U.S. Department of EnergyOffice of Scientific and Technical Information
DMTN-021: Implementation of Image Difference Decorrelation
Abstract
Herein, we describe a method for decorrelating image differences produced by the Alard and Lupton (1998) method of PSF matching. Inspired by the recent work of Zackay et al. (2016) and the prior work of Kaiser [2004], this proposed method uses a single post-subtraction convolution of an image difference to remove the neighboring pixel covariances in the image difference that result from the convolution of the template image by the PSF matching kernel. We describe the method in detail, analyze its effects on image differences (both real and simulated) as well as on detections and photometry of detected sources in decorrelated image differences. We also compare the decorrelated image differences with those resulting from a basic implementation of Zackay et al. (2016). We describe the implementation of the new correction in the LSST image differencing pipeline, and discuss potential issues and areas of future research.
- Authors:
-
- Dept. of Astronomy, University of Washington
- Department of Astrophysical Sciences, Princeton University
- Publication Date:
- Other Number(s):
- Vera C. Rubin Observatory Data Management Technical Note DMTN-021
- DOE Contract Number:
- AC02-76SF00515
- Research Org.:
- NSF-DOE Vera C. Rubin Observatory
- Sponsoring Org.:
- U.S. National Science Foundation; U.S. Department of Energy Office of Science
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
- OSTI Identifier:
- 2586490
- DOI:
- https://doi.org/10.71929/rubin/2586490
Citation Formats
Reiss, David J., and Lupton, Robert H. DMTN-021: Implementation of Image Difference Decorrelation. United States: N. p., 2016.
Web. doi:10.71929/rubin/2586490.
Reiss, David J., & Lupton, Robert H. DMTN-021: Implementation of Image Difference Decorrelation. United States. doi:https://doi.org/10.71929/rubin/2586490
Reiss, David J., and Lupton, Robert H. 2016.
"DMTN-021: Implementation of Image Difference Decorrelation". United States. doi:https://doi.org/10.71929/rubin/2586490. https://www.osti.gov/servlets/purl/2586490. Pub date:Tue Jun 14 00:00:00 EDT 2016
@article{osti_2586490,
title = {DMTN-021: Implementation of Image Difference Decorrelation},
author = {Reiss, David J. and Lupton, Robert H.},
abstractNote = {Herein, we describe a method for decorrelating image differences produced by the Alard and Lupton (1998) method of PSF matching. Inspired by the recent work of Zackay et al. (2016) and the prior work of Kaiser [2004], this proposed method uses a single post-subtraction convolution of an image difference to remove the neighboring pixel covariances in the image difference that result from the convolution of the template image by the PSF matching kernel. We describe the method in detail, analyze its effects on image differences (both real and simulated) as well as on detections and photometry of detected sources in decorrelated image differences. We also compare the decorrelated image differences with those resulting from a basic implementation of Zackay et al. (2016). We describe the implementation of the new correction in the LSST image differencing pipeline, and discuss potential issues and areas of future research.},
doi = {10.71929/rubin/2586490},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 14 00:00:00 EDT 2016},
month = {Tue Jun 14 00:00:00 EDT 2016}
}