3083 III/83 IUE Low-Dispersion Reference Atlas I, Normal Stars A Heck D Egret M Jaschek C Jaschek Astron. Astrophys. Suppl. Ser. 57 213 1984 1984A&AS...57..213H Spectrophotometry Spectra, ultraviolet The atlas contains the fluxes (2 angstroms/step) of 229 low-dispersion stellar spectra collected by the International Ultraviolet Explorer (IUE) satellite, compiled for the purpose of establishing reference spectral sequences in the ultraviolet range. The sequences have been constructed and the standard stars selected directly from the ultraviolet material, staying as far as possible within the general MK frame. The catalog is essentially composed of stars exhibiting normal behaviour in the ultraviolet. A few peculiar objects have, however, been included as an illustration of typical abnormalities. This work clearly pointed out the dangers of extrapolating a spectral classification based on a given wavelength range to another one, and, in particular, of using the MK spectral type alone outside its definition range.

IUE

ID Identification of the star (preferably HD) Each star occupies 205 records of the catalog. ID is repeated. For a list of the sources in order of appearance in this file, please see sources.dat. --- Fmax Maximum flux on plot Value used as maximum on the y-axis when plotting the spectrum for the atlas. Repeated on each line for same star. (unit : 10-14 erg cm-2 A-1 s-1) 10-17W/m2/A Num Record number for the star --- Lambda Wavelength for first flux value in record 0.1nm Flux1 Calibrated absolute fluxes (erg s-1 cm-2 A-1) Each star has fluxes given for wavelengths 1153A to 3201A stepped by 2A. Five fluxes are given per record. The 205 records for each star are labeled in the Num field. mW/m2/A Flux2 Flux for ({Lambda} + 2A) mW/m2/A Flux3 Flux for ({Lambda} + 4A) mW/m2/A Flux4 Flux for ({Lambda} + 6A) mW/m2/A Flux5 Flux for ({Lambda} + 8A) mW/m2/A RAh Right Ascension 2000 (hours) h RAm Right Ascension 2000 (minutes) min RAs Right Ascension 2000 (seconds) s DE- Declination 2000 (sign) --- DEd Declination 2000 (degrees) deg DEm Declination 2000 (minutes) arcmin DEs Declination 2000 (seconds) arcsec ID Identification of the star (preferably HD) --- Fmax Maximum flux on atlas plot of spectrum 10-17W/m2/Angstroem Julie Anne Watko SSDOO/ADC 1997Jan02 UNKNOWN UNKNOWN Francois Ochsenbein [CDS] 03-Dec-1993 The original file has been transformed to allow easier computer reading: the redundant 1025 wavelength values (1153 to 3201 stepped by 2) were removed, floating-point numbers were normalized with the addition of the "E" between the mantissa and the exponent. Julie Anne Watko [ADC] 02-JAN-1997 The data file had been formatted with one line per star. The old 10270 byte records were difficult to read on some computers. Fluxes were reformatted to accommodate an 80 byte logical record length. Running numbers and wavelengths were added. sources.dat was created, and the Intro document from CDS was updated. The 2000-position of stars was added at CDS (F.O., 08-Oct-1997) III_83.xml