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

Abstract

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.

Authors:
 [1];  [2];  [3]
  1. Berkeley Center for Cosmological Physics, New Campbell Hall 341, University of California, Berkeley, CA 94720 (United States)
  2. Department of Astronomy and Astrophysics and Dunlap Institute, University of Toronto, Toronto, ON M5S 3H4 (Canada)
  3. Lawrence Berkeley National Laboratory, Berkeley, CA, 94720 (United States)
Publication Date:
OSTI Identifier:
22663138
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (Online); Journal Volume: 154; Journal Issue: 4; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CAMERAS; GALAXIES; GALAXY CLUSTERS; HIBERNATION; IMAGE PROCESSING; IMAGES; INFRARED SURVEYS; NONLUMINOUS MATTER; PHOTOMETRY; QUASARS; RED SHIFT; RESOLUTION; SKY

Citation Formats

Meisner, A. M., Lang, D., and Schlegel, D. J., E-mail: ameisner@lbl.gov. Deep Full-sky Coadds from Three Years of WISE and NEOWISE Observations. United States: N. p., 2017. Web. doi:10.3847/1538-3881/AA894E.
Meisner, A. M., Lang, D., & Schlegel, D. J., E-mail: ameisner@lbl.gov. Deep Full-sky Coadds from Three Years of WISE and NEOWISE Observations. United States. doi:10.3847/1538-3881/AA894E.
Meisner, A. M., Lang, D., and Schlegel, D. J., E-mail: ameisner@lbl.gov. Sun . "Deep Full-sky Coadds from Three Years of WISE and NEOWISE Observations". United States. doi:10.3847/1538-3881/AA894E.
@article{osti_22663138,
title = {Deep Full-sky Coadds from Three Years of WISE and NEOWISE Observations},
author = {Meisner, A. M. and Lang, D. and Schlegel, D. J., E-mail: ameisner@lbl.gov},
abstractNote = {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.},
doi = {10.3847/1538-3881/AA894E},
journal = {Astronomical Journal (Online)},
number = 4,
volume = 154,
place = {United States},
year = {Sun Oct 01 00:00:00 EDT 2017},
month = {Sun Oct 01 00:00:00 EDT 2017}
}