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Detailed Description of III/206 :
13th General Catalogue of MK Spectral Classification (Buscombe 1998)

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Note : this is the description file of the original catalog. This HTML page corresponds well to the original description, but some minor changes in the format may have been introduced in the FITS output files in order to allow for arithmetic operations on quantities such as coordinates and times. h:m:s and d:m:s units are normally converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the units; the value given in the HTML files supersedes the value indicated in the ReadMe file for this catalogue.
III/206  13th General Catalogue of MK Spectral Classification  (Buscombe 1998)
================================================================================
MK spectral classifications, 13th General Catalogue, Epoch 2000,
including UBV photometry
     Buscombe W.
    <Northwestern Univ., Evanston, Illinois ISBN 0-939160-11-3 (1998)>
================================================================================
ADC_Keywords: Spectral types ; Photometry, UBV


Description:
   A file of MK spectral types and UBV photometry maintained at Dearborn
   Observatory is presented here. It is based on an extensive literature
   search. The annex files (various clusters and associations, and SMC)
   are from the revised 12th catalogue.

File Summary:

FileName Lrecl Records Explanations
× 80 . This file × ReadMe 80 . This file × mk13.dat 80 19208 The 13th General Catalogue × ic1805.dat 80 57 Data for IC1805 × ngc752.dat 80 125 Data for NGC 752 × ngc1977.dat 80 268 Data for Orion trapezium × ngc3293.dat 80 41 Data for NGC 3293 × ngc6087.dat 80 38 Data for NGC 6087 × ngc6475.dat 80 161 Data for NGC 6475 (M 7) × orion.dat 80 244 Data for Orion association × scooph.dat 80 168 Data for upper Sco and Oph association × smc.dat 80 935 Data for Small Magellanic Cloud
Byte-by-byte Description of file: *.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Id Identification for star 14- 15 I2 h RAh Right Ascension (B2000) hour 17- 20 F4.1 min RAm *?Right Ascension (B2000) minute 22 A1 --- DE- Declination sign 23- 24 I2 deg DEd *?Declination (B2000) degree 26- 27 I2 arcmin DEm *? Declination (B2000) minute 28 A1 --- u_DEm [:] DEm uncertain 30- 51 A22 --- SpType MK type 52 A1 --- n_SpType [*] '*' for a standard 53 A1 --- n_Vmag [B] 'B' when Vmag represents a B magnitude 54- 58 F5.2 mag Vmag ? Johnson V magnitude 59 A1 --- u_Vmag *[:m] Uncertainty or mean flag on Vmag 60- 64 F5.2 mag B-V ? Johnson B-V color 65 A1 --- u_B-V *[m] mean flag on B-V 66- 70 F5.2 mag U-B ? Johnson U-B color 75- 80 A6 --- Name Alternate identification, usually HD
Note on RAm, DEd, DEm: the columns RAm and DEd are blank only for a few stars in files ngc1977.dat and ngc6087.dat Note on u_Vmag, u_B-V: The letter 'm' (for mean) is used for mean magnitude of variables (the magnitude is printed within angle brackets like <14.8>)
Acknowledgements: William Buscombe, Derborn Observatory buscombe@nwu.edu ================================================================================ (End) Francois Ochsenbein [CDS] 10-Dec-1998