The Seventh Data Release of the Sloan Digital Sky Survey

This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDSS-II. It includes 11663 deg^2 of imaging data, with most of the roughly 2000 deg^2 increment over the previous data release lying in regions of low Galactic latitude. The catalog contains five-band photometry for 357 million distinct objects. The survey also includes repeat photometry over 250 deg^2 along the Celestial Equator in the Southern Galactic Cap. A coaddition of these data goes roughly two magnitudes fainter than the main survey. The spectroscopy is now complete over a contiguous area of 7500 deg^2 in the Northern Galactic Cap, closing the gap that was present in previous data releases. There are over 1.6 million spectra in total, including 930,000 galaxies, 120,000 quasars, and 460,000 stars. The data release includes improved stellar photometry at low Galactic latitude. The astrometry has all been recalibrated with the second version of the USNO CCD Astrograph Catalog (UCAC-2), reducing the rms statistical errors at the bright end to 45 milli-arcseconds per coordinate. A systematic error in bright galaxy photometr is less severe than previously reported for the majority of galaxies. Finally, we describe a series of improvements to the spectroscopic reductions, including better flat-fielding and improved wavelength calibration at the blue end, better processing of objects with extremely strong narrow emission lines, and an improved determination of stellar metallicities. (Abridged)Comment: 20 pages, 10 embedded figures. Accepted to ApJS after minor correction

lsst-sqre/documenteer: 1.1.0

<h3>New features</h3> <ul> <li>Update to <a href="https://github.com/lsst-sqre/technote/releases/tag/0.7.0">Technote 0.7.0</a>. This version fixes the CSS for code samples without captions. It also uses the build date as the open graph modification date (<code>og:article:modified_time</code>) if one isn't set explicitly in <code>technote.toml</code>.</li> <li>Add <a href="https://sphinx-design.readthedocs.io/en/latest/"><code>sphinx_design</code></a> as a default extension for technotes. This makes buttons, icons, and grids available to technote authors. See https://sqr-084.lsst.io for examples of buttons.</li> </ul> <h3>Bug fixes</h3> <ul> <li>If the <code>version</code> field in <code>documenteer.toml</code> isn't set, and the project isn't a Python package, then the default value is now "Latest." The former default, <code>None</code>, was invalid.</li> </ul> <h2>What's Changed</h2> <ul> <li>Fix typo in migration doc by @jonathansick in https://github.com/lsst-sqre/documenteer/pull/211</li> <li>[neophile] Update dependencies by @neophile-square in https://github.com/lsst-sqre/documenteer/pull/212</li> <li>[neophile] Update dependencies by @neophile-square in https://github.com/lsst-sqre/documenteer/pull/213</li> <li>Update to technote 0.7 by @jonathansick in https://github.com/lsst-sqre/documenteer/pull/214</li> </ul> <p><strong>Full Changelog</strong>: https://github.com/lsst-sqre/documenteer/compare/1.0.1...1.1.0</p&gt

lsst-sqre/documenteer: 1.3.0

<h2>New features</h2> <ul> <li><p>Added a <code>[sphinx.redirects]</code> table to <code>documenteer.toml</code>. This provides support for configuring page redirects from the TOML configuration. Redirects are useful if pages move because of a content re-organization. This feature is based on <a href="https://github.com/wpilibsuite/sphinxext-rediraffe">sphinx-rediraffe</a>.</p> </li> <li><p>Added the <a href="https://sphinxcontrib-youtube.readthedocs.io/en/latest/index.html">sphinxcontrib-youtube</a> for embedded YouTube and Vimeo videos into documentation pages. This extension is available for both user guides (<code>documenteer.conf.guide</code>) and technotes (<code>documenteer.conf.technotes</code>).</p> </li> </ul> <h2>Bug fixes</h2> <ul> <li><p>Technotes ignore files in the repository with <code>.md</code>, <code>.rst</code>, and <code>.ipynb</code> extensions if they aren't the index file. Since technotes are single-page documents, only the index file should be used as a source file. This change lets authors include auxiliary notebooks with their technotes without having to explicitly exclude them from the technote build process. This is implemented with <code>technote.conf.extend_excludes_for_non_index_source</code>.</p> </li> <li><p>In <code>documenteer.ext.lssttasks</code>, attempt to import <code>_pseudo_parse_arglist</code> from <code>sphinx.domains.python._annotations</code> before falling back to the <code>sphinx.domains.python</code> module. Ultimately this is a workaround.</p> </li> <li><p>Fix setting the rebuild condition for the <code>documenteer.ext.githubbibcache</code> extension.</p> </li> <li><p>Fixed the monospace text baseline alignment issue in Safari for technotes by updating to technote 0.8.0. In this version, the font size of the code is set to be 0.9em so that the browser doesn't push the text below the baseline in case it's larger than the Source Sans body text. This version also changes the font size on the html element to 100% and instead increases the baseline body text size to 1.1rem on the body element. This change should help technotes respect the user's browser font size settings while also making the rem unit work as expected.</p> </li> </ul> <h2>Other changes</h2> <ul> <li>Added <code>defusedxml</code> as a dev dependency. This is used by Sphinx's <code>sphinx.testing.fixtures</code>, but isn't included as a dependency by Sphinx itself. This change ensures that <code>defusedxml</code> is installed when running the tests.</li> </ul> <h2>What's Changed</h2> <ul> <li>DM-44137: Add extend_excludes_for_non_index_source by @jonathansick in https://github.com/lsst-sqre/documenteer/pull/224</li> <li>DM-43638: Update to technote 0.8 to fix baseline alignment for monospace text in technotes by @jonathansick in https://github.com/lsst-sqre/documenteer/pull/225</li> <li>DM-44193: Add [sphinx.redirects] table to documenteer.toml by @jonathansick in https://github.com/lsst-sqre/documenteer/pull/226</li> </ul> <p><strong>Full Changelog</strong>: https://github.com/lsst-sqre/documenteer/compare/1.2.2...1.3.0</p&gt

