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I-TRAIN

 I-TRAIN with the European ARC Network

The European ARC Network organizes I-TRAIN, a regular series of Interactive Training in Reduction and Analysis of INterferometric data.
The sessions cover a wide range of topics of interest to the ALMA user community with the aim to help users gain expertise in working
with interferometric data. The duration of each training session is about one hour, including a live demo and interactive Q&A. 

Contact us by submitting a ticket to the ALMA HelpDesk (Department "General Queries") if you wish to provide your feedback on I-TRAIN. 

 

Upcoming and current training sessions

Access or subscribe to the calendar of sessions at [calendar URL][iCal address] 

Training session Description

I-TRAIN #17: Introduction to tclean

November 25th, 11:00 CET
[Zoom link]

 

Materials:
- datasets (300 MB)

Tutor: Ashley Bemis

The European ARC Network invites users to an online training on tclean on  November 25th, 11:00 CET (Zoom link).

In this training you will be introduced to tclean using CASA 6.2. A number of tclean subparameters will be introduced in the tutorial, including the different deconvolution options and an overview of the clean method. We will go through specific examples that include continuum imaging and spectral line imaging that implements automasking. Tapering will also be introduced, alongside a review of tclean's various weighting options.
Participants who would like to follow the session are kindly requested to install CASA version 6.2, available under 'Previous CASA Releases' on the CASA download page. Data used for this tutorial will be early-cycle ALMA data already used for ALMAguides, and we will use the continuum-subtracted N2H+ 4-3 data on TW Hya from ALMAGuides available for download here: https://bulk.cv.nrao.edu/almadata/sciver/TWHya/sis14_twhya_calibrated_flagged.ms.contsub.tgz.

The duration of this training session will be about one hour. If you have any doubts or questions, do not hesitate to contact the Allegro ARC node at alma@strw.leidenuniv.nl.

Note: The tutors' presentation will be recorded and an edited version of the recording will be posted in the Science Portal [https://almascience.eso.org/tools/eu-arc-network/i-train] after the session. The interactive Q&A will not be recorded.

 

Past training sessions

Videos of past training sessions are available in our I-TRAIN playlist in YouTube.

Training session Description

I-TRAIN #1: imaging with the ALMA Pipeline
4 December 2020, 11:00 CET


Materials:
- 
training video (YouTube)
- presentation
- script
-
 instructions
- common questions
- tutorial dataset (5 GB download!)

Tutors: Daniel Tafoya, Luke Maud, Emily Moravec, MCarmen Toribio

In this training session participants will learn how to run the ALMA Science Pipeline for their own scientific purposes. They will be guided on how to tweak different parameters of the pipeline tasks to produce cleaned data cubes from publicly available ALMA data. This will allow users to obtain products that are tailored to the specific requirements of their science projects. 

Some preparations are needed to follow this tutorial in full. Attendees are kindly requested to follow these instructions before the session. 

The duration of this training session, hosted by the Nordic ARC node, will be about an hour and will include a live demo and an interactive Q&A session. For questions do not hesitate to contact the Nordic node at contact@nordic-alma.se.

I‚ÄĎTRAIN¬†#2:¬†ALMA¬†Science¬†Archive¬†update¬†and¬†ARI‚ÄĎL
15 December 2020, 11:00 CET

 

Materials:
- ARI-L presentation
- ALMA Science Archive presentation

Tutors: Felix Stoehr, Marcella Massardi

In this training session on the use of ALMA data we present some recently added functionality of the ALMA Science Archive like access to individual files, the CARTA remote visualisation and the new ALMA VO services. An overview over the European ALMA development project ARI-L will follow. ARI-L has already delivered over 74000 science FITS files to the ALMA Science Archive completing the existing ALMA products for Cycles 2-4.

I-TRAIN #3: UVMultiFit
15 January 2021, 11:00 CET

Materials:
- 
training video (YouTube)
- presentation
- dataset and scripts (~2Gb download)
- instructions
- Q&A session

 Tutor: Sébastien Muller

 

The tool UVMultiFit is a versatile library for fitting models directly to visibility data. Visibility fitting can be a powerful method to analyze interferometric data and extract source information without the need to process image deconvolution. During the third session you will learn how to use this tool on real, publicly available ALMA data. 

