AAS 199th meeting, Washington, DC, January 2002
Session 101. DPOSS, LONEOS, LSST and DLS: New Survey Results
Display, Wednesday, January 9, 2002, 9:20am-6:30pm, Exhibit Hall

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[101.14] The Deep Lens Survey : Real--time Optical Transient and Moving Object Detection

Andy Becker, David Wittman (Bell Labs, Lucent), Chris Stubbs (U. Washington), Ian Dell'Antonio (Brown U.), Dinesh Loomba (UNM), Robert Schommer (NOAO), J. Anthony Tyson, Vera Margoniner (Bell Labs, Lucent), DLS Collaboration

We report on the real-time optical transient program of the Deep Lens Survey (DLS). Meeting the DLS core science weak-lensing objective requires repeated visits to the same part of the sky, 20 visits for 63 sub-fields in 4 filters, on a 4-m telescope. These data are reduced in real-time, and differenced against each other on all available timescales. Our observing strategy is optimized to allow sensitivity to transients on several minute, one day, one month, and one year timescales. The depth of the survey allows us to detect and classify both moving and stationary transients down to ~25th magnitude, a relatively unconstrained region of astronomical variability space. All transients and moving objects, including asteroids, Kuiper belt (or trans-Neptunian) objects, variable stars, supernovae, 'unknown' bursts with no apparent host, orphan gamma-ray burst afterglows, as well as airplanes, are posted on the web in real-time for use by the community. We emphasize our sensitivity to detect and respond in real-time to orphan afterglows of gamma-ray bursts, and present one candidate orphan in the field of Abell 1836. See http://dls.bell-labs.com/transients.html.

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