These XML Web Services calculate different distance measures in a given cosmology.
Send comments to Tamas Budavari -- budavari[at]pha.jhu.edu

The following operations are supported. For a formal definition, please review the Service Description.

• AngularDiameter
  Return the angular diameter distance
  Input 1: Redshift (float)
  Input 2: Dimensionless Hubble parameter today, h=H/100 (float)
  Input 3: Omega matter (float)
  Input 4: Omega lambda (float)
  Output: Distance in Mpc (float)
• ComovingLineOfSight
  Return the comoving line of sight distance
  Input 1: Redshift (float)
  Input 2: Dimensionless Hubble parameter today, h=H/100 (float)
  Input 3: Omega matter (float)
  Input 4: Omega lambda (float)
  Output: Distance in Mpc (float)
• ComovingTransverse
  Return the comoving transverse a.k.a. proper motion distance
  Input 1: Redshift (float)
  Input 2: Dimensionless Hubble parameter today, h=H/100 (float)
  Input 3: Omega matter (float)
  Input 4: Omega lambda (float)
  Output: Distance in Mpc (float)
• DistanceModulus
  Return the distance modulus
  Input 1: Redshift (float)
  Input 2: Dimensionless Hubble parameter today, h=H/100 (float)
  Input 3: Omega matter (float)
  Input 4: Omega lambda (float)
  Output: Distance modulus DM, as in equation M=m-DM-K (float)
• Hubble
  Return the Hubble distance
  Input 1: Dimensionless Hubble parameter today, h=H/100 (float)
  Output: Distance in Mpc (float)
• Luminosity
  Return the luminosity distance
  Input 1: Redshift (float)
  Input 2: Dimensionless Hubble parameter today, h=H/100 (float)
  Input 3: Omega matter (float)
  Input 4: Omega lambda (float)
  Output: Distance in Mpc (float)
• Revisions
  Return current revision number.