We provide some key recommendations: moving the WFD (Wide-Fast-Deep) footprint to avoid regions of high extinction, taking visit pairs in different filters, changing the 2x15s snaps to a single exposure to improve efficiency, focusing on strategies that reduce long gaps (>15 days) between observations, and prioritizing spatial uniformity at several intervals during the 10-year survey.
![maf lsst astrometry maf lsst astrometry](https://community.lsst.org/uploads/default/original/1X/af46d55a43e8a77b4df65b9867cee715c889331b.png)
In order to reduce systematic uncertainties, we conclude that the current baseline observing strategy needs to be significantly modified to result in the best possible cosmological constraints. We use a variety of metrics to understand the effects of the observing strategy on measurements of weak lensing, large-scale structure, clusters, photometric redshifts, supernovae, strong lensing and kilonovae.
![maf lsst astrometry maf lsst astrometry](https://arxiver.files.wordpress.com/2015/08/lundetal-1508-03175_f12.jpg)
It is accompanied by the DESC more » DDF (Deep Drilling Fields) white paper (Scolnic et al.). This white paper is written by the LSST DESC Observing Strategy Task Force (OSTF), which represents the entire collaboration, and aims to make recommendations on observing strategy that will benefit all cosmological analyses with LSST. Each of the cosmological probes for LSST is heavily impacted by the choice of observing strategy. The LSST Dark Energy Science Collaboration (DESC) has been tasked with deriving constraints on cosmological parameters from LSST data.
#Maf lsst astrometry series
Supplement Series Additional Journal Information: Journal Volume: 259 Journal Issue: 2 Journal ID: ISSN 0067-0049 Publisher: IOP Publishing Country of Publication: United States Language: English Subject: 79 ASTRONOMY AND ASTROPHYSICS cosmology observational cosmology optical telescopes sky = ,Ĭosmology is one of the four science pillars of LSST, which promises to be transformative for our understanding of dark energy and dark matter. (FNAL), Batavia, IL (United States) Sponsoring Org.: USDOE Office of Science (SC), High Energy Physics (HEP) Contributing Org.: LSST Dark Energy Science Collaboratoin OSTI Identifier: 1831975 Report Number(s): FERMILAB-PUB-21-558-SCD arXiv:2104.05676 Journal ID: ISSN 0067-0049 oai::1857922 Grant/Contract Number: AC02-07CH11359 Resource Type: Accepted Manuscript Journal Name: The Astrophysical Journal. (LBNL), Berkeley, CA (United States) Fermi National Accelerator Lab. « less Publication Date: Wed Apr 06 00:00: Research Org.: Lawrence Berkeley National Lab.
#Maf lsst astrometry code
We provide public code for our metrics, which makes them readily available for evaluating further modifications to the survey design. 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 evaluate these metrics for over 100 different simulated potential survey designs. 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).
![maf lsst astrometry maf lsst astrometry](https://www.lsst.org/sites/default/files/SingleAitoff2.png)
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. With such capabilities, it is immensely challenging to optimize the LSST observing strategy across the survey's wide range of science drivers. 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).