Access to Astronomical Catalogues

J/AJ/139/2026       TAOS variable stars                      (Mondal+, 2010)
The Taiwanese-American Occultation Survey project stellar variability.
II. Detection of 15 variable stars.
    Mondal S., Lin C.C., Chen W.P., Zhang Z.-W., Alcock C., Axelrod T.,
    Bianco F.B., Byun Y.-I., Coehlo N.K., Cook K.H., Dave R., Kim D.-W.,
    King S.-K., Lee T., Lehner M.J., Lin H.-C., Marshall S.L., Protopapas P.,
    Rice J.A., Schwamb M.E., Wang J.-H., Wang S.-Y., Wen C.-Y.
   <Astron. J., 139, 2026-2033 (2010)>
   =2010AJ....139.2026M
ADC_Keywords: Stars, variable ; Photometry

Keywords: methods: data analysis - stars: imaging - stars: variables: Cepheids -
          stars: variables: delta Scuti - stars: variables: general -
          stars: variables: RR Lyrae - surveys

Abstract:
    The Taiwanese-American Occultation Survey (TAOS) project has collected
    more than a billion photometric measurements since 2005 January. These
    sky survey data-covering timescales from a fraction of a second to a
    few hundred days-are a useful source to study stellar variability. A
    total of 167 star fields, mostly along the ecliptic plane, have been
    selected for photometric monitoring with the TAOS telescopes. This
    paper presents our initial analysis of a search for periodic variable
    stars from the time-series TAOS data on one particular TAOS field, No.
    151 (RA=17:30:6.7, DE=27:27:30, J2000), which had been observed over
    47 epochs in 2005. A total of 81 candidate variables are identified in
    the 3deg2 field, with magnitudes in the range 8<R<16. On the
    basis of the periodicity and shape of the light curves, 29 variables,
    15 of which were previously unknown, are classified as RR Lyrae,
    Cepheid, delta Scuti, SX Phonencis, semi-regular, and eclipsing
    binaries.

Description:
    The TAOS telescope system consists of an array of four 50cm, fast
    optics (f/1.9), wide-field robotic telescopes, sited at Lulin
    Observatory (longitude 120°52'25"E; latitude 23°28'07"N,
    elevation 2862m) in central Taiwan.

    TAOS images are obtained with a filter close (but not identical) to
    the standard R optical band.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat       123       18   Known variable stars
table2.dat        84       15   Previously unknown variables
table3.dat        53       29   Catalog for variable stars


See also:
   I/284 : The USNO-B1.0 Catalog (Monet+ 2003)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label    Explanations

   1- 12  A12   ---     USNO     USNO-B1.0 designation
  14- 39  A26   ---     Name     Star Name
  41- 46  F6.3  mag     Vmag     ? V magnitude or upper value of V magnitude
                                   interval
      47  A1    ---     ---      [-]
  48- 52  F5.2  mag     Vmagl    ? Lower value of V magnitude interval
  53- 57  F5.3  mag     Vamp     ? Amplitude in V (or R, see n_Vamp) band
  59- 60  A2    ---     n_Vamp   [R1 ] when R1 instead of V in magnitude
  62- 66  F5.2  mag     mag.u    ? Upper value of TAOS magnitude interval
      67  A1    ---     ---      [-]
  68- 72  F5.2  mag     mag.l    ? Lower value of TAOS magnitude interval
  74- 75  I2    --      Nf       ? Number of observed frames
  77- 82  F6.4  mag     e_mag    ? rms in TAOS magnitude
  84- 88  A5    ---     SpT      MK spectral type
  90- 96  F7.5  s       Per      ?=- Known period
      97  A1    ---     l_PerLS  [~] Limit flag on PerLS
  98-106  F9.5  s       PerLS    ?=- Period determined with Least Squares method
     108  A1    ---     l_Per04  [~] Limit flag on PerLS
 109-117  F9.5  s       Per04    ?=- Period determined with Period04 method
 119-123  F5.3  mag     Amp      ? Semi-amplitude of variation


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

   Bytes Format Units   Label     Explanations

   1-  4  A4    ---     ---       [TAOS]
   6- 11  A6    ---     TAOS      TAOS designation (NNN-NN)
  13- 23  F11.7 deg     RAdeg     Right ascension in decimal degrees (J2000)
  25- 35  F11.7 deg     DEdeg     Declination in decimal degrees (J2000)
  37- 48  A12   ---     USNO      USNO ID
  50- 55  F6.3  mag     mag       Calibrated TAOS magnitude
  57- 61  F5.3  mag     e_mag     Error on TAOSmag
  63- 68  F6.4  mag     rms       Magnitude rms of the light curve
  70- 71  I2    ---     Nf        [84/93] Number of observations used
                                          in the analysis
  73- 78  F6.3  d       Per       Derived period
  80- 84  A5    ---     Class     Variable classification (1)

Note (1): variable classification on the basis of the shape of light
     curves, periods, and semi-amplitudes.


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label     Explanations

       1  A1    ---     Note      [KU] Known or Unknown variables
   3- 14  F12.7 ---     USNO      USNO-B1.0 designation
  16- 20  F5.3  arcsec  DDiff     Offset from TAOS observation
  22- 26  F5.2  mag     B2mag     ?=- USNO B2 magnitude
  28- 32  F5.2  mag     R2mag     USNO R2 magnitude
  34- 39  F6.3  mag     Jmag      2MASS J magnitude
  41- 46  F6.3  mag     Hmag      2MASS H magnitude
  48- 53  F6.3  mag     Ksmag     2MASS Ks magnitude


History:
    From electronic version of the journal

References:
    Lehner et al.,  Paper I,  2009PASP..121..138L
(End)                                      Patricia Vannier [CDS]    28-May-2012