The Impact of Observing Strategy on Cosmological Constraints with LSST

Lochner, Michelle; Scolnic, Dan; Almoubayyed, Husni; Anguita, Timo; Awan, Humna; Gawiser, Eric; A Gontcho, Satya Gontcho; Graham, Melissa L.; Gris, Philippe; Huber, Simon; Jha, Saurabh W.; Lynne Jones, R.; Kim, Alex G.; Mandelbaum, Rachel; Marshall, Phil; Petrushevska, Tanja; Regnault, Nicolas; Setzer, Christian N.; Suyu, Sherry H.; Yoachim, Peter; Biswas, Rahul; Blaineau, Tristan; Hook, Isobel; Moniez, Marc; Neilsen, Eric; Peiris, Hiranya; Rothchild, Daniel; Stubbs, Christopher

doi:10.3847/1538-4365/ac5033

Title: The Impact of Observing Strategy on Cosmological Constraints with LSST

Journal Article · Wed Apr 06 00:00:00 EDT 2022 · The Astrophysical Journal. Supplement Series

DOI:https://doi.org/10.3847/1538-4365/ac5033· OSTI ID:1831975

; Scolnic, Dan;

;

; A Gontcho, Satya Gontcho;

; Gris, Philippe; Huber, Simon;

; Lynne Jones, R.; Kim, Alex G.;

; Marshall, Phil;

; Regnault, Nicolas;

;

The generation-defining Vera C. Rubin Observatory will make state-of-the-art measurements of both the static and transient universe through its Legacy Survey for Space and Time (LSST). With such capabilities, it is immensely challenging to optimize the LSST observing strategy across the survey's wide range of science drivers. Many aspects of the LSST observing strategy relevant to the LSST Dark Energy Science Collaboration, such as survey footprint definition, single-visit exposure time, and the cadence of repeat visits in different filters, are yet to be finalized. Here, we present metrics used to assess the impact of observing strategy on the cosmological probes considered most sensitive to survey design; these are large-scale structure, weak lensing, type Ia supernovae, kilonovae, and strong lens systems (as well as photometric redshifts, which enable many of these probes). We evaluate these metrics for over 100 different simulated potential survey designs. Our results show that multiple observing strategy decisions can profoundly impact cosmological constraints with LSST; these include adjusting the survey footprint, ensuring repeat nightly visits are taken in different filters, and enforcing regular cadence. We provide public code for our metrics, which makes them readily available for evaluating further modifications to the survey design. We conclude with a set of recommendations and highlight observing strategy factors that require further research.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States); Univ. of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: LSST Dark Energy Science Collaboration

Grant/Contract Number:: AC02-07CH11359; SC0010118; AC02-05CH11231; SC0019193

OSTI ID:: 1831975

Alternate ID(s):: OSTI ID: 1906902; OSTI ID: 1923766; OSTI ID: 1983569

Report Number(s):: FERMILAB-PUB-21-558-SCD; arXiv:2104.05676; oai:inspirehep.net:1857922; TRN: US2216694

Journal Information:: The Astrophysical Journal. Supplement Series, Vol. 259, Issue 2; ISSN 0067-0049

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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