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11. Discovery of Brown Dwarfs mining the 2MASS and SDSS databases
ID:
ivo://edu.euro-vo.org/extern/asterics_browndwarfs
Title:
Discovery of Brown Dwarfs mining the 2MASS and SDSS databases
Date:
27 Dec 2024 08:31:05
Publisher:
The GAVO DC team
Description:
Brown dwarfs are objects occupying the gap between the least massive stars and the most massive planets. They are intrinsically faint objects so their detection is not straighforward and, in fact, was almost impossible until the advent of global surveys at deep optical and near-infrared bands like SDSS, 2MASS or DENIS among others. We propose here to mine the 2MASS-PSC and SDSS-DR9 databases to identify T-type brown dwarfs through an appropriate combination of colours in the optical and the infra-red, an approach that perfectly fits into the Virtual Observatory.
12. Explore the Pleiades with TOPCAT and Aladin
ID:
ivo://edu.gavo.org/hd/plejades
Title:
Explore the Pleiades with TOPCAT and Aladin
Date:
03 Apr 2025 09:45:51
Publisher:
The GAVO DC team
Description:
As stars in open star clusters are formed from the same matter at the same time and have only a small velocity dispersion, it is relatively easy to identify them from the background stars. In this tutorial, we will identify the members of the Pleiades kinematically and get an idea of our success by examining a color-magnitude diagram using TOPCAT, Aladin, and a few VO services.
13. Exploring Gaia data with TOPCAT and STILTS
ID:
ivo://edu.euro-vo.org/extern/topcatgaia
Title:
Exploring Gaia data with TOPCAT and STILTS
Date:
27 Dec 2024 08:31:00
Publisher:
The GAVO DC team
Description:
This tutorial uses data from Gaia DR2 to lead you through some of the capabilities of TOPCAT and STILTS. Use cases covered include a studies of the globular cluster M4 in proper motion space and the open cluster Hyades in the full phase space, matches between Gaia and HST data, and the creation of Hertzsprung-Russell diagrams.
14. Identifying Brown Dwarf candidates in 2MASS and SDSS
ID:
ivo://edu.gavo.org/hd/brown_dwarfs
Title:
Identifying Brown Dwarf candidates in 2MASS and SDSS
Date:
03 Apr 2025 09:45:51
Publisher:
The GAVO DC team
Description:
This tutorial is a comprehensive scientific usecase in which brown dwarf candidates in 2MASS and SDSS are identyfied. The surveys are queried using ADQL, and unncertainties in the data are solved with TOPCAT and Aladin.
15. Introduction to Simulation Databases - Density Fields and Dark Matter Halos
ID:
ivo://edu.gavo.org/gavo_simulations_teachers
Title:
Introduction to Simulation Databases - Density Fields and Dark Matter Halos
Date:
04 Apr 2025 09:05:08
Publisher:
The GAVO DC team
Description:
This tutorial was created for a physics teacher workshop (~ high school level). It shows how to extract density fields and information on dark matter halos from the CosmoSim database using SQL queries. It is optimized for brevity.
16. Introduction to Simulation Databases Using CosmoSim
ID:
ivo://edu.gavo.org/gavo_simulations
Title:
Introduction to Simulation Databases Using CosmoSim
Date:
04 Apr 2025 09:05:08
Publisher:
The GAVO DC team
Description:
This tutorial shows how to do first SQL-queries on cosmological databases, including retrieving mass functions, extracting merger trees or particles of a specific dark matter halo.
17. Multi-instrument, multi-wavelength study of high energy sources with the Virtual Observatory
ID:
ivo://edu.euro-vo.org/extern/asterics_multiinstrument
Title:
Multi-instrument, multi-wavelength study of high energy sources with the Virtual Observatory
Date:
27 Dec 2024 08:31:04
Publisher:
The GAVO DC team
Description:
This tutorial demonstrates how to use several standard tools of the Virtual Observatory (VO) for data mining and multiple waveband data analysis. The step-by-step application below focuses on towards applications in the gamma-ray and high energy domain, but also involves observational data from other wavebands.
18. Outlier Analysis in Low-Resolution Spectra: DFBS and Beyond
ID:
ivo://edu.gavo.org/hd/arvo_dfbs
Title:
Outlier Analysis in Low-Resolution Spectra: DFBS and Beyond
Date:
27 Dec 2024 08:31:06
Publisher:
The GAVO DC team
Description:
Low-resolution spectra like those resulting from objective prism observations or the RP/BP instrument on board of the Gaia astrometry satellite enable a wealth of interesting science. This use case investigates one use leading up to combining many VO resources: The identification of misclassified objects from reference databases.
19. Plate Scans in the VO
ID:
ivo://edu.gavo.org/hd/gavo_plates
Title:
Plate Scans in the VO
Date:
03 Apr 2025 09:45:51
Publisher:
The GAVO DC team
Description:
This tutorial introduces a few techniques for working with image services in the Virtual Observatory (VO) in general, using services containing plate scans as examples. It will discuss both exploratory, interactive use, and scripting using pyVO.
20. RAVE Radial Velocities with TOPCAT and Aladin
ID:
ivo://edu.gavo.org/gavo_raves
Title:
RAVE Radial Velocities with TOPCAT and Aladin
Date:
04 Apr 2025 09:05:08
Publisher:
The GAVO DC team
Description:
Create an all-sky map of RAVE stars using TOPCAT or Aladin. Also shows how to draw proper motion vectors with TOPCAT.

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