ngc1566

[ashleythomasbarnes]

The QA report checklist for this galaxy
Please complete as you progress through the QA
All data for galaxies can be obtained here

Checklist

• tp - check baseline of single-dish image
• tp - check for artefacts in single-dish image

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• 7m - check residual map
• 7m - check baseline of 7m image (i.e. in continuum subtraction okay?)
• 7m - check for negative bowls in 7m image
• 7m - check for artefacts in 7m image (linear features in map, large fluxes etc)

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• 7m+tp - check baseline of 7m image (i.e. in continuum subtraction okay?)
• 7m+tp - check for negative bowls in 7m image
• 7m+tp - check for artefacts in 7m image (linear features in map, large fluxes etc)
• 7m+tp - compare to the single dish image (fluxes okay?)

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• Dataset science ready?

Annie: OK for science. Only non/marginal detections. Some negative bias in the baselines of CS, but since there is no strong emission, not clear that it's worth investing time to improve it.

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[msannih]

ngc1566 65.0016 -54.9380 1483.27
04:20:00.384 -54:56:16.80 1483

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CS Cubes summary

• SD has restricted velocity range compared to 7m
• no clear detection in SD

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• CS tp - check baseline of single-dish image
• [] CS tp - other artifacts in single-dish image
• CS tp - header information
• CS tp - total flux (inside mask) = -1.7Jy (-1.5Jy.km/s)
• CS tp - mean pixel intensity = -1.3e-3 Jy/beam
• CS tp - peak intensity in cube = 0.2 Jy/beam
• CS tp - RMS cube = 0.03 Jy/beam

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• CS 7m - residual map
• CS 7m - check baseline of 7m image
• CS 7m - negative bowls?
• CS 7m - other artifacts in 7m image
• CS 7m - header information
• [x]CS 7m - total flux = 1.1 Jy
• CS 7m - total flux pbcorr = 1.8 Jy
• CS 7m - total flux in residual map = 0.6 Jy
• CS 7m - peak intensity in cube = 4e-2Jy/beam
• CS 7m - RMS cube = 9e-3 Jy/beam
• CS 7m - RMS residuals = 8e-3 Jy/beam

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• CS 7m+tp - residual map
• CS 7m+tp - check baseline of 7m+tp image
• CS 7m+tp - negative bowls?
• CS 7m+tp - other artifacts in 7m image
• CS 7m+tp - header information
• CS 7m+tp - total flux pbcorr (inside mask) = -1.4 Jy (-1.5Jy/kms)
• CS 7m+tp - peak intensity in cube = 0.09Jy/beam
• CS 7m+tp - RMS noise in cube = 1.5e-2Jy/beam
• CS 7m+tp - flux agrees with SD? = YES

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HCN Cubes summary

• SD has restricted velocity range compared to 7m
• noisy detection in SD

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• HCN tp - check baseline of single-dish image
• [] HCN tp - other artifacts in single-dish image
• HCN tp -- header information
• HCN tp -- total flux (inside mask)= 2.1Jy (16.5Jy/km.s)
• HCN tp -- peak intensity in cube = 0.15 Jy/beam
• HCN tp -- mean pixel intensity = 2.2e-3Jy/beam
• HCN tp -- RMS noise = 0.03 Jy/beam

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• HCN 7m - residual map
• HCN 7m - check baseline of 7m image
• HCN 7m - negative bowls?
• HCN 7m - other artifacts in 7m image
• HCN 7m - header information
• HCN 7m -- total flux = 0.2 Jy
• HCN 7m - total flux pbcorr = -0.7 Jy
• HCN 7m - total flux in residual map = -0.5 Jy
• HCN 7m -- peak intensity in cube = 4e-2 Jy/beam
• HCN 7m -- RMS noise = 7e-3Jy/beam
• HCN 7m - RMS residuals = 7e-3Jy/beam

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• HCN 7m+tp - check baseline of 7m+tp image
• HCN 7m+tp - negative bowls?
• HCN 7m+tp - other artifacts in 7m image
• HCN 7m+tp - header information
• HCN 7m+tp - total flux pbcorr = 1.6 Jy
• HCN 7m+tp - peak intensity in cube = 0.09Jy/beam
• HCN 7m+tp - RMS noise = 1.4e-2Jy/beam
• HCN 7m+tp - flux agrees with SD? YES

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HCO+ Cubes summary

• SD has restricted velocity range compared to 7m
• noisy detection in SD

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• HCO+ tp - check baseline of single-dish image
• HCO+ tp - other artifacts in single-dish image
• HCO+ tp -- header information
• HCO+ tp -- total flux (inside mask) = 0.5Jy (16.4Jy/km.s)
• HCO+ tp -- peak intensity in cube = 0.15 Jy/beam
• HCO+ tp -- RMS noise = 0.03 Jy/beam
• HCO+ tp -- mean pixel intensity = 5e-4Jy/beam

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• HCO+ 7m - residual map
• HCO+ 7m - check baseline of 7m image
• HCO+ 7m - negative bowls?
• HCO+ 7m - other artifacts in 7m image
• HCO+ 7m - header information
• HCO+ 7m -- total flux = 1.3 Jy
• HCO+ 7m - total flux pbcorr = 1.8 Jy
• HCO+ 7m -- total flux in residual = 0.1 Jy
• HCO+ 7m -- peak intensity in cube = 4e-2 Jy/beam
• HCO+ 7m -- RMS noise = 8e-3 Jy/beam
• HCO+ 7m -- RMS residuals = 8e-3 Jy/beam

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• HCO+ 7m+tp - check baseline of 7m+tp image
• HCO+ 7m+tp - negative bowls?
• HCO+ 7m+tp - other artifacts in 7m image
• HCO+ 7m+tp - header information
• HCO+ 7m+tp - total flux pbcorr = 0.8 Jy
• HCO+ 7m+tp - peak intensity in cube = 0.09Jy/beam
• HCO+ 7m+tp - RMS noise = 1.5e-2Jy/beam
• HCO+ 7m+tp - flux agrees with SD? = YES

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[ashleythomasbarnes]

HCN

TP: Good - no detection
7m image: Good - weak detection towards centre
7m mask: Good
7m residuals: Good
7m+TP (round): Good - but noise so hard to tell if flux conserved

HCO+

TP: Good - no detection
7m image: Good - noise spike in chan36 (not inc. in mask)
7m mask: Good
7m residuals: Good
7m+TP (round): Good - but noise so hard to tell if flux conserve

CS

TP: Minor - baseline below zero (but within noise)
7m image: Good
7m mask: Good
7m residuals: Good
7m+TP (round): Good - no detection - maybe baseline a little below zero

[ashleythomasbarnes]

Weak HCN detection in 7m only towards centre

[ashleythomasbarnes]

Baseline of CS total power below zero (but within noise)?

[ashleythomasbarnes]

I am happy to set this as a pass for science - only very minor issues - please confirm @msannih

[ashleythomasbarnes]

Note @msannih comment about velocity range of SD being a little restricted