What question did this study set out to answer?

This research aims to verify the accuracy of the NT30 Route 3 results by comparing two catalogues: the eROSITA-DE DR1 primary catalogue and a cosmology subsample.

June 7, 2026Open Access

NT38: Selection-Function Cross-Check of the NT30 Route 3 Result — eROSITA-DE DR1 Primary Catalogue vs Cosmology Subsample

Key Points

This research aims to verify the accuracy of the NT30 Route 3 results by comparing two catalogues: the eROSITA-DE DR1 primary catalogue and a cosmology subsample.
Cross-checking NT30 Route 3 results using eROSITA-DE DR1 primary catalogue (N=10,074) and cosmology subsample (N=5,259).
Evaluating selection-function robustness within the CIC/FFT pipeline.
Statistically indistinguishable values of I (−0.06σ) and eI (0.1367 vs 0.1368) between both catalogues.
Both catalogues are distinct from the forward-modelled ΛCDM baseline (+6.0σ and +7.5σ).
Claim 7 remains Advanced pending window-function deconvolution and full mock validation.

Abstract

Cross-check of the NT30 Route 3 result using the eROSITA-DE DR1 primary catalogue (N=10,074, z∈0.1,0.8) vs the cosmology subsample (N=5,259). The primary and cosmology-selected catalogues yield statistically indistinguishable values of I (−0.06σ) and eI (0.1367 vs 0.1368), while both remain separated from the forward-modelled ΛCDM baseline (+6.0σ and +7.5σ respectively within the pipeline). Selection-function robustness is supported within the CIC/FFT pipeline. Claim 7 remains Advanced pending window-function deconvolution and full mock validation.

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