While most of my programming concerns ill-posed problems, I have also written a program which can hopefully be useful to photometrists. This is a photometric data reduction program. Currently it works under MS DOS only! Its main features are:

• Very flexible interactive user interface;
• Correction of the data for the atmospheric extinction;
• Two methods for deriving extinction coefficients:
  • using special observations of standard stars, and
  • using comparison stars observations (under some conditions);
• Safety: a user cannot get into a trouble whatever he(she) is doing.

There exists built-in small help in English which I hope will suffice to try the program out. Please feel free to ask me for any additional information.

All above files are stored is a self-extracting archive file for MS DOS, which you can get right away. Be sure to press a SHIFT key while clicking on merl.exe.