lsst-sqre/documenteer: 1.2.0

<h2>New features</h2> <ul> <li>Rubin user guides (<code>documenteer.conf.guide</code>) and technotes (<code>documenteer.conf.technote</code>) now include <a href="https://myst-nb.readthedocs.io/en/latest/">MyST-NB</a> to support Jupyter Notebooks in Sphinx documentation. The MyST-NB extension also supersedes MyST-Parser for Markdown syntax support. For guides, Jupyter Notebook files can be intermixed with Markdown (<code>.md</code>) and reStructuredText (<code>.rst</code>) files. An <code>ipynb</code> file is considered as a page in the documentation. For technotes, the Jupyter Notebook must be named <code>index.ipynb</code>. By default, these configurations use MyST-NB's "auto" mode for notebook execution: only if a notebook is missing outputs will it be executed.</li> </ul> <h2>What's Changed</h2> <ul> <li>[neophile] Update dependencies by @neophile-square in https://github.com/lsst-sqre/documenteer/pull/219</li> <li>DM-43485: Integrate MyST-NB for technotes and user guides by @jonathansick in https://github.com/lsst-sqre/documenteer/pull/220</li> </ul> <p><strong>Full Changelog</strong>: https://github.com/lsst-sqre/documenteer/compare/1.1.1...1.2.0</p&gt

lsst-sqre/documenteer: 1.0.1a1

<h2>What's Changed</h2> <ul> <li>Fix typo in migration doc by @jonathansick in https://github.com/lsst-sqre/documenteer/pull/211</li> <li>[neophile] Update dependencies by @neophile-square in https://github.com/lsst-sqre/documenteer/pull/212</li> <li>[neophile] Update dependencies by @neophile-square in https://github.com/lsst-sqre/documenteer/pull/213</li> </ul> <p><strong>Full Changelog</strong>: https://github.com/lsst-sqre/documenteer/compare/1.0.1...1.0.1a1</p&gt

lsst-sqre/documenteer: 1.2.1

<h2>Bug fixes</h2> <ul> <li>Fix the "Source parser for markdown not registered" error for Markdown-based technotes. With the MyST-NB extension the Markdown parser is automatically registered, so the <code>documenteer.conf.technote</code> configuration now resets the <code>source_suffix</code> configuration originally created by the Technote package.</li> </ul> <h2>Other changes</h2> <ul> <li>Being running the "demo" technotes in GitHub Actions CI.</li> <li>Add a Markdown-based demo technote for testing.</li> </ul> <h2>What's Changed</h2> <ul> <li>DM-43617: Fix Source parser for markdown not registered error for technotes by @jonathansick in https://github.com/lsst-sqre/documenteer/pull/221</li> </ul> <p><strong>Full Changelog</strong>: https://github.com/lsst-sqre/documenteer/compare/1.2.0...1.2.1</p&gt

LSST data management software development practices and tools

International audienceThe Large Synoptic Survey Telescope (LSST) is an 8.4m optical survey telescope being constructed on Cerro Pach´on in Chile. The data management system being developed must be able to process the nightly alert data, 20,000 expected transient alerts per minute, in near real time, and construct annual data releases at the petabyte scale. The development team consists of more than 90 people working in six different sites across the US developing an integrated set of software to realize the LSST science goals. In this paper we discuss our agile software development methodology and our API and developer decision making process. We also discuss the software tools that we use for continuous integration and deployment

LSST: from Science Drivers to Reference Design and Anticipated Data Products

International audienceWe describe here the most ambitious survey currently planned in the optical, the Large Synoptic Survey Telescope (LSST). The LSST design is driven by four main science themes: probing dark energy and dark matter, taking an inventory of the solar system, exploring the transient optical sky, and mapping the Milky Way. LSST will be a large, wide-field ground-based system designed to obtain repeated images covering the sky visible from Cerro Pachón in northern Chile. The telescope will have an 8.4 m (6.5 m effective) primary mirror, a 9.6 deg2 field of view, a 3.2-gigapixel camera, and six filters (ugrizy) covering the wavelength range 320–1050 nm. The project is in the construction phase and will begin regular survey operations by 2022. About 90% of the observing time will be devoted to a deep-wide-fast survey mode that will uniformly observe a 18,000 deg2 region about 800 times (summed over all six bands) during the anticipated 10 yr of operations and will yield a co-added map to r ~ 27.5. These data will result in databases including about 32 trillion observations of 20 billion galaxies and a similar number of stars, and they will serve the majority of the primary science programs. The remaining 10% of the observing time will be allocated to special projects such as Very Deep and Very Fast time domain surveys, whose details are currently under discussion. We illustrate how the LSST science drivers led to these choices of system parameters, and we describe the expected data products and their characteristics