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.
| Input image (FITS or CASA) | /home/lmtslr/work_lmt/2022S1SEQUOIACommissioning/93607/CHI-Cyg_93607.nf.fits |
| Output image (CASA) | x.im |
| Object | CHI-Cyg |
| Rest frequency | 86.243442 GHz |
| VLSR | 8.3 km/s (estimated) |
| Beam | 17.25" x 17.25" PA @ 0.00 deg |
| Imsize | 65 x 65 x 515 |
| Intensity unit | K |
| Data min/max | -7.660E-01 / 8.367E+00 |
| Telescope | LMT |
| Percentage bad pixels | 50.30% |
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 method | medabsdevmed |
| RMS value | 6.078E-02 |
| Dynamic range | 1.377E+02 |
| Data mean | 8.109E-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).
Peak point plot: Locations of per-channel peaks in the image cube x.im
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
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.
Table of source locations and sizes (not deconvolved)
| Name | RA | DEC | Flux | Peak | Major | Minor | PA | [] | [] | [] | [Jy] | [Jy/beam] | [arcsec] | [arcsec] | [deg] |
|---|---|---|---|---|---|---|---|
| 1.000E+00 | 00:00:00.034 | +00.00.06.99 | 7.549E+01 | 1.573E+01 | 4.546E+01 | 1.844E+01 | 3.260E+00 |
| 2.000E+00 | 00:00:00.030 | -00.01.05.76 | 6.785E+01 | 2.444E+01 | 4.272E+01 | 1.798E+01 | 1.753E+02 |
| 3.000E+00 | 23:59:59.929 | -00.00.31.54 | 1.115E+02 | 1.861E+01 | 3.750E+01 | 3.750E+01 | 3.191E-08 |
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[[32pix,33pix],[1pix,1pix]]](x.csp_0.png "Average Spectrum at centerbox[[32pix,33pix],[1pix,1pix]]")
Average Spectrum at centerbox[[32pix,33pix],[1pix,1pix]]
![Average Spectrum at centerbox[[00h00m00.034s,+00d00m06.99s],[1pix,1pix]]](x.csp_1.png "Average Spectrum at centerbox[[00h00m00.034s,+00d00m06.99s],[1pix,1pix]]")
Average Spectrum at centerbox[[00h00m00.034s,+00d00m06.99s],[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
| frequency | uid | formula | name | transition | velocity | El | Eu | linestrength | peakintensity | peakoffset | fwhm | startchan | endchan | peakrms | blend | force | [GHz] | [] | [] | [] | [] | [km/s] | [K] | [K] | [D^2] | [Jy/beam] | [km/s] | [km/s] | [] | [] | [] | [] | [] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 8.624E+01 | U_86.241 | NotIdentified | Not Identified | 0.000E+00 | 0.000E+00 | 0.000E+00 | 0.000E+00 | 1.059E+02 | 0.000E+00 | 4.256E+00 | 2.540E+02 | 2.620E+02 | 8.101E+01 | 0.000E+00 | False |
Potential lines overlaid on peak intensity plot from CubeStats_BDP.
Potential lines overlaid on minimum intensity plot from CubeStats_BDP.
Detected line segments from input spectrum #0.
Detected line segments from input spectrum #1.
Identified segments overlaid on Signal/Noise plot of all spectra.
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
| frequency | uid | formula | name | transition | velocity | El | Eu | linestrength | peakintensity | peakoffset | fwhm | startchan | endchan | peakrms | blend | force | [GHz] | [] | [] | [] | [] | [km/s] | [K] | [K] | [D^2] | [Jy/beam] | [km/s] | [km/s] | [] | [] | [] | [] | [] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 8.624E+01 | (CH3)2CO_86.24385 | (CH3)2COv=0 | Acetone | 45(28,17)-45(27,18)AA | 6.653E+00 | 8.403E+02 | 8.445E+02 | 2.953E+03 | 1.385E+02 | -1.669E+00 | 4.107E+00 | 2.540E+02 | 2.610E+02 | 1.059E+02 | 0.000E+00 | False |
Potential lines overlaid on peak 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 #1.
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 Name | Start Channel | End Channel | Output Cube | [] | [int] | [int] | [] |
|---|---|---|---|---|
| (CH3)2CO_86.24385 | 2.490E+02 | 2.660E+02 | x.(CH3)2CO_86.24385/lc.im |
Moment_AT creates moment maps using custom clip levels.
Moment_AT output for x.(CH3)2CO_86.24385/lc.im
2CO_86.24385/lc.mom_0.png "Acetone Moment 0 map of Source CHI-Cyg")
Acetone Moment 0 map of Source CHI-Cyg
2CO_86.24385/lc.mom_1.png "Acetone Moment 1 map of Source CHI-Cyg")
Acetone Moment 1 map of Source CHI-Cyg
2CO_86.24385/lc.mom_2.png "Acetone Moment 2 map of Source CHI-Cyg")
Acetone Moment 2 map of Source CHI-Cyg
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.(CH3)2CO_86.24385/lc.im
![Average Spectrum at centerbox[[32pix,33pix],[1pix,1pix]]](x.(CH3)2CO_86.24385/lc-@1.csp_0.png "Average Spectrum at centerbox[[32pix,33pix],[1pix,1pix]]")
Average Spectrum at centerbox[[32pix,33pix],[1pix,1pix]]
Moment_AT creates moment maps using custom clip levels.
Moment_AT output for x.im
