IRAF functions for reddening and extinctions from the Space Telescope Science Data Analysis System (STSDAS) package distributed by the Space Telescope Science Institute (STScI) :
- ebmvlfunc.x: Evaluation of Howarth's LMC extinction curve
ebmvxfunc.x: Extended reddening law extinction function
- GAL1: First galactic reddening law (Seaton's)
- GAL2: Second galactic reddening law (Savage and Mathis's)
- GAL3: Third galactic reddening law (Cardelli, Clayton & Mathis)
- SMC: Reddening law for Small Magellanic Cloud
- LMC: Reddening law for the Large Magellanic Cloud
- XGAL: Extragalactic reddening function
redlaw.x: Interstellar extinction function (ISEF)
- gal_redlaw: Calculates the ISEF for the Galaxy by Savage & Mathis (1979)
- ccm_redlaw: Calculates the ISEF for the Galaxy by Cardelli, Clayton & Mathis (1989)
- lmc_redlaw: Calculates the ISEF for the LMC by Howarth (1983)
- smc_redlaw: Calculates the ISEF for the SMC by Prevot, et al. (1984)
- jbk_redlaw: Returns the ISEF of Whitford (1958), as adapted by Kaler (1976)