| FITS keyword | content |
| OBJECT | name of standard star |
| RA | Right ascension (J2000.0) (degrees) |
| DEC | Declination (J2000.0) (degrees) |
| Epoch | 2000.0 |
| RA_S | RA (HH MM SS) |
| DEC_S | DEC (DD mm ss) |
| N | Number of nights observed for standard magnitude (Landolt catalogue) |
| M | Number of measurements for standard magnitude (Landolt catalogue) |
| U, B, V, R, I | Standard magnitudes |
| B_V, U_B, V_R,
R_I, V_I |
Standard colours |
| ERR_V, ERR_B_V,
ERR_U_B, ERR_V_R, ERR_R_I, ERR_V_I |
Errors (rms) of V magnitude and colours (Landolt catalogue) |
| XPIX, YPIX | pixel coordinates of identified source |
| RA_mea, DEC_mea | RA, DEC coordinates of identified source |
| FLUX_<filter> | extracted flux of source in ADU/sec, in filter |
| MAG_<filter> | flux in mag = -2.5 log FLUX_<filter> |
| SKY | background (ADU/sec) |
| FWHM | FWHM (arcs) of stellar image |
| ELLIP | ellipticity |
| NPIX | number of pixels extracted |
| ELL_A, ELL_B | major axis, minor axis of stellar image in pixels |
| ROTANG | angle between major axis and X axis |
| FLAGS | SExtractor flags |
| XSTARTPIX, YSTARTPIX,
XENDPIX, YENDPIX |
technical |
| S2N | signal to noise ratio |
| AIRMASS | airmass (begin of exposure) |
| MJD | MJD (begin of exposure) |
| DIST | distance (in arcsec) between catalogue position and found position |
| ZEROPOINT | MAG_<filter> - standard magnitude |
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