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J/ApJ/684/635     New low-mass eclipsing binary from SDSS-II      (Blake+, 2008)
A new low-mass eclipsing binary from SDSS-II.
    Blake C.H., Torres G., Bloom J.S., Gaudi B.S.
   <Astrophys. J., 684, 635-643 (2008)>
   =2008ApJ...684..635B
ADC_Keywords: Binaries, eclipsing ; Photometry, infrared

Keywords: binaries: eclipsing - stars: low-mass, brown dwarfs


Abstract:
    We present observations of a new low-mass, double-lined eclipsing
    binary system discovered using repeat observations of the celestial
    equator from the Sloan Digital Sky Survey II. Using near-infrared
    photometry and optical spectroscopy we have measured the properties of
    this short-period [P=0.407037(14)days] system and its two components.
    We find the following parameters for the two components:
    M1=0.272±0.020M☉, R1=0.268±0.010R☉,
    M2=0.240±0.022M☉, R2=0.248±0.0090R☉,
    T1=3320±130K, and T2=3300±130K. The masses and radii of the
    two components of this system agree well with theoretical expectations
    based on models of low-mass stars, within the admittedly large errors.

Description:
    The SDSS-II Supernova Survey (Frieman et al., 2008AJ....135..338F)
    repeatedly observes about 300deg2 of sky centered around the
    celestial equator. We downloaded all of the imaging data from i band
    and the corresponding pipeline outputs available as of 2006 April.
Objects:
    ---------------------------------------------------------------
       RA  (2000)  DE     Designation(s)
    ---------------------------------------------------------------
    03 18 23.9 -01 00 18  NAME SDSS-MEB-1 = 2MASS J03182386-0100183
    ---------------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        28     2402   NIR photometry of SDSS-MEB-1


See also:
   http://www.sdss.org/drsn1/DRSN1_data_release.html : SDSS-II SN survey home
                                                       page


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

   Bytes Format Units   Label     Explanations

   1- 12  F12.4 d       HJD       Heliocentric Julian Date
  14- 15  A2    ---     Band      Filter band (H, J or Ks)
  17- 22  F6.3  mag     mag       Observed magnitude in Band
  24- 28  F5.3  mag     e_mag     The 1σ error in mag


History:
    From electronic version of the journal
(End)                 Greg Schwarz [AAS], Emmanuelle Perret [CDS]    06-Dec-2010