This diagram is a directed acyclic graph representing the ADMIT Task connections for the flow. Each arrow represents the connection from an ADMIT task output to the input of another ADMIT Task. The integer next to each arrow is the zero-based index of the ADMIT Task's output BDP. Note any output BDP may be used as the input for more than one ADMIT Task.


ADMIT Flow Diagram

Ingest_AT reads in a FITS image into ADMIT, creating a CASA image and extracting basic information. It is usually the first step in any ADMIT flow.


Image Information
FITS image x.fits
CASA image x.im
ObjectNGC3256
Rest frequency115.271202 GHz
VLSR2794.2 km/s (estimated)
Beam 6.85" x 4.51" PA @ 52.96 deg
Imsize128 x 128 x 50
Intensity unitJy/beam
Data min/max-1.113E-01  /  1.540E+00
TelescopeALMA
Percentage bad pixels2.00%

CubeStats_AT computes image-plane robust statistics on datacubes. These statistics are particularly useful for identifying spectral lines in images where the noise varies as a funnction of frequency.

CASA image x.im
RMS methodmedabsdevmed
RMS value1.131E-03
Dynamic range1.361E+03
Data mean8.325E-04
Emission characteristics as a function of channel, as derived by CubeStats_AT (cyan: global rms, green: noise per channel, blue: peak value per channel, red: peak/noise per channel).
Emission characteristics as a function of channel, as derived by CubeStats_AT (cyan: global rms, green: noise per channel, blue: peak value per channel, red: peak/noise per channel).

CubeSum_AT sums all the emission in a cube, regardless of whether or not it comes from different spectral lines, creating a integrated map of all emission.


CubeSum_AT output for x.im

Integral (moment 0) of all emission in image cube
Integral (moment 0) of all emission in image cube

CubeSpectrum_AT computes spectra at one or more (x,y) positions in the datacube. Alternatively, it can produce a spectrum averaged over a box.


CubeSpectrum_AT output for image x.im

Average Spectrum at centerbox[[68pix,63pix],[1pix,1pix]]
Average Spectrum at centerbox[[68pix,63pix],[1pix,1pix]]
Average Spectrum at centerbox[[69pix,63pix],[1pix,1pix]]
Average Spectrum at centerbox[[69pix,63pix],[1pix,1pix]]

LineSegment_AT identifies regions in one or more spectrum that have contiguous emission above a user specified noise floor. The input spectra are CubeSpectrum_AT or CubeStats_AT.



Line Segments

frequencyuidformulanametransitionvelocityElEulinestrengthpeakintensitypeakoffsetfwhmstartchanendchanpeakrmsblendforce
[GHz][][][][][km/s][K][K][D^2][Jy/beam][km/s][km/s][][][][][]
1.142E+02 U_114.188 Not Identified Not Identified Not Identified 0.000E+00 0.000E+00 0.000E+00 0.000E+00 9.977E+01 0.000E+00 4.199E+02 1.600E+01 3.200E+01 1.207E+02 0.000E+00 False
1.142E+02 U_114.173 NotIdentified Not Identified 0.000E+00 0.000E+00 0.000E+00 0.000E+00 1.458E+00 0.000E+00 1.585E+02 1.600E+01 3.000E+01 1.860E+03 0.000E+00 False
1.142E+02 U_114.165 NotIdentified Not Identified 0.000E+00 0.000E+00 0.000E+00 0.000E+00 1.540E+00 0.000E+00 1.465E+02 1.600E+01 2.900E+01 1.791E+03 0.000E+00 False
Potential lines overlaid on peak intensity plot from CubeStats_BDP.
Potential lines overlaid on peak intensity plot from CubeStats_BDP.
Potential lines overlaid on minimum intensity plot from CubeStats_BDP.
Potential lines overlaid on minimum intensity plot from CubeStats_BDP.
Detected line segments overlaid on input spectrum #0.
Detected line segments overlaid on input spectrum #0.
Detected line segments overlaid on input spectrum #1.
Detected line segments overlaid on input spectrum #1.
Identified segments overlaid on Signal/Noise plot of all spectra.
Identified segments overlaid on Signal/Noise plot of all spectra.

ContinuumSub_AT Subtracts the continuum, using segments where no line emission is expected.


ContinuumSub_AT output for casaimage

Continuum map
Continuum map

CubeStats_AT computes image-plane robust statistics on datacubes. These statistics are particularly useful for identifying spectral lines in images where the noise varies as a funnction of frequency.

CASA image x-cs.cim
RMS methodmedabsdevmed
RMS value2.674E-04
Dynamic range3.812E+00
Data mean-2.327E-06

SFind2D_AT creates a list of sources found in a 2D image based on the noise statistics in the image as determined by CubeStats.

Image of input map with sources found by SFind2D overlayed in green.
Image of input map with sources found by SFind2D overlayed in green.

