The purpose of this workshop is to provide an introduction to ALMA and to provide tutorials on working with data from the telescope.  This workshop will be conducted by UK ALMA Regional Centre (ARC) Node staff as a series of half-day sessions, with staff available at the end of each day's session to help with additional questions.  By request, we will focus on basic ALMA data calibration and imaging, but we will also provide tutorial sessions on proposal preparation, ALMA simulations, the ALMA archive, and advanced imaging techniques.  We will also provide information about ALMA's capabilities in Cycle 9 when that information is available.  Although the workshop is aimed at UK researchers, participants from other countries are welcome to join.



(All times are given in GMT.)

Monday, 21 February

10:00 Welcome and Introductions
10:30 Introduction to ALMA
11:00 Introduction to Interferometry
11:30 Introduction to the Observing Support Tool (the online ALMA simulation tool)
12:00 Break
12:30 Introduction to the Observing Tool (the GUI used for preparing observing proposals)
ScientificJustification.pdf (required for hands-on)
13:30 After Proposal Submission
14:00 Optional Science Presentations
15:00 End


Tuesday, 22 February

10:00 Introduction to CASA
Material (required for hands-on)
10:45 Introduction to the ALMA Archive
12:00 Break
12:30 Examining Downloaded Data
Notes about Downloaded Data
Introduction to the viewers
Files for hands-on activities with the image viewers
14:00 End


Wednesday, 23 February

10:00 Examining Downloaded Data (continued)
Reviewing the WebLog
11:30 Science Presentation
12:00 Break
12:30 Imaging Tutorial (strongly recommended to read it in advance)
scriptForImagingZCMa.py (required for the Tutorial)
Imaging (slides to follow the Tutorial)
14:00 End


Thursday, 24 February

10:00 Imaging Tutorial (continued)
Synthesis Imaging
11:30 Science Presentation
12:00 Break
12:30 Imaging Tutorial (continued)
How parameter selection affects my image?
scriptForImagingZCMa_extra.py (optional)
14:00 End


Friday, 25 February

10:00 Optional Assistance with 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 6.2.1 (ALMA Pipeline Version)

To work on the data calibration, imaging, and analysis activities, participants will need access to a computer running CASA version 6.2.1 (ALMA Pipeline Version).  This software is available for both Linux and Mac but unfortunately not for Windows.

Download Link


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.

Download Link



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.

Download Link


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)

Raw Visibility Data


Replacement scriptForPI.py (needed to pipeline-calibrated the example dataset in CASA 6.2.1)

Calibrated Visibility Data (optional)

Science Only Visibility Data (optional)