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

Abstract

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.

Authors:
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:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Aeronautic and Space Administration (NASA)
OSTI Identifier:
1421811
DOE Contract Number:  
AC02-05CH11231; NNH17AE75I
Resource Type:
Journal Article
Journal Name:
Astronomical Journal (Online)
Additional Journal Information:
Journal Volume: 154; Journal Issue: 4; Journal ID: ISSN 1538-3881
Publisher:
IOP Publishing - AAAS
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; infrared general; techniques image processing

Citation Formats

Meisner, A. M., Lang, D., and Schlegel, D. J. 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. 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. Tue . "Deep Full-sky Coadds from Three Years of WISE and NEOWISE Observations". United States. doi:10.3847/1538-3881/aa894e. https://www.osti.gov/servlets/purl/1421811.
@article{osti_1421811,
title = {Deep Full-sky Coadds from Three Years of WISE and NEOWISE Observations},
author = {Meisner, A. M. and Lang, D. and Schlegel, D. J.},
abstractNote = {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.},
doi = {10.3847/1538-3881/aa894e},
journal = {Astronomical Journal (Online)},
issn = {1538-3881},
number = 4,
volume = 154,
place = {United States},
year = {2017},
month = {9}
}

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