Ministerio de Economía y Competitividad Gobierno de Canarias Universidad de La Laguna CSIC Centro de Excelencia Severo Ochoa

Information Technology Service

Software programmes developed at the IAC


  • Description: Simulator and fitter for eclipsing or transiting systems
  • Application: The Universal Transit Modeller (UTM) is a light-curve simulator for all kinds of transiting or eclipsing configurations between arbitrary numbers of several types of objects, which may be stars, planets, planetary moons, and planetary rings. A separate fitting program, UFIT (Universal Fitter) is part of the UTM distribution and may be used to derive best fits to light-curves for any set of continuously variable parameters.
  • Programming language: IDL.
  • Author: Hans Deeg
  • Publication: Astrophysics Source Code Library, record ascl:1412.003


  • Description: Stellar photometry for time-series
  • Application: VAPHOT is an aperture photometry package for precise time-series photometry of uncrowded fields, geared towards the extraction of target lightcurves of eclipsing or transiting systems. Its photometric main routine works within the IRAF environment and is built upon the standard aperture photometry task 'phot' from IRAF, using optimized aperture sizes. The associated analysis program 'VANALIZ' works in the IDL environment. It performs differential photometry with graphical and numerical output. VANALIZ produces plots indicative of photometric stability and permits the interactive evaluation and weighting of comparison stars. Also possible is the automatic or manual suppression of data-points and the output of statistical analyses. Several methods for the calculation of the reference brightness are offered. Specific routines for the analysis of transit 'on'-'off' photometry, comparing the target brightness inside against outside a transit are also available.
  • Programming language: IRAF (VAPHOT) and IDL (VANALIZ).
  • Author: Hans Deeg
  • Publication: Astrophysics Source Code Library, record ascl:1309.002.

FROM_RC3.TAR(tar file, 2 Mb)

  • Programming language: Tcl/tk
  • Operating system: Linux (it could be used on Windows; however, it has not been tested extensively in this operating system)
  • Application: Using a graphical interface, this program can be used to pickup a sample of galaxies from the RC3 catalogue, based on criteria as inclination, distance, coordinates, and morphological type. Additional criteria are planned to be included. An installation and user manual is included in the tar file.
  • Comment: The RC3 catalogue is between the files.
  • Author: Leonel Gutiérrez


  • Description: Code written in FORTRAN. Execution on-line.
  • Application: Computation of synthetic resolved stellar populations with free star formation rate as a function of time, initial mass function, chemical enrichment law and binariety. Several stellar evolution and bolometric correction libraries can be used as input.
  • Authors: Antonio Aparicio Juan and Carme Gallart Gallart


  • Description: Code written in FORTRAN. iac-pop_standalone.tar.bz2: 100 kb
  • Application: Solution of star formation history of resolved galaxies from the analysis of the stellar distribution in their color-magnitude diagram
  • Authors: Antonio Aparicio Juan and Sebastián Hidalgo Rodríguez

LIRISDR(tar file, 30Mb)

  • Description: is a software package developed under the IRAF enviroment.
  • Application: its main application is to reduce near infrared data obtained using the camera/spectrograph LIRIS operating at the William Herschel Telescope. It is divided into two subpackages for imaging and spectroscopic modes. The package is still evolving, watch for coming upgrades.
  • Authors: Jose Acosta Pulido and Miguel Charcos Llorens.

WFPC2_CLEAN.TAR(tar file, 6 Kb)

  • Programming language: IRAF
  • Operating system: Linux
  • Software required: IRAF and the packages 'xdimsum', 'fitsio' (part of the 'tables' package), and  'wfpc' (part of 'stsdas').
  • Application: script written for IRAF intended to prepare easily the images from the WFPC2/HST, doing the following
    • removing ths cosmic rays from the images
    • building the mosaic with the four CCDs
    • extracting the CCD1 with its high resolution
    • combining the images whenever there are more than one
  • Author: Leonel Gutiérrez y Sébastien Comerón

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