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###########################################################
## HOWTO
## Analyze Chandra ACIS data
##
## Weitian LI <liweitianux@gmail.com>
## Updated: 2017-02-06
###########################################################
### Settings: {{{
## directory:
# chandra scripts:
CHANDRA_SCRIPT_DIR="${HOME}/bin/chandra/scripts"
# mass program dir:
MASS_PROFILE_DIR="${HOME}/bin/chandra/mass_profile"
## aliases:
alias fitmass="${MASS_PROFILE_DIR}/fit_mass.sh"
alias fitnfw="${MASS_PROFILE_DIR}/fit_nfw_mass mass_int.dat"
alias fitsbp="${MASS_PROFILE_DIR}/fit_sbp.sh"
alias fitwang="${MASS_PROFILE_DIR}/fit_wang2012_model tcl_temp_profile.txt"
alias calclxfx="${MASS_PROFILE_DIR}/calc_lxfx_simple.sh"
alias getlxfx="${MASS_PROFILE_DIR}/get_lxfx_data.sh"
### Settings: }}}
### Websites: {{{
NED: http://ned.ipac.caltech.edu/forms/byname.html
Chandra Chaser: http://cda.harvard.edu/chaser/dispatchOcat.do
SIMBAD: http://simbad.u-strasbg.fr/simbad/
nH tool: https://heasarc.gsfc.nasa.gov/cgi-bin/Tools/w3nh/w3nh.pl
### }}}
### Step-by-step guide to analyze ACIS data: {{{
(1) $ chandra_repro indir=. outdir=repro verbose=2
(2) $ cd repro; mkdir -p evt bkg img spc/profile mass;
(3) $ cd evt; ln -s ../acis*evt2.fits .;
(4) $ ciao_procevt.sh
(5) $ cd ../bkg; ln -s ../evt/evt2*_clean.fits .;
(6) $ ciao_blanksky.sh
(7) ds9 open 'evt2*_clean.fits'; select edge region as the
*local background*, save as 'lbkg.reg';
and estimate the phonton counts:
(8) $ dmlist "evt2*_clean.fits[sky=region(lbkg.reg)][energy=400:8000]" blocks
(9) $ ciao_bkg_spectra.sh reg="lbkg.reg" basedir=.. nh=<nh> z=<z>
(10) $ xspec
(11) xspec> @xspec_lbkg_model.xcm
xspec> fit
xspec> cpd /xs
xspec> pl l del
xspec> @<path>/xspec_bkgcorr.tcl
(12) $ cd ../img
$ ln -s ../evt/evt2*_clean.fits .
$ ln -s ../bkg/bkgcorr_blanksky_lbkg.pi . # maybe 'lbkg.pi'
$ ln -s ../pcadf*_asol1.fits .
(13) ds9 open 'evt2*_clean.fits', select the center of cluster,
save the region as 'center.reg'
(14) $ ciao_genregs.sh reg_in=center.reg bkgd=<bkgd>
(15) $ cd ../spc/profile
$ ln -s ../../evt/evt2*_clean.fits .
$ ln -s ../../bkg/bkgcorr_blanksky_lbkg.pi . # maybe 'lbkg.pi'
$ ln -s ../../img/rspec.reg img_rspec.reg
(16) ds9 open 'evt2*_clean.fits' with regs 'img_rspec.reg';
adjust the regions and save as 'rspec.reg'
(17) create conf file '<NAME>_spec.conf' like:
basedir ../..
reg rspec.reg
bkgd bkgcorr_blanksky_lbkg.pi | lbkg.pi
nh <nh>
z <redshift>
(18) $ ciao_deproj_spectra.sh reg="rspec.reg" bkgd=<bkgd> basedir="../.." nh=<nh> z=<z>
(19) Fit the radial spectra to derive the radial temperature profile:
$ xspec
xspec> @xspec_deproj.xcm
xspec> fit
(more tweaks when necessary)
xspec> @<path>/xspec_tprofile.tcl
(input 1)
xspec> exit
(20) fix 'NULL' values in 'tcl_temp_profile.qdp' & 'tcl_temp_profile.txt'
(21) Determine the average temperature and abundance:
$ xspec
xspec> newpar <..>=<..> (bind all kT's and Abundanc's)
xspec> fit
(get average temperature and abundance)
xspec> exit
(22) $ cd ../../img;
create '<NAME>_expcorr.conf' with contents:
basedir ..
reg sbprofile.reg
nh <nh>
z <redshift>
temp <avg_temp>
abund <avg_abund>
(23) $ ciao_expcorr_sbp.sh basedir=.. nh=<nh> z=<redshift> temp=<avg_temp> abund=<avg_abund>
## --------------------------------------------------------
(24) $ cd ../mass; clean_massdir.sh;
(25) check needed linked files:
sbprofile.txt, flux_sbp.txt, radius_sbp.txt, tcl_temp_profile.txt
(26) check needed config files:
wang2012_param.txt,
fitting_mass.conf, fitting_sbp.conf,
fitting_dbeta_mass.conf, fitting_dbeta_sbp.conf,
global.cfg
(27) $ fitwang wang2012_param.txt
(28) $ qdp fit_result.qdp # check fitted temperature profile
(29) $ fitsbp fitting_mass.conf # single-beta sbp
$ fitsbp fitting_dbeta_mass.conf # double-beta sbp
(30) $ qdp sbp_fit.qdp # check fitted sbp
(31) $ ln -s fitting_mass.conf global.cfg # use single-beta
$ ln -s fitting_dbeta_mass.conf global.cfg # use double-beta
(32) $ fitnfw <z> [rmin_kpc]
(33) $ qdp nfw_fit_result.qdp # check fitted nfw profile, and ajust 'rmin_kpc'
(34) add 'nfw_rmin_kpc' to 'global.cfg'
(35) $ fitmass global.cfg c # calculate the center values
(36) $ fitmass global.cfg 2>&1 | tee global_<date>.log # calculate mass data
(37) $ collect_infodata.sh
(38) $ cd ../img;
$ chandra_update_xcentroid.sh
(39) $ cd ../spc/profile;
(40) $ chr500 inner=0.1 outer=0.5 # check 0.5R500 range
$ chr500 inner=0.2 outer=0.5
(41) $ xspec
xspec> @xspec_r500avgt_0.1-0.5.xcm
xspec> fit; fit;
xspec> cpd /xs; pl l del;
xspec> error 1. 2 3 # calc errors (68%) of kT and Abundanc
(42) update the data of 'T(0.1-0.5 R500)', 'Z(0.1-0.5 R500)' ...
## --------------------------------------------------------
(43) $ cd ../..; # in 'repro' dir
$ cp -a mass lxfx; cd lxfx;
(44) $ calclxfx global.cfg c 500 200 # 'c' for center values
$ calclxfx global.cfg 500 200 # calc 'errors'
(45) $ getlxfx . c 500 200 # for center results
$ getlxfx . 500 200 # for all results (with errors)
## --------------------------------------------------------
(46) $ cd ..; cd spc/profile;
calculate cooling time and Csb value:
$ ciao_calc_ct_csb.sh
check the region whether exceeds ccd edge, and answer y/n
check results in file 'ct_csb_results.txt'
---
Alternatively:
$ ciao_calc_ct.sh
$ ciao_calc_csb.sh
check the region whether exceeds ccd edge, and answer y/n
check results in file 'cooling_results.txt' and 'csb_results.txt'
---
### process }}}
# vim: set ts=8 sw=4 tw=0 fenc=utf-8 ft=txt: #
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