Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.atnf.csiro.au/computing/software/gipsy/tsk/profil.dc1 Дата изменения: Tue Mar 10 12:28:43 1998 Дата индексирования: Fri Jan 16 01:13:11 2009 Кодировка: Поисковые слова: cygnus

Program: PROFIL

Purpose: Creates an integrated line profile over a selected
area of an input data cube

Category: COMBINATION

File: profil.shl

Author: C. G. De Pree (resp. M. Vogelaar)
Adapted from the aid.shl file, and the
PROFIL program created by M. Goss.

Keywords:

INSET= Input set (and subsets). Maximum number of subsets
is 2048. In general this is the LINE data set.

BOX= Frame for input subsets. [entire subset]

SETX= Set name and subset(s) which operate on the input set.
This is in general the CONTINUUM data set.

BOXX= The axis sizes of the subset box of 'SET' have to be
equal to the axis sizes of the subset box of 'SETX'.
If using comparable subsets (i.e. same axis names,
same grids and origins), this keyword is hidden.

OUTSET= Output set and subset(s) for the result.
The output set has the size of the selected BOX.
The result of PROFIL is placed in the lower
left hand corner of the OUTSET box.

WTYPE= The weighting type chosen by the user. Line data may
be weighted in the following ways:
[0] No weighting. Creates an integrated profile
in the specified box
[1] Continuum weighting. Creates an integrated
profile in the specified box weighted by the
continuum image.
[2] Continuum squared. As above, but with weighting
by the square of the continuum.
[3] Mean. Creates a mean line profile in the
specified box.
For all of the weighting types, a continuum
cutoff may be specified.

LC= [Y/N] For weight types 1, 2, and 3, user may request
that a line to continuum ratio profile be generated.
If LC=N, then PROFIL will simply print a line to continuum
ratio normalization factor (appropriate to the weighting
selected) to the HERMES window at the completion of the PROFIL
task. Then the peak value may be divided by this factor
to simply derive line to continuum ratio.

MASK= [Y/N] User may request that the line profile
only be integrated in regions above a specified
threshold level in the continuum image.

THRESHOLD=
User specified threshold level (Jy) of the
continuum image. The line profile is integrated
only in pixels that have continuum flux density
above the specified cutoff.

Description:

PROFIL is a task designed to generate integrated
line profiles over a specified box in a data cube.
The user enters a LINE image, a CONTINUUM image,
and a box in which to integrate. PROFIL then requests
a weighting type (see above) and whether or not the
user wants to use a continum threshold. If a continuum
threshold is requested, PROFIL asks for a cutoff
level (in Jy) that should be used. The pixels
tested for cutoff are in the continuum image. PROFIL
then generates an integrated line profile and places
the result in the lower left hand corner pixel of the
output data set. The OUTSET has the size of the requested
box, with the number of channels of the INSET. This
output set can then be viewed with PPLOT (by specifying
the lower left corner pixel), or fit with PROFIT.

Remarks:
Input and file combination routines are
adapted from the aid.shl file
Original PROFIL program created by W.M. Goss

Updates: June 23, 1994: Document created.

July 1, 1994: Documentation added
Mar 10, 1998, VOG: Replaced constant 1 in gdsd_write
by variable.


Declaration of parameters:
Declarations for GDSINP:
Declarations for GDSBOX:
Declarations for GDSOUT:
Functions:
Variables for the algorithms:
Declarations for the counters in the summation loop
Continuum threshold level
Miscellaneous:
The size of the input set will be copied to the output set.
It is possible to work on a smaller area. Therefore we need
the grid coordinates of the frame ('Fedge') and
the coordinates of the user defined box ('Bedge').
Options in GDSBOX:
1 box may exceed subset size
2 default is in BLO
4 default is in BHI
8 box restricted to size defined in BHI
These codes work additive.