AIPS HELP file for MODSP in 31DEC24
As of Fri Apr 26 3:47:20 2024
MODSP: Task to alter I/V or RR/LL images adding models
INPUTS
INNAME Input I image name (name).
INCLASS Input I image name (class).
INSEQ 0.0 9999.0 Input I image name (seq. #).
INDISK 0.0 9.0 Input I image disk unit #.
IN2NAME Input V image name (name).
IN2CLASS Input V image name (class).
IN2SEQ 0.0 9999.0 Input V image name (seq. #).
IN2DISK 0.0 9.0 Input V image disk unit #.
OUTNAME Output image name (name).
OUTSEQ -1.0 9999.0 Output image name (seq. #).
OUTDISK 0.0 9.0 Output image disk unit #.
BLC Bottom left corner of input.
TRC Top right corner of input.
FLUX Noise level to add
FACTOR Multiplication factor.
INLIST List of sources up to 9999
New image parameters:
COORDINA Ra, Dec coordinates
IMSIZE Ra, Dec number of pixels
CELLSIZE Ra, Dec increments in asec
APARM (1) Frequency (GHz) plane 1
(2) increment (GHz)
(3) number channels
HELP SECTION
MODSP
Type: TASK
Use: This task can be used to modify a pair of existing image cubes of
either I/V or RR/LL polarization or create new ones. The idea is
to make spectral-line image cubes with or without RR/LL
differences.
Adverbs:
INNAME.....Input I or RR image name (name). No default.
INCLASS....Input I or RR image name (class). Standard defaults.
INSEQ......Input I or RR image name (seq. #). 0 => highest.
INDISK.....Disk drive # of input I or RR image. 0 => any.
IN2NAME....Input V or LL image name (name). No default.
IN2CLASS...Input V or LL image name (class). Standard defaults.
IN2SEQ.....Input V or LL image name (seq. #). 0 => highest.
IN3DISK....Disk drive # of input Q image. 0 => any.
OUTNAME....Output image name (name). Standard defaults.
Outclasses are IMODEL, QMODEL, and UMODEL
OUTSEQ.....Output image name (seq. #). 0 => highest unique.
OUTDISK....Disk drive # of output image. 0 => highest
number with sufficient space.
BLC........Bottom right corner in input image of desired
subimage. Default is entire image.
TRC........Top right corner in input image of desired
subimage. Default is entire image.
FLUX.......Noise level to be added (in the units of the image)
FACTOR.....Factor by which the original data is multiplied
before it is added to the model. 0 => drop original
data.
INLIST.....Text file containing one line per source, giving
RR, LL, X, Y, Maj, Min, PA, type, line center, width,
Dlc/Dx, Dlc/Dy, Dw/Dx, Dw/Dy
blank separated free format and trailing zeros FOLLOWING
WIDTH may be omitted. The resulting NGAUS will be the
number of non-comment lines in INLIST. Limit 9999.
(1) The RR and LL brightness is in Jy/beam;
(2) The component coordinates and size are X, Y, Maj
and Min are in pixels, PA in degrees;
(3) Types are point, Gaussian, uniform disk, uniform
rectangle, optically thin sphere, and exponential for
code numbers 1 through 6. Other values -> 2.
(4) line center and width of line (FWHM) are in channels
(5) line center and width may vary linearly in x and y
away from the stated values away from the component
center in channels/pixel
Blank lines and lines beginning with # or ; (semi-colon)
are taken as comments
If making a new image (INNAME blank with I polarization or
INNAME and/or IN2NAME and/or IN3NAME blank with I, Q, U) use
COORDINA...RA (hours minutes seconds of time), declination (degrees,
minutes, seconds of arc) for reference pixel (at image
center).
IMSIZE.....X, Y image size in pixels
CELLSIZE...X, Y image spacing in arc sec
APARM......(1) Reference frequency at first output plane in GHz
(2) Increment in frequency in GHz
(3) Number of frequency pixels
EXPLAIN SECTION