| Col. | Name | Format | Units [range] | Description |
| 1 | ION | a8 | ISO Observation number | |
| 2 | name | a13 | ISOGAL observation name | |
| 3 | date | a6 | YYMMDD | date of observation |
| 4 | j_day | i4 | Julian day of observation - 2 450 000 | |
| 5 | qual | i1 | [1,2] | quality of imagea |
| 6 | l_off | f5.1 | arcsec | applied offset in Galactic longitudeb |
| 7 | b_off | f5.1 | arcsec | applied offset in Galactic latitude |
| 8 | G_lon | f8.4 | deg [-180-+180] | Galactic longitude of raster centre |
| 9 | G_lat | f8.4 | deg [-90-+90] | Galactic latitude of raster centre |
| 10 | dl | f6.4 | deg | half width of raster in longitude |
| 11 | db | f6.4 | deg | half width of raster in latitude |
| 12 | RA | f8.4 | deg | RA (J2000) of raster centre |
| 13 | DEC | f8.4 | deg | Dec (J2000) of raster centre |
| 14 | filt | i1 | [2,3,5,6,9] | LW filter number |
| 15 | pfov | i1 | arcsec [3,6] | pixel field of view |
| 16 | mag_lim | f5.2 | mag | ISO magnitude cutoffc |
| 17 | nb_sour | i4 | number of extracted sources brighter than mag_lim | |
| 18 | rot | i1 | [0,1] | applied transformation (270 rotation) to the rasterd |
| 19 | x_inv | i1 | [0,1] | applied transformation (x-inversion) to the raster |
| 20 | y_inv | i1 | [0,1] | applied transformation (y-inversion) to the raster |
| 21 | m | i2 | number of raster steps in x in final raster | |
| 22 | n | i2 | number of raster steps in y in final raster | |
| 23 | dm | i3 | arcsec | size of step between x (final) raster positions |
| 24 | dn | i3 | arcsec | size of step between y (final) raster positions |
| 25 | angle | f6.2 | deg | angle from the upward axis to the north in the final raster |
| 26 | NX | i3 | pixel | number of pixels in x of final raster |
| 27 | NY | i3 | pixel | number of pixels in y of final raster |
a Image
quality: 1 is standard quality, 2 is medium quality (in most cases, the problem
is that the first individual image of the raster appears brighter than the other
ones). Images of bad quality have not been used to build the catalogue.
b The astrometry of the published raster images has been corrected to match the DENIS astrometry if any (see Sect. 7). The offset values given in this table have been added to the initial raster coordinates.
c The ISO magnitude cutoff has been computed for each observation to correspond at least approximately to a 50% completeness level (see Sect. 3.4).
d Columns 18-20: all the published images are oriented with l along decreasing x and b along increasing y. In each column, a 1 means that the corresponding transformation has been applied to the initial (OLP7 processed) raster, and a 0 means that this transformation was not needed.
b The astrometry of the published raster images has been corrected to match the DENIS astrometry if any (see Sect. 7). The offset values given in this table have been added to the initial raster coordinates.
c The ISO magnitude cutoff has been computed for each observation to correspond at least approximately to a 50% completeness level (see Sect. 3.4).
d Columns 18-20: all the published images are oriented with l along decreasing x and b along increasing y. In each column, a 1 means that the corresponding transformation has been applied to the initial (OLP7 processed) raster, and a 0 means that this transformation was not needed.