Bright star subtraction pipeline for LSST: phase one report

Amir E. Bazkiaei; Lee S. Kelvin; Sarah Brough; Simon J. O'Toole; Aaron Watkins; Morgan A. Schmitz

doi:10.1117/12.3019590

25 July 2024 Bright star subtraction pipeline for LSST: phase one report

Amir E. Bazkiaei, Lee S. Kelvin, Sarah Brough, Simon J. O'Toole, Aaron Watkins, Morgan A. Schmitz

Author Affiliations +

Proceedings Volume 13101, Software and Cyberinfrastructure for Astronomy VIII; 131013N (2024) https://doi.org/10.1117/12.3019590
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

We present the phase one report of the Bright Star Subtraction (BSS) pipeline for the Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST). This pipeline is designed to create an extended PSF model by utilizing observed stars, followed by subtracting this model from the bright stars present in LSST data. Running the pipeline on Hyper Suprime-Cam (HSC) data shows a correlation between the shape of the extended PSF model and the position of the detector within the camera’s focal plane. Specifically, detectors positioned closer to the focal plane’s edge exhibit reduced circular symmetry in the extended PSF model. To mitigate this effect, we present an algorithm that enables users to account for the location dependency of the model. Our analysis also indicates that the choice of normalization annulus is crucial for modeling the extended PSF. Smaller annuli can exclude stars due to overlap with saturated regions, while larger annuli may compromise data quality because of lower signal-to-noise ratios. This makes finding the optimal annulus size a challenging but essential task for the BSS pipeline. Applying the BSS pipeline to HSC exposures allows for the subtraction of, on average, 100 to 700 stars brighter than 12th magnitude measured in g-band across a full exposure, with a full HSC exposure comprising ≈100 detectors.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Amir E. Bazkiaei, Lee S. Kelvin, Sarah Brough, Simon J. O'Toole, Aaron Watkins, and Morgan A. Schmitz "Bright star subtraction pipeline for LSST: phase one report", Proc. SPIE 13101, Software and Cyberinfrastructure for Astronomy VIII, 131013N (25 July 2024); https://doi.org/10.1117/12.3019590

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE