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      The Search for Spatial Extension in High-latitude Sources Detected by the Fermi Large Area Telescope

      , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The Fermi-LAT Collaboration
      The Astrophysical Journal Supplement Series
      American Astronomical Society

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          Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds

          We present a full sky 100 micron map that is a reprocessed composite of the COBE/DIRBE and IRAS/ISSA maps, with the zodiacal foreground and confirmed point sources removed. Before using the ISSA maps, we remove the remaining artifacts from the IRAS scan pattern. Using the DIRBE 100 micron and 240 micron data, we have constructed a map of the dust temperature, so that the 100 micron map can be converted to a map proportional to dust column density. The result of these manipulations is a map with DIRBE-quality calibration and IRAS resolution. To generate the full sky dust maps, we must first remove zodiacal light contamination as well as a possible cosmic infrared background (CIB). This is done via a regression analysis of the 100 micron DIRBE map against the Leiden- Dwingeloo map of H_I emission, with corrections for the zodiacal light via a suitable expansion of the DIRBE 25 micron flux. For the 100 micron map, no significant CIB is detected. In the 140 micron and 240 micron maps, where the zodiacal contamination is weaker, we detect the CIB at surprisingly high flux levels of 32 \pm 13 nW/m^2/sr at 140 micron, and 17 \pm 4 nW/m^2/sr at 240 micron (95% confidence). This integrated flux is ~2 times that extrapolated from optical galaxies in the Hubble Deep Field. The primary use of these maps is likely to be as a new estimator of Galactic extinction. We demonstrate that the new maps are twice as accurate as the older Burstein-Heiles estimates in regions of low and moderate reddening. These dust maps will also be useful for estimating millimeter emission that contaminates CMBR experiments and for estimating soft X-ray absorption.
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            The Second EGRET Catalog of High-Energy Gamma-Ray Sources

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              The Crab Nebula: An Astrophysical Chimera

              J. Hester (2008)
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                Author and article information

                Journal
                The Astrophysical Journal Supplement Series
                ApJS
                American Astronomical Society
                1538-4365
                August 01 2018
                August 07 2018
                : 237
                : 2
                : 32
                Article
                10.3847/1538-4365/aacdf7
                452a5432-597f-4790-b87b-fbd81addd098
                © 2018

                http://iopscience.iop.org/info/page/text-and-data-mining

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