Title: The Dark Energy Camera Plane Survey 2 (DECaPS2): More Sky, Less Bias, and Better Uncertainties

Abstract

Abstract Deep optical and near-infrared imaging of the entire Galactic plane is essential for understanding our Galaxy’s stars, gas, and dust. The second data release of the Dark Energy Camera (DECam) Plane Survey extends the five-band optical and near-infrared survey of the southern Galactic plane to cover 6.5% of the sky, ∣ b ∣ ≤ 10°, and 6° > ℓ > −124°, complementary to coverage by Pan-STARRS1. Typical single-exposure effective depths, including crowding effects and other complications, are 23.5, 22.6, 22.1, 21.6, and 20.8 mag in g , r , i , z , and Y bands, respectively, with around 1″ seeing. The survey comprises 3.32 billion objects built from 34 billion detections in 21,400 exposures, totaling 260 hr open shutter time on the DECam at Cerro Tololo. The data reduction pipeline features several improvements, including the addition of synthetic source injection tests to validate photometric solutions across the entire survey footprint. A convenient functional form for the detection bias in the faint limit was derived and leveraged to characterize the photometric pipeline performance. A new postprocessing technique was applied to every detection to debias and improve uncertainty estimates of the flux in the presence of structured backgrounds, specifically targetingmore » nebulosity. The images and source catalogs are publicly available at http://decaps.skymaps.info/ .« less

Authors:

Saydjari, Andrew K. ;

• Search DOE PAGES for author "Saydjari, Andrew K."
• Search DOE PAGES for ORCID "0000-0002-6561-9002"

Schlafly, Edward F. ;

• Search DOE PAGES for author "Schlafly, Edward F."
• Search DOE PAGES for ORCID "0000-0002-3569-7421"

Lang, Dustin ;

• Search DOE PAGES for author "Lang, Dustin"
• Search DOE PAGES for ORCID "0000-0002-1172-0754"

Meisner, Aaron M. ;

• Search DOE PAGES for author "Meisner, Aaron M."
• Search DOE PAGES for ORCID "0000-0002-1125-7384"

Green, Gregory M. ;

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• Search DOE PAGES for ORCID "0000-0001-5417-2260"

Zucker, Catherine ;

• Search DOE PAGES for author "Zucker, Catherine"
• Search DOE PAGES for ORCID "0000-0002-2250-730X"

Zelko, Ioana ;

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• Search DOE PAGES for ORCID "0000-0002-7588-976X"

Speagle 沈, Joshua S. 佳士 ;

• Search DOE PAGES for author "Speagle 沈, Joshua S. 佳士"
• Search DOE PAGES for ORCID "0000-0003-2573-9832"

Daylan, Tansu ;

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• Search DOE PAGES for ORCID "0000-0002-6939-9211"

Lee, Albert ;

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• Search DOE PAGES for ORCID "0000-0002-1441-770X"

Valdes, Francisco ;

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• Search DOE PAGES for ORCID "0000-0001-5567-1301"

Schlegel, David ;

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• Search DOE PAGES for ORCID "0000-0002-5042-5088"

Finkbeiner, Douglas P.

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• Search DOE PAGES for ORCID "0000-0003-2808-275X"

Publication Date:

Wed Jan 18 00:00:00 EST 2023

Research Org.:

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:

USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)

OSTI Identifier:

1909744

Alternate Identifier(s):

OSTI ID: 2323907

Grant/Contract Number:  

AC02-05CH11231; AST-1614941; 80NSSC21K0634; NNX08AR22G; AST-1238877

Resource Type:

Published Article

Journal Name:

The Astrophysical Journal. Supplement Series

Additional Journal Information:

Journal Name: The Astrophysical Journal. Supplement Series Journal Volume: 264 Journal Issue: 2; Journal ID: ISSN 0067-0049

Publisher:

American Astronomical Society

Country of Publication:

United States

Language:

English

Subject:

79 ASTRONOMY AND ASTROPHYSICS