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J/A+A/448/1075   UBVRI photometry and polarimetry of DF Tau (Shakhovskoj+, 2006)
Photopolarimetric activity and circumstellar environment of the young binary
system DF Tau.
    Shakhovskoj D., Grinin V., Rostopchina, A., Schertl D., Hofmann K.-H.,
    Weigelt G., Balega Yu., Kiyaeva O., Melnikov S.
   <Astron. Astrophys. 448, 1075 (2006)>
   =2006A&A...448.1075S
ADC_Keywords: Stars, double and multiple ; Photometry, UBVRI ; Polarization

Keywords: techniques: photometric - stars: pre-main sequence  -
          techniques: interferometric - techniques: polarimetric  -
          binaries: general - stars: individual: DF Tau

Abstract:
    The results of multi-year photometric and polarimetric observations of
    the young binary system DF Tau in UBVRI bands as well as bispectrum
    speckle interferometric observations in the H and K bands are
    presented. The photometric and polarimetric observations suggest the
    linear poarization variation has substantially a stochastic character.

Description:
    Photometric and polarimetric observations of DF Tau were carried out
    between 1991 and 1998 using the five-band photopolarimeter mounted at
    the 1.25m telescope of the Crimean Astrophysical Observatory (CrAO).
    This instrument permits simultaneous observations of polarization and
    brightness in the U, B, V, R, and I bands. The effective wavelengths
    of the instrumental system are close to the standard wavelengths of
    the Johnson photometric system.
Objects:
    ----------------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ----------------------------------------------------------
    04 27 02.8   +25 42 22   DF Tau = HD 283654
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat       153       77   DF Tau photometric and polarimetric UBVRI
                              observations at CAO


See also:
  J/A+AS/101/485 : Multisite UBVRI photometry in Tau-Aur cloud (Bouvier+ 1993)
  J/A+A/327/145  : Photopolarimetric activity of RR Tauri  (Rostopchina+ 1997)


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

   Bytes Format Units   Label     Explanations

   1- 11  F11.3 d       JD        Julian date
  13- 18  F6.3  mag     Vmag      Johnson V magnitude
  20- 25  F6.3  mag     U-B       Johnson (U-B) color-index
  27- 31  F5.3  mag     B-V       Johnson (B-V) color-index
  33- 37  F5.3  mag     V-R       Johnson (V-R) color-index
  39- 43  F5.3  mag     V-I       Johnson (V-I) color-index
  45- 48  F4.2  %       P(U)      ? Degree of linear polarization in U band
  50- 53  F4.2  %       e_P(U)    ? Accuracy of polarization degree in U band
  55- 60  F6.2  deg     PA(U)     ? Position angle of polarization in U band
  62- 65  F4.2  deg     e_PA(U)   ? Accuracy of position angle in U band
  67- 70  F4.2  %       P(B)      ? Degree of linear polarization in B band
  72- 75  F4.2  %       e_P(B)    ? Accuracy of polarization degree in B band
  77- 82  F6.2  deg     PA(B)     ? Position angle of polarization in B band
  84- 87  F4.2  deg     e_PA(B)   ? Accuracy of position angle in B band
  89- 92  F4.2  %       P(V)      ? Degree of linear polarization in V band
  94- 97  F4.2  %       e_P(V)    ? Accuracy of polarization degree in V band
  99-104  F6.2  deg     PA(V)     ? Position angle of polarization in V band
 106-109  F4.2  deg     e_PA(V)   ? Accuracy of position angle in V band
 111-114  F4.2  %       P(R)      ? Degree of linear polarization in R band
 116-119  F4.2  %       e_P(R)    ? Accuracy of polarization degree in R band
 121-126  F6.2  deg     PA(R)     ? Position angle of polarization in R band
 128-131  F4.2  deg     e_PA(R)   ? Accuracy of position angle in R band
 133-136  F4.2  %       P(I)      ? Degree of linear polarization in I band
 138-141  F4.2  %       e_P(I)    ? Accuracy of polarization degree in I band
 143-148  F6.2  deg     PA(I)     ? Position angle of polarization in I band
 150-153  F4.2  deg     e_PA(I)   ? Accuracy of position angle in I band


Acknowledgements: Alla Rostopchina, arost(at)crao.crimea.ua

(End)                Alla Rostopchina [CAO], Patricia Vannier [CDS]  21-Nov-2005