gti.fits SC.fits
3C279_ltcube.fits 3C279_model.xml P7SOURCE_V6
MINUIT 1e-05 1 0.5 CEL 193.98 -5.82 STG 3C279_tsmap.fits UNBINNED
3C279_expmap.fits
Release History

Release History

1.5

This version

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1.4

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Download Files

Download Files

TODO: Brief introduction on what you do with files - including link to relevant help section.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
gtapps_mp-1.5b.tar.gz (13.6 kB) Copy SHA256 Checksum SHA256 Source Jun 16, 2016

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