Contents

During the 1st day, we will learn all the essential aspects from the SExtractor software to perform Aperture Photometry on our Astronomical Images . In particular:

  • How to configure the SExtractor software: *.sex + *.param
  • How to execute SExtractor to perform single and dual-mode photometry.
  • How to generate multi-band photometric catalogues.
  • How to derive multiple aperture photometry to extract growth-light curves.
  • How to create added-value images: segmentation, aperture and background-maps.
  • How to create (png or jpeg) color-images from FITS images with Trilogy.
  • How to trim them out to generate color stamps for our preferred targets.
  • How to create mosaic-like (FITS) images to visualize galaxies in several bands.
  • How to visualize our astronomical images using the Aladin software.
  • How to read and display our catalogues on our (FITS) images using Topcat.


During the 2nd day, after a previous revision on the different methodologies existing nowadays, we will learn how to derive Bayesian Photometric Redshifts. In particular:

  • How to configure the BPZ (v1.0) code: Libraries, Priors & Grids.
  • How to optimally execute BPZ depending on the scientific case.
  • How to adapt photometric catalogues to the BPZ standards.
  • How to quantify the precision reached by of our photo-z estimates.
  • How to visualize our SED fittings and the PDF of galaxies.
  • How to execute BPZ in mode ONLY_TYPE=yes to look for best models.
  • How to identify systematics between data and models.

In both days the school with start at 9:00 and it will finish close to 17:30 hrs.