Astronomical data reduction with THELI
	    THELI is a tool for the automated reduction of astronomical images.
		It comes in two flavours which are maintained independently:
	      
	      
	     - A graphical user interface
	       
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. Recommended for the general user. Please continue here.
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	      - A set of command-line based scripts
		
 This version is 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. The scripts are mainly optimised for blank fields, and they need to be configured manually to suit the data for your instrument. Please continue here.
		Contact: 
		
	     
 
	      
	      
	      Acknowledging THELI: If your scientific publication is based on either version of THELI, then please cite the following 
	      papers:
		
Schirmer 2013, ApJS, 209, 21
		
Erben,
	      Schirmer, Dietrich et al. 2005, AN 326, 432