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DIRBE Data Products

DIRBE PROJECT DATA SETS ▼

Product Download Page	Description	No. of Files/Size
Annual Average Sky Maps	Average of intensities for all 10 bands over the entire cryogenic mission; 1 file per band. More...	10 files 11 MB each
Calibrated Annual File (DCAF)	Merged, pixel-ordered, weekly-averaged intensities for cryogenic mission. One file per face of the skycube. More...	6 files ~200 MB each
Calibrated Individual Observations (CIO)	1/8th sec sampled sky survey data listed in pixel order for each day of the cryogenic mission. More...	285 files 60 MB each
CIO Pixel Index	Specifies which pixels are covered in each daily CIO file, and which rows in the CIO file contain data for a given pixel. More...	285 files 1 MB each
DCAF Pixel Index	Specifies which rows in the DCAF file contain data for each DIRBE pixel, and for which weeks of the mission. More...	6 files 1 MB each
e = 90° Sky Maps	Intensities for all 10 bands for the special case of e = 90° ; 1 file per band. More...	10 files 13 MB each
Galactic Plane Maps	Galactic plane subset of e = 90° Sky Maps; Limited to a 6 month interval. More...	1 file 6 MB
Time-Ordered Data	Calibrated time-ordered data; 1 file per week of optimized cryogenic operation. More...	40 files 190 MB each
Weekly Sky Maps	Weekly-averaged intensities for 10 bands and Stokes Q and U parameters for 1.25, 2.2, and 3.5 µn bands: 1 file per week. More...	41 files 28 MB each

DIRBE ANALYZED SCIENCE DATA SETS ▼

Product Download Page	Description	No. of Files/Size
DIRBE Sky And Zodi Atlas (DSZA)	Augmented form of the DCAF; includes a modeled IPD intensity for each week and each wavelength. More...	6 files ~200 MB each
Faint Source Model	Predicted contribution to the diffuse sky brightness due to (faint) stars and other discrete galactic sources. Model sky maps at 1.25, 2.2, 3.5, 4.9, 12 and 25 µn. More...	6 files 5 MB each
Photometric Standard Values	Names, positions, and photometric data for the 92 objects used to establish the baseline relative celestial calibration system. More...	1 file .01 MB each
Pixel Index to DSZA	Analogous to the DCAF pixel index, but for the DSZA. More...	6 files 1 MB each
Solar System Objects Data	DIRBE observations of Mars, Jupiter, Saturn, Uranus, Ceres, Palas, and Vesta, including flux density measurements and ancillary data. More...	7 files .05 MB each
Zodi-Subtracted Mission Average Maps (ZSMA)	Average sky brightness after removal of the DIRBE IPD model for each of the 10 wavelength bands. More...	10 files 6.3 MB each

DIRBE ANCILLARY DATA PRODUCTS ▼

Product Download Page	Description	No. of Files/Size
Beam Characteristics	Table of beam centroids and solid angles as a function of time. More...	1 file 3.2 KB
Beam Profiles	Effective two-dimensional shape of DIRBE beam for each detector. More...	16 files .5 MB each
Color Corrections	Color correction factors needed in case source spectrum is not vIv = constant. More...	1 file 37 KB
DIRBE SkyMap Info	Documentation of the Quad-Sphere projection at DIRBE resolution. This file does not contain any instrument data. More...	1 file 12 MB
System Responses	Normalized system spectral response functions for each wavelength band. More...	1 file 63 KB
TOD Record Structure	Condensed listing of the record structure and contents of the DIRBE Time-Ordered Data. More...	1 file 38 KB

THIRD-PARTY DIRBE PRODUCTS ▼

Product Download Page	Description	No. of Files/Size
Point Source Catalogs at ETSU Site	An all-sky catalog containing infrared photometry in 10 bands from 1.25 to 240 microns for 11,788 of the brightest near and mid-infrared point sources in the sky.	N/A
Cosmoglobe DR2	A global Bayesian analysis of the time-ordered COBE-DIRBE data assisted by additional data from COBE-FIRAS, Gaia, Planck HFI, and WISE. Products include a new set of zodiacal light subtracted mission average (ZSMA) DIRBE maps spanning 1.25 to 240 μm.	N/A

A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC

HEASARC Director: Dr. Andrew F. Ptak

LAMBDA Director: Dr. Thomas M. Essinger-Hileman

NASA Official: Dr. Thomas M. Essinger-Hileman

Web Curator: Mr. Michael R. Greason

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