Follow UsWUPPE FITS Keywords
References and comments on FITS keywords are listed below. See main page for background.
| Keyword | Reference(s) | Comments/Notes |
|---|---|---|
| GENERAL KEYWORDS | ||
| EXTNAME | See FITS standards document | FITS convention for naming table extension spectral container |
| EQUINOX | The original WUPPE data used 1950 coordinates (see primary header keywords). These values were precessed using the routine PRECESS from the ASTRON IDL library. | Comments here |
| RADECSYS | FK5 coordinates were calculated by the PRECESS routine from the IDL ASTRON library. | FK5 |
| TIMESYS | ? | UTC? Time system |
| MJDREF | 0.00000 | [d] MJD zero point for times |
| SPECSYS | topocent, no heliocentric-correction? | |
| VOCLASS | 'SPECTRUM V1.0' | VO Data Model |
| VOSEGT | 'SPECTRUM' | Segment type |
| DATALEN | derived from data | [ ] Number of points in spectrum |
| DSSOURCE | 'POINTED' | Survey or Pointed |
| DATA ID KEYWORDS | ||
| DATE | from DATE keyword | Processing-Creation Date |
| VODATE | from IDL "today" command | Curation Date |
| VOREF | 'http://archive.stsci.edu/vodocs/wuppe' | URL for Documentation |
| DS_IDENT | derived from filename | Publishers Data Set ID |
| VERSION | '1.0' | Processing Version |
| COLLECT | 'ASTRO/WUPPE' | Data Set Collection |
| INSTRUME | from OBSERVAT keyword | Instrument |
| TELESCOP | 'WUPPE' | Telescope |
| FILENAME | derived from FILENAME keyword | File Name |
| CR_IDENT | derived from FILENAME keyword | Internal dataset ID |
| CRETYPE | 'Archival' | Not an on-the-fly dataset |
| CURATION KEYWORDS | ||
| VOPUB | 'MAST' | VO Publishing Authority |
| AUTHOR | 'WUPPE project' | Creator |
| VOPUBID | 'ivo://mast.stsci.edu' | URI for VO Publisher |
| VOLOGO | 'http://archive.stsci.edu/images/100.mastlogo.gif' | MAST logo |
| VOVER | '1.0' | VO Curation version |
| VORIGHTS | 'PUBLIC' | Data is public |
| CONTRIB1 | Arthur D. Code | Principal Investigator |
| CONTACT | 'archive help desk' | Comments here |
| 'archive@stsci.edu' | Comments here | |
| TARGET KEYWORDS | ||
| OBJECT | from OBJECT keyword | proposer's target name |
| TITLE | derived from filename and target name | Program Identification |
| RA_TARG | precessed from RA keyword | [deg] right ascension of target |
| DEC_TARG | precessed from DEC keyword | [deg] declination of target |
| WCS Paper 3 Keywords | ||
| 1S2_1 | 'WAVE' | Column name with spectral coordinates |
| 1CYTP2 | 'WAVE-TAB' | Spectral coordinate is wavelength |
| 1S3_1 | 'WAVE' | Column name with spectral coordinates |
| 1CYTP3 | 'WAVE-TAB' | Spectral coordinate is wavelength |
| COVERAGE: SPATIAL | ||
| RA | precessed from RA keyword | [deg] project-defined right ascension |
| DEC | precessed from DEC keyword | [deg] project-defined declination |
| APERTURE | derived from APERTURE keyword | [arcsec] Aperture (radius or lengthxwidth) |
| COVERAGE: TEMPORAL | ||
| DATE-OBS | derived from DATE-OBS and GMTSTART keywords | UT observation start time (only specified to nearest minute) |
| EXPOSURE | from EXPOSURE keyword | [s] exposure duration |
| TSTART | derived from DATE-OBS and GMTSTART converted to MJD using JULDATE procedure from IDL ASTRON library | [d] MJD exposure start time |
| TSTOP | derived from DATE-OBS, GMTSTART + EXPOSURE keywords converted to MJD using JULDATE procedure from IDL ASTRON library | [d] MJD exposure stop time |
| TMID | average of TSTART and TSTOP derived values | [d] MJD exposure mid time |
| COVERAGE: SPECTRAL | ||
| SPECSDIM | '1.0E-10 L' | Comments here |
| SPEC_CAL | Calibrated spectral coordinate | |
| SPEC_ERR | 6 A resolution(?) from http://www.sal.wisc.edu/WUPPE/instrument/instrument.html | [angstrom] Wavelength statistical error |
| SPECBAND | based on derived wavelength range and classifications by Paolo Padovani using the MAST program vo_specband | Far-UV, Near-UV Spectral Band(s) |
| SPEC_VAL | derived from data | [angstrom] Mean Wavelength |
| SPEC_BW | derived from data | [angstrom] Bandpass Width Wmax - Wmin |
| SPEC_FIL | 1.00000 ? | [ ] No gaps between points |
| SPEC_RP | 400(?) | [ ] average resolving power W/dW |
| COVERAGE: OBSERVABLE | ||
| FLUXSDIM | '1.0E+7 ML-1T-3' | Flux SIDim |
| FLUX_CAL | private commnication from marilyn Meade and from comments in FITS header | Fluxes are relative |
| STAT_ERR | from http://www.sal.wisc.edu/WUPPE/calibration/calibration.html | Note from WUPPE web page http://www.sal.wisc.edu/WUPPE/calibration/calibration.html: due to pointing system problems the absolute fluxes of some targets observed through smaller apertures are low by up to a factor of two. |
| DER_SNR | derived value. See der_snr.pdf | [ ] Derived signal-to-noise ratio |
| FLUXAVG | derived from data | [erg/cm**2/s/angstrom] Average Flux |
| FLUXMAX2 | derived from data | [erg/cm**2/s/angstrom] 98% Maximum Flux |
| SPECDISP | derived from data (Wmax-Wmin)/npts | [angstrom/pixel] Dispersion |
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