Reddening (E(B-V) Map (SFD)
HEALPix, nested, res 9 (Nside=512)
Original Data Source
D. Schlegel, D. Finkbeiner
Schlegel, Finkbeiner & Davis (see 1998 reference below) derived an all-sky map of Galactic reddening, E(B-V), from a composite 100 micron map formed from IRAS/ISSA maps calibrated using DIRBE observations. This E(B-V) map can be used as an estimator of Galactic extinction.
The E(B-V) map provided here was constructed using the data and interpolation software distributed by Schlegel & Finkbeiner via their Berkeley mirror website. Specifically, their routine dust_getval was used to interpolate their high resolution dust maps onto pixel centers appropriate for HEALPix Nside=512. The resultant map is in units of magnitudes. Note that the data are undersampled at this pixelization. Additional products are available from the source websites.
More details can be found in: