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Execution Block ID uid://A001/X15a0/X16c Sgr_A_st_ai_03_TM1 #130

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keflavich opened this issue May 12, 2022 · 11 comments
Open
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Execution Block ID uid://A001/X15a0/X16c Sgr_A_st_ai_03_TM1 #130

keflavich opened this issue May 12, 2022 · 11 comments
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@snlongmore @d-l-walker
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Delivered Done! EB Execution Block Needs Reimaging: Missing SPW size mitigation Needs to be reimaged without size mitigation TM1

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@keflavich
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keflavich commented May 12, 2022 •
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Sgr_A_st_ai_03_TM1
uid://A001/X15a0/X16c

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Reprocessed Product Links:
@keflavich keflavich added EB Execution Block TM1 labels May 12, 2022
@snlongmore snlongmore self-assigned this Jun 29, 2022
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snlongmore commented Jun 30, 2022 •
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Summary:

  • Overall, data looks really nice.
  • SPW 33 has been size mitigated so will need to be imaged.
  • SPW 25: warning in the pipeline about not enough line-free channels for continuum subtraction.
  • Evidence of line contamination in MFS images in SPW 29 & 31.
  • Some emission in the residuals of the line cubes, especially SPW 29 & 31, so these could be cleaned deeper. But not enough of an issue to stop this being a straight pass.

@snlongmore
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Continuum image: a few bright compact sources and some extended emission
uid___A001_X15a0_X16c s36_0 Sgr_A_star_sci spw25_27_29_31_33_35 cont I iter1 image tt0 pbcor sky

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Lots of structure in the SPW 29 line emission
uid___A001_X15a0_X16c s38_0 Sgr_A_star_sci spw29 cube I iter1 image pbcor sky

@snlongmore snlongmore added the Needs Reimaging: Missing SPW size mitigation Needs to be reimaged without size mitigation label Jun 30, 2022
@xinglunju
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xinglunju commented Jun 30, 2022 •
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The extended emission on the eastern edge of the continuum image seems to be consistent with one of the VLA/MeerKAT radio continuum filaments (inside the cyan circle):
Screen Shot 2022-06-30 at 2 38 53 PM
The VLA paper is https://ui.adsabs.harvard.edu/abs/2016ApJ...817..171Z/abstract
The same filament is seen in the MeerKAT 1.2 GHz continuum image (Fig. 11 of https://ui.adsabs.harvard.edu/abs/2022ApJ...925..165H/abstract).

A quick comparison between ACES continuum (left) and VLA C-band continuum (right, from https://ui.adsabs.harvard.edu/abs/2019ApJS..244...35L/abstract).
The two point sources and the two extended structures can be seen in the C-band emission.
image

@keflavich
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@snlongmore could you check that the size-unmitigated cubes look good and exist?

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snlongmore commented Nov 2, 2022 •
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Re-imaged SPW33: Clean diverged at channel 599 to 602.

Capture d’écran 2022-11-02 à 11 45 22

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snlongmore commented Nov 2, 2022 •
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Re-imaged SPW33: Imaging artefacts at channel 602 to 605.

Capture d’écran 2022-11-02 à 11 47 12

@d-l-walker d-l-walker self-assigned this Nov 8, 2022
@d-l-walker d-l-walker mentioned this issue Nov 22, 2022
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d-l-walker commented Nov 22, 2022 •
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I recleaned SPW 33 due to the divergence that Steve pointed out. I just increased cyclefactor to 2.0 (added to override_clean_commands.json in #305), which solved the issue. A preview of the peak intensity map is shown below.

@keflavich the output files from tclean have been uploaded to /upload/Sgr_A_st_ai_TM1_reclean/, and the destination is /rawdata/2021.1.00172.L/science_goal.uid___A001_X1590_X30a8/group.uid___A001_X1590_X30a9/member.uid___A001_X15a0_X16c/

As this was the only outstanding issue, I've marked this region as done.

Screenshot 2022-11-22 at 15 14 11

@keflavich
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Now in /orange/adamginsburg/ACES//rawdata/2021.1.00172.L/science_goal.uid___A001_X1590_X30a8/group.uid___A001_X1590_X30a9/member.uid___A001_X15a0_X16c/Sgr_A_st_ai_TM1_reclean/

@d-l-walker d-l-walker mentioned this issue Jan 11, 2023
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@eacmills eacmills mentioned this issue Mar 23, 2023
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@keflavich keflavich mentioned this issue Nov 14, 2023
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@pyhsiehATalma pyhsiehATalma mentioned this issue Jan 31, 2024
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@SpacialTree
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Continuum QA

There is currently no spw33_35 continuum image, so I solely analyzed the spw25_27 image.

New continuum spw25_27:
uid___A001_X15a0_X16c s36_0 Sgr_A_star_sci spw25_27 cont I iter1 image tt0-image-2024-03-01-14-04-03

mfs:
uid___A001_X15a0_X16c s8_0 Sgr_A_star_sci spw27 mfs I iter1 image pbcor fits-image-2024-03-01-14-04-19

old high spw33_35:
uid___A001_X15a0_X16c s36_0 Sgr_A_star_sci oldhigh_spw33_35 cont I iter1 image tt0-image-2024-03-01-14-06-18

old total continuum spw25_29_31_33_35:
uid___A001_X15a0_X16c s36_0 Sgr_A_star_sci spw25_27_29_31_33_35 cont I iter1 image tt0-image-2024-03-01-14-06-23

All continuum images share the same compact sources and the straight filament at the top left. There are also a couple of larger scale continuum sources, one below the straight horizontal filament at the top left, and a second with a spiral arm shape in the bottom right.

However, the new spw25_27 includes much more of the extended structure in the center of the image. This structure is missing from the mfs image, but seems to be present at least in part in the old continuum images. This is most likely line contaminate line emission.

Continuum:
uid___A001_X15a0_X16c s36_0 Sgr_A_star_sci spw25_27 cont I iter1 image tt0-image-2024-03-01-14-14-44
Line:
uid___A001_X15a0_X16c s12_0 Sgr_A_star_sci spw25 cube I iter1 image pbcor fits-image-2024-03-01-14-14-50

Continuum:
uid___A001_X15a0_X16c s36_0 Sgr_A_star_sci spw25_27 cont I iter1 image tt0-image-2024-03-01-14-17-23
Line:
uid___A001_X15a0_X16c s38_0 Sgr_A_star_sci spw27 cube I iter1 image pbcor fits-image-2024-03-01-14-17-28

@SpacialTree
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Continuum QA

Looks fine

Top: left = 33_35, right = 25_27
Bottom: left = old 33_35, right = 25_29_31_33_35

uid___A001_X15a0_X16c s36_0 Sgr_A_star_sci spw33_35 cont I iter1 image tt0-uid___A001_X15a0_X16c s36_0 Sgr_A_star_sci spw25_27 cont I iter1 image tt0-uid___A001_X15a0_X16c s36_0 Sgr_A_star_sci v1high_-2024-04-03-10

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Delivered Done! EB Execution Block Needs Reimaging: Missing SPW size mitigation Needs to be reimaged without size mitigation TM1
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