SITCOMTN-161: PSF assessment in the field of Abell 360 and shapeHSM shear profile using LSSTComCam data

Journal Article · Fri Jun 20 00:00:00 EDT 2025 · NSF-DOE Vera C. Rubin Observatory

DOI:https://doi.org/10.71929/RUBIN/2572986· OSTI ID:3007256

Dell'Antonio, Ian ^[1]; Fu, Shenming ^[2]; Englebert, Anthony ^[1]

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1. Brown University
2. Brown Univ., Providence, RI (United States)

The Rubin LSSTComCam on-sky campaign performed at the end of 2024 provided observations of the Abell 360 galaxy cluster; these data allow a preliminary study of cluster weak lensing analysis using Rubin Data Preview 1 (DP1) data. Among all the steps required for such analyses, accurate modeling of the PSF is essential. This work uses several diagnostics, mostly based on the residuals between the second moments of stars and the PSF model, to characterize the accuracy of the PSF modeling in the A360 field. We find the level of the residuals to be sufficiently low not to hinder the measurement of the tangential shear profile around A360. With a simple source selection process, we demonstrate that outputs of the LSST Science Pipelines can be used to detect the tangential shear profile in Abell 360 at the 3.6σ level, and our analysis indicates that contamination from PSF modeling systematics is negligible.

• Research Organization: Brown University
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Grant/Contract Number: SC0010010
• OSTI ID: 3007256
• Alternate ID(s): OSTI ID: 2572986
• Report Number(s): AC02-76SF00515
• Journal Information: NSF-DOE Vera C. Rubin Observatory, Journal Name: NSF-DOE Vera C. Rubin Observatory
• Country of Publication: United States
• Language: English