abstract.tex

% Lead: Leanne
% ApJ rules  -- one paragraph of no more  than 250 words
\begin{abstract}
We present Rubin Data Preview 1 (DP1), the first data from the National Science Foundation--Department of Energy Vera C. Rubin Observatory, comprising raw and calibrated single-epoch images, coadds, difference images, detection catalogs, and ancillary data products.
DP1 is based on \nexposures optical-near-infrared exposures acquired over \nnightscomcam distinct nights by the Rubin Commissioning Camera (LSSTComCam), on the Simonyi Survey Telescope at the Summit Facility on Cerro Pach\'on, Chile in late 2024.
DP1 covers \totalarea distributed across \nfields roughly equal-sized noncontiguous fields, each independently observed in six broad photometric bands, $ugrizy$.
The median FWHM of the point-spread function across all bands is approximately \medianimagequalityallbands, with the sharpest images reaching about \bestimagequality.
The 5$\sigma$  point-source  depths for coadded  images in the deepest field, the Extended Chandra Deep Field South, are $u$ = \udepth,  $g$ = \gdepth, $r$ = \rdepth, $i$ = \idepth, $z$ = \zdepth, $y$ = \ydepth.
Other fields are no more than \maxdepthshalloweranyband shallower in any band, where they have nonzero coverage.
DP1 contains approximately \nobjects distinct astrophysical objects, of which \nextendedobjects are extended in at least one band in coadds, and \nsolarsystemobjects solar system objects, of which \nnewasteroiddiscoveries are new discoveries.
DP1 is approximately \sizeinbytes in size and is available to Vera C. Rubin Observatory data rights holders via the Rubin Science Platform, a cloud-based environment for the analysis of petascale astronomical data.
While small compared to future LSST releases, its high quality and diversity of data support a broad range of early science investigations ahead of full operations in 2026.
\end{abstract}