The LAXPC (LArge X-ray Proportional Counter) software is a collection of tools developed for analyzing data from the LAXPC instrument on board the AstroSat satellite. The software allows you to create level2events file and generate good time intervals (GTI) from the LAXPC data.
This tutorial will walk you through the steps of creating level2events file and GTI using LAXPC software in the `Analysis’ directory.
$ laxpc_make_filelist
The above command use to generate output as 3 text files : eventfiles, filterfiles, and orb_filelist.
$ laxpc_make_event eventfiles
File containing names of level 1 files: eventfiles
Output Event file name: level2.event.fits
No of file for laxpc 10,20,30 : 1 1 1
Using level 1 event file:
/data2/divyar/assc_tutorails/20170328_G06_033T01_9000001116_level1/laxpc//08120/lxp1/modeEA/AS1G06_033T01_9000001116lxp1EA_level1.fits
No of events read = 1666565
Using level 1 event file:
/data2/divyar/assc_tutorails/20170328_G06_033T01_9000001116_level1/laxpc//08120/lxp2/modeEA/AS1G06_033T01_9000001116lxp2EA_level1.fits
No of events read = 3333232
Using level 1 event file:
/data2/divyar/assc_tutorails/20170328_G06_033T01_9000001116_level1/laxpc//08120/lxp3/modeEA/AS1G06_033T01_9000001116lxp3EA_level1.fits
No of events read = 4999899
Obtained energy information for laxpc 10 using /home/xray/software/astrosat/laxpc/LAXPCsoftware_Aug4/LAXPC_CAL/response/lx10/lx10cshm08v1.0.rmf
Obtained energy information for laxpc 20 using /home/xray/software/astrosat/laxpc/LAXPCsoftware_Aug4/LAXPC_CAL/response/lx20/lx20cshp05v1.0.rmf
Obtained energy information for laxpc 30 using /home/xray/software/astrosat/laxpc/LAXPCsoftware_Aug4/LAXPC_CAL/response/lx30/lx30cshp16rho30v1.0.rmf
writing fits file 4999899
Using level 1 event file:
/data2/divyar/assc_tutorails/20170328_G06_033T01_9000001116_level1/laxpc//08120/lxp1/modeEA/AS1G06_033T01_9000001116lxp1EA_level1.fits
No of events read = 1666565
Using level 1 event file:
/data2/divyar/assc_tutorails/20170328_G06_033T01_9000001116_level1/laxpc//08120/lxp2/modeEA/AS1G06_033T01_9000001116lxp2EA_level1.fits
No of events read = 3333232
Using level 1 event file:
/data2/divyar/assc_tutorails/20170328_G06_033T01_9000001116_level1/laxpc//08120/lxp3/modeEA/AS1G06_033T01_9000001116lxp3EA_level1.fits
No of events read = 4999899
Obtained energy information for laxpc 10 using /home/xray/software/astrosat/laxpc/LAXPCsoftware_Aug4/LAXPC_CAL/response/lx10/lx10cshm08v1.0.rmf
Obtained energy information for laxpc 20 using /home/xray/software/astrosat/laxpc/LAXPCsoftware_Aug4/LAXPC_CAL/response/lx20/lx20cshp05v1.0.rmf
Obtained energy information for laxpc 30 using /home/xray/software/astrosat/laxpc/LAXPCsoftware_Aug4/LAXPC_CAL/response/lx30/lx30cshp16rho30v1.0.rmf
writing fits file 4999899
Using level 1 event file:
/data2/divyar/assc_tutorails/20170328_G06_033T01_9000001116_level1/laxpc//08120/lxp1/modeEA/AS1G06_033T01_9000001116lxp1EA_level1.fits
no of events read = 837282
Using level 1 event file:
/data2/divyar/assc_tutorails/20170328_G06_033T01_9000001116_level1/laxpc//08120/lxp2/modeEA/AS1G06_033T01_9000001116lxp2EA_level1.fits
no of events read = 1551800
Using level 1 event file:
/data2/divyar/assc_tutorails/20170328_G06_033T01_9000001116_level1/laxpc//08120/lxp3/modeEA/AS1G06_033T01_9000001116lxp3EA_level1.fits
no of events read = 2104485
Obtained energy information for laxpc 10 using /home/xray/software/astrosat/laxpc/LAXPCsoftware_Aug4/LAXPC_CAL/response/lx10/lx10cshm08v1.0.rmf
Obtained energy information for laxpc 20 using /home/xray/software/astrosat/laxpc/LAXPCsoftware_Aug4/LAXPC_CAL/response/lx20/lx20cshp05v1.0.rmf
Obtained energy information for laxpc 30 using /home/xray/software/astrosat/laxpc/LAXPCsoftware_Aug4/LAXPC_CAL/response/lx30/lx30cshp16rho30v1.0.rmf
writing fits file 2104485
writing response file names
The above command will generate an output named level2.event.fits from level1 downloaded data.
$ laxpc_make_stdgti filterfiles
Filter file List being used: filterfiles
This command will create a file nameed usergti.fits
A manually created usergti file in the form of txt file provided starting to end time can also be provided to get particular time-span result. This can be either in:
ascii giving start and stop times,
e.g. A file ‘usergti’ containing:
500.3 3000.1
3500.0 4550.34
or
a Fits GTI file with START and STOP columns
$ gedit usergti.txt
In text file, data can be entered such as [START-time STOP-time]
To extract light curves and Power density spectra for any energy range, please provide the minimum and maximum energy values in the eneinput file such as [3 50].
$ gedit eneinput
The default energy range is 3-80 keV if the file does not exist.