What kind of data are released?
Where can I find information on the content of the catalogue?
What is the meaning of the different flags?

• Inside a single strip, association has been done, between bands (I, J, K_s), and overlapping images. Objects from filtered, characterized catalogs are associated based on their positional coincidence and their flags. The positional coincidence is determined by examining the elliptical shape parametrization of each entry.
  When two extractions are in overlap with each other, they are associated only if their IMA_Flags equal zero. When there is one entry with a non-zero IMA_Flag, it will not be associated and thus ends up as a separate entry in the general catalog. This is to avoid merging of good and bad detections.
  
  When a source is present several times in a given band and associated, according to the previous criteria, the resulting entry in the general catalogue will carry the simple flux average for the magnitudes and the weighted average for the coordinates.
  
  
• No pairing is done between adjacent strips. If the same star is detected in the overlap of two adjacent strips (consecutive slots), it will appear twice, with one record for each strip.

• DENIS identifier: The recommended way to designate the DENIS sources is JHHMMSS.s-DDMMSS
• SeqNr: Numbering of the source in the original catalogue
• MAG_APER 7'': Magnitude derived from the flux collected in a fixed 7'' aperture centered on the source.
• MAG_APER 15'': Same as above with 15'' aperture.
• MAG_AUTO: Automatic (Kron type) scaling elliptical aperture magnitude.
• Stellarity of object: a value of 1 identifies the object as a star, and a value of 0 indicates an extended source. Caution: actually, this value is not fully reliable, because PSF fitting is not done in the version of SExtractor used. See the SExtractor documentation for details.
• Extraction flag: defined by SExtractor during source extraction:
  • 1: the object has neighbours, bright and close enough to significantly bias the MAG_AUTO photometry, or bad pixels;
  • 2: the object was originally blended with another one;
  • 4: at least one pixel of the object is saturated (or very close to);
  • 8: the object is truncated (too close to an image boundary);
  • 16: object's aperture data are incomplete or corrupted;
  • 32: object's isophotal data are incomplete or corrupted;
  • 64: a memory overflow occurred during deblending;
  • 128: a memory overflow occurred during extraction.
  Only objects with EXTR_flag<8 were kept in the catalogue.
• Image flag: derived during image processing:
  • 1: regression failed for this pixel;
  • 2: flat derived is less than 0.01;
  • 3: abnormaly high flat;
  • 4: abnormaly high residual after adjustment;
  • 5: bias away from mean by more than 5 sigmas;
  • 9: insufficient pixels left after iterative clipping.
  Only objects with IMA_flag=0 were kept in the catalogue.
• Artifact flag: identifies detector/instrument specific conditions
  • 1: Glitch;
  • 2: Optical Ghost;
  • 4: Saturation in I.
• Merged objects:
  • 0: no detection;
  • 1: good detection;
  • 2 +: object merge.
• Field position: refers back to the frame sequence number (in the range [0..179]) of the image from which the particular source was extracted. In case of a merge, one of the frame numbers in the merge is given.