THELI is a tool for the automated reduction of astronomical images. Its software modules cover all necessary tasks from raw images of single- and multi-chip CCD cameras up to astrometrically and photometrically calibrated co-added images. The main focus is on observations in optical wavelengths.
It’s available as a GUI and a set of command-line based scripts. These are developed independently.
The THELI GUI is a very flexible and interactive tool, offering a broad range of routines for optical, near- and mid-infrared images. Many different instruments from observatories world-wide are pre-configured.
The scripts are suitable for survey work, i.e. you have a very large number of different pointings taken with the same optical instrument. Contrary to the GUI, it can be run in batch mode, and also on a Linux cluster.
Key Features
- Automated reduction of optical, NIR and MIR data.
- 90 pre-configured instruments.
- Parallelisation.
- Flexible background correction.
- Automatic distortion correction and creation of large mosaics.
- Highly flexible coaddition: e.g. locking onto proper motion targets, various projections, etc.
- Optimized weighting schemes and defect detection.
- Crosstalk and non-linearity correction.
- Atmospheric transparency correction.
- Absolute flux calibration.
- Extensive documentation and online help.
Website: www.astro.uni-bonn.de/theli/gui/index.html (GUI)
Support: FAQ
Developer: Mischa Schirmer (GUI), Thomas Erben (CLI)
License: GNU General Public License v2.0 or any later version (GUI + CLI)
THELI is written in C++. Learn C++ with our recommended free books and free tutorials.
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| Skyfield | Pure-Python astronomy package |
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| IRAF | Image Reduction and Analysis Facility |
| PyRAF | Python-based IRAF command language |
| THELI | Tool for the automated reduction of astronomical images |
| ASTAP | Astrometric STAcking Program |
| ORSA | Framework for celestial mechanics investigations |
| CRUSH | Data reduction and imaging for select astronomical cameras |
Read our verdict in the software roundup.
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