VLA archive file 22B-193.sb43002797.eb43161600.59937.70224783565

[eacmills]

SB 43002797 JACKS region 9

• [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

[eacmills]

---

Log Name: 2022-12-24_1651_22B-193 Project: 22B-193 SBID(s): 43002797 EBID(s): 43161600 Observing Date: 24-Dec-2022 Observation Type: Science Bands Used: X K No. Subarrays: 1 Observer(PI): Prof Elisabeth Mills Source File(s): 22B-193_sb43002797_1_1 Operator(s): Deena Mickelson Array Configuration: C Decommissioned Antenna: 12

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) 24Dec 16:59:05 -4.8 5.0 E at 0.3 m/s 793.8 2.8 24Dec 18:00:09 -5.5 5.3 NW at 3.0 m/s 793.5 8.1 24Dec 19:04:18 -5.7 6.9 N at 4.7 m/s 793.0 9.0 24Dec 20:00:12 -5.7 7.4 N at 6.2 m/s 792.2 4.1

Operator comments for the above weather entries

24Dec 16:59:05 Sky cover 10%. Stratiform clouds. 24Dec 18:00:09 Sky clear.
24Dec 19:04:18 Sky clear.
24Dec 20:00:12 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

24Dec 16:51:14 Starting project 22B-193.

24Dec 16:51:14 The band(s) used is(are): X K.

24Dec 16:58:54 On source 3C286 with all available antennas.

24Dec 16:51:14 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/

24Dec 16:51:14 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/

24Dec 17:06:12 24Dec 17:10:13 LO-IF WO-15894 0.50 2.0 Antenna(s) 26 (Data: Lost): Antenna 26 L302-1 synthesizer lost M-lock.

24Dec 16:51:14 24Dec 20:20:40 FOCUS/ROTATION Other 0.05 10.5 Antenna(s) 27 (Data: Lost): Frequent subreflector faults or position errors.

24Dec 18:04:04 24Dec 18:18:26 LO-IF WO-15894 0.50 7.2 Antenna(s) 26 (Data: Lost): Antenna 26 L302-1 synthesizer lost M-lock again.

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

24-Dec-2022 20:20:40 5654.7 0.3% 19.7

[eacmills]

Issues noted but not flagged by staff during pipeline run:

• Wind speed exceeds limit for K band during observation
• ea24 - high scattered delays on A0C0
• ea10 - unstable gain amplitudes in time
• phase jumps on several antennas

[qzhang99]

Agree with Betsy's assessment. ea10 amp gain solutions varied from 1 to 0.4, and should be flagged.