VLA archive file 22B-193.sb43010207.eb45331453.60399.397591354165

[xinglunju]

SB 43010207 JACKS region 24

• [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)

    Product Links

[xinglunju]

Log Name: 2024-03-30_0932_22B-193 Project: 22B-193 SBID(s): 43010207 EBID(s): 45331453 Observing Date: 30-Mar-2024 Observation Type: Science Bands Used: X K No. of Subarrays: 1 Observer(PI): Prof Elisabeth Mills Source File(s): 22B-193_sb43010207_1_1 Operator(s): Sam Gilmore Array Configuration: C Decommissioned Antenna: 26

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) 30Mar 09:35:27 -6.3 2.9 SW at 2.2 m/s 783.7 2.3 30Mar 10:00:17 -6.3 2.8 W at 1.2 m/s 783.8 1.8 30Mar 11:00:13 -6.9 3.1 SW at 2.3 m/s 783.8 2.2 30Mar 12:00:15 -7.7 4.2 SW at 3.5 m/s 784.0 3.6 30Mar 13:00:23 -7.6 3.3 NE at 1.4 m/s 784.3 2.0

Operator comments for the above weather entries

30Mar 09:35:27 Sky cover 30%. Stratiform clouds. 30Mar 10:00:17 Sky cover 30%. Stratiform clouds. 30Mar 11:00:13 Sky cover 20%. Stratiform clouds. 30Mar 12:00:15 Sky cover 20%. Stratiform clouds. 3/30/2024 13:00

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

3/30/2024 09:32 Starting project 22B-193.

3/30/2024 09:32 The band(s) used is(are): X K.

3/30/2024 09:35 On source 1331+305 with all available antennas.

3/30/2024 09:32 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://help.nrao.edu/ Adobe PDF version of this log is located at: http://www.vla.nrao.edu/operators/logs/

3/30/2024 09:32 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/

30Mar 09:32:31 30Mar 13:01:57 FOCUS/ROTATION Other 0.03 6.3 Antenna(s) 4 (Data: Lost): Frequent subreflector faults or position errors.

30Mar 09:32:31 30Mar 13:01:57 FOCUS/ROTATION Other 0.04 8.4 Antenna(s) 27 (Data: Lost): Frequent subreflector faults or position errors.

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

30-Mar-2024 13:01:57 5654.7 0.3% 14.7

[xinglunju]

Issues noted but not flagged by staff:

• ea24 has a DTS hardware failure affecting B0D0 spws.
• ea18 has some spread in gain amplitude solutions for A0C0 spws.

[rpcosgrove]

Weblog analysis:

Flagging Summary

• Amplitude and bandpass calibration 3C286: Average flagging fraction is roughly 75~80%. Half of the spws of ea24 have been flagged, resulting in the corresponding phase calibrator and science target data for these spws also being flagged. Should be double-checked when re-running pipeline.
• Phase calibrator J1744: Average flagging fraction is roughly 35~40%. Antennae ea02 and ea27 have significantly higher fractions (~88% and ~50% respectively), leading to additional flagging in the data from these antennae for the science targets.
• Science data: Average flagging fraction is roughly <20%. Outliers common in data from ea02 and ea27, with several having 100% flagging fractions, along with spws 16+ from ea24 as expected. Additional less severe outliers in ea18 for target 24a and ea04 for 24h and 24k.

Task Notes

• [7. hifv_testBPdcals]: BP Amp and BP Phase solutions for ea24 is a mess; all others look fine
• [13. hifv_finalcals]:
  • Final Amp Time Cal plots all very flat
  • Final Amp Freq Cal plots similarly well-behaved
  • Final Phase Gain Cal plots much less flat. Note phase wrapping, which is fine
• [19. hif_makeimages (cals)]: Calibrator images look good
• pbcor image max values from (19.) are consistent with fluxes of calibrators in (4.) and (12.) as expected. pbcor image max for 3C286 is 2.43 [Jy/beam]; for J1744, it is 470 [mJy/beam]