Pipeline QA summary for this task.
Score Reason
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_00 spw 12: maximum renormalization factor of 1.006 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_00 spw 14: maximum renormalization factor of 1.002 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_00 spw 16: maximum renormalization factor of 1.004 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_00 spw 18: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_01 spw 12: maximum renormalization factor of 1.004 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_01 spw 14: maximum renormalization factor of 1.004 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_01 spw 16: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_01 spw 18: maximum renormalization factor of 1.002 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_02 spw 12: maximum renormalization factor of 1.003 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_02 spw 14: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_02 spw 16: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_02 spw 18: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_03 spw 12: maximum renormalization factor of 1.003 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_03 spw 14: maximum renormalization factor of 1.002 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_03 spw 16: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_03 spw 18: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_08 spw 12: maximum renormalization factor of 1.004 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_08 spw 14: maximum renormalization factor of 1.003 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_08 spw 16: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_08 spw 18: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_09 spw 12: maximum renormalization factor of 1.003 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_09 spw 14: maximum renormalization factor of 1.002 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_09 spw 16: maximum renormalization factor of 1.002 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_09 spw 18: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_10 spw 12: maximum renormalization factor of 1.006 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_10 spw 14: maximum renormalization factor of 1.002 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_10 spw 16: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_10 spw 18: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_11 spw 12: maximum renormalization factor of 1.003 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_11 spw 14: maximum renormalization factor of 1.002 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_11 spw 16: maximum renormalization factor of 1.001 is within threshold of 2.0%
1.00 EB uid___A002_Xeea188_X1f88.ms source Serpens_Main_850_11 spw 18: maximum renormalization factor of 1.001 is within threshold of 2.0%

Contents

ALMA cross-correlations are divided by the auto-correlation as a function of frequency, in the correlator. This has a variety of advantages for operations and calibration, but if there is strong line emission detected in the autocorrelation (i.e. as would be detected in a single dish spectrum), that emission can anomalously decrease the cross-correlation amplitude at those frequencies.

This effect can be mitigated by comparing the autocorrelation spectrum (AC) of the target with the AC of the bandpass, which is generally located away from any such bright contaminating line emission. The ratio of the bandpass AC to the target AC provides a scaling factor as a function of frequency that can be used as a first order correction spectrum. However, atmospheric and instrumental variation (e.g. baseline ripple) need to be fitted and removed, so the spectrum is divided into several segments (marked on the plots as thin dotted vertical lines) for that fitting. The fitted AC ratio is presented here as the 'renorm scale factor' or 'renorm amplitude'.

All targets, spws, and measurement sets with maximum scaling above the observatory determined threshold are colored in the table.

Informative plots are included on this page and collected in a pdf for each spw and source, linked from the table below.

The plot shown on this page is a ReNormSpectra summary plot showing the average scaling spectrum over all scans, and for mosaics, all fields in the mosaic with peak scaling above the threshold. All antennas are plotted as dashed red and blue (for X and Y), and the mean is plotted solid. Vertical grey shaded regions indicate areas of the spectrum that may be affected by atmospheric features.

The pdf next contains RenormDiagnosicCheck plots corresponding to each field and scan. The scaling spectrum is plotted as solid lines for each antenna (again red and blue for XX and YY), and the median as a dashed line (green and black for XX and YY).

The renormalization script has heuristics to detect and correct spikes, dips, and jumps near the segment boundaries (marked with thin vertical dotted lines). Less significant (below the threshold for applying the correction) features may remain.

Features in the scaling spectrum associated with atmospheric features require additional care - ALMA data reduction staff will have evaluated these and minimized them insofar as possible with current heuristics, but PIs should take note of the shape and magnitude of any applied correction when performing line science at frequencies overlapping atmospheric lines.


Table

MS/Source/SPW that trigger the need for renormalization above a threshold of 1.02 highlighted in blue. Renormalization has been applied as detailed in the task inputs.

Please refer to the Pipeline User's Guide (linked to this weblog's Home page) for more details on renormalization and interpretation of the plots.

MS Name Source Name SPW Max Renorm Scale Factor (field id) PDF Link to Diagnostic Plots
uid___A002_Xeea188_X1f88.ms Serpens_Main_850_00 12 1.0059673 (5) PDF
14 1.0017739 (5) PDF
16 1.0039394 (5) PDF
18 1.0013305 (5) PDF
Serpens_Main_850_01 12 1.003652 (6) PDF
14 1.0042669 (6) PDF
16 1.0012478 (6) PDF
18 1.0015458 (6) PDF
Serpens_Main_850_02 12 1.0027794 (4) PDF
14 1.0014223 (4) PDF
16 1.0010625 (4) PDF
18 1.0011789 (4) PDF
Serpens_Main_850_03 12 1.0028929 (7) PDF
14 1.0023318 (7) PDF
16 1.0010125 (7) PDF
18 1.0013731 (7) PDF
Serpens_Main_850_08 12 1.0042314 (8) PDF
14 1.002752 (8) PDF
16 1.001469 (8) PDF
18 1.0013196 (8) PDF
Serpens_Main_850_09 12 1.0033635 (3) PDF
14 1.0018631 (3) PDF
16 1.001593 (3) PDF
18 1.0012304 (3) PDF
Serpens_Main_850_10 12 1.0056527 (9) PDF
14 1.0021588 (9) PDF
16 1.0012734 (9) PDF
18 1.0013086 (9) PDF
Serpens_Main_850_11 12 1.0032493 (10) PDF
14 1.0016315 (10) PDF
16 1.0010199 (10) PDF
18 1.0012854 (10) PDF

Plots

uid___A002_Xeea188_X1f88.ms

Serpens_Main_850_00

Spectral Window 12


Spectral Window 14


Spectral Window 16


Spectral Window 18



Serpens_Main_850_01

Spectral Window 12


Spectral Window 14


Spectral Window 16


Spectral Window 18



Serpens_Main_850_02

Spectral Window 12


Spectral Window 14


Spectral Window 16


Spectral Window 18



Serpens_Main_850_03

Spectral Window 12


Spectral Window 14


Spectral Window 16


Spectral Window 18



Serpens_Main_850_08

Spectral Window 12


Spectral Window 14


Spectral Window 16


Spectral Window 18



Serpens_Main_850_09

Spectral Window 12


Spectral Window 14


Spectral Window 16


Spectral Window 18



Serpens_Main_850_10

Spectral Window 12


Spectral Window 14


Spectral Window 16


Spectral Window 18



Serpens_Main_850_11

Spectral Window 12


Spectral Window 14


Spectral Window 16


Spectral Window 18


vis
uid___A002_Xeea188_X1f88.ms
excludechan
{}
output_dir
 
correctATM
False
spw
 
apply
True
atm_auto_exclude
True
threshold
1.02
Start time
2023-05-05 21:37:28.656
End
2023-05-05 22:06:08.370
Duration
0:28:39.714
Context size
21.5 MiB
Note, WebLog generation is not included in the time.

CASA logs for stage 26