Neural Network Prediction of Strong Lensing Systems with Domain Adaptation and Uncertainty Quantification

Conference · Wed Oct 23 04:00:00 EDT 2024

OSTI ID:2477330

Agarwal, Shrihan ^[1]; Ćiprijanović, Aleksandra ^[2]; Nord, Brian D. ^[3]

---

1. Chicago U., Astron. Astrophys. Ctr.
2. Chicago U., Astron. Astrophys. Ctr.; Fermilab
3. Chicago U., Astron. Astrophys. Ctr.; Fermilab; Chicago U., KICP

Modeling strong gravitational lenses is computationally expensive for the complex data from modern and next-generation cosmic surveys. Deep learning has emerged as a promising approach for finding lenses and predicting lensing parameters, such as the Einstein radius. Mean-variance Estimators (MVEs) are a common approach for obtaining aleatoric (data) uncertainties from a neural network prediction. However, neural networks have not been demonstrated to perform well on out-of-domain target data successfully - e.g., when trained on simulated data and applied to real, observational data. In this work, we perform the first study of the efficacy of MVEs in combination with unsupervised domain adaptation (UDA) on strong lensing data. The source domain data is noiseless, and the target domain data has noise mimicking modern cosmology surveys. We find that adding UDA to MVE increases the accuracy on the target data by a factor of about two over an MVE model without UDA. Including UDA also permits much more well-calibrated aleatoric uncertainty predictions. Advancements in this approach may enable future applications of MVE models to real observational data.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 2477330
• Report Number(s): FERMILAB-CONF-24-0523-CSAID-PPD; arXiv:2411.03334; oai:inspirehep.net:2846169
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
79 ASTRONOMY AND ASTROPHYSICS