Inclusion criterion: has to be in some way LSST-specific, not general terms used in astronomy.
Don't see what you're looking for? Request a term!
Refers to the structured communication that is issued rapidly via the internet to the community during the Alert Production. It is intended to characterize the detection of one or more sources that are new, or have changed significantly in position or brightness, relative to the applicable image template.
Part of the LSST Data Management System, an archive center is a data center that hosts the LSST Archive, which includes released science data and metadata, observatory and engineering data, and supporting software such as the LSST Software Stack.
The Association of Universities for Research in Astronomy (AURA) is a consortium of 44 US institutions and 4 international affiliates that operates world-class astronomical observatories. LSST construction project is an operating center under AURA management.
LSST’s 1.2-meter Auxiliary Telescope will measure atmospheric transmission and will be used to calibrate LSST images.
The sequence of pointings, visit exposures, and exposure durations performed over the course of a survey.
The catalog simulator simulates the properties and distributions of stars, galaxies, and asteroids that LSST expects to observe.
An image that is the combination of multiple input images. The inputs are aligned to a common projection and pixel grid, corrected to the same photometric scale and zero-point, with bad pixels and artifacts rejected. (Image PSFs may also be matched prior to co-addition.) Co-Add images have had non-astrophysical background removed.
The commissioning camera is a single-raft, 9-CCD camera that will be installed in LSST during commissioning, before the final camera is ready.
Rafts in the four corners of the focal plane contain special CCsD, used for guiding and focusing.
DACs will provide users with LSST data rights access to LSST data products.
Deblending is the act of inferring the intensity profiles of two or more overlapping sources from a single footprint within an image. Source footprints may overlap in crowded fields, or where the astrophysical phenomena intrinsically overlap (e.g., a supernova embedded in an external galaxy), or by spatial co-incidence (e.g., an asteroid passing in front of a star). Deblending may make use of a priori information from images (e.g., deep Co-Adds or visit images obtained in good seeing), from catalogs, or from models.
A DIA object (often concatenated as DIAObject) is one that has been detected during difference image processing. It is distinguished from a regular object in that its brightness varies in time.
A DIA source (often concatenated as DIASource) is one that has been detected during difference image processing. It is distinguished from a regular source by at least one of the following properties: its uniqueness (i.e., no association to known objects); its variability in brightness; or, if it is associated with a Solar System Object, a change in coordinates.
Refers to the result formed from the pixel-by-pixel difference of two images of the sky, after warping to the same pixel grid and scaling to the same photometric scale. The pixels in a difference thus formed should be zero (apart from noise) except for sources that are new, or have changed in brightness or position. In the LSST context, the difference is generally taken between a visit image and template.
A pipeline that constructs differences between two images (usually a recent visit exposure and a template image) in order to detect sources that are new or that have changed brightness. The input images are transformed to a common grid, scaled to the same photometric response, and matched to the same PSF. Sources are detected above a configurable threshold on the difference image. This pipeline feeds the Alert processing.
ExtUPS (eups for short) is the software component management system that is used for the LSST Stack. It enables a choice of which versions of components should be used for a software build, and ensures that a consistent set is chosen. See the Eups Manual for details.
A focal plane array (FPA) is the arrangement of multiple sensors in the focal plane of a camera. For LSST, the FPA is divided into an array of continguous rafts, upon which 9 science sensors are mounted 3x3. Additional engineering sensors are mounted on rafts near the periphery to support wavefront sensing and telescope guiding.
A measurement of the photometric properties of a source, or expected source, with one or more parameters held fixed. Most often this means fixing the location of the center of the brightness profile (which may be known or predicted in advance), and measuring other properties such as total brightness, shape, and orientation.
Also referred to as science pillars, primary science themes. They are:
GalSim is open-source software for simulating images of astronomical objects (stars, galaxies) in a variety of ways.
LSST Corporation, the non-profit formed to initiate the LSST Project and advance the science of astronomy and physics. It will help provide the funding of LSST in its operational phase.
Often referred to as the LSST Stack, or just Stack, the LSST Data Management System software stack is the collection of software written by the LSST Data Management Team to process, generate, and serve LSST images, transient alerts, and catalogs. It also includes software packages upon which the DM software depends.
Also referrred to as Wide Fast Deep (WFD) is the portion of the LSST survey that will cover >=18,000 square degree of sky to achieve the four main science goal of LSST
Multi-Fit performs a simultaneous fit of multi-component source models to multiple exposures of the same region, taken at different times and in different bands.
The Operations Simulator (OpSim) is an application that simulates the field selection and image acquisition process of the LSST over the 10-year life of the planned survey
The Photon Simulator (PhoSim) simulate realistic astronomical images by tracing photons through the atmosphere and a telescope and camera into pixels.
A Data Release Production (DRP) is a highly controlled episode of processing all accumulated LSST images, in which all output products are generated. This includes generating Deep Co-Adds (various types), Object catalogs, Solar System Body catalogs, and related metadata. DRPs are planned annually during the LSST survey.
The distributed database server to be used for collecting, storing, and serving LSST Catalogs and Project metadata.
The sensors in the LSST camera are packaged into replaceable electronic assemblies, called rafts, consisting of 9 sensors in a 3x3 mosaic.
A single detection of an astrophysical object in an image, the characteristics for which are stored in the Source Catalog of the science database. The Data Management System attempts to associate multiple source detections to single objects, which may vary in brightness or position over time.
Single-band, deep image of the sky composed of a co-add of images from a limited range of epochs. The co-add selection may additionally limited to a limited range of airmass, seeing, or other observation attributes. An image template is used in Difference Image Processing, as a reference for single-visit exposures when detecting transient sources.
Financial support for LSST comes from the National Science Foundation (NSF) through Cooperative Agreement No. 1258333, the Department of Energy (DOE) Office of Science under Contract No. DE-AC02-76SF00515, and private funding raised by the LSST Corporation. The NSF-funded LSST Project Office for construction was established as an operating center under management of the Association of Universities for Research in Astronomy (AURA). The DOE-funded effort to build the LSST camera is managed by the SLAC National Accelerator Laboratory (SLAC).
The National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 to promote the progress of science. NSF supports basic research and people to create knowledge that transforms the future.
NSF and DOE will continue to support LSST in its Operations phase. They will also provide support for scientific research with LSST data.
Contact | We are Hiring | Business with LSST