III/92 A Library of Stellar Spectra (Jacoby+ 1984)
A Library of Stellar Spectra Jacoby G.H., Hunter D.A., Christian C.A. <Astrophys. J. Suppl. Ser., 56, 257 (1984)> =1984ApJS...56..257J
ADC_Keywords: Spectrophotometry Description: The machine-readable version of the library contains digital spectra of 161 stars of spectral types O through M and luminosity classes I, III, and V. Most stars are of solar metallicity, although two were chosen specifically for low metallicity. The data were obtained with the Intensified Reticon Scanner on the #1 91-cm telescope at Kitt Peak National Observatory. The scans cover the wavelength range 3510-7427 angstroms, with a resolution of approximately 4.5 angstroms, while the typical photometric uncertainty of each resolution element is about 1 percent and broadband variations are < 3 percent. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 100 161 Information on each star fluxes.dat 80 64400 The Library of Stellar Spectra, flux data
See also: III/83 : IUE Low-Dispersion Reference Atlas I, Normal Stars (Heck+ 1984) III/88 : Stellar Spectrophotometric Atlas (Gunn+ 1983) III/124 : Spectrophotometry of 60 stars (Kiehling, 1987) III/166 : A New Library of Optical Spectra (Silva+ 1992) III/196 : Near-IR stellar spectra from 1.428 to 2.5 um (Lancon+ 1996) VI/50 : Intensity Distribution of Normal Stars (Sviderskiene, 1988) J/PASP/110/863 : A Stellar Spectral Flux Library 1150-25000Å (Pickles 1998) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1 A1 --- f_Name [*] Name corrected from original version 2- 11 A10 --- Name *Star identification (HD, BD, SAO, misc.) 13- 16 A4 --- SpT Adopted spectral type. 17- 19 A3 --- Lum Adopted luminosity class 21- 22 A2 --- Sp1 Spectral type from lit. if different 24- 26 A3 --- Lum1 Luminosity class from literature if different 28- 31 F4.2 mag E(B-V) *Derived color excess E(B-V) 33- 36 F4.2 mag (U-B)s U-B color synthesized from the spectrum. 38- 41 F4.2 mag (B-V)s B-V color synthesized from the spectrum. 43- 47 F5.2 mag (U-B)0 Dereddened color derived from (U-B)s 49- 52 F4.2 --- (B-V)0 Dereddened color derived from (B-V)s 54- 57 F4.2 mag U-B ? U-B color taken from the literature. 59- 62 F4.2 mag B-V ? B-V color taken from the literature. 64- 70 F7.2 0.1nm lambda1  Wavelength of first pixel 72- 75 F4.2 0.1nm Dlambda [1.40] Wavelength increment per pixel 77- 78 I2 h RAh *?Right Ascension J2000 (hours) 80- 81 I2 min RAm *?Right Ascension J2000 (minutes) 83- 87 F5.2 s RAs *?Right Ascension J2000 (seconds) 90 A1 --- DE- *?Declination J2000 (sign) 91- 92 I2 deg DEd *?Declination J2000 (degrees) 94- 95 I2 arcmin DEm *?Declination J2000 (minutes) 97-100 F4.1 arcsec DEs *?Declination J2000 (seconds)
Note on E(B-V): Derived color excess, E(B-V), used to to deredden the spectrum. Note on Name, n_Name, RAh, RAm, RAs, DE-, DEd, DEm, DEs: Four stars (# 47, 94, 124, 128) have an asterisk (*) in the first byte, corresponding to the difficulties to identify them; for more details, see the "History" section below.
Byte-by-byte Description of file: fluxes.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Star identification from headers.dat 11- 80 7E10.3 cW/m2/nm F(i) *? Flux values F(i) in erg/cm^2^/s/Å
Note on F(i): Flux values F(i) in erg/cm2/s/Angstrom at wavelengths: lambda(i) = lambda1 + (i-1+[7*(L-1)])*Dlambda where L is the number of the line for the star of interest. There are 400 lines of fluxes for each star. Hence, L is the line number in the file, modulo 400. In the final record for each star, the seventh flux on the record appears blank.
History: * 24-May-1993 [CDS] The original data pertaining to each star were contained in a group of 352 data records. The first two (header) records contained general information about the star, such as identification, spectral type, UBV colors and reddening, intrinsic UBV colors, and wavelength information. Records 3-352 contained 2799 flux values in groups of eight fluxes per record. The original file can easily be rebuilt by splitting each record in 352 80-bytes records; this split is straightforward on Unix workstations with the "fold" command. * 23-Aug-1996 Julie Anne Watko [SSDOO/ADC] The previous version of this catalog contained all data for each star on a single record. To provide a more useful lrecl, the long records were folded into 70-byte records using the Unix fold command. J.A. Watko [ADC] used IDL to insert star identification into the first 10 bytes of each record and to create a separate file of header data. * 06-Oct-1998 [CDS] Positions of the stars were added when possible --- four stars could not be recognized: #47 [TR A 14 (G4 V)], #94 [HD 249240 (G7 III)], #124 [SIV P 24 (B9 Ib)], #128 [42 LSI (A2 I)] * 17-Aug-2012 [CDS] Following private communications with G. Jacoby, 3 of the stars could be recovered (the old names are in the file "new=old.txt"): * #94 originally HD 249240, is HD 249420; * #124 originally LSIV P 24, is LS I +60 87 (not certain) * #128 originally 42 LSI, is LS I +57 42; Acknowledgement: Documentation for the original version was written by Wayne H. Warren, Jr. [NSSDC/WDC-A-R&S] November 1984 (file "doc_ori.txt"). This ReadMe file is a revision of Dr. Warren's original document and an Intro document [CDS] 24-May-1993 to the current CDS standard. References: Jacoby G.H., Hunter D.A. and Christian C.A. 1984, A Library of Stellar Spectra, Astrophys. J. Suppl. Ser. 56, 278. (1984ApJS...56..257J)
(End) Julie Anne Watko [SSDOO/ADC], Francois Ochsenbein [CDS] 06-Oct-1998
|The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line|