A Bayesian CNN maps 2D slitless spectral images to redshift estimates with NMAD precision 0.0104 for SNR_GI >=1 and better for brighter sources, while remaining robust to wavelength calibration errors via spatial augmentations.
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Realistic black hole dynamics in Astrid reduce baryonic suppression of the matter power spectrum at low redshifts compared to repositioning schemes used in other simulations.
Revised SDSS ugriz zero-points obtained by inverting IRFM on 6000+ FGK stars to match an adopted temperature scale, with largest offset in u band depending on filter curves.
Forecasts using mock CSST lensing and SKA/DSA-2000 FRB DM data show joint analysis improves log10 T_AGN precision from 3.1% to 0.4% and tightens sum m_nu upper limit to <0.47 eV.
New empirical color-Teff calibrations in the SDSS system from IRFM temperatures of 3902 GALAH and 2535 APOGEE stars, with 30-50 K precision for long-baseline colors.
Group-voids identified in CSST mock catalogs with 30-100% spectroscopic completeness reproduce halo-void VSF and density profiles, supporting their use as LSS probes.
The P3 selector achieves 0.9809 purity and 0.8869 completeness for QSO candidates in selected fields, outperforming Gaia's official probabilities.
MUST is a new 6.5 m telescope designed to deliver simultaneous optical spectra for over 20,000 targets across a 5 deg² field, enabling the largest 3D spectroscopic map of the Universe with redshifts for more than 100 million objects over an 8-year survey.
Forecasts from CSST ELG mocks at z=0.3, 0.6, 0.9 show joint power spectrum plus bispectrum analysis constrains f_NL to -20±52 in 1 (h^{-1} Gpc)^3 volume, with bispectrum improving precision by 5-6%.
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Matter Clustering in Astrid: Reduced Baryonic Suppression from Realistic Black Hole Dynamics
Realistic black hole dynamics in Astrid reduce baryonic suppression of the matter power spectrum at low redshifts compared to repositioning schemes used in other simulations.