Some preparations are needed to follow this tutorial in full. Attendees are kindly requested to fulfil the Requirements in these instructions before the session. 

The duration of this training session, hosted by the Nordic ARC node, was about an hour and will include a live demo and an interactive Q&A session. For questions do not hesitate to contact the Nordic node at contact@nordic-alma.se.

I-TRAIN #4: ALMA WebLog  inspection
19 February 2021, 11:00 CET


Materials:
- instructions
- WebLog example
-
 presentation
-
 YouTube video

 Tutor: George Bendo

This I-TRAIN session serves as a tutorial on the inspection of ALMA WebLogs. WebLogs are produced by the ALMA pipeline and contain diagnostic information on data calibration and imaging.  This session will teach users how to interpret the WebLog information and how to use it to guide re-imaging ALMA data.

Before the session, attendees are kindly requested to follow these instructions. Attendees should either download this WebLog example or prepare to use their own WebLogs from their own projects. Presentation slides are available. 

The duration of this training session, hosted by the UK ARC node, was about one hour and will include a live demo and an interactive Q&A session. For questions do not hesitate to contact the UK ARC node at alma-contact@jb.man.ac.uk (with subject WebLog I-TRAIN).

I‚ÄĎTRAIN¬†#5:¬†Simulating ALMA Observations with the OST
11 March 2021, 11:00 CET

 

Materials:
- http://almaost.jb.man.ac.uk/
- presentation slides 
- YouTube video

Tutor: Adam Avison

The European ARC Network offered an online training on simulating observations with the ALMA Observation Support Tool (OST).  The OST allows users to test the effect of differing array configurations, frequency tunings, pointing strategies and weather conditions on imaging (2D or 3D) a sky-model of their choosing. The output images can be used to support the scientific and technical justifications of their ALMA proposals or for comparing model data to existing ALMA observations. In this training session participants will learn how to work with the OST to ensure robust and meaningful ALMA simulations.

No specific preparations is needed to follow this tutorial in full, the OST is available online at http://almaost.jb.man.ac.uk/. If one wishes to simulate a sky-model of their favourite target these should be prepared in FITS format following the help documentation here (http://almaost.jb.man.ac.uk/help/#fitsinfo). 

The duration of this training session, hosted by the UK ARC node, is about one hour and includes a live demo and an interactive Q&A session. For questions do not hesitate to contact the UK ARC node at alma-contact@jb.man.ac.uk (with subject OST I-TRAIN). 

 

I‚ÄĎTRAIN¬†#6:¬†Improving image fidelity through self-calibration
25 May 2021, 11:00 CEST 

 

Materials:
-
 training video (YouTube)
-
 presentation Self-Calibration Basic
- presentation Self-Calibration Advanced
- Q&A session
- instructions
- dataset and script (1.8 Gb download!)

Tutors: Emily Moravec, Anita Richards, Andrés Pérez-Sánchez, MCarmen Toribio

In this session you will learn how to self-calibrate your interferometric images to improve their image fidelity. In particular, you will learn criteria to decide whether to self-calibrate, how to choose parameter values - and when to stop - and thus, how to improve the image dynamic range and bring faint details out of the noise.

Before the session, attendees will be requested to do some preparations in order to be able to follow this tutorial in full. The preparations will consist of downloading a dataset and installing a compatible CASA version and instructions on how to do so will be made available on the Science Portal at least a week in advance. Presentation slides will be made available in the Science Portal the day before the session. 

The duration of this training session will be about two hours and will include a live demo and an interactive Q&A. The first hour will be an interactive tutorial and demonstration. The second hour will be devoted to Q&A, advanced techniques and special cases. For questions do not hesitate to contact us at contact@nordic-alma.se.

