Hello, One of your Scheduling Blocks, <FSID>, observed on YYYY-MM-DD, L S C X U K Ka Q band, ### GB, has been processed through the VLA CASA Calibration Pipeline, which is designed to handle Stokes I continuum data, and has received a QA2 score of 'SCORE'. Some data may need further flagging before imaging: please check your data and the target calibration carefully before using the output from the pipeline for science! The following list includes information about any issues found while checking the quality of your calibrated data. - Issue one - Issues two . . . - Issue n - If your observations used a resolved calibrator source (i.e., has UV limits) but does not have standard model images in CASA, the calibrated data through the pipeline would not be accurate. In such instances, re-calibration using UV limits, or imaging the calibrator first and using the resulting image model, will be needed. - If your science involves spectral lines, you should be aware of the following: 1) The pipeline applies Hanning-smoothing by default, which may make the calibrated data set not optimal for certain spectral-line science. 2) During the calibration process, several edge channels in each sub band get flagged by default because they are noisier. Therefore, breaks in the frequency span get introduced in the pipeline calibrated data, which in turn may make the output not suitable for certain spectral-line science. 3) The pipeline runs an RFI flagging algorithm which should flag strong lines and may remove spectral lines of interest to your science. ___________ Your calibrated dataset is not ready for retrieval. If you would like to have access to it, please create a helpdesk ticket within 15 days of this email under the VLA Pipeline department (https://help.nrao.edu/) and tell us which of these two options you would like: 1) Download the dataset over the internet. You may choose to download the calibrated Measurement Set (MS), just the calibration and flag tables, or weblog (online viewable set of Quality Assurance plots, diagnostic plots, and log files). 2.) Have the dataset written to a hard disk and mailed to your location (at a cost of $125.00USD per 2TB hard disk). If you choose this option, more than one dataset may be written to a hard disk, including non-pipeline products if requested. If you choose to have your data delivered via hard disk, please include the following information, without which, we are unable to process your request: Name Mailing Address Telephone Number Hard disk format: Linux or Mac OS X Specific Dataset(s) you would like. For more information about prices and other hard disk options, please see https://science.nrao.edu/facilities/vla/data-archive/data-shipment After 15 days, only the weblog, calibration and flag tables, and a few other small files are archived for future retrieval. These may be requested any time. ____________ The information above also appears in the file "comments.txt" (basic text file), which will be available (and archived) should you wish to have access to the pipeline products in the future. For more information about the pipeline, including access to the scripts for rerunning the pipeline or modification to suit your particular science goals, please go here: https://science.nrao.edu/facilities/vla/data-processing/pipeline Please remember, after the 15 day period has expired, only the weblog and relevant calibration and flag tables (not the calibrated MS) will be archived for your retrieval in the future. Please let us know if you have any questions or concerns through the helpdesk (https://help.nrao.edu/).
This default QA2 score is due to the number of spectral windows for which the pipeline finds no calibration. Here, this includes the setup scan/spws and does not impact calibration quality.
The beginning of scans immediately following requantizer gain setup scans may require additional flagging to remove data taken while these requantizer gains were still being set! Please check the data carefully and flag as needed.
The pipeline uses the longest integration time found for the observation: here, s has been used as the short solint for all data calibrated.
More than one field has a scan intent of Bandpass calibrator: a model will be needed for some of these since the pipeline has chosen the first one found for this calibration!
Since 3C84 was used as a delay and bandpass calibrator, uvrange limits may be used.
The spectral indices reported have SNR of 0.0: this may have implications for continuum science on your target. This may require reprocessing to achieve the best continuum science goals. This may or may not be applicable to your science goals.
Since this SB uses multiple observing bands, the pipeline output plots may have limited use. We recommend plotting the calibration tables and calibrated data per observing band for further inspection before using the output from the pipeline for science.
The pipeline has used s for both the short solution interval and the long solution interval during calibration. This may be too long of a time for this observation: leading to possible decorrelation.