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This content will become publicly available on September 26, 2018

Title: Deep Full-sky Coadds from Three Years of WISE and NEOWISE Observations

Here, we have reprocessed over 100 terabytes of single-exposure Wide-field Infrared Survey Explorer (WISE)/NEOWISE images to create the deepest ever full-sky maps at 3-5 microns. We include all publicly available W1 and W2 imaging - a total of ~8 million exposures in each band - from ~37 months of observations spanning 2010 January to 2015 December. Our coadds preserve the native WISE resolution and typically incorporate ~3× more input frames than those of the AllWISE Atlas stacks. Our coadds are designed to enable deep forced photometry, in particular for the Dark Energy Camera Legacy Survey (DECaLS) and Mayall z-Band Legacy Survey (MzLS), both of which are being used to select targets for the Dark Energy Spectroscopic Instrument. We describe newly introduced processing steps aimed at leveraging added redundancy to remove artifacts, with the intent of facilitating uniform target selection and searches for rare/exotic objects (e.g., high-redshift quasars and distant galaxy clusters). Forced photometry depths achieved with these coadds extend 0.56 (0.46) magnitudes deeper in W1 (W2) than is possible with only pre-hibernation WISE imaging.
ORCiD logo [1] ; ORCiD logo [2] ; ORCiD logo [3]
  1. Univ. of California, Berkeley, CA (United States). Berkeley Center for Cosmological Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of Toronto, ON (Canada). Dept. of Astronomy & Astrophysics and Dunlap Inst.; Univ. of Waterloo, ON (Canada). Dept. Physics & Astronomy
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231; NNH17AE75I
Accepted Manuscript
Journal Name:
Astronomical Journal (Online)
Additional Journal Information:
Journal Name: Astronomical Journal (Online); Journal Volume: 154; Journal Issue: 4; Journal ID: ISSN 1538-3881
IOP Publishing - AAAS
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC); National Aeronautic and Space Administration (NASA)
Country of Publication:
United States
79 ASTRONOMY AND ASTROPHYSICS; infrared general; techniques image processing
OSTI Identifier: