III/150A Perkins Revised MK Types for the Cooler Stars (Keenan+ 1989)
The Perkins Catalog of Revised MK Types for the Cooler Stars
Keenan P.C., McNeil R.C.
<Astrophys. J. Suppl. Ser., 71, 245 (1989)>
=1989ApJS...71..245K 1989ApJS...71..245K
ADC_Keywords: MK spectral classification ; Spectral types ;
Stars, late-type ; Stars, standard
Description:
The original catalog of standard stars classified on the Revised MK
system published in 1989 contains 1054 standard stars of spectral
types G0 and later (G, K, M, and a few S stars) classified at the
Perkins Observatory. The present version of the catalog takes into
account the revisions (before 14h of RA) presented by Philip C. Keenan
and Gerald H. Newsom at the Department of Astronomy of the Ohio State
University (http://www-astronomy.mps.ohio-state.edu/MKCool) dated
2000 January; the Sun (G2V star) has been omitted from the catalog.
Accurate positions were added in 2003.
The revised MK system is described by Keenan (1987PASP...99..713K 1987PASP...99..713K).
The spectrograms used for the classification were taken at four
different observatories; hence, extensive comparisons have been made
to ensure consistency between the Northern and Southern Hemispheres.
The list provides a consistent set of standards in most parts of the
sky and over a considerable range in magnitude, for stars later than
G0. The catalog is not a survey complete to any magnitude and is not
intended for statistical studies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
mkcat.dat 100 1136 Catalog of Revised MK types, version 2003
notes.dat 58 747 Notes to the catalog
perkins.dat 100 1061 Original version of catalog (1989)
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See also:
http://www.astronomy.ohio-state.edu/MKCool/ : The Revised Catalog of
MK Spectra Types for the Cooler Stars
III/18 : Stellar Spectra Classified in Morgan-Keenan System (Jaschek+ 1964)
III/42 : Selected MK Spectral Types (Jaschek, 1978)
Byte-by-byte Description of file: mkcat.dat
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Bytes Format Units Label Explanations
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1 A1 --- St [+] Indicates a star added from original version
2- 12 A11 --- Name Main identification of the star
14- 26 A13 --- OName Alternative designation
31- 32 I2 h RAh Right Ascension J2000 (hours) (1)
34- 35 I2 min RAm Right Ascension J2000 (minutes) (1)
37- 41 F5.2 s RAs Right Ascension J2000 (seconds) (1)
43 A1 --- DE- Declination J2000 (sign) (1)
44- 45 I2 deg DEd Declination J2000 (degrees) (1)
47- 48 I2 arcmin DEm Declination J2000 (minutes) (1)
50- 53 F4.1 arcsec DEs Declination J2000 (seconds) (1)
55 A1 --- rPos [TBCU-] Origin of position (1)
58 A1 --- n_SpType [+] indicates best determined spectral standards
59- 85 A27 --- SpType MK Spectral Type (5)
86- 91 F6.2 mag Vmag ? V magnitude
92 A1 --- u_Vmag [:v] uncertainty of variability flag
93- 97 F5.2 mag Vmag2 ? Second V magnitude for other star type (2)
98 A1 --- u_Vmag2 [p:] additional note for Vmag (3)
100 A1 --- Note [*+] indicates a note detailed in "notes.dat" (4)
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Note (1):
Origin of the position in column rPos, defined as follows:
B = Bordeaux meridian circle (2001A&A...376..325R 2001A&A...376..325R, I/272)
C = Carlsberg CMC11 (I/256)
T = Tycho-2 (2000A&A...357..367H 2000A&A...357..367H, I/259)
U = UCAC1 (2000AJ....120.2131Z 2000AJ....120.2131Z, I/268)
- = computed J2000 from various sources
Note (2):
The V magnitude, taken whenever possible from the catalog of Nicolet.
(Cat. II/48)
Note (3):
A fainter magnitude if the star is variable, in which case the bright
magnitude is given in Vmag. A "p" indicates that the magnitude is
photographic.
Note (4): the "+" indicates an additional note by Brian Skiff
(October 2003)
Note (5):
The Revised MK system has been described by Keenan (1987PASP...99..713K 1987PASP...99..713K).
For the best-determined types, that can serve as standards, has been
published by Keenan and Yorka (1988BICDS..35...37K 1988BICDS..35...37K). The types were
determined visually from the instruments listed in Table 1:
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Observatory Telescope Spectrograph Scale
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Perkins 0.8 meter Meinel 85 A/mm
Lowell 1.8 Boller & Chivens 77
Cerro Tololo 1.5 Hiltner 78
Las Campanas 0.6 Garrison 68
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In the Catalog the temperature types are generally given to a quarter
of a subclass (e.g., K0, K0+, K0.5, K1-, K1), but when not all the
decimal divisions of a class are counted as a subclass (as in type G).
The full subclasses that we use are the following: G0, G2, G5, G8, K0,
K1, K2, K3, K4, K5, M0, M1, M2, M3, M4, M5, M6, M7, M8.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Main identification of the star
14 A1 --- n_Note [+] note by Brian Skiff
15- 58 A44 --- Note Text of note
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Byte-by-byte Description of file: perkins.dat
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Bytes Format Units Label Explanations
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1-15 A15 --- Name The name or constellation letter of the star
17-21 A5 --- BSC The number in the Bright Star Catalogue
(= the HR number)
23-29 A7 --- HD The number in the Henry Draper Catalogue
32-33 I2 h RAh ? The Right Ascension in hours
for the year 2000
35-38 F4.1 min RAm ? Right Ascension in minutes
41 A1 --- DE- sign of the Declination for the year 2000
42-43 I2 deg DEd ? DEC in degrees
45-46 I2 arcmin DEm ? DEC in arcminutes
48-52 F5.2 mag Vmag ? One V magnitude for simple type star
53 A1 --- flag [:v] flag for Vmag
54-58 F5.2 mag Vmag2 ? Second V magnitude for the other star type
59 A1 --- n_Vmag2 [p:] additional note for V mag
60-99 A40 --- SpType MK spectral type
100 A1 --- rem [*] An asterisk (*) indicates a note.
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History:
* 16-Aug-1995: documentation prepared by C.-H. Joseph Lyu
[Hughes STX/NASA]
* 06-Jan-2006: positions and names verified and corrected by B. Skiff
(Lowell observatory); the latest edition (January 2000) was used.
References:
Giclas, H.L., Burnham, Jr., R., Thomas, N.G. 1958-80, Lowell Obs.
Bull. No. 69-166.
Gliese, W. 1969, Heidelberg Veroff., No. 22 (Cat. V/1)
Keenan, P.C. 1987PASP...99..713K 1987PASP...99..713K
Keenan, P.C., McNeil, R.C. 1976. An Atlas of Spectra of The Cooler
Stars: Types G, K, M, S, and C. Ohio State University Press.
Keenan, P.C., and Yorka, S.B. 1988, Bull. Inform. CDS No. 35, p. 37
(1988BICDS..35...37K 1988BICDS..35...37K)
Morgan, W.W., Keenan, P.C., Kellman, E. 1943. An Atlas of Stellar
Spectra. University of Chicago Press, Chicago.
Nicolet, B. 1978, Astr. Ap. Suppl., 34, 1. (978A&AS...34....1N,
see Cat. II/48)
Yamashita, Y., Nariai, K., Norimoto, Y. 1977. An Atlas of
Representative Stellar Spectra. University of Tokyo Press, Tokyo.
(End) Brian Skiff [Lowell Obs.], Francois Ochsenbein [CDS] 06-Jan-2006