A5011512062- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- Distributed and Parallel Computing Systems
- Scientific Computing and Data Management
- Environmental Monitoring and Data Management
- Scientific Research and Discoveries
- Scientific Research and Philosophical Inquiry
- Pulsars and Gravitational Waves Research
- Semantic Web and Ontologies
- Research Data Management Practices
- Business Process Modeling and Analysis
- Astro and Planetary Science
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Advanced Computational Techniques and Applications
- Numerical methods for differential equations
- GNSS positioning and interference
- Service-Oriented Architecture and Web Services
- Advanced Data Storage Technologies
- Big Data Technologies and Applications
- Antenna Design and Analysis
Vera C. Rubin Observatory
2022
Large Synoptic Survey Telescope Corporation
2015-2020
University of Washington
2011-2017
University of Pittsburgh
2005
University of Maine
2002
In this paper, we describe the optical imaging data processing pipeline developed for Subaru Telescope's Hyper Suprime-Cam (HSC) instrument. The HSC Pipeline builds on prototype being by Large Synoptic Survey Data Management system, adding customizations HSC, large-scale capabilities, and novel algorithms that have since been reincorporated into LSST codebase. While designed primarily to reduce Strategic Program (SSP) data, it is also recommended reducing general-observer data. includes high...
The large-scale structure (LSS) in the Universe comprises a complicated filamentary network of matter. We study this using high-resolution simulation formation Λ Cold Dark Matter cosmology. investigate distribution matter between neighbouring large haloes whose masses are comparable to massive clusters galaxies. identify total 228 filaments clusters. Roughly half either warped or lie off cluster–cluster axis. find that straight filaments, on average, shorter than ones. Close cluster pairs...
The Large Synoptic Survey Telescope (LSST) is a large-aperture, wide-field, ground-based survey system that will image the sky in six optical bands from 320 to 1050 nm, uniformly covering approximately $18,000$deg$^2$ of over 800 times. LSST currently under construction on Cerro Pachón Chile, and expected enter operations 2022. Once operational, explore wide range astrophysical questions, discovering "killer" asteroids examining nature Dark Energy. generate average 15 TB data per night,...
The Zwicky Transient Facility (ZTF) survey generates real-time alerts for optical transients, variables, and moving objects discovered in its wide-field survey. We describe the ZTF alert stream distribution processing (filtering) system. system uses existing open-source technologies developed industry: Kafka, a streaming platform, Avro, binary serialization format. used this provide number of advantages use case, including (1) built-in replication, scalability, rewind mechanism; (2)...
Abstract We describe the simulated sky survey underlying second data challenge (DC2) carried out in preparation for analysis of Vera C. Rubin Observatory Legacy Survey Space and Time (LSST) by LSST Dark Energy Science Collaboration (LSST DESC). Significant connections across multiple science domains will be a hallmark LSST; DC2 program represents unique modeling effort that stresses this interconnectivity way has not been attempted before. This encompasses full end-to-end approach: starting...
The LSST will, over a 10-year period, produce multi-color, multi-epoch survey of more than 18000 square degrees the southern sky. It will generate multi-petabyte archive images and catalogs astrophysical sources from which wide variety high-precision statistical studies can be undertaken. To accomplish these goals, project has developed suite modeling simulation tools for use in validating that design as-delivered components system yield data products with required properties. In this paper...
We describe the Metrics Analysis Framework (MAF), an open-source python framework developed to provide a user-friendly, customizable, easily-extensible set of tools for analyzing data sets. MAF is part Large Synoptic Survey Telescope (LSST) Simulations effort. Its initial goal tool evaluate LSST Operations Simulation (OpSim) simulated surveys help understand effects telescope scheduling on survey performance, however can be applied much wider range datasets. The building blocks are...
We report on a study to determine the efficiency of Large Synoptic Survey Telescope (LSST) recover periods, brightnesses, and shapes RR Lyrae stars' light curves in volume extending heliocentric distances 1.5 Mpc. place smoothed 30 type ab 10 c stars 1007 fields across sky, each which represents different realization LSST sampling cadences, that sample five particular observing modes. A curve simulation tool was used idealized curves, returning as it would have been observed by LSST,...
