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galactic_reddening [2022/03/02 11:36] Déborah Paradis |
galactic_reddening [2024/05/13 15:25] (current) 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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| var aladin_01 = A.aladin('#aladin-lite-div-ebv', {zoom:170}); | var aladin_01 = A.aladin('#aladin-lite-div-ebv', {zoom:170}); | ||
| aladin_01.setFrame('Equatorial'); | aladin_01.setFrame('Equatorial'); | ||
| - | aladin_01.gotoPosition(0, 0); | + | aladin_01.gotoPosition(270, -10); |
| aladin_01.setImageSurvey(aladin_01.createImageSurvey( | aladin_01.setImageSurvey(aladin_01.createImageSurvey( | ||
| 'EBV_SFD98', 'EBV_SFD98', | 'EBV_SFD98', 'EBV_SFD98', | ||
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| </html> | </html> | ||
| - | === Additional Maps === | + | |
| + | ===HiPS === | ||
| + | |||
| + | Enter the following URL in Aladin ("Files" then "Use directly a URL"):\\ | ||
| + | http://cade.irap.omp.eu/documents/Ancillary/4Aladin/EBV_SFD98 | ||