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dc.contributor.author
Awan, Humna
dc.contributor.author
Gawiser, Eric
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Kurczynski, Peter
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Lynne Jones, R.
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Zhan, Hu
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Padilla, Nelson David
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dc.contributor.author
Muñoz Arancibia, Alejandra M.
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Orsi, Alvaro
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Cora, Sofia Alejandra
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dc.contributor.author
Yoachim, Peter
dc.date.available
2018-02-16T14:05:47Z
dc.date.issued
2016-09
dc.identifier.citation
Awan, Humna; Gawiser, Eric; Kurczynski, Peter; Lynne Jones, R.; Zhan, Hu; et al.; Testing LSST dither strategies for Survey Uniformity and Large-Scale Structure Systematics; IOP Publishing; Astrophysical Journal; 819; 9-2016; 50-66
dc.identifier.issn
0004-637X
dc.identifier.uri
http://hdl.handle.net/11336/36602
dc.description.abstract
The Large Synoptic Survey Telescope (LSST) will survey the southern sky from 2022{2032 with unprecedented detail. Since the observing strategy can lead to artifacts in the data, we investigate the eects of telescope-pointing osets (called dithers) on the r-band coadded 5 depth yielded after the 10-year survey. We analyze this survey depth for several geometric patterns of dithers (e.g.,random, hexagonal lattice, spiral) with amplitude as large as the radius of the LSST eld-of-view, implemented on dierent timescales (per season, per night, per visit). Our results illustrate that per night and per visit dither assignments are more eective than per season. Also, we find that some dither geometries (e.g., hexagonal lattice) are particularly sensitive to the timescale on whichthe dithers are implemented, while others like random dithers perform well on all timescales. We then model the propagation of depth variations to articial uctuations in galaxy counts, which are a systematic for large-scale structure studies. We calculate the bias in galaxy counts caused by the observing strategy, accounting for photometric calibration uncertainties, dust extinction, and magnitude cuts; uncertainties in this bias limit our ability to account for structure induced by the observing strategy. We nd that after 10 years of the LSST survey, the best dither strategies lead to uncertainties in this bias smaller than the minimum statistical floor for a galaxy catalog as deep asr<27.5. A few of these strategies bring the uncertainties close to the statistical floor for r<25.7 after only one year of survey.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
IOP Publishing
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Galaxies
dc.subject
Surveys
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Dark Energy
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Large Scale Structure of Universe
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Testing LSST dither strategies for Survey Uniformity and Large-Scale Structure Systematics
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-02-07T17:02:23Z
dc.journal.volume
819
dc.journal.pagination
50-66
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Awan, Humna. Rutgers University; Estados Unidos
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Fil: Gawiser, Eric. Rutgers University; Estados Unidos
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Fil: Kurczynski, Peter. Rutgers University; Estados Unidos
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Fil: Lynne Jones, R.. University of Washington; Estados Unidos
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Fil: Zhan, Hu. Chinese Academy of Sciences; República de China
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Fil: Padilla, Nelson David. Pontificia Universidad Católica de Chile; Chile
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Fil: Muñoz Arancibia, Alejandra M.. Pontificia Universidad Católica de Chile; Chile
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Fil: Orsi, Alvaro. Centro de Estudios de Fisica del Cosmos de Aragon; España
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Fil: Cora, Sofia Alejandra. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina
dc.description.fil
Fil: Yoachim, Peter. University of Washington; Estados Unidos
dc.journal.title
Astrophysical Journal
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3847/0004-637X/829/1/50
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.3847/0004-637X/829/1/50/meta
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