Observer's Tools and Generic Standard Stars
Also check the Observing Tools and Services page in Science Users Information.
Positions, Airmass, Almanach...
- 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:
- Airmass, Extinction coefficients, Parallactic angle...:
- Airmasses Calculator: This tool provides hourly airmasses based on site, date, and object coordinates information. It provides tabular output.
- Plots: Draws the airmass curves for a list of objects, for a given night
- Extinction coefficients for La Silla (old danish 1.54m page)
- Paralactic Angle Calculator, originally designed for 1.5Dk+DFOSC, but useful for any observations
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, Filters
Standard Stars
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
- Photometric Calibration OBs for EMMI, SuSI and EFOSC2 (gZipped PostScript, 2Mb)
- UV and Vis Spectrophotometric standards
- Spectrophotometric Calibration OBs for EMMI (gZipped PostScript,
- Infrared
- Photometric Standard Stars: NICMOS and ARNICA
- Spectrophotometric Standards
- Telluric star search tool