Access to Astronomical Catalogues

← Click to display the menu
J/AJ/127/3553  JHK photometry and spectroscopy for L and T dwarfs (Knapp+, 2004)

Near-infrared photometry and spectroscopy of L and T dwarfs: the effects of temperature, clouds, and gravity. Knapp G.R., Leggett S.K., Fan X., Marley M.S., Geballe T.R., Golimowski D.A., Finkbeiner D., Gunn J.E., Hennawi J., Ivezic Z., Lupton R.H., Schlegel D.J., Strauss M.A., Tsvetanov Z.I., Chiu K., Hoversten E.A., Glazebrook K., Zheng W., Hendrickson M., Williams C.C., Uomoto A., Vrba F.J., Henden A.A., Luginbuhl C.B., Guetter H.H., Munn J.A., Canzian B., Schneider D.P., Brinkmann J. <Astron. J., 127, 3553-3578 (2004)> =2004AJ....127.3553K
ADC_Keywords: Stars, dwarfs ; Stars, late-type; Photometry, infrared ; Spectroscopy Keywords: infrared: stars - stars: fundamental parameters - stars: late-type stars: low-mass, brown dwarfs Abstract: We present new JHK photometry on the MKO-NIR (Mauna Kea Observatories Near-Infrared) system and JHK spectroscopy for a large sample of L and T dwarfs. Photometry has been obtained for 71 dwarfs, and spectroscopy for 56. The sample comprises newly identified very red objects from the Sloan Digital Sky Survey (SDSS, and known dwarfs from the SDSS and the Two Micron All Sky Survey (2MASS, Cat. II/246). Spectral classification has been carried out using four previously defined indices from Geballe et al. (2002ApJ...564..466G) that measure the strengths of the near infrared water and methane bands. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 50 51 New confirmed late-M, L, and T dwarfs from SDSS table3.dat 94 76 New MKO-NIR JHK photometry table9.dat 96 111 Magnitudes and colors, sorted by infrared spectral type
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 25 A25 --- Name Object designation 27 A1 --- f_Name [ab] Flag on Name (1) 29- 33 F5.2 mag imag SDSS i band magnitude (2) 35- 38 F4.2 mag e_imag Error in imag 40- 44 F5.2 mag zmag SDSS z band magnitude (2) 46- 49 F4.2 mag e_zmag Error in zmag
Note (1): Flag on Name, defined as follows: a = Optical spectroscopy given by Hawley et al. (2002, Cat. J/AJ/123/3409) b = Discovered in the 2MASS database by Cruz et al. (2003, Cat. J/AJ/126/2421). Note (2): The SDSS asinh magnitudes (Lupton et al. 1999AJ....118.1406L) corresponding to zero flux are i=24.4 and z=22.8.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 25 A25 --- Name Object designation 27- 44 A18 --- TName Truncated designation 46- 50 F5.2 mag Jmag MKO J band magnitude 52- 55 F4.2 mag e_Jmag Error in Jmag 57- 61 F5.2 mag Hmag MKO H band magnitude 63- 66 F4.2 mag e_Hmag Error in Hmag 68- 72 F5.2 mag Kmag MKO K band magnitude 74- 77 F4.2 mag e_Kmag Error in Kmag 79- 88 A10 "YYYY/MM/DD" ObsDate Date of observation 90- 94 A5 --- Camera Camera used in observation
Byte-by-byte Description of file: table9.dat
Bytes Format Units Label Explanations
1- 25 A25 --- Name Object designation 27- 29 A3 --- f_Name Flag on Name (1) 31- 42 A12 --- SpType Spectral type (2) 44 A1 --- f_SpType [cdko] Flag on SpType (3) 46- 50 F5.2 mag JMAG ? Absolute MKO J band magnitude 52- 55 F4.2 mag i-z ? SDSS (i-z) color index 57- 61 F5.2 mag zmag ? SDSS z band magnitude 63- 66 F4.2 mag z-J ? The (z-J) color index 68- 71 F4.2 mag Z-J ? The (Z-J) color index (4) 73- 77 F5.2 mag Jmag Apparent MKO J band magnitude 79- 83 F5.2 mag J-K MKO (J-K) color index 85- 89 F5.2 mag J-H MKO (J-H) color index 91- 95 F5.2 mag H-K MKO (H-K) color index
Note (1): Flag on Name, defined as follows: b = JHK magnitudes synthesized from flux calibrated spectrum. e = 2MASS J0028+1501 may be variable at the 5% level; measured J/H/K of: 16.5(0.03)/15.42(0.03)/14.63(0.05) on 2000/11/19, 16.65(0.05)/15.56(0.05)/14.57(0.05) on 2001/01/14, 16.45(0.03)/15.54(0.03)/14.51(0.03) on 2001/11/24, and 16.44(0.03)/15.44(0.03)/14.53(0.03) on 2002/01/08. f = DENIS-P J1058.7-1548 = 2MASS J10584787-1548172. g = GD 165B = 2MASS J14243909+0917104. h = Kelu-1 = 2MASS J13054019-2541059. i = LHS 102B = 2MASS J00043484-4044058. j = SDSS J2249+0044 may be variable at the 10% level; measured J/H/K of: 16.58(0.03)/15.39(0.03)/14.46(0.03) on 2000/11/19, 16.46(0.05)/15.42(0.05)/14.43(0.05) on 2001/01/16, and 16.36(0.03)/15.30(0.03)/14.38(0.03) on 2002/01/08. l = DENIS-P J0205.4-1159AB = 2MASS J02052940-1159296AB. m = DENIS-P J1228.2-1547AB = 2MASS J12281523-1547342AB. n = 2MASS J15232263+3014562 = Gl 584C. p = ZJHK magnitudes synthesized from flux calibrated spectrum. q = Gl 570D = 2MASS J14571496-2121477. Note (2): Spectral types in square brackets estimated from colors. Note (3): Flag on SpType, defined as follows: c = Spectral type from Kirkpatrick et al. (2000AJ....120..447K). d = Optical spectral type later than infrared type by >1 subclass. k = Optical spectral type earlier than infrared type by >1 subclass. o = Spectral type from Burgasser et al. (2002, Cat. J/ApJ/564/421) or typed by us from Burgasser et al. data. Note (4): Where Z is on the UKIRT (United Kingdom Infra-Red Telescope) UFTI (UKIRT Fast-Track Imager) system.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 11-May-2005
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

catalogue service