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galactic_reddening [2022/03/02 12:03] Déborah Paradis |
galactic_reddening [2023/04/11 15:23] Déborah Paradis |
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| Schlegel, Finkbeiner & Davis (SFD98) derived an all-sky map of Galactic reddening, E(B-V), from a composite 100 micron emission map constructed from the IRAS/ISSA observations, and calibrated using DIRBE. The resulting E(B-V) map is in units of magnitudes and is frequently used to estimate Galactic foreground extinction. | Schlegel, Finkbeiner & Davis (SFD98) derived an all-sky map of Galactic reddening, E(B-V), from a composite 100 micron emission map constructed from the IRAS/ISSA observations, and calibrated using DIRBE. The resulting E(B-V) map is in units of magnitudes and is frequently used to estimate Galactic foreground extinction. | ||
| - | The full-sky SFD98 E(B-V) map distributed here is in J2000 Equatorial coordinates with NSIDE=512. It was derived from the full-sky SFD98 E(B-V) map in Galactic coordinates that is available from NASA's LAMBDA portal [[https://lambda.gsfc.nasa.gov/product/foreground/fg_ebv_map.cfm | here]]. The LAMBDA full-sky Galactic Healpix map was drizzled onto J2000 Equatorial WCS FITS templates (each with 500 x 500 1.'5 square pixels), which were then combined using the drizzling algorithm to create the full-sky J2000 Equatorial Healpix map. More information about the limitations and caveats of the original Galactic SFD98 E(B-V) Healpix map is available on the LAMBDA page. | + | The full-sky SFD98 E(B-V) map distributed here is in J2000 Equatorial coordinates with NSIDE=512. It was derived from the full-sky SFD98 E(B-V) map in Galactic coordinates that is available from NASA's LAMBDA portal [[https://lambda.gsfc.nasa.gov/product/foreground/fg_ebv_map.cfm | here]]. The LAMBDA full-sky Galactic Healpix map was drizzled onto J2000 Equatorial WCS FITS templates (each with 500 x 500 1.'5 square pixels), which were then combined using the drizzling algorithm to create the full-sky J2000 Equatorial Healpix map. More information about the limitations and caveats of the original Galactic SFD98 E(B-V) Healpix map is available on the LAMBDA page. \\ |
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| + | Healpix map made by A. Hughes. | ||
| === References === | === References === | ||
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| </script> | </script> | ||
| </html> | </html> | ||
| - | === Additional Maps === | ||
| ===HiPS === | ===HiPS === | ||
| - | Enter the following URLs in Aladin ("Files" then "Use directly a URL"): | + | Enter the following URL in Aladin ("Files" then "Use directly a URL"): |
| http://cade.irap.omp.eu/documents/Ancillary/4Aladin/EBV_SFD98 | http://cade.irap.omp.eu/documents/Ancillary/4Aladin/EBV_SFD98 | ||