ACDS V9.0 - Tue Dec 17 18:03:49 CET 2019
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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)
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MK spectral classifications, 13th General Catalogue, Epoch 2000,
including UBV photometry
Buscombe W.
<Northwestern Univ., Evanston, Illinois ISBN 0-939160-11-3 (1998)>
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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
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(End) Francois Ochsenbein [CDS] 10-Dec-1998