VLA Archive file 22B-193_sb43001218_1_1.59908.77125806713

[eacmills]

SB 43001218 JACKS region 5

• [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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[eacmills]

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Log Name: 2022-11-25_1830_22B-193 Project: 22B-193 SBID(s): 43001218 EBID(s):
Observing Date: 25-Nov-2022 Observation Type: Science Bands Used: X K No. Subarrays: 1 Observer(PI): Prof Elisabeth Mills Source File(s): 22B-193_sb43001218_1_1 Operator(s): Deena Mickelson Array Configuration: C Decommissioned Antenna: 20

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) 25Nov 18:32:06 -6.1 2.3 E at 6.8 m/s 793.8 7.9 25Nov 19:12:50 -6.5 2.7 E at 6.0 m/s 793.2 8.7 25Nov 20:00:16 -6.9 3.5 NE at 7.2 m/s 792.4 7.7 25Nov 22:00:07 -8.8 4.4 NE at 6.4 m/s 791.9 4.1

Operator comments for the above weather entries

25Nov 18:32:06 Sky cover 60%. Mixed clouds.
25Nov 19:12:50 Sky cover 50%. Mixed clouds.
25Nov 20:00:16 Sky cover 40%. Mixed clouds.
25Nov 22:00:07 Sky cover 40%. Mixed clouds.

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

25Nov 18:30:36 Starting project 22B-193.

25Nov 18:30:36 The band(s) used is(are): X K.

25Nov 18:31:04 On source 3C286 with all available antennas.

25Nov 18:30:36 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/

25Nov 18:30:36 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/

25Nov 18:30:36 25Nov 22:01:14 SOFTWARE WO-14644 0.25 52.7 Antenna(s) 17 (Data: Corrupted): Antenna 17 IF B has weak fringes for unknown reason. Operator reopened recently closed work order as she believes this (old) issue may not be fully resolved. The issue is believed to be with a station board.

25Nov 19:24:00 25Nov 20:36:00 NOTE: There was a medical emergency on site requiring an ambulance to be called in, so Operator suspects there may have been RFI at times. I will forward this log to our Data Analysts and ask them to make sure we don't need to reschedule the observation.

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

25-Nov-2022 22:01:14 5687.1 0.9% 52.7

[eacmills]

Pipeline issues noted by staff:

• ea19 has a DTS hardware failure affecting A0C0 spws.

• ea12 adn ea25 have periods of time with low gain amplitudes, possibly related to pointing.

• ea28 has one polzn. with low gain amplitude solutions.

• ea09 B0D0 spws have low gain amplitude solutions starting at scan='27'.

• ea21 has low gain amplitude solutions for the complex gain calibrator scans.

• The complex gain calibrator shows some decorrelation, the lowest points are from scan='16,18'.

[namithaissac]

Step 13 - Final amp time cal plots

ea09 & ea28: Seeing some amplitude dips .

ea25: some spiky features. Not sure if it is an issue.

No other issues in the weblog.

[namithaissac]

1. Issue: Missing SPWs in the raw data?

2. Continuum image made using the imaging script (left), compared with the MeerKAT 1.28 GHz continuum map (right).