 

I-TRAIN #7: Polarization observations with ALMA
24 June 2021, 11:00 CEST

 

Materials:
- training video (YouTube)
- presentation
- hands-on

Tutors: Rosita Paladino, Tobia Carozzi, Katharina Immer, MCarmen Toribio

The European ARC Network offered an online training on polarization observations with ALMA, which was held on Thursday June 24, 2021, 11:00 CEST. In this training session, participants can learn about ALMA’s polarization capabilities and data products available in the archive. In particular instructions on how to inspect the diagnostic information on data calibration and how to produce polarization images are given.

The duration of this training session is about one hour and included an interactive Q&A session. For questions do not hesitate to contact the Nordic ARC node at contact@nordic-alma.se.

Note: The tutors' presentation will be recorded and an edited version of the recording will be posted in the Science Portal after the session. The interactive Q&A has not been recorded.

 

I-TRAIN #8:  Exploring the ALMA Science Archive with ALminer
30 September 2021, 11:00 CEST

Materials:
- training video (YouTube)
- notebook
- presentation slides
- Q&A session

Tutor: Aida Ahmadi

ALminer - ALMA Archive Mining & Visualization Toolkit (Ahmadi & Hacar, 2021) is a Python-based code to effectively query, analyse, and visualise the ALMA science archive. It also allows users to directly download ALMA data products and/or raw data for further image processing. This tutorial will consist of a live demo of this tool. For the presentation material and to follow along with the demo, follow the instructions here (https://github.com/emerge-erc/ALminer/tree/main/notebooks/I-TRAIN). Furthermore, an extensive tutorial where all ALminer features have been highlighted can be found here (https://alminer.readthedocs.io/en/latest/index.html#getting-started)

More details on ALminer, including installation instructions can be found at https://alminer.readthedocs.io. 

The duration of this training session will be about one hour and will include an interactive Q&A session. For questions do not hesitate to contact Allegro at alma@strw.leidenuniv.nl.

Note: The tutors' presentation will be recorded and an edited version of the recording will be posted in the Science Portal after the session. The interactive Q&A will not be recorded.

I-TRAIN #9:  Stacking spectra in the image domain with LineStacker
15 October 2021, 11:00 CEST

 

Materials:
- training video (YouTube)

Tutor: Jean Baptiste Jolly

Line-Stacker (Jolly et al. 2020) is a new tool for stacking of spectral lines that can stack both 3D cubes or already extracted spectra. Additional tools are included to help further analyse stacked spectra and stacked sample. This tutorial will consist of a live demo of this tool. To follow along with the live demo, make sure you install the latest version of the package and a CASA version <5.0 according to instructions. If you would like to request remote computing access, please contact the Nordic ARC at contact@nordic-alma.se.

The duration of this training session will be about one hour and will include an interactive Q&A session. For questions do not hesitate to contact the Nordic ARC node at contact@nordic-alma.se

Note: The tutors' presentation will be recorded and an edited version of the recording will be posted in the Science Portal after the session. The interactive Q&A will not be recorded.

 

I-TRAIN #10: Solar observations with ALMA
19 November 2021, 11:00 CET

 

Materials:
- training video (YouTube)
- Tutorial Dataset  (size: 20 Gb)

Tutor: Miroslav Bárta

In this tutorial you learn a specific procedures for calibration & imaging of solar ALMA data downloaded from the ALMA Science Archive. Attendees are kindly requested to download the training dataset and have CASA 5.6 installed (in case this CASA version is not available for attendees, alternatively they will be able to follow imaging steps without any issues with CASA 6.4).

The duration of this training session is about one hour and will include an interactive Q&A session. For questions do not hesitate to contact the Czech node at barta@asu.cas.cz.

Note: The tutors' presentation has been recorded and an edited version of the recording will be posted in the Science Portal after the session. The interactive Q&A has not be recorded.

I-TRAIN #11: Statistical continuum determination with STATCONT
10 December 2021, 11:00 CET


Materials
:
- training video (YouTube)


Tutor: √Ālvaro S√°nchez-Monge

In this tutorial you learn about a statistically-based method aimed at determining the continuum level in astronomical sources, in particular in line-rich sources (i.e., sources for which emission and absorption features of spectral lines dominates the observed flux). The software is implemented as a python-based tool that automatically determines the continuum flux level using different statistical methods. In general, STATCONT has been found to be highly accurate with discrepancies <1% in 50% of the test cases and <5% in 90% of the cases. Details on STATCONT can be found in this link. An updated version of the software together with new tests are available. 

