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J/ApJ/637/1067  Near-IR spectral classification of T dwarfs   (Burgasser+, 2006)

A unified near-infrared spectral classification scheme for T dwarfs. Burgasser A.J., Geballe T.R., Leggett S.K., Kirkpatrick J.D., Golimowski D.A. <Astrophys. J., 637, 1067-1093 (2006)> =2006ApJ...637.1067B
ADC_Keywords: Stars, dwarfs ; Infrared sources ; Spectral types Keywords: stars: fundamental parameters - stars: low-mass, brown dwarfs Abstract: A revised near-infrared classification scheme for T dwarfs is presented, based on and superseding prior schemes developed by Burgasser and coworkers (2002ApJ...564..421B) and Geballe and coworkers (2002ApJ...564..466G), and defined following the precepts of the MK process. Drawing from two large spectroscopic libraries of T dwarfs identified largely in the Sloan Digital Sky Survey and the Two Micron All Sky Survey, nine primary spectral standards and five alternate standards spanning spectral types T0-T8 are identified that match criteria of spectral character, brightness, absence of a resolved companion, and accessibility from both the Northern and Southern Hemispheres. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table13.dat 65 61 Comparison of T dwarf spectral types table14.dat 173 69 T Dwarf compendium refs.dat 112 51 References
See also: J/AJ/127/3553 : JHK photometry and spectroscopy for L and T dwarfs (Knapp+, 2004) J/ApJ/564/421 : Spectra of T dwarfs. I. (Burgasser+, 2002) J/AJ/126/2487 : T dwarfs in the southern hemisphere (Burgasser+, 2003) Byte-by-byte Description of file: table13.dat
Bytes Format Units Label Explanations
1- 17 A17 --- OName Truncated name 19- 44 A26 --- Name Object name 46- 49 A4 --- SpType New spectral type 50 A1 --- u_SpType [:p] Uncertainty flag on SpType (1) 52- 55 A4 --- SpType2 Spectral type from Burgasser et al. (2000ApJ...531L..57B) 56 A1 --- u_SpType2 [:p] Uncertainty flag on SpType2 (1) 58- 61 A4 --- SpType3 Spectral type from Geballe et al. (2002ApJ...564..466G) 63- 65 F3.1 --- e_SpType3 ? Error in SpType3
Note (1): Uncertainty flag defined as follows: : = uncertain classification p = peculiar source
Byte-by-byte Description of file: table14.dat
Bytes Format Units Label Explanations
1- 26 A26 --- Name Object Name (1) 28 A1 --- r_pos Reference for the position 30- 31 I2 h RAh Hour of Right Ascension (J2000) 33- 34 I2 min RAm Minute of Right Ascension (J2000) 36- 40 F5.2 s RAs Second of Right Ascension (J2000) 42 A1 --- DE- Sign of the Declination (J2000) 43- 44 I2 deg DEd Degree of Declination (J2000) 46- 47 I2 arcmin DEm Arcminute of Declination (J2000) 49- 52 F4.1 arcsec DEs Arcsecond of Declination (J2000) 54- 60 F7.2 yr Epoch Epoch of position measurement 62 A1 --- u_SpType Uncertainty flag on SpType 63- 67 A5 --- SpType Spectral type from Burgasser et al. (2005) 70 A1 --- r_zmag Reference for zmag (2) 72- 76 F5.2 mag zmag ? The SDSS z (AB) magnitude 78- 81 F4.2 mag e_zmag ? Uncertainty in zmag 83 A1 --- r_Jmag Flag on Jmag 85- 89 F5.2 mag Jmag The 2MASS J magnitude 91- 94 F4.2 mag e_Jmag ? Uncertainty in Jmag 96 A1 --- r_Hmag Flag on Hmag 98-102 F5.2 mag Hmag ? The 2MASS H magnitude 104-107 F4.2 mag e_Hmag ? Uncertainty in Hmag 109 A1 --- r_Ksmag Flag on Ksmag 110 A1 --- l_Ksmag [>] Upper limit flag on Ksmag 111-115 F5.2 mag Ksmag ? The 2MASS Ks magnitude 117-120 F4.2 mag e_Ksmag ? Uncertainty in Ksmag 122 A1 --- r_plx Reference for plx 124-129 F6.4 arcsec plx ? Parallax 131-136 F6.4 arcsec e_plx ? Uncertainty in plx 138 A1 --- r_pm Reference for pm 140-145 F6.4 arcsec/yr pm ? Proper motion 147-152 F6.4 arcsec/yr e_pm ? Uncertainty in pm 154-156 I3 deg pmPA ? Proper motion angle E from N 158-173 A16 --- Refs Discovery and measurement references
Note (1): Gliese 377CD is a misprint for Gliese 337CD. Note (2): A "4" indicates z photometry from SDSS DR 4 (Cat. II/267), otherwise z photometry is as reported from the literature (Leggett et al. 2000ApJ...536L..35L; Geballe et al., 2002ApJ...564..466G ; Knapp et al., 2004AJ....127.3553K).
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 4 A4 --- Ref Reference code 6- 24 A19 --- Bibcode Bibcode 26- 58 A33 --- Aut Author's name 59-112 A54 --- Com Comment
History: * 14-Mar-2007: From electronic version of the journal * 10-Sep-2007: Name 2MASS J1217110-0311131 corrected into 2MASS J12171110-0311131 (table 14) * 13-Apr-2012: Name "GJ 377CD" correctzed into "GJ 337CD" (table14)
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 14-Mar-2007
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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