Table of source locations and sizes (not deconvolved)

NameRADECFluxPeakMajorMinorPA
[][][][Jy][Jy/beam][arcsec][arcsec][deg]

CubeStats_AT computes image-plane robust statistics on datacubes. These statistics are particularly useful for identifying spectral lines in images where the noise varies as a funnction of frequency.

CASA image x-cs.lim
RMS methodmedabsdevmed
RMS value1.127E-03
Dynamic range1.367E+03
Data mean8.348E-04
Emission characteristics as a function of channel, as derived by CubeStats_AT (cyan: global rms, green: noise per channel, blue: peak value per channel, red: peak/noise per channel).
Emission characteristics as a function of channel, as derived by CubeStats_AT (cyan: global rms, green: noise per channel, blue: peak value per channel, red: peak/noise per channel).

CubeSum_AT sums all the emission in a cube, regardless of whether or not it comes from different spectral lines, creating a integrated map of all emission.


CubeSum_AT output for x-cs.lim

Integral (moment 0) of all emission in image cube
Integral (moment 0) of all emission in image cube

CubeSum_AT sums all the emission in a cube, regardless of whether or not it comes from different spectral lines, creating a integrated map of all emission.


CubeSum_AT output for x-cs.lim

Integral (moment 0) of all emission in image cube
Integral (moment 0) of all emission in image cube

CubeSum_AT sums all the emission in a cube, regardless of whether or not it comes from different spectral lines, creating a integrated map of all emission.


CubeSum_AT output for x-cs.lim

Integral (moment 0) of all emission in image cube
Integral (moment 0) of all emission in image cube

CubeSpectrum_AT computes spectra at one or more (x,y) positions in the datacube. Alternatively, it can produce a spectrum averaged over a box.


CubeSpectrum_AT output for image x-cs.lim

Average Spectrum at centerbox[[68pix,63pix],[1pix,1pix]]
Average Spectrum at centerbox[[68pix,63pix],[1pix,1pix]]

PVSlice creates position velocity diagrams through a datacube.


PVSlice_AT output for x-cs.lim

Location of position-velocity slice overlaid on a CubeSum map
Location of position-velocity slice overlaid on a CubeSum map
Position-velocity diagram through emission centroid
Position-velocity diagram through emission centroid

PVCorr_AT computes a cross-correlation of a PVSlice, looking for repeated patterns to detect spectral lines. For cubes with multiple spectral lines, this method can improve detection of weak ones.


PVCorr_AT output for x-cs.pv

Position-velocity correlation plot
Position-velocity correlation plot

LineID_AT identifies spectral lines in an input datacube, using either one or more input spectra from CubeSpectrum_AT or CubeStats_AT.


Identified Spectral Lines


Identified Spectral Lines

frequencyuidformulanametransitionvelocityElEulinestrengthpeakintensitypeakoffsetfwhmstartchanendchanpeakrmsblendforce
[GHz][][][][][km/s][K][K][D^2][Jy/beam][km/s][km/s][][][][][]
1.153E+02 CO_115.27120 CO Carbon Monoxide 1-0 2.731E+03 0.000E+00 5.532E+00 1.212E-02 8.428E+01 -6.334E+01 1.177E+01 1.600E+01 3.200E+01 9.835E+01 0.000E+00 False
Potential lines overlaid on peak intensity plot from CubeStats_BDP.
Potential lines overlaid on peak intensity plot from CubeStats_BDP.
Potential lines overlaid on minimum intensity plot from CubeStats_BDP.
Potential lines overlaid on minimum intensity plot from CubeStats_BDP.
Identified lines overlaid on input spectrum #0.
Identified lines overlaid on input spectrum #0.
Identified lines overlaid on Signal/Noise plot of all spectra.
Identified lines overlaid on Signal/Noise plot of all spectra.

LineCube_AT makes one or more cutout cubes given a LineList. The purpose is to make small datacubes of the emission of individual spectral lines from a larger cube.


LineCube_AT created the following cubes

Parameters of Line Cubes

Line NameStart ChannelEnd ChannelOutput Cube
[][int][int][]
CO_115.27120 6.000E+00 4.200E+01 CO_115.27120/CO_115.27120.lc.im

Moment_AT creates moment maps using custom clip levels.


Moment_AT output for CO_115.27120/CO_115.27120.lc.im

Carbon Monoxide Moment 0 map of Source NGC3256
Carbon Monoxide Moment 0 map of Source NGC3256

CubeSpectrum_AT computes spectra at one or more (x,y) positions in the datacube. Alternatively, it can produce a spectrum averaged over a box.


CubeSpectrum_AT output for image CO_115.27120/CO_115.27120.lc.im

Average Spectrum at centerbox[[68pix,63pix],[1pix,1pix]]
Average Spectrum at centerbox[[68pix,63pix],[1pix,1pix]]

Moment_AT creates moment maps using custom clip levels.


Moment_AT output for x-cs.lim

Unidentified Moment 0 map of Source NGC3256
Unidentified Moment 0 map of Source NGC3256