The use of high-quality simulated sky catalogs is essential for the success cosmological surveys. have diverse applications, such as investigating signatures fundamental physics in observables, understanding effect systematic uncertainties on measured signals and testing mitigation strategies reducing these uncertainties, aiding analysis pipeline development testing, survey strategy optimization. list applications growing with improvements quality details that they can provide. Given...
The Large Synoptic Survey Telescope (LSST) is an ambitious astronomical survey with a similarly Data Management component. for LSST includes processing on both nightly and yearly cadences to generate transient alerts, deep catalogs of the static sky, forced photometry light-curves billions objects at hundreds epochs, spanning least decade. algorithms running in these pipelines are individually sophisticated interact subtle ways. This paper provides overview those pipelines, focusing more...
Supernova rates (SNRs) are directly coupled to high-mass stellar birth and evolution. As such, they one of the few direct measures history cosmic In this paper, we describe a probabilistic technique for identifying supernovae within spectroscopic samples galaxies. We present study 52 Type Ia ranging in age from −14 days +40 extracted parent sample ∼350,000 spectra SDSS DR5. find an SNR 0.472+0.048−0.039(Systematic)+0.081−0.071(Statistical)SNu at redshift 〈z〉 = 0.1. This value is higher than...
The Large Synoptic Survey Telescope (LSST) will be an 8.4m optical survey telescope sited in Chile and capable of imaging the entire sky twice a week. data rate approximately 15TB per night requirements to both issue alerts on transient sources within 60 seconds observing create annual releases means that automated management systems processing pipelines are key deliverable LSST construction project. software has been development since 2004 is based C++ core with Python control layer....
The MX Northern Abell Cluster Survey II is the final stage of a program designed to observe rich clusters with m10 ≤ 17.0. We present 1542 new galaxy redshifts within 117 R ≥ 1 cluster fields that have 16.9 17.0, 0h α 24h, -17° δ 90°, and |b| 30°. Of observed for II, 105 were obtained an average eight member redshifts. update m10-z estimator calculate spatial number density be c = (8.25 ± 1.9) × 10-6 h3 Mpc-3 z 0.10. All ACO measured combined two-point correlation function ξ(r) (r/ro)γ...
The Large Synoptic Survey Telescope (LSST) will explore the entire southern sky over 10 years starting in 2022 with unprecedented depth and time sampling six filters, $ugrizy$. Artificial power on scale of 3.5 deg LSST field-of-view contaminate measurements baryonic acoustic oscillations (BAO), which fall at same angular redshift $z \sim 1$. Using HEALPix framework, we demonstrate impact an "un-dithered" survey, $17\%$ each is overlapped by neighboring observations, generating a honeycomb...
The Large Synoptic Survey Telescope (LSST) is an 8.4m optical survey telescope being constructed on Cerro Pach´on in Chile. data management system developed must be able to process the nightly alert data, 20,000 expected transient alerts per minute, near real time, and construct annual releases at petabyte scale. development team consists of more than 90 people working six different sites across US developing integrated set software realize LSST science goals. In this paper we discuss our...
In preparation for cosmological analyses of the Vera C. Rubin Observatory Legacy Survey Space and Time (LSST), LSST Dark Energy Science Collaboration (LSST DESC) has created a 300 deg$^2$ simulated survey as part an effort called Data Challenge 2 (DC2). The DC2 sky survey, in six optical bands with observations following reference observing cadence, was processed Pipelines (19.0.0). this Note, we describe public data release resulting object catalogs coadded images five years along...
The Large Synoptic Survey Telescope will record approximately 2.5x10^6 images over a 10-year interval, using 6 optical filters, with wide variety of cadences on time scales seconds to years. observing program be complexity that it can only realized heavily automated scheduling. LSST OpSim team has devised schedule simulator support development capability. This paper addresses the complex problem how measure success simulation for realization science objectives. Tools called Merit Functions...
The Rubin Observatory Commissioning Camera (ComCam) is a scaled down (144 Megapixel) version of the 3.2 Gigapixel LSSTCam which will start Legacy Survey Space and Time (LSST), currently scheduled to in 2024. purpose ComCam verify interfaces with major subsystems observatory as well evaluate overall performance system prior commissioning hardware on telescope. With delivery all telescope components summit site by 2020, team has already started high-level interface verification, exercising...