The duration of this training session is about one hour and will include an interactive Q&A session. For questions do not hesitate to contact the German node at sanchez@ph1.uni-koeln.de

I-TRAIN #12:  CARTA tutorial
18 February 2022, 11:00 CET                           

 

Materials:
- training video (YouTube)

Tutor: Kuo-Song Wang (ASIAA, Taiwan)
Co-tutor: Felix Stoehr (ESO)

 

CARTA, Cube Analysis and Rendering Tool for Astronomy (https://cartavis.org), is a next generation image visualization and analysis tool designed for ALMA, VLA, and SKA pathfinders.
In this tutorial, we cover three topics which are considered as the common daily usages of CARTA:
 1. Image rendering and matching
 2. Spectral line analysis
 3. Catalog visualization
The v3-beta2 version is used for this tutorial. Please get a copy of CARTA from https://cartavis.org and prepare some image and catalog files that you are interested in/familiar for this tutorial. 

I-TRAIN #13: Writing & Reviewing ALMA Proposals
18 March 2022, 11:00 CET

 

Materials:
- training video (YouTube)
- Presentation

Tutors: Violette Impellizzeri, Andrea Corvillón, MCarmen Toribio, Romana Grossová

 

This training has been organised in view of the ALMA proposal deadline in April 2022, and could serve as a guideline for writing ALMA proposals and in particular anonymous proposals, including some tips and tricks. The training also offers guidelines on reviewing proposals and how to best give feedback.

I-TRAIN #14: Using ALMA archival data - A Primer
20 May 2022, 11:00 CET

 

Materials:
- training video (soon)

- Presentation

Tutors: George Bendo and Kazi Rygl

 

In this tutorial, we present a new ALMA document called Using ALMA archival data - A Primer. This document provides basic introductory information of how to use the ALMA data available through the ALMA Science Archive (ASA), including how to query, extract and scientifically exploit the content of the ASA. The aim is to assist readers with the exploitation of archived ALMA data by providing a concise summary of the data and practical examples that include CASA tasks.
The presentation provides brief summaries of the contents of each chapter in the primer (but will avoid discussing the content of the chapters themselves).¬† The "Using ALMA archival data ‚Äď A Primer" document is accessible form the¬†Cycle 9 Documents page¬†and the¬†Archive Documentation page.

 

I-TRAIN #15: ALMA simulations with CASA
17 June 2022, 11:00 CEST

 

Materials:
- training video

Tutor: Eelco van Kampen

In this training you will learn how to use CASA to produce simulated (mock) ALMA datasets in various formats, and for various array configurations (or combinations thereof). There are three levels at which this can be done: using the CASA tools directly (which requires relatively low-level programming), using CASA tasks (which only require input parameters), or using an online browser-based interface to these tasks which is build and designed by the UK ARC node: the OST. Several example input files and scripts will be used, as well as the online CASAguides examples made available by the CASA team.

The duration of this training session is about one hour. If you have any doubts or questions, do not hesitate to contact the ESO ARC: evkampen@eso.org

I-TRAIN #16: APerture SYNthesis SIMulator
16 September 2022, 11:00 CEST

 

Materials:
- training video (YouTube)

Tutor: Ivan Marti-Vidal

 

In this training you will learn to use the APerture SYNthesis SIMulator (APSYNSIM; Martí-Vidal 2017), which is a simple interactive tool to help visualising and understanding the basics of the Aperture Synthesis technique when applied to astronomical interferometers. The users can load many different interferometers and source models (and also create their own), change the observing parameters (e.g., source coordinates, observing wavelength, antenna location, integration time, etc.), and even deconvolve the interferometric images and corrupt the data with gain errors (amplitude and phase). The program is fully interactive and all the figures are updated in real time.