# Neloura v2

is here!

Cloud version
GitHub
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# Unlimited Cutouts & Zoom Insets

Create as many cutouts and zoomed-in views as you need, with no limitations.

Credits: NGC0628 with JWST. Williams et al. (2024); Lee et al. (2023)

## What you can do with Neloura?

Neloura is a comprehensive platform for astronomical data analysis, specializing in FITS image processing, catalog management, and multi-wavelength visualization. Built on a Python FastAPI backend with a sophisticated JavaScript frontend, and powered by the Astropy ecosystem, Neloura provides an intuitive web-based interface for exploring astronomical datasets with different analysis capabilities.

Browse and preview FITS files

### Explore complex astronomical datasets

Load and interactively explore FITS files with multiple HDUs, including images, data cubes, and tables. Easily switch between extensions, preview their contents, and inspect each component within a unified visualization environment.

NGC 0628 - HST

### Load FITS 2D Images & 3D Data Cubes

Seamlessly load and explore FITS 2D images and 3D spectral cubes with full WCS awareness. Inspect spatial and spectral structures, browse extensions, and interactively navigate large datasets directly in your browser.

ALMA CO (2-1)- NGC 0628

Multi-HDU FITS Support

### Explore complex astronomical datasets

Load and navigate FITS files containing multiple HDUs, including images, data cubes, and tables. Seamlessly switch between extensions and inspect each component within a unified, interactive view.

### Download data directly from NED and MAST

Fetch astronomical datasets straight from NED and MAST and explore FITS 2D images and 3D cubes with full WCS awareness. Inspect spatial and spectral structures, browse multiple HDUs, and interactively navigate large datasets directly in your browser.

Peak Finder Detect and characterize compact sources with configurable peak-finding algorithms, integrated directly into the analysis workflow.
JWST Completeness Run artificial source injection and recovery tests to quantify detection completeness for JWST and other high-resolution datasets.
Fully Configurable Fine-tune analysis, visualization, and performance options through a dedicated settings page— no code changes required.

# Side-by-Side FITS Visualization

Overlay catalogs as circles or hexagons

Credits: NGC0628 with JWST. Williams et al. (2024); Lee et al. (2023)

envoirmental masks

### Overlay Segmentation Maps & Masks

Load region masks and segmentation maps directly on FITS images for visual inspection and analysis.

mask

Segmentation Masks

### Load Generated Segmentation Masks

Overlay pip segmentation masks on FITS images for inspection and analysis.

Image
Next-gen astronomical image visualization and analysis.

### Neloura

Powered by Python and JavaScript, Neloura delivers in-browser visualization of large astronomical mosaics, catalogs, SEDs, and interactive source finding—no installation required. It is designed for the massive datasets expected from SKA, Roman, and other next-generation missions.