VLA archive file 22B-193.sb43004841.eb45211507.60337.64330296296

[xinglunju]

SB 43004841
JACKS region 17

• Observations completed
• VLA CASA Calibration pipeline run by observatory
• 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: 2024-01-28_1526_22B-193
Project: 22B-193
SBID(s): 43004841
EBID(s): 45211507
Observing Date: 28-Jan-2024
Observation Type: Science
Bands Used: X K
No. Subarrays: 1
Observer(PI): Prof Elisabeth Mills
Source File(s): 22B-193_sb43004841_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)
28Jan 15:27:57 -6.6 -6.1 NW at 0.6 m/s 796.3 1.8
28Jan 16:01:40 -4.8 -3.7 NW at 1.0 m/s 796.3 2.9
28Jan 18:18:29 -3.8 5.4 W at 0.7 m/s 796.4 6.3
28Jan 19:00:57 -5.2 8.5 W at 0.7 m/s 795.5 5.9

*** Operator comments for the above weather entries ***

28Jan 15:27:57 Sky clear.
28Jan 16:01:40 Sky clear.
28Jan 18:18:29 Sky cover 10%. Stratiform clouds.
28Jan 19:00:57 Sky cover 30%. Stratiform 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

28Jan 15:26:18
Starting project 22B-193.

28Jan 15:26:18
The band(s) used is(are): X K.

30Dec 15:26:18
On source 3C286 with all available antennas.

28Jan 15:26:18
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.

28Jan 15:26:18
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/

28Jan 15:26:18
Note: To support our ongoing RFI monitoring efforts, any feedback from your
program on RFI can be sent to: [email protected]
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/

28Jan 15:26:18 28Jan 18:55:45 SERVO WO-18966 1.00 209.5
Antenna(s) 19 (Data: Lost):
Antenna parked due to elevation faults

28Jan 15:26:18 28Jan 18:55:45 CRYOGENICS WO-20064 0.12 25.3
Antenna(s) 10 (Data: Corrupted):
K-band receiver warm, sensitivity degraded

28Jan 15:26:18 28Jan 18:55:45 FOCUS/ROTATION Other 0.15 31.4
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)

28-Jan-2024 18:55:45 5655.2 4.7% 266.2

[xinglunju]

Issues noted but not flagged by staff in pipeline run:

• There is gain compression evident in the observation.
• Antennas ea09 and ea12 have hardware issues.
• The low amplitude points in the calibrator UVwave plots are from ea15, spw 10.
• Baseline ea26&ea27 spw 9 is causing additional low amplitude points in the complex gain calibrator's UVwave plot.

[kelizabeth7]

Task Step 13:

Most of the phase gain cal plots have negative slopes
phase gain cal plots that are missing data points align with the antennae that were flagged >50% in phase calibrator (ea02, ea07, and ea27):

final amp time cal plots that concerned me (ea09 and ea12):
the data points separate from each other - this is not the case in the other plots

final amp freq cal plot that concerned me (ea09):
there's a larger vertical spread in the data than in the other plots - connection to the spread in the amp time cal plots?

Task Step 17:

summary phase vs time plots that concerned me (ea08):
the data extends up the left side of the plot further than any of the other target plots. the other plots have maximum amplitudes of approximately 0.10 whereas ea08 has a maximum of 0.30

Other Notes

• no antenna 100% flagged in bandpass
• antenna flagged >50% in phase calibrator: ea02, ea07, ea10, ea27
• antenna flagged in source: ea02, ea07, ea27 (not 100%)
• all QA scores by task are 100% except for hfiv_fluxboot: Gain table for flux density bootstrapping at 91%
• beam size of phase calibrator image: 1.84 x 0.698 arc-seconds

[kelizabeth7]

Raw data has been downloaded to local machine.