Open Access
Table 3
Main FITS header keywords.
| Keyword | Data type | Meaning |
|---|---|---|
| OBJECT | String | Name of the target galaxy (CAVITY ID) |
| NAXIS1 | Integer | Number of pixels along right ascension axis (Nα) |
| NAXIS2 | Integer | Number of pixels along declination axis (Nδ) |
| NAXIS3 | Integer | Number of pixels along wavelength axis (Nλ) |
| CRPIX1 | Float | Reference pixel of the galaxy center in right ascension |
| CRVAL1 | Float | Right ascension α (J2000) of the galaxy center in degrees |
| CDELT1 | Float | Sampling along right ascension axis in arcsec |
| CRPIX2 | Float | Reference pixel of the galaxy center in declination |
| CRVAL2 | Float | Declination δ (J2000) of the galaxy center in degrees |
| CDELT2 | Float | Sampling along declination axis in arcsec |
| CRVAL3 | Float | Wavelength of the first pixel along the wavelength axis in Å |
| CDELT3 | Float | Sampling of the wavelength axis in Å |
| hierarch CAVITYVER | String | Version of the CAVITY reduction pipeline |
| hierarch PIPE UNITS | String | Units of the flux density |
| hierarch PIPE GALEXT COR | Integer | Applied Galactic Extinction (0 No, 1 Yes) |
| hierarch PIPE GALEXT AV | Float | Galactic V band extinction along line-of-sight |
| hierarch PIPE REDUDATE | String | Date/time the data were reduced |
| hierarch GRAT PPAK PiFj DATE-OBS | String | Date/time of the observation |
| hierarch GRAT PPAK PiFj UT_START | Float | Start of the observation in seconds UT time |
| hierarch GRAT PPAK PiFj UT_END | Float | End of the observation in seconds UT time |
| hierarch GRAT PPAK PiFj AIRMASS | Float | Airmass during the observation |
| hierarch GRAT PPAK PiFj EXPTIME | Float | Exposure time of the observation |
| hierarch GRAT PPAK PiFj HVCOR | Float | Line-of-sight difference to heliocentric velocity |
| hierarch GRAT PPAK PiFj EXT_V | Float | V band atmospheric extinction in magnitudes |
| hierarch GRAT PPAK PiFj PIPE SPEC RES | Float | Homogenised spectral resolution (FWHM) in Å |
| hierarch GRAT PPAK PiFj PIPE NSKY FIB | Integer | Number of averaged sky fibers |
| hierarch GRAT PPAK PiFj PIPE SKY MEAN | Float | V Johnson mean surface brightness (µsky) during observation |
| hierarch GRAT PPAK Pi RELFLUX RATIO MEDIAN | Float | Absolute flux scaling of the combined pointing |
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