J/ApJ/651/502 Spitzer IRAC photometry of M, L, and T dwarfs (Patten+, 2006)
Spitzer IRAC photometry of M, L, and T dwarfs.
Patten B.M., Stauffer J.R., Burrows A., Marengo M., Hora J.L., Luhman K.L.,
Sonnett S.M., Henry T.J., Raghavan D., Megeath S.T., Liebert J., Fazio G.G.
<Astrophys. J., 651, 502-516 (2006)>
=2006ApJ...651..502P 2006ApJ...651..502P
ADC_Keywords: Stars, dwarfs ; Stars, late-type ; Photometry, infrared
Keywords: infrared: stars - stars: fundamental parameters - stars: late-type -
stars: low-mass, brown dwarfs
Abstract:
We present the results of a program to acquire photometry for 86 late
M, L, and T dwarfs using the Infrared Array Camera (IRAC) on the
Spitzer Space Telescope. We examine the behavior of these cool dwarfs
in various color-color and color-magnitude diagrams composed of
near-IR and IRAC data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 110 86 Sample of late-type M, L, and T dwarfs: basic data
table3.dat 108 86 IRAC photometry and colors of late-type M, L, and
T dwarfs
refs.dat 76 41 References
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See also:
J/A+A/326/249 : Chromospheric models of dwarf M stars (Mauas+ 1997)
J/A+A/331/581 : Rotation and activity in field M dwarfs (Delfosse+ 1998)
J/A+A/380/590 : 30 DENIS late-M dwarfs between 15 and 30pc (Phan-Bao+, 2001)
J/ApJ/564/421 : Spectra of T dwarfs. I. (Burgasser+, 2002)
J/AJ/123/3409 : SDSS M, L, and T dwarfs (Hawley+, 2002)
J/A+A/401/959 : 35 DENIS late-M dwarfs between 10 and 30pc (Phan-Bao+, 2003)
J/A+A/439/1137 : PHOENIX model chromospheres of M dwarfs (Fuhrmeister+, 2005)
J/AJ/126/2487 : T dwarfs in the southern hemisphere (Burgasser+, 2003)
J/AJ/127/3553 : L and T dwarfs JHK photometry & spectroscopy (Knapp+, 2004)
J/AJ/130/1871 : Spectroscopic survey of M dwarfs (Bochanski+, 2005)
J/other/ARA+A/43.195 : L and T dwarf stars (Kirkpatrick, 2005)
J/AJ/131/2722 : New L and T dwarfs from the SDSS (Chiu+, 2006)
J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)
J/AJ/132/891 : Binaries among nearby L dwarfs (Reid+, 2006)
J/ApJ/637/1067 : T dwarfs near-IR spectral classification (Burgasser+, 2006)
J/MNRAS/383/831 : New DENIS nearby L and late-M dwarfs (Phan-Bao+, 2008)
J/PASP/118/659 : RI photometry of 2MASS late M and L dwarfs (Liebert+, 2006)
J/ApJ/648/629 : Radio obs. of late M, L, and T dwarfs (Berger+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Star name
17 A1 --- n_Name [b] b: known binary
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 28 F4.1 s RAs Right ascension (J2000)
30 A1 --- DE- Declination sign (J2000)
31- 32 I2 deg DEd Declination (J2000)
34- 35 I2 arcmin DEm Declination (J2000)
37- 38 I2 arcsec DEs Declination (J2000)
40- 48 A9 --- SpT MK spectral type (1)
50- 51 I2 --- r_SpT Spectral type reference, in refs.dat file
53- 59 F7.5 arcsec plx ? Parallax
61- 67 F7.5 arcsec e_plx ? rms uncertainty on plx
69- 70 I2 --- r_plx ? Parallax reference, in refs.dat file
72- 76 F5.2 mag Jmag J magnitude
78- 81 F4.2 mag e_Jmag rms uncertainty on Jmag
83- 87 F5.2 mag Hmag H magnitude
89- 92 F4.2 mag e_Hmag rms uncertainty on Hmag
94- 98 F5.2 mag Ksmag Ks magnitude
100-103 F4.2 mag e_Ksmag rms uncertainty on Ksmag
105-106 I2 --- r_Jmag JHK reference, in refs.dat file
108-110 A3 --- Syst Photometry system (2)
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Note (1): Unless otherwise noted, optical spectral types are used for M and
L dwarfs, and infrared spectral types are used for the T dwarfs.
Note (2): Photometry system as follows:
2MA = 2MASS (Cat. II/246)
MKO = MKO, Tokunaga et al., 2002PASP..114..180T 2002PASP..114..180T
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Star name
17 A1 --- n_Name [b] b: known binary
19- 27 A9 --- SpT MK spectral type
29- 33 F5.2 mag [3.6] IRAC 3.6um magnitude
35- 38 F4.2 mag e_[3.6] rms uncertainty on [3.6]
40- 41 I2 --- o_[3.6] Number of observations in 3.6um
43- 47 F5.2 mag [4.5] IRAC 4.5um magnitude
49- 52 F4.2 mag e_[4.5] rms uncertainty on [4.5]
54- 55 I2 --- o_[4.5] Number of observations in 4.5um
57- 61 F5.2 mag [5.8] IRAC 5.8um magnitude
63- 66 F4.2 mag e_[5.8] rms uncertainty on [5.8]
68- 69 I2 --- o_[5.8] Number of observations in 5.8um
71- 75 F5.2 mag [8.0] IRAC 8.0um magnitude
77- 80 F4.2 mag e_[8.0] rms uncertainty on [8.0]
82- 83 I2 --- o_[8.0] Number of observations in 8.0um
85- 89 F5.2 mag [3.6]-[4.5] IRAC [3.6]-[4.5] colour index
91- 95 F5.2 mag [4.5]-[5.8] IRAC [4.5]-[5.8] colour index
97-100 F4.2 mag [5.8]-[8.0] IRAC [5.8]-[8.0] colour index
102-108 A7 --- Notes Notes (1)
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Note (1): Notes as follows:
1 = Source saturated in all four IRAC channels in 30s FRAMETIME data;
2s FRAMETIME data used instead
2 = GTO program PID 33 target; 2s FRAMETIME data
3 = GTO program PID 33 target; 0.6s FRAMETIME data
4 = Channel 1 saturated for 30s FRAMETIME data; used 2s FRAMETIME
data for this channel
5 = Channel 2 saturated for 30s FRAMETIME data; used 2s FRAMETIME
data for this channel
6 = GTO program PID 33 target
7 = Target source aperture possibly contaminated by flux from
another nearby source
8 = Target in crowded field; some contamination of source aperture by
other nearby sources possible
9 = Spitzer AOR target name incorrectly reads 2MA 1410+1804
10 = Wings of GJ 1001 PSF may contaminate source aperture for target;
however, 2s FRAMETIME data for channels 1 and 2 agree well with
the 30s FRAMETIME data
11 = Strong nebulosity in background, especially in channel 4
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference code
4- 22 A19 --- BibCode BibCode
24- 43 A20 --- Aut Authot's name
47- 76 A30 --- Com Comments
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 22-Jul-2008