VLA archive file 22B-193.sb43005044.eb45211181.60336.61774487268

[xinglunju]

SB 43005044 JACKS region 18

• [x] Observations completed
• [x] VLA CASA Calibration pipeline run by observatory
• [x] Weblog downloaded and unpacked
• [ ] Raw data downloaded (specify where)
  • [ ] local machine
  • [ ] Globus
• [ ] Pipeline calibration assessment
• [ ] Calibrated MS generated
  • [ ] Uploaded to Globus
• [ ] Imaging: Continuum
• [ ] Imaging: Lines
  • [ ] NH3 (1,1)
  • [ ] NH3 (2,2)
  • [ ] NH3 (3,3)
  • [ ] NH3 (4,4)
  • [ ] NH3 (5,5)
  • [ ] H2O
  • [ ] H64
  • [ ] H66
  • [ ] NH3 (2,1)
  • [ ] NH3 (3,2)
  • [ ] NH3 (4,3)
  • [ ] NH3 (5,4)
  • [ ] NH3 (6,5)

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[xinglunju]

Log Name: 2024-01-27_1449_22B-193 Project: 22B-193 SBID(s): 43005044 EBID(s): 45211181 Observing Date: 27-Jan-2024 Observation Type: Science Bands Used: X K No. of Subarrays: 1 Observer(PI): Prof Elisabeth Mills Source File(s): 22B-193_sb43005044_1_1 Operator(s): Jesse Petrone Array Configuration: C Decommissioned Antenna: 28

Adobe PDF version of this log is located at: http://www.vla.nrao.edu/operators/logs/

WEATHER INFORMATION

Time(UTC) Dew Pt Temp Wind Bar Press API RMS Phase(degs) 27Jan 15:04:16 -5.4 -6.2 W at 1.0 m/s 795.8 2.2 27Jan 17:13:54 -1.3 -2.2 W at 1.2 m/s 796.6 2.7 27Jan 18:37:54 -2.2 2.3 NW at 1.5 m/s 796.1 6.7

Operator comments for the above weather entries

27Jan 15:04:16 Sky cover 40%. Stratiform clouds. Fog. 27Jan 17:13:54 Sky cover 20%. Stratiform clouds. Fog. 27Jan 18:37:54 Sky clear.

COMMENTS AND OUTAGES

Outage information format: Start Time, End Time, Category, Form#, # Antennas, Down Time(minutes) Antenna ID(s) and Data Effect Description

Number of Antennas Used: 27

27Jan 14:49:31 Starting project 22B-193.

27Jan 14:49:31 The band(s) used is(are): X K.

27Jan 14:52:19 On source 3C286 with all available antennas.

27Jan 14:49:31 Antenna(s):1,6,7,8,10,11,13,15,17,18,19,21,24,25,26,27 have recently updated baseline parameters to correct for errors resulting from their recent relocation. Please check for any significant errors and submit them to the NRAO Helpdesk (https://science.nrao.edu/observing/helpdesk) under the VLA Observing department.

27Jan 14:49:31 To access your data from the NRAO archive visit: https://science.nrao.edu/facilities/vla/archive All VLA science data are processed through the VLA calibration pipeline. Details are at: https://science.nrao.edu/facilities/vla/data-processing/pipeline For further questions please use the NRAO Helpdesk at: https://science.nrao.edu/observing/helpdesk Adobe PDF version of this log is located at: http://www.vla.nrao.edu/operators/logs/

27Jan 14:49:31 Note: To support our ongoing RFI monitoring efforts, any feedback from your program on RFI can be sent to: nrao-rfi@nrao.edu The key information to provide is:

• Observation/project code
• Frequency and Time of the observations
• The characteristics of the RFI signal, in particular if it is continuous or intermittent?
• If possible, a spectrum of the RFI should be included in the e-mail. Thanks very much for your support; this information will be continuously updated on the EVLA science pages at: https://science.nrao.edu/facilities/vla/docs/manuals/obsguide/modes/rfi/

Project End Time Total Time % Down Time Total Down Time (minutes x 27 ants) (minutes)

27-Jan-2024 18:18:56 5654.3 0.0% 0.0

[xinglunju]

Issues noted but not flagged by staff in pipeline run

• There is gain compression evident in the observation.
• Antenna ea09, ea18, and ea25 have hardware issues.
• The low points in the bandpass and complex gain calibrator UVwave plots are from ea15, spw 10.
• Baseline ea25&ea26, spw 9 is also causing some low amplitude points in the complex gain calibrator's UVwave plot.

[kelizabeth7]

Flagging Summary

• ea02 is only antenna flagged in the flagging summary for most of the fields

Task Summary

• 12. Flux density bootstrapping and spectral index fitting has a QA score of 0.87 (Max rms of the residuals is 0.004850705670055963)

Stage 13 Plots

Bp Initial Phase Gain Plots

• ea09 has hardware issues (not flagged by staff) and this is the reference antenna (which should be changed):

Final Amp Time Cal Plots

• ea09, ea18, and ea25 (all have hardware issues) have diverging behavior in their final amp time cal plots (this is also seen in the final amp freq cal plots for the same antennae):

• ea12 has some slight divergence in points near the end of the time

Stage 17 Plots

• some scattered points in the calibrated phase vs time plot:

• Most CMZ fields have a max amp of 0.03 to 0.06. How much does this spread in amp matter from field to field?

• Field 3 and Field 7 have a max amp of 1.0: