Overview
A new class of astronomy postgraduate students will be starting their studies this autumn, and many students will be working with ALMA data. The purpose of this workshop is to help new students get started with their ALMA research.
The workshop will be conducted by staff from the UK ALMA Regional Centre (ARC) Node. Because of the ongoing issues with COVID-19, the workshop will be conducted virtually using Zoom.
The workshop will be scheduled as a series of half-day sessions running an entire week and will cover the following topics:
- An introduction to ALMA
- An introduction to radio interferometry
- An overview on using the ALMA Archive
- Calibrating and inspecting data from the ALMA archive
- Imaging ALMA data
- Data analysis
At the end of the workshop, UK ARC Node staff will be available to help with any questions related to participants' specific research.
Schedule
Monday, 9 November
| 10:00 | Welcome and Introductions |
| 10:45 | Introduction to ALMA |
| 11:15 | Introduction to Interferometry |
| 12:00 | Break |
| 12:30 | Introduction to the Observing Support Tool (the online ALMA simulation tool) |
| 13:00 | Introduction to the Observing Tool (the GUI used for preparing observing proposals) |
| 14:00 | End |
Tuesday, 10 November
| 10:00 | Introduction to CASA |
| 10:45 | Introduction to the ALMA Archive |
| 11:30 | Science Talk (Adam Avison) |
| 12:00 | Break |
| 12:30 | Examining Downloaded Data (including an introduction to using ALMA's image viewers) |
| Notes about Downloaded ALMA Data Image Viewer Slides |
|
| 14:00 | End |
Wednesday, 11 November
| 10:00 | Examining Downloaded Data (continued) |
| Reviewing the WebLog | |
| 11:30 | Science Talk (Anita Richards) |
| 12:00 | Break |
| 12:30 | Imaging |
| scriptForImagingZCma.py | |
| 14:00 | End |
Thursday, 12 November
| 10:00 | Imaging (continued) |
| 11:30 | Science Talk (George Bendo) |
| 12:00 | Break |
| 12:30 | Imaging (continued) |
| 14:00 | End |
Friday, 13 November
| 10:00 | Astroquery Demonstration |
| astroqueryExample1.py | |
| astroqueryExample2.py | |
| astroqueryInput.csv | |
| 10:45 | Optional Assistance withn Imaging |
Pre-Workshop Downloads
UK ARC Node staff are available to help with the installation of CASA and any other software needed for the workshop. We will be contacting participants before the workshop to set up Zoom calls to help with the software installation.
CASA 5.6.1
To work on the data calibration, imaging, and analysis activities, participants will need access to a computer running CASA version 5.6.1. (Although newer versions of CASA are available, they cannot be used to pipeline-calibrate ALMA data.) This software is available for both Linux and Mac but unfortunately not for Windows.
ALMA Observing Tool (OT)
One of the workshop sessions is based on using the ALMA Observing Tool, which is used to submit proposals but which is also useful for understanding how ALMA observations are configured. This can be installed on either Windows, Mac, or Linux computers.
CARTA
CARTA is a new image viewer that will eventually replace the current image viewer in CASA. It operates very smoothly, but because it is still under development, it is missing some functions.
Example Datasets
While the workshop will be guiding people through downloading ALMA archive data, calibrating those data, and then imaging those data, participants may want to download data for the workshop early either because of concerns about slow download speeds or because of potential technical issues with creating some of the datasets. These data can be downloaded from the links below.
Note that the total amount of disk space needed to do all of the data processing is about 70 GB. The calibrated and science only visibility data are optional downloads and are only necessary for situations where it is not possible to calibrate the archival data or perform some of the steps in the imaging script.
Archival Data
Product Files (archival images)
Auxiliary Files (calibration information, logs, quality assessment reports, and scripts)