I-TRAIN
I-TRAIN with the European ARC Network
The European ARC Network is initiating I-TRAIN, a regular series of Interactive Training in Reduction and Analysis of INterferometric data.
The sessions will 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 will be about one hour, including a live demo and interactive Q&A.
Upcoming and current training sessions
Access or subscribe to the calendar of sessions at [calendar URL][iCal address]
| Training session | Description |
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I-TRAIN #11: Statistical continuum determination with STATCONT 10 December 2021, 11:00 CET Tutor: Álvaro Sánchez-Monge |
In this tutorial you will 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 will be available one week before the tutorial. 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 German node at sanchez@ph1.uni-koeln.de
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Recent training sessions
| Training session | Description |
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I-TRAIN #1: imaging with the ALMA Pipeline Tutors: Daniel Tafoya, Luke Maud, Emily Moravec, MCarmen Toribio |
In this training session participants will learn how to run the ALMA Science Pipeline for The duration of this training session, hosted by the Nordic ARC node, will be about an |
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I‑TRAIN #2: ALMA Science Archive update and ARI‑L
Materials: Tutors: Felix Stoehr, Marcella Massardi |
In this training session on the use of ALMA data we present some recently the CARTA remote visualisation and the new ALMA VO services. |
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I-TRAIN #3: UVMultiFit Tutor: Sébastien Muller
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The tool UVMultiFit is a versatile library for fitting models directly to visibility data. Some preparations are needed to follow this tutorial in full. Attendees are kindly requested The duration of this training session, hosted by the Nordic ARC node, was about an |
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I-TRAIN #4: ALMA WebLog inspection
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). 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. |
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I‑TRAIN #5: Simulating ALMA Observations with the OST
Materials: Tutor: Adam Avison |
The European ARC Network offered an online training on simulating observations with the ALMA Observation Support Tool (OST) on Thursday March 11, 2021, 11:00 CET [Zoom link]. 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). Note: The tutors' presentation has been recorded and an edited version of the recording will be posted here soon. The interactive Q&A has not been recorded. Presentation slides are available. |
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I‑TRAIN #6: Improving image fidelity through self-calibration Materials: - training video (YouTube) 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. 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. |
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I-TRAIN #7: Polarization observations with ALMA 24 June 2021, 11:00 CEST Materials: 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.
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I-TRAIN #8: Exploring the ALMA Science Archive with ALminer 30 September 2021, 11:00 CEST 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. |
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I-TRAIN #9: Stacking spectra in the image domain with LineStacker |
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.
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I-TRAIN #10: Solar observations with ALMA Materials:
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In this tutorial you will 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 will be 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 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. |