Workshop on observational techniques 2021

5-12 September 2021 at Ondřejov observatory

Students who attend this two-weeks workshop will learn how to preper and performe spectroscopic and photometric observations using instrumentation at the Ondřejov observatory. The focuse will be on spectroscopic and lightcurve observations of eclipsing hot subdwarf stars with cool, low-mass companions in different filters. Those objects are especially interesting as the companion can be a M dwarf or even a substellar companion as a brown dwarf or massive planet.

The students will be teached how to reduce photometric and spectroscopic data. For all observations an analysis of the lightcurve using the lightcurve fit program LCURVE will be performed to determine absolute parameters (mass, radius) and orbital parameters as separation or period of both stars and determine the nature of the companion. For reduction of spectroscopic data the IRAF program will be used.


Day 1

  • The Perek 2m telescope tour - Miroslav Šlechta
  • Introduction to photometry and spectroscopy - Veronika Schaffenroth
  • Short description of projects - Veronika Schaffenroth
  • Planning an observing run - Veronika Schaffenroth

Day 2
  • Data mining with Topcat - Veronika Schaffenroth
  • Hands-on session: preparing a target list - Veronika Schaffenroth

Day 3
  • Data reduction of the echellette spectra using IRAF - Mauricio Cabezas
  • Hands-on session: reducing spectra - Mauricio Cabezas

Day 4
  • Data reduction of photometry - Veronika Schaffenroth
  • Hands-on session: reducing photometric images - Veronika Schaffenroth

Day 5
  • Evolved stars + Spectral classification - Veronika Schaffenroth
  • Photometric variability of binaries + Light curve analysis - Veronika Schaffenroth
  • Decision of each group to work on which project

Day 6 - Day 10
  • Students will working on their reports in which they should describe the data acquisition, reduction, and analysis based on what they were taught report should also have a short introduction outlining the main astrophysical concepts involved and a results/conclusions section
  • Guided tour talk: 65 cm telescope in Ondřejov - Marek Wolf
  • Stellar Spectroscopy with Virtual Observatory - Petr Škoda
  • Reduction of spectral data from public archives - Olga Maryeva