MIDAS Commands

A full description of the echelle commands is given in the Appendix D. We include here a brief summary for quick reference. The echelle package is hierarchically organised from low-level commands (level 0) to high-level commands (level 3). The organization is a result of the following classification:

• Level 0.
  Apart from the level 0 command LOAD/ECHELLE, the user will make seldom use of level 0 commands. All parameters of these commands must be provided on the command line. The user may use these commands to benefit from options non available from higher level commands.
• Level 1.
  Level 1 commands perform the individual steps of the reduction. Parameters may be provided on the command line (thus updating the echelle keywords) or will be read from the echelle keywords (set by command SET/ECHELLE). Level 1 command enable to check individual steps of the reduction.
• Level 2.
  Level 2 commands perform high level steps of the reduction. The level 2 set of commands is self-consistent and enables to perform a complete reduction, with the optional use of verification lower level commands PLOT/ECHELLE, PLOT/IDENT, LOAD/IDENT, PLOT/RESIDUAL, LOAD/ECHELLE. Apart from method keywords and input/output images, no parameter value is required on the command line, all keywords being updated by INIT/ECHELLE and SET/ECHELLE commands.
• Level 3.
  The higher level 3 includes only two very general commands. The SET/CONTEXT initializes echelle keyword values and TUTORIAL/ECHELLE provides a demonstration of the package.

 

Table 7.2: Echelle Level-3 Commands

SET/CONTEXT echelle
TUTORIAL/ECHELLE

 

 

Table 7.3: Echelle Level-2 Commands

Echelle reduction commands
CALIBRATE/ECHELLE	[defmtd] [wlcmtd]
FLAT/ECHELLE	[flat] [correct] [blazeff]
FILTER/ECHELLE	input output
PREPARE/WINDOW	catalog flatbkg lhcuts
RESPONSE/ECHELLE	[std] [fluxtab] [response]
REPEAT/ECHELLE	[scalx,scaly] [response]
REDUCE/ECHELLE	input output [bkcor]
ROTATE/ECHELLE	catalog root-name [mode]
SELECT/BACKGROUND	[all]
SCAN/ECHELLE	frame [scan-par]
Session manager commands
HELP/ECHELLE	[param]
INIT/ECHELLE	[name]
SAVE/ECHELLE	name
SET/ECHELLE	par=value
SHOW/ECHELLE

 

 

Table 7.4: Echelle Level-1 Commands

BACKGROUND/SMOOTH	input output [radx,rady] [niter] [visu]
BACKGROUND/ECHELLE	in out [radx,rady,step] [degree] [smooth] [method]
DEFINE/ECHELLE	[ordref] [width1,thres1,slope] [defmtd] [defpol]
DEFINE/HOUGH	[ordref] [nbord] [hwid] [hough_par] [thresh] [degx,degy] [hot_thres,step]
DEFINE/SKY	ima [nsky] [possky] [half-width]
EXTRACT/ECHELLE	input output slit[,offset] [method]
EXTRACT/SKY	in out [mode]
LOAD/IDENTIFICATIONS
MERGE/ECHELLE	input output [params] [method]
IDENTIFY/ECHELLE	[wlc] [lincat] [dc] [tol] [wlcloop] [wlcmtd] [guess]
PLOT/ECHELLE	frame [ord1,ord2] [printer]
PLOT/IDENT	frame [ord1,ord2] [printer]
PLOT/RESIDUALS	[ord1,ord2]
PLOT/SPECTRUM	in [start,end]
REBIN/ECHELLE	input output [sample]
RIPPLE/ECHELLE	input output [params] [method] [option]
SEARCH/ECHELLE	input [width2,thres2]
SUBTRACT/BACKGR	input backgr output [bkgmtd] [bkgvisu]

 

 

Table 7.5: Echelle Level-0 Commands

AVERAGE/TABLE	frame table columns outcol rad (No on-line help)
EXTRACT/ORDER	in out slit,angle,offset meth table coeffs [ord1,ord2] (No on-line help)
EXTRACT/OPTIMAL
HOUGH/ECHELLE	input [scan] [step,nbtr] [nbord] [flags] [hwid] [thres]
LOAD/ECHELLE
PREPARE/BACKGROUND	input [step] [init] [back_tab] [order_tab] [descr]
REGRESSION/ECHELLE	[defpol] [niter] [absres] [kappa]
SEARCH/ORDER	[ordref] [w,t,s] [outtab] [defmtd]
VERIFY/ECHELLE	file [type]