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Lensing in the Blue. II. Estimating the Sensitivity of Stratospheric Balloons to Weak Gravitational Lensing

McCleary, Jacqueline E.; Everett, Spencer W.; Shaaban, Mohamed M.; Gill, Ajay S.; Vassilakis, Georgios N.; Huff, Eric M.; Massey, Richard J.; Benton, Steven J.; Brown, Anthony M.; Clark, Paul; Holder, Bradley; Fraisse, Aurelien A.; Jauzac, Mathilde; Jones, William C.; Lagattuta, David; Leung, Jason S.-Y.; Li, Lun; T. Luu, Thuy Vy; Nagy, Johanna M.; Netterfield, C. Barth; Paracha, Emaad; Redmond, Susan F.; Rhodes, Jason D.; Schmoll, Jürgen; Sirks, Ellen; Tam, Sut Ieng

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Authors

Jacqueline E. McCleary

Spencer W. Everett

Mohamed M. Shaaban

Ajay S. Gill

Georgios N. Vassilakis

Eric M. Huff

Steven J. Benton

Anthony M. Brown

Paul Clark

Bradley Holder

Aurelien A. Fraisse

William C. Jones

Jason S.-Y. Leung

Lun Li

Thuy Vy T. Luu

Johanna M. Nagy

C. Barth Netterfield

Emaad Paracha

Susan F. Redmond

Jason D. Rhodes

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Sut-Ieng Tam sut-ieng.tam@durham.ac.uk
PGR Student Doctor of Philosophy



Abstract

The Superpressure Balloon-borne Imaging Telescope (SuperBIT) is a diffraction-limited, wide-field, 0.5 m, near-infrared to near-ultraviolet observatory designed to exploit the stratosphere's space-like conditions. SuperBIT's 2023 science flight will deliver deep, blue imaging of galaxy clusters for gravitational lensing analysis. In preparation, we have developed a weak-lensing measurement pipeline with modern algorithms for PSF characterization, shape measurement, and shear calibration. We validate our pipeline and forecast SuperBIT survey properties with simulated galaxy cluster observations in SuperBIT's near-UV and blue bandpasses. We predict imaging depth, galaxy number (source) density, and redshift distribution for observations in SuperBIT's three bluest filters; the effect of lensing sample selections is also considered. We find that, in three hours of on-sky integration, SuperBIT can attain a depth of b = 26 mag and a total source density exceeding 40 galaxies per square arcminute. Even with the application of lensing-analysis catalog selections, we find b-band source densities between 25 and 30 galaxies per square arcminute with a median redshift of z = 1.1. Our analysis confirms SuperBIT's capability for weak gravitational lensing measurements in the blue.

Citation

McCleary, J. E., Everett, S. W., Shaaban, M. M., Gill, A. S., Vassilakis, G. N., Huff, E. M., …Tam, S. I. (2023). Lensing in the Blue. II. Estimating the Sensitivity of Stratospheric Balloons to Weak Gravitational Lensing. Astronomical Journal, 166(3), https://doi.org/10.3847/1538-3881/ace7ca

Journal Article Type Article
Acceptance Date Jul 15, 2023
Online Publication Date Aug 31, 2023
Publication Date Sep 1, 2023
Deposit Date Feb 21, 2024
Publicly Available Date Feb 21, 2024
Journal The Astronomical Journal
Print ISSN 0004-6256
Electronic ISSN 1538-3881
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 166
Issue 3
DOI https://doi.org/10.3847/1538-3881/ace7ca
Keywords Space and Planetary Science; Astronomy and Astrophysics
Public URL https://durham-repository.worktribe.com/output/2271781

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