next up previous contents
Next: Configuring FITS Keywords Up: Setup Previous: Grism Image

Tunable Parameters

 
Tunable Parameters (default values)
   
ADCGAIN 12.83 ; Analog/digital conversion gain
BADPIX_THRESH 50.0 ; Percent of allowable bad pixels before object discarded
BG_PIXELS 2 ; Width of region for background estimate in pixels
BLEND_FACTOR 2 ; Blending factor for merging gauss lines
CONT_FACTOR 2.5 ; Continuum factor
DAO_THRESH 2 ; Brightness threshold for daofind
DEBLEND_ERR_MIN 0.1 ; Deblending error minimum
DET_THRESH 2 ; Spectral line search point detection threshold
EXTOBJ_THRESH 0.3 ; 0.0 = extended object, 1.0 = star
FIT_ORDER1 3 ; Polynomial fit order for first run of polyfit
FIT_ORDER2 4 ; Polynomial fit order subsequent runs of polyfit
MAXLINES 24 ; Maximum number of lines to keep
MAXOBJS 400 ; Maximum number of objects to create for sextractor
MAXPIX 256 ; Maximum number of pixels on grism (per dimension)
MAXPIXX 1024 ; Maximum width of grism image in pixel (not used)
MAXPIXY 1024 ; Maximum height of grism image in pixel (not used)
MIN_NPOINTS 20 ; Minimum number of points for fitting
MIN_PIX_NO 10 ; Minimum acceptable line width
MIN_SIGNSE 7 ; Minimum allowable signal/noise value of lines
N_ITERATIONS 10 ; Maximum number of fit iterations
N_ITERLOW 4 ; Iteration number where 2nd fit order param is used
O_THRESH1 0.05 ; First overlap threshold for deblending
O_THRESH2 2.0 ; Second overlap threshold for deblending
O_THRESH3 3.0 ; Third overlap threshold for deblending
REJ_THRESH 3 ; Object rejection threshold
SZ_FACTOR 2 ; 2nd order mom factor of extended obj from sextractor
WEIGHTPERC 1.00 ; % of max to truncate when not using weights
DEBUG_LEVEL 10 ; Debugging level
NOFLATFIELD 0 ; Turn off/on (1/0) flatfielding
NOBACKGND 0 ; Turn off/on (1/0) background subtraction
NOINTERPOL 0 ; Turn off/on (1/0) interpolated bavkground subtraction
NODTQ 0 ; Turn off/on (1/0) Data Quality check
POS_ERR 0.50 ; Error estimate (in pixel) of the object position.
PUNITSW dn ; Plot units (dn, mjy, or erg)
NODEBL 1.00 ; Turn off/on (1/0) Deblending. (Calnic-C ONLY!)
NOWEIGH 1.00 ; Turn off/on (1/0) Weighting. (Calnic-C ONLY!)


next up previous contents
Next: Configuring FITS Keywords Up: Setup Previous: Grism Image
Wolfram Freudling
5/29/1999