Execution Block ID uid://A001/X15a0/X142 Sgr_A_st_ab_03_TM1

[keflavich]

Sgr_A_st_ab_03_TM1
uid://A001/X15a0/X142

• Observations completed?

• Delivered?

• Downloaded? (specify where)

  • hipergator
  • hipergator pipeline run
    • Pipeline Run 20220620T040157
    • Pipeline Run 20220619T040339
    • Pipeline Run 20220619T052258

• Weblog unpacked

• Weblog Quality Assessment?

• Extra Weblog Sgr_A_st_ab_03_TM1_0 -> pipeline-20220620T040157, Extra Weblog Sgr_A_st_ab_03_TM1_1 -> pipeline-20220530T124105

• Imaging: Continuum

• Imaging: Lines

  • SPW25 H13CN
  • SPW27 H13CO+/SiO
  • SPW29 HCO+
  • SPW31 HNCO
  • SPW33 Cont 1
  • SPW35 Cont 2

Product Links:

• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw25.cube.I.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw27.cube.I.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw29.cube.I.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw35.cube.I.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw31.cube.I.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw33.mfs.I.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw25.mfs.I.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw35.mfs.I.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw31.mfs.I.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw29.mfs.I.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw27.mfs.I.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw25_27_29_31_33_35.cont.I.alpha.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw25_27_29_31_33_35.cont.I.tt0.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw25_27_29_31_33_35.cont.I.pb.tt0.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw25_27_29_31_33_35.cont.I.tt1.pbcor.fits
• member.uid___A001_X15a0_X142.Sgr_A_star_sci.spw25_27_29_31_33_35.cont.I.alpha.error.fits

Reprocessed Product Links:

• uid___A001_X15a0_X142.s36_0.Sgr_A_star_sci.spw25_27.cont.I.iter1.image.tt0.pbcor.fits
• uid___A001_X15a0_X142.s8_0.Sgr_A_star_sci.spw33.mfs.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s8_0.Sgr_A_star_sci.spw27.mfs.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s8_0.Sgr_A_star_sci.spw25.mfs.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s8_0.Sgr_A_star_sci.spw35.mfs.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s8_0.Sgr_A_star_sci.spw31.mfs.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s8_0.Sgr_A_star_sci.spw29.mfs.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s38_0.Sgr_A_star_sci.spw25.cube.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s36_0.Sgr_A_star_sci.spw33_35.cont.I.iter1.image.tt0.pbcor.fits
• uid___A001_X15a0_X142.s38_0.Sgr_A_star_sci.spw35.cube.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s38_0.Sgr_A_star_sci.spw33.cube.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s38_0.Sgr_A_star_sci.spw27.cube.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s38_0.Sgr_A_star_sci.spw29.cube.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s38_0.Sgr_A_star_sci.spw31.cube.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s36_0.Sgr_A_star_sci.spw25_27_29_31_33_35.cont.I.iter1.image.tt0.pbcor.fits
• uid___A001_X15a0_X142.s38_0.Sgr_A_star_sci.spw35.cube.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s38_0.Sgr_A_star_sci.spw31.cube.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s38_0.Sgr_A_star_sci.spw33.cube.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s38_0.Sgr_A_star_sci.spw29.cube.I.iter1.image.pbcor.fits
• uid___A001_X15a0_X142.s38_0.Sgr_A_star_sci.spw27.cube.I.iter1.image.pbcor.fits

[keflavich]

ALMA has delivered corrupted data:

$ ls -lhrt *X142*
-rw-r--r-- 1 adamginsburg adamginsburg 3.5K Jun 11 16:57 member.uid___A001_X15a0_X142.README.txt
-rw-r--r-- 1 adamginsburg adamginsburg 149G Jun 11 20:02 2021.1.00172.L_uid___A001_X15a0_X142_001_of_001.tar
-rw-r--r-- 1 adamginsburg adamginsburg 1.2G Jun 11 20:03 2021.1.00172.L_uid___A001_X15a0_X142_auxiliary.tar
$ md5sum *X142*
2fb9d60129945bd451c1c1ab54c282b1  2021.1.00172.L_uid___A001_X15a0_X142_001_of_001.tar
9fa9788768713369687a8cff0117ec24  2021.1.00172.L_uid___A001_X15a0_X142_auxiliary.tar
45243dd5a6a80b5da300bb9d2ff21537  member.uid___A001_X15a0_X142.README.txt
$ tar tvf 2021.1.00172.L_uid___A001_X15a0_X142_001_of_001.tar
$ tar tvf 2021.1.00172.L_uid___A001_X15a0_X142_auxiliary.tar

