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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
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). 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:
FileName Lrecl Records Explanations
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)
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
Bytes Format Units Label Explanations
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)
Note (1): Origin of the position in column rPos, defined as follows: B = Bordeaux meridian circle (2001A&A...376..325R, I/272) C = Carlsberg CMC11 (I/256) T = Tycho-2 (2000A&A...357..367H, I/259) U = UCAC1 (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). For the best-determined types, that can serve as standards, has been published by Keenan and Yorka (1988BICDS..35...37K). The types were determined visually from the instruments listed in Table 1: -------------------------------------------------------------- Observatory Telescope Spectrograph Scale -------------------------------------------------------------- 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 -------------------------------------------------------------- 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.
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Name Main identification of the star 14 A1 --- n_Note [+] note by Brian Skiff 15- 58 A44 --- Note Text of note
Byte-by-byte Description of file: perkins.dat
Bytes Format Units Label Explanations
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.
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 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) 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
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

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