Links to Astronomical Web Tools

By the Author

  • Cosmo2: Compute Cosmological effects as a function of redshift (by Chip Kobulnicky)
  • Obsplan: Compute observability parameters for astronomical sources as seen from various observatories (by Chip Kobulnicky). See also Skycalc and StarAlt
  • IMF: Compute IMF parameters for a burst of star formation (by Chip Kobulnicky)
  • GROT: Compute kinematic distances based on a Galactic roatation curve (by Chip Kobulnicky, Dan Clemens, Roank Shah)
  • Redshift: Compute velocity of redshift based on input wavelengths (uses full relativistic Doppler shift eqns). (by Chip Kobulnicky)
  • NOT FUNCTIONAL YET: A generic exposure time calculator for optical/IR observations (by Chip Kobulnicky)
  • From the Astronomical Community

  • Look up Extinction values and maps for common filter bandpasses from David Schlegel
  • Find Neutral Hydrogen Columns for lines of sight
  • HST STIS Exposure time calculator at STSCI.
  • Flux Unit Conversion Tool at STSCI (NICMOS).
  • Absorption Law Calculator (by Doug Welch, McMaster U).
  • Julian Date Conversion (by Doug Welch, McMaster U).
  • Date conversion from Goddard Space Flight Center
  • An interesting extra-solar planet gizmo (by John Bray).
  • Coordinate Conversions from Goddard Space Flight Center
  • Viewing Availability for Satellite Observatories from Goddard Space Flight Center
  • X-ray Exposure Time Estimator from Goddard Space Flight Center
  • Other web-based tools