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Execution Block ID uid://A001/X15b4/X37 Sgr_A_st_b_updated_03_7M #162

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keflavich opened this issue Jun 14, 2022 · 7 comments
Open
14 of 15 tasks

Execution Block ID uid://A001/X15b4/X37 Sgr_A_st_b_updated_03_7M #162

keflavich opened this issue Jun 14, 2022 · 7 comments
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@xinglunju
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7m Delivered Done but needs second opinion EB Execution Block uvcontsub_problem Cube has problems with UV continuum subtraction and may need image-domain subtraction

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@keflavich
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keflavich commented Jun 14, 2022 •
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Sgr_A_st_b_updated_03_7M
uid://A001/X15b4/X37

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@keflavich keflavich added 7m EB Execution Block labels Jun 14, 2022
@xinglunju xinglunju self-assigned this Sep 7, 2022
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xinglunju commented Sep 14, 2022 •
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Calibration

Looks good overall.

  • In step 12 hifa_bandpassflag, in one EB uid___A002_Xfabf9b_X1d63.ms, there is one scan that is flagged for spws 16/18/24/26 for the bandpass calibrator, but is not flagged for spw20/22.
    image

As a result, in step 19 hif_applycal, the bandpass calibrator of this EB shows a glitch in the phase/amp vs time plots. However this should not affect the bandpass calibration a lot, which considers a different dimension (phase/amp vs. freq).
image

Continuum imaging

Continuum identification (hif_findcont) is questionable, and can be improved a lot. This is part of Sgr B2, so there are lots of lines.
The continuum image looks ok, but may need careful masking and/or selfcal.
image

Line imaging

  • spw 16/18/20/24/26: low QA scores; significant residual emission in 'line-free' mom maps. Spw16 as an example is shown below. All these spws need to be re-imaged after a better continuum identification.
    image
    image

  • The only spw that got a high QA score, spw22 (for HNCO), shows a long emission feature. Is this a real feature?
    image

Hipergator pipeline run -- line imaging

Only spws 16/18/22 show up in the weblog (with low QA scores). There are errors for other spws.
And the other spws do not exist in globus. @keflavich could you take a look?

@xinglunju xinglunju added the Reclean Needs to be or has been recleaned label Sep 14, 2022
@keflavich keflavich mentioned this issue Oct 5, 2022
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Note to myself: this one needs a better cont.dat which cannot be done with editing the json script. I will try something on a local machine.

@xinglunju xinglunju added Done! and removed Reclean Needs to be or has been recleaned labels Dec 6, 2022
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As one of the SgrB2 fileds, this one can really be improved by a careful inspection of cont.dat, but I guess this is beyond the point of weblog reviews. So I will tentatively mark this one as 'done'.

@xinglunju xinglunju mentioned this issue Dec 8, 2022
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@eacmills eacmills mentioned this issue Mar 23, 2023
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@pyhsiehATalma
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@keflavich @xinglunju

I couldn't find line cube of spw24 under /working. it looks like tclean stop at some point?

@pyhsiehATalma pyhsiehATalma mentioned this issue Jun 21, 2023
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@pyhsiehATalma The cube of spw24 is available under /working now.

The cube looks fine overall.

However, toward the upper left corner, the bright source Sgr B2(M) has some continuum baseline issue, which is not surprising... I guess we can do a baseline subtraction in the image domain.
image

@xinglunju xinglunju mentioned this issue Jun 28, 2023
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@xinglunju xinglunju added the uvcontsub_problem Cube has problems with UV continuum subtraction and may need image-domain subtraction label Jun 28, 2023
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@xinglunju thanks for the manual imaging of spw24. I downloaded the cube. Here is just one thing minor, the cube has multiple synthesize beam information per channel, could you please run imsmooth with kernal='common' and upload the cube again? I have done it locally for the purpose of mosaic. I think feather will fail with multiple synthesize beam cube.

imsmooth( imagename='uid___A001_X15b4_X37.s38_0.Sgr_A_star_sci.spw24.cube.I.iter1.image.pbcor',kernel='common',outfile='uid___A001_X15b4_X37.s38_0.Sgr_A_star_sci.spw24.cube.I.iter1.image.pbcor.common')
~
~
~

@xinglunju
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@pyhsiehATalma I didn't manually image the SPW24 cube... It is from the pipeline on hipergator. Nonetheless I uploaded the common-beam cube to /upload/Sgr_A_st_b_updated_03_7M_reclean/
Let me know if you need smoothed cubes for other SBs!

@pyhsiehATalma pyhsiehATalma mentioned this issue Jan 19, 2024
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