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First multi-night results from the DECam Ecliptic Exploration Project (DEEP)

Presentation #501.05 in the session Objects on the Edge (of our Solar System).

Published onOct 20, 2022
First multi-night results from the DECam Ecliptic Exploration Project (DEEP)

We present the first set of 109 trans-Neptunian objects (TNOs) linked across data taken between 2019-2021 from the DECam Ecliptic Exploration Project (DEEP). Of these 109 TNOs, we have not been able to match 105 to previously known TNOs. Each individual detection for our objects was recovered in a digital tracking search for TNOs using two to four hour exposure sets, and the detections were subsequently linked across multiple observing seasons. The final orbits use a specialized orbit fitting procedure that accounts for the positional errors derived from the digital tracking procedure. In addition to this catalog, we also present our survey simulator, a software routine that allows the user to directly determine which members of a synthetic population would be detectable by the survey, and thus allows for direct comparison between models and data. Combining these tools with a comprehensive set of synthetic objects injected into our images and recovered in a blind search, we determined our magnitude of 25% efficiency to be mVR = 26.2 for the multi-year data in this DEEP quadrant, with an overall efficiency for bright objects inside our pointing groups is 78%. Early results include a mid-a object found at 78 au, robust orbits and magnitudes for H ~ 10 classical TNOs and preliminary inferences on the structure of the Kuiper belt.

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