HESSI Data Object Parameters:  VIS_FWDFIT Algorithm Parameters

 

Links to other parameter tables:
     All      Spectrum (Standard, Info, All)      Lightcurve (Standard, Info, All)     
     Image:     General (Standard, Info, All),   Clean,   EM,   Forward Fit (ff),   MEM_GE (ge),   MEM_NJIT (nj),   Pixon,   UV_SMOOTH (uv),   VIS_CS,   VIS_FWDFIT (vf),   VIS_WV  
Spectral Response Matrix          Observing Summary          Simulation

 

Name Main Object Control / Info* Description Default Units Range Type** User Level*** Class
vf_absolute Image Control VF Alg: If set, generate fit by minimizing the sum of ABS(input visibility - model visibility) 0 -- 0 - 1 byte Expert hsi_vis_fwdfit
vf_circle Image Control VF Alg: If set, forces sources to be circular. OLD. Preferred method is to use vf_srcin. 0 -- 0 - 1 byte Standard hsi_vis_fwdfit
vf_det_index_mask_used Image Info VF Alg: Byte array showing which detectors were used to construct average used for normalization -- -- -- byte(9) N/A hsi_image_alg
vf_ell_major_fwhm Image Info VF Alg: FWHM of ellipse major axis -- arcsec -- pointer N/A hsi_vis_fwdfit
vf_ell_minor_fwhm Image Info VF Alg: FWHM of ellipse minor axis -- arcsec -- pointer N/A hsi_vis_fwdfit
vf_loop Image Control VF Alg: If set, fit to a loop. OLD. Preferred method is to use vf_srcin. 0 -- 0 - 1 int Standard hsi_vis_fwdfit
vf_looparc Image Info VF Alg: FWHM of loop arc length -- arcsec -- pointer N/A hsi_vis_fwdfit
vf_loopwidth Image Info VF Alg: FWHM of loop arc width -- arcsec -- pointer N/A hsi_vis_fwdfit
vf_maxiter Image Control VF Alg: Maximum number of iterations per stage 2000 -- -- long Standard hsi_vis_fwdfit
vf_multi Image Control VF Alg: If set, fit to a double source. OLD. Preferred method is to use vf_srcin. 0 -- 0 - 1 int Standard hsi_vis_fwdfit
vf_n_event_used Image Info VF Alg: Total counts in each detector used to make image -- -- -- long(9) N/A hsi_image_alg
vf_nfree Image Info VF Alg: Number of free parameters in fit -- -- -- int N/A hsi_vis_fwdfit
vf_niter Image Info VF Alg: Number of iterations done in fit -- -- -- int N/A hsi_vis_fwdfit
vf_noerr Image Control VF Alg: If set, forces fit to ignore input statistical errors 0 -- 0 - 1 byte Expert hsi_vis_fwdfit
vf_nophase Image Control VF Alg: If set, forces all input phases to zero 0 -- 0 - 1 byte Expert hsi_vis_fwdfit
vf_noplotfit Image Control VF Alg: If set, suppress plotfit display 0 -- 0 - 1 int Standard hsi_vis_fwdfit
vf_profile_coeff Image Info VF Alg: Consant, slope, correlation of fit of predicted to observed profile -- -- -- float(3,9) N/A hsi_image_alg
vf_profile_cstat Image Info VF Alg: Goodness of fit of image for each detector from comparison of predicted and observed profiles -- -- -- float(9) N/A hsi_image_alg
vf_profile_mc_cstat Image Info VF Alg: Monte Carlo C-statistic for each detector -- -- -- float(9) N/A hsi_image_alg
vf_profile_mc_fwhm Image Info VF Alg: Monte Carlo FWHM for each detector -- -- -- float(9) N/A hsi_image_alg
vf_profile_mc_tot_cstat Image Info VF Alg: Monte Carlo C-statistic for all detectors -- -- -- float N/A hsi_image_alg
vf_profile_mc_tot_fwhm Image Info VF Alg: Monte Carlo FWHM for all detectors -- -- -- float N/A hsi_image_alg
vf_profile_tot_cstat Image Info VF Alg: Overall goodness of fit of image from comparison of predicted and observed profiles' -- -- -- float N/A hsi_image_alg
vf_qflag Image Info VF Alg: Quality flag. Bits indicate the type of problem found. 0 means good fit -- -- -- int N/A hsi_vis_fwdfit
vf_redchi2 Image Info VF Alg: Reduced chi-square of fit -- -- -- float N/A hsi_vis_fwdfit
vf_sig_ell_major_fwhm Image Info VF Alg: One sigma value for FWHM of ellipse major axis -- arcsec -- pointer N/A hsi_vis_fwdfit
vf_sig_ell_minor_fwhm Image Info VF Alg: One sigma value for FWHM of ellipse minor axis -- arcsec -- pointer N/A hsi_vis_fwdfit
vf_siglooparc Image Info VF Alg: One sigma value for FWHM of loop arc length -- arcsec -- pointer N/A hsi_vis_fwdfit
vf_sigloopwidth Image Info VF Alg: One sigma value for FWHM of loop arc width -- arcsec -- pointer N/A hsi_vis_fwdfit
vf_sigma Image Info VF Alg: Structure(s) containing sigmas on fitted source parameters. One element per source. Tags are defined in {HSI_VIS_SRC_STRUCTURE}, (see hsi_vis_src_structure__define.pro) -- -- -- pointer N/A hsi_vis_fwdfit
vf_srcin Image Control VF Alg: Input source structure array. Starting point for fit. One element per source. Tags are defined in {HSI_VIS_SRC_STRUCTURE}, (see hsi_vis_src_structure__define.pro) -- -- -- pointer Standard hsi_vis_fwdfit
vf_srcout Image Info VF Alg: Structure(s) containing fitted source parameters. One element per source. Tags are defined in {HSI_VIS_SRC_STRUCTURE}, (see hsi_vis_src_structure__define.pro) -- -- -- pointer N/A hsi_vis_fwdfit
vf_vis_window Image Info VF Alg: Window ID for visibility fit plot -- -- -- int N/A hsi_vis_fwdfit
vf_viscomp_chisq_alldet Image Info VF Alg: Visibility comparison reduced chisq for all detectors -- -- -- float N/A hsi_image_alg
vf_viscomp_chisq_detsep Image Info VF Alg: Visibility comparison reduced chisq for each detector separately -- -- -- float(9) N/A hsi_image_alg
vf_viscomp_chisq_detused Image Info VF Alg: Visibility comparison reduced chisq for all detectors used in image -- -- -- float N/A hsi_image_alg

* Control Parameters are set by the user to control the software; Info parameters are informational output parameters.

** Note that for parameters whose type is 'pointer', you can set the parameter without making it a pointer first - the object will take care of that.  And when you retrieve a parameter that is a pointer, unless you use the /NO_DEREFERENCE keyword on the call to GET, the contents of the pointer will be returned, not the pointer.

*** User Levels are:
   Standard - parameters that most users will want to set
   Advanced - parameters that require a high level of familiarity with the software
   Expert - parameters that should never be set by users

Last updated 21-Dec-2020 by Kim Tolbert , 301-286-3965