Observer's Tools and Generic Standard Stars

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

Paranal group on Calibration and Instrument Stability

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

See also Ephemerides and Calculators on the Science User Infomration 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...:
- Plots: draw the airmass curves for a list of objects, for a given night
- Extinction coefficients for La Silla (old danish 1.54m page)
- Table: airmass for one object over one night, tabular output
Paralactic Angle Calculator, originally designed for 1.5Dk+DFOSC, but useful for any observations

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.

This is definitely not a complete list. Some of the instruments have specific lists of standards.

Optical:
- Landolt's Standard Fields, with finding charts scanned
- UVand Vis Spectrophotometric standards
Infrared