Further Tools can be found on the Science Users Information Tools and Services pages.

Paranal group on Calibration and Instrument Stability [historical, from 2007]

• CALISTA pages on sky characteristics, as well as lists of standard and calibration stars by observation type and instrument.

Positions, Airmass, Almanach ...

See also Ephemerides and Calculators on the Science User Information page.

• Sky Calendar Tool: Sun rise, Sun set, twilights, Moon rise and set for one full month
• Object Seasonal Observability: visibility of an object over a long period
• Digital Sky Survey:
  • DSS-1 and -2, Full interface at Garching Headquarters
  • 2MASS all-Sky Infrared Survey
• Airmass, Extinction coefficients, Parallactic angle...:
  • Object Visibility Staralt (ING)
  • Extinction coefficients for La Silla (old danish 1.54m page)
  • Table: airmass for one object over one night, tabular output

Units Converters and Ephemeris

• Magnitude/Jansky Convertor (from ST-ECF NICMOS), and the Ultimate Magnitude/Flux/Magnitude convertor, from STSci
• JD converter: Converts civil date to Julian date and reverse
• Horizons Ephemeris calculator from JPL. The code to use for La Silla is 809.

Fluxes, Magnitudes, Exposure Times

• Exposure Time Calculators

Standard Stars

Some of the instruments have specific lists of standards.

• Optical:
  • Landolt's Standard Fields
  • UVand Vis Spectrophotometric standards
  • MUSE Spectral Library
    
• Infrared
  • Photometric Standard Stars: NICMOS and ARNICA
  • Spectrophotometric Standards
    • List
    • Maps
  • Telluric star search tool