XWSM or “X-ray Wavelet Spectral Mapping” is a program written primarily to analyze x-ray data of XMM-Newton x-ray telescope. But it seems to be working fine also for Chandra data. Till now only very faint mode data taken by ACIS-I camera of Chandra can be analyzed using XWSM.
The software is written by Herve Bourdin, a post-doc at the University of Rome Tor Vergata. Bourdin works at the cosmology group of Rome Tor Vergata. From Herve Bourdin’s tutorial:
“The X-Ray Wavelet Spectral Mapping (XWSM) package is a set of tools dedicated to the mapping of spectroscopic observables associated with the X-ray emission of the Inter- Galactic Medium (IGM), within clusters and groups of galaxies. Spectroscopic observables like the IGM brightness, temperature and metallicity can be estimated within specific re- gions of the field of view, or mapped by means of wavelet algorithms. These tools have been developped by Herv ́e Bourdin1, in collaboration with Albert Bijaoui2, Eric Slezak2 and Jean-Luc Sauvageot3. The present version of XWSM is specific to XMM-Newton data. Please notice that while the bulk of this work has been developped as a free software, some proprietary softwares, namely the Numerical Recipes and IDL have been used, so that the relative licenses are required. Moreover, some HEASARC softwares (FTOOLS) may be useful for further applications.”
Basic commands of XWSM are as follows:
xwsm_start, ‘ms1455_zoom’, acis_aoff_file=aoff, acis_evt_files=evt2, badpix_files=bpx, redshift=0.257800, T_inter=[0.1,60], /nh_ftools, /clean, /detect, /acis_i, n_bin=512
xwsm_lx ’obs_id’
xwsm_spec, ’obs_id’
xwsm_fit obs_id -Z
xwsm_map obs_id -bspline -donoho -ns_min.7
xwsm_map obs_id -Z -bspline -donoho -ns_min.7
xwsm_chandra,’obs_id’,/rebuild_cxb
xwsm_map_image, ‘a1835_zoom’, lx_min=.5, zoom=5, offset=[-.25,0], sigma=2
xwsm_map a1835_zoom -bspline -sigma2
