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J/A+A/522/A112  i'z' photometry of L5 and later dwarf candidates  (Reyle+, 2010)
The ultracool-field dwarf luminosity-function and space density from the
Canada-France Brown Dwarf Survey.
    Reyle C., Delorme P., Willott C.J., Albert L., Delfosse X., Forveille T.,
    Artigau E., Malo L., Hill G.J., Doyon R.
   <Astron. Astrophys., 522, A112-112 (2010)>
   =2010A&A...522A.112R
ADC_Keywords: Stars, dwarfs ; Photometry

Keywords: stars: low-mass - brown dwarfs -
          stars: luminosity function, mass function - Galaxy: stellar content

Abstract:
    Thanks to recent and ongoing large scale surveys, hundreds of brown
    dwarfs have been discovered in the last decade. The Canada-France
    Brown Dwarf Survey is a wide-field survey for cool brown dwarfs
    conducted with the MegaCam camera on the Canada-France-Hawaii
    Telescope.

    Our objectives are to find ultracool brown dwarfs and to constrain the
    field brown-dwarf luminosity function and the mass function from a
    large and homogeneous sample of L and T dwarfs.

    We identify candidates in CFHT/MegaCam i' and z' images and follow
    them up with pointed near infrared (NIR) imaging on several
    telescopes. Halfway through our survey we found ∼50 T dwarfs and ∼170
    L or ultra cool M dwarfs drawn from a larger sample of 1400 candidates
    with typical ultracool dwarfs i'-z' colours, found in 780 square
    degrees.

Description:
    The brown dwarf sample is drawn from the CFBDS, a survey fully
    described in Delorme et al. (2008A&A...484..469D). The CFBDS is a
    survey in the i' and z' filters conducted with MegaCam at the CFHT.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        49       44   Synthetic colours computed on publicly
                              available spectra
table5.dat        92      103   Photometry of L5 and later dwarf candidates in
                              the MegaCam photometric system


See also:
 J/A+A/338/1066 : Optical Spectra of DENIS Brown Dwarf Candidate (Tinney+ 1998)
 J/ApJ/564/421  : Spectra of T dwarfs. I. (Burgasser+, 2002)
 J/A+A/400/891  : IZ photometry of Pleiades brown dwarfs (Moraux+, 2003)
 J/AJ/127/2856  : Brown dwarfs in the 2MASS Survey (Burgasser+, 2004)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1- 12  A12   ---     Name      Star name
  15- 19  A5    ---     SpT       MK spectral type
  23- 27  F5.2  mag     i'mag     CFHT/MegaCam i' magnitude
  29- 33  F5.2  mag     z'mag     CFHT/MegaCam z' magnitude
  35- 39  F5.2  mag     Jmag      Johnson J magnitude
  41- 44  F4.2  mag     i'-z'     CFHT/MegaCam i'-z' colour index
  46- 49  F4.2  mag     z'-J      CFHT/MegaCam-Johnson z'-J colour index


Byte-by-byte Description of file: table5.dat

   Bytes Format Units   Label     Explanations

   1-  2  I2    h       RAh       Right ascension (J2000)
   4-  5  I2    min     RAm       Right ascension (J2000)
   7- 11  F5.2  s       RAs       Right ascension (J2000)
      13  A1    ---     DE-       Declination sign (J2000)
  14- 15  I2    deg     DEd       Declination (J2000)
  17- 18  I2    arcmin  DEm       Declination (J2000)
  20- 24  F5.2  arcsec  DEs       Declination (J2000)
  26- 31  F6.3  mag     z'mag     CFHT/MegaCam z' magnitude
  33- 37  F5.3  mag     e_z'mag   rms uncertainty on z'mag
  39- 44  F6.3  mag     i'mag     ?=99.000 CFHT/MegaCam i' magnitude
  46- 50  F5.3  mag     e_i'mag   rms uncertainty on i'mag
      52  A1    ---     l_i'-z'   Limit flag on i'-z' (1)
  53- 57  F5.3  mag     i'-z'     CFHT/MegaCam i'-z' colour index
  59- 63  F5.3  mag     e_i'-z'   rms uncertainty on i'-z'
  65- 70  F6.3  mag     Jmag      Johnson J magnitude
  72- 76  F5.3  mag     e_Jmag    rms uncertainty on Jmag
  78- 82  F5.3  mag     z'-J      CFHT/MegaCam-Johnson  z'-J colour index
  84- 90  A7    ---     SpT       MK spectral class
      92  A1    ---     r_SpT     [abcd] References when spectral type (2)

Note (1): For objects without detection in the i'-band, a lower limit is
           given for the i'-z' colour.
Note (2): The spectral type is given for dwarfs with spectroscopic follow-up
     as follows:
   a = Warren et al. (2007MNRAS.381.1400W)
   b = Delorme et al. (2008A&A...482..961D)
   c = Chiu et al. (2006, Cat. J/AJ/131/2722)
   d = Knapp et al. (2004, Cat. J/AJ/127/3553)


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    04-Mar-2011