LELANTOS

Large-scalE LymAN-alpha TOmography Suite.

LELANTOS creates and manipulates large-scale Lyman-α tomographic maps. It takes the flux-contrast files (delta) produced by picca, converts them into the input of a tomographic solver, runs the reconstruction, and post-processes the resulting 3D map into line-of-sight (pixel) products, tomographic maps, void catalogs and diagnostic plots.

The name is that of the Greek titan associated with hunting and air (found after discussion with E. Chaussidon).

The pipeline at a glance

flowchart LR
    delta["picca deltas"] -->|DeltaConverter| pixel["pixel binary"]
    pixel -->|TomographyManager<br/>(Dachshund)| map["tomographic map"]
    map -->|VoidFinder| voids["void catalog"]
    map --> plots["map / delta plots"]
    voids --> stack["void stacks"]
    voids --> xcorr["QSO-like catalog<br/>(cross-correlation)"]

Every stage can be run individually through a launcher, a script, or the lelantos API — or all at once through a single configuration file with lelantos_interface.py.

Where to go next

• Getting started — install and run your first map.
• Pipeline & config — the end-to-end interface.ini workflow and every configuration option.
• API reference — the documented modules, classes and functions.

Package layout

Component	Role
lelantos.cosmology	Delta ingestion, shuffling/subsampling, solver-input generation, delta/pixel diagnostics
lelantos.tomographic_objects	Core data objects: maps, pixels, deltas, catalogs, property files
lelantos.task_manager	Launch the tomographic solver locally or on a cluster
lelantos.tomography	Map post-processing, slicing/plots, stacking
lelantos.voidfinder	Spherical / watershed void detection and post-processing
lelantos.boxdm	Extract the underlying SaclayMocks dark-matter field
lelantos.utils	Coordinate transforms, interpolation, plotting, logging helpers
lelantos.interface	Config-file driven end-to-end pipeline