AIPS HELP file for RM2PL in 31DEC24
As of Thu Apr 25 22:28:18 2024
RM2PL: Plots spectrum of a pixel with RMFIT fit
INPUTS
INNAME Input Q image name (name)
INCLASS Input Q image name (class)
INSEQ 0.0 9999.0 Input Q image name (seq. #)
INDISK 0.0 9.0 Input Q image disk unit #
IN2NAME Input U image name (name)
IN2CLASS Input U image name (class)
IN2SEQ 0.0 9999.0 Input U image name (seq. #)
IN2DISK 0.0 9.0 Input U image disk unit #
INVERS 0.0 RM table version
APARM (1,2) RA, Dec pixel
(3,4) Q/P value range
(5,6) U/A value range
(7,8) Average box size in
Ra, Dec
(9) > 0 average even if no
model
(10) > 0 => plot total
polarization and angle
BPARM (1) > 0 plot Q/P data
(2) > 0 plot Q/P model
(3) > 0 plot Q/P residual
(4) > 0 plot Q/P model comps
(6) > 0 plot U/A data
(7) > 0 plot U/A model
(8) > 0 plot U/A residual
(9) > 0 plot U/A model comps
CPARM (1) Plot begin channel
(2) Plot end channel
(3) Fraction of plot for U
(4) X axis type: 0 channels
1 freq, 2 lambda,
3 lambda^2
(5) > 0 plot X axis reversed
(6) > 0 plot Q/P and U/A with
directly connected points
OUTTEXT
Text file to contain data,
model sum and model comps
plus fit parameters at each
pixel
XYRATIO 0.0 X to Y ratio of plot: 0 ->
1 or fit to TV
LTYPE -410.0 410.0 Type of labeling: 1 border,
2 no ticks, 3 standard, 4 rel
to center, 5 rel to subim cen
6 pixels, 7-10 as 3-6 with
only tick labels
<0 -> no date/time
DOTV -1.0 > 0 Do plot on the TV, else
make a plot file
GRCHAN 0.0 8.0 Graphics channel 0 => 1.
HELP SECTION
RM2PL
Task: Makes a plot as a plot file or on the TV of the spectrum taken
from a transposed image cube. It plots the data from a single
pixel or the average of a rectangular or circular region
centered on the pixel. It will normally be used after running
RMFIT. The plot consists of an upper part with the Q
polarization parts of the plot ("Q") and a lower part with the
U/A polarization parts. If the U image is not specified, or no U
plot types are requested, then the lower portion is omitted.
The "Q" image must be present, but if no Q/P plot types are
selected, then the Q/P portion of the plot is omitted. The U
image must be present or the APARM(10) option to plot total
polarization and polarization angle will be supressed.
See also AIPS Memo 118, "Modeling spectral cubes in AIPS",
January 2016 for a more detailed description of the use of this
task.
Adverbs:
INNAME.....Transposed Q image name (name). Standard defaults.
INCLASS....Transposed Q image name (class). Standard defaults.
INSEQ......Transposed Q image name (seq. #). 0 => highest.
INDISK.....Transposed Q image disk #. 0 => any.
IN2NAME....Transposed U image name (name). Standard defaults.
IN2CLASS...Transposed U image name (class). Standard defaults.
IN2SEQ.....Transposed U image name (seq. #). 0 => highest.
IN2DISK....Transposed U image disk #. 0 => any.
INVERS.....RM table version: 0 => highest
APARM......(1,2) RA, Dec pixel NO DEFAULT
(3,4) Q value plot range, min to max. If max <= min,
self-scale Q plot
(5,6) U value plot range, min to max. If max <= min,
self-scale Q plot
(7,8) Average over a box 2*APARM(7)+1 by 2+APARM(8)+1
in the RA, Dec coordinates around APARM(1,2)
If APARM(7) < 0, use APARM(8) as a radius in pixels
of a circle surrounding APARM(1,2).
(9) > 0 => include pixels in average even if no model
(10) > 0 => plot/print total polarization and
polarization angle instead of Q and U - but only if
both images are specified.
BPARM......(1) > 0 plot Q data from INNAME at the pixel given by
APARM(1) and APARM(2) (axes 2 and 3 in the
transposed image)
(2) > 0 plot Q model sum at the pixel from XG table
INVERS
(3) > 0 plot Q data minus model
(4) > 0 plot Q model individual components from XG table
INVERS at the pixel
(6) > 0 plot U data from IN2NAME at the pixel given by
APARM(1) and APARM(2) (axes 2 and 3 in the
transposed image)
(7) > 0 plot U model sum at the pixel from the XG and ZE
tables
(8) > 0 plot U data - model
(9) > 0 plot U model individual components from the XG
and ZE tables
CPARM......(1) The data are computed and printed over all spectral
channels in the image (first axis). Those plotted
may be restricted to a smaller range from CPARM(1)
through CPARM(2). Default is full range.
(2) Highest channel plotted.
(3) Fraction of vertical axis for the U plot. 0 -> 0.5.
(4) type of X axis label: 1 frequency, 2 wavelength, 3
wavelength squared, else channels
(5) > 0 => plot data in reverse order (on X axis)
(6) <= 0 => Q and U data are plotted with step lines
> 0 => Q and U points are directly connected
Models, resduals, and model components are all
plotted with directconnections.
OUTTEXT....If not blank, print the model values at each pixel
included in the average. Then print a table of the Q
spectrum and model followed by a table of the U data
and model. The columns in the table are the channel
number, the wavelength squared times 1000, the input
data, the sum of the model components, the difference of
the data and the model, and the Stokes amplitude of each
of the model components.
XYRATIO....Scale the X axis relative to the Y by XYRATIO.
If DOTV > 0, 0 -> fit to the TV window
If DOTV <= 0, 0 -> 1.
LTYPE......Labelling type, see HELP LTYPE for details:
1 = border, 2 = no ticks, 3 or 7 = standard, 4 or 8 =
relative to ref. pixel, 5 or 9 = relative to subimage
(BLC, TRC) center, 6 or 10 = pixels. 7-10 all labels
other than tick numbers and axis type are omitted.
Less than 0 is the same except that the plot file
version number and create time are omitted.
Add n * 100 to alter the metric scaling.
DOTV.......> 0 => plot directly on the TV device, otherwise
make a plot file for later display on one or
more devices (including the TV if desired).
GRCHAN.....Graphics channel (1 - 7) to use for line drawing.
0 => use 1 for labeling and model, 2 for data, 3 for
residual, and 4 for components. In this way color will
help you separate the various types of plot.
EXPLAIN SECTION