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J/A+A/329/579       uvby photometry of theta CrB (Fabregat+ 1998)
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uvby photometry of theta Coronae Borealis during 1994 and 1995
       Fabregat J., Adelman S.J.
      <Astron. Astrophys. 329, 579 (1998)>
      =1998A&A...329..579F      (SIMBAD/NED BibCode)
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ADC_Keywords: Stars, Be ; Photometry, uvby
Keywords: stars: emission-line, Be - stars: individual: theta CrB

Abstract:
    We present differential uvby photometry of {theta} CrB obtained in
    1994 and 1995, complemented by Balmer line spectroscopy. This star has
    been constant during this period, showing no short term periodic
    variability with an amplitude greater than 0.005mag., nor long term
    variations greater than 0.01mag. The lack of variability is associated
    with an inactive phase of the Be star, in which no emission features
    are present in the spectra. The only remarkable event observed was a
    fading episode on JD 2449779, with an amplitude of about 0.02
    magnitudes in all bandpasses and duration of 0.2-0.3 days.

Objects:
    ----------------------------------------------------------
       RA   (2000)   DE    Designation(s)
    ----------------------------------------------------------
    15 32 55.8 +31 21 33   theta CrB = HD 138749 = HR 5778
    ----------------------------------------------------------

File Summary:
------------------------------------------------------------------------
 FileName     Lrec   Records   Explanations
------------------------------------------------------------------------
ReadMe          80         .   This file
table2aa.dat    43        47   CAM photometry, v-c data
table2ab.dat    43        21   CAM photometry, c-ch data
table2b.dat    152       219   FCAPT photometry, all data
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Byte-by-byte Description of file: table2aa.dat table2ab.dat
------------------------------------------------------------------------
   Bytes  Format  Units   Label    Explanations
------------------------------------------------------------------------
   1- 11  F11.3    d      HJD      Julian date
  12- 19  F8.3     mag    Dymag    Differential magnitude, y filter
  20- 27  F8.3     mag    Dbmag    Differential magnitude, b filter
  28- 35  F8.3     mag    Dvmag    Differential magnitude, v filter
  36- 43  F8.3     mag    Dumag    Differential magnitude, u filter
------------------------------------------------------------------------

Byte-by-byte Description of file: table2b.dat
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   Bytes  Format  Units   Label    Explanations
------------------------------------------------------------------------
   1- 12  F12.4    d      HJDu     Julian date for the u filter data
  13- 20  F8.3     mag    Du(v-c)  v-c differential magnitude, u filter
  21- 28  F8.3     mag    Du(v-ch) v-ch differential magnitude, u filter
  29- 36  F8.3     mag    Du(c-ch) ? c-ch differential magnitude, u filter
  39- 50  F12.4    d      HJDv     Julian date for the v filter data
  51- 58  F8.3     mag    Dv(v-c)  v-c differential magnitude, v filter
  59- 66  F8.3     mag    Dv(v-ch) v-ch differential magnitude, v filter
  67- 74  F8.3     mag    Dv(c-ch) c-ch differential magnitude, v filter
  77- 88  F12.4    d      HJDb     Julian date for the b filter data
  89- 96  F8.3     mag    Db(v-c)  v-c differential magnitude, b filter
  97-104  F8.3     mag    Db(v-ch) v-ch differential magnitude, b filter
 105-112  F8.3     mag    Db(c-ch) c-ch differential magnitude, b filter
 115-126  F12.4    d      HJDy     Julian date for the y filter data
 127-134  F8.3     mag    Dy(v-c)  v-c differential magnitude, y filter
 135-142  F8.3     mag    Dy(v-ch) v-ch differential magnitude, y filter
 143-150  F8.3     mag    Dy(c-ch) c-ch differential magnitude, y filter
------------------------------------------------------------------------

Acknowledgements: Juan Fabregat <juan@pleione.matapl.uv.es>
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(End)                                          Patricia Bauer [CDS]  02-Dec-1997