[xinglunju]

Calibration

• Two EBs in this data. Spectral features in the phase calibrator J1744 have been properly flagged.
• step 16. hifa_gfluxscale: the two EBs were executed 4 days apart, but the derived flux of J1744 is different by ~6% (454 mJy vs. 428 mJy). Could this be a problem? Also, the age of the catalog flux for J1744 is more than 190 days old. Shouldn't JAO update their catalog more often than this?

Continuum imaging

• step 31. hif_findcont: continuum identification of spw 29, too close to a line?
  
  As a result, in 34. hif_makeimages (mfs), the continuum image of spw 29 shows many diffuse features.
  

• The aggregate continuum image looks good. But still, a more careful cont id for spw 29 is needed.

Line imaging

• spw 33 is size-mitigated, and the reprocessing has successfully imaged this spw. The image looks great, no divergence is found: left - mom0, right - mom8
  

• Beam sizes too large: for spw 25/27/29/31, the beam sizes are 2" x 1.7" or larger. This is almost 30% larger than the requested beam. Do we need to reclean with smaller robust numbers? (currently, robust=0.5)

• Point sources in spw25, likely SiO v=1 masers. Otherwise, images look good.

[xinglunju]

Remaining issues

• Minor calibration issues: phase vs time scatter in one of the phase calibration scans of one of the two EBs. Likely due to the antenna DA42 (see the diagnostic plots in stage 17). I have noted this one in Tracking of potential calibration problems #178 .
  See the blue marks in the screenshot below, which comes from https://data.rc.ufl.edu/secure/adamginsburg/ACES/weblogs/humanreadable/Sgr_A_st_ab_03_TM1/html/t2-4m.html?sidebar=sidebar_stage19&ms=all&subpage=t2-4m_details.html#calphasevstime

• How should we adjust the findcont result before re-running the imaging? Is there any guidline? (@keflavich @ashleythomasbarnes @d-l-walker et al. help needed...)

[d-l-walker]

Hi @xinglunju -- I think that SPW 29 looks ... reasonable. It's not ideal, but it's tricky to avoid contamination with this SPW due to the widespread line emission. But yeah, we could definitely improve it. If you want to proceed with re-running the imaging, I have done the following to achieve this:

• Download the relevant .ms files and the cont.dat file from globus
• Edit the the cont.dat file to refine the frequency selection where needed
• Make a copy of the imaging_pipeline_rerun.py script
• Comment out lines as needed to run only the steps required. Make sure to adjust the parameters within each stage if applicable.
• Run the script in pipeline mode. It should pick up the cont.dat file automatically.

This takes out most of the manual effort since you're just letting the pipeline steps run. Alternatively you could do this manually using uvcontsub and tclean, but that would be more hands-on.

[xinglunju]

We have decided to ignore the baseline/cont.dat issues for spw29 (HCO+). I mark this one as 'done'.

[ksi85]

QA - Line contamination in continuum images from high/low frequencies

Summary: looks ok to me

Files checked:

New: spw25_27 and spw33_35
Old: spw25_27_29_31_33_35 and oldhigh_spw33_35
Results:
New continuum images look good

Attached image:

Top-left: spw25_27_29_31_33_35
Top-right: spw25_27
Bottom-left: oldhigh_spw33_35
Bottom-right: spw33_35

[ksi85]

QA - Line contamination in continuum images from high/low frequencies
version 2 (Apr2024)

Summary: looks ok to me

Files checked:

New: spw25_27 and spw33_35
Old: spw25_27_29_31_33_35 and oldhigh_spw33_35
Results:
New continuum images look good

Attached image:

Top-left: spw25_27_29_31_33_35
Top-right: spw25_27
Bottom-left: oldhigh_spw33_35
Bottom-right: spw33_35