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J/A+AS/111/41       Photometry of magnetic CP stars               (North+, 1995)
Stroemgren and Geneva photometry of the magnetic CP stars 56 Tauri, HD 111133,
HD 126515 and HD 215441.
    North P., Adelman S.J.
   <Astron. Astrophys. Suppl. Ser. 111, 41 (1995)>
   =1995A&AS..111...41N
ADC_Keywords: Stars, Ap; Stars, peculiar; Photometry, uvby; Photometry, Geneva

Keywords: stars: individual: HD 27309, HD 111133, HD 126515, HD 215441 -
          stars: chemically peculiar - stars: rotation

Description:
   Photometry in the Stroemgren and Geneva systems is used to improve the
   ephemerides of the magnetic CP stars 56 Tau, HD 111133, HD 126515 and
   HD 215441.
Objects:
    ----------------------------------------------------------
       RA   (2000)   DE    Designation(s)
    ----------------------------------------------------------
    04 19 36.7 +21 46 25   HD 27309 = V724 Tau 
    12 47 02.3 +05 57 01   HD 111133 = EP Vir 
    14 25 55.9 +00 59 34   HD 126515 = FF Vir
    22 44 07.5 +55 35 21   HD 215441 = GL Lac 
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
gen.dat           85       60   Geneva photometry
hd27309.dat       85       89  *Photometry of HD 27309
hd111133.dat      86      286  *Photometry of HD 111133
ubvy.dat          52      312   Differential uvby photometry

Note on hd27309.dat: The photometry is from literature and from us:
   V(lit.), differential y magnitudes and all-sky Geneva magnitudes 
   and colours.
Note on hd111133.dat: The photometry is from Wolff & Wolff (1972) and
    from us (differential U,B,V and v,b,y magnitudes, and all-sky Geneva
    magnitudes and colours). The UBV and <vb> magnitudes are corrected 
    for offsets as described in the paper.


See also:
  J/A+A/324/137  : Eclipsing binaries with candidate CP stars (North+ 1997)
  J/A+AS/103/1   : 63 And, HD 192913, HR 8240 & 108 Aqr (Adelman+ 1994)
  J/A+AS/106/333 : Alpha And, HD 184905, HR 8216 & HR 8434 (Adelman+ 1994)
  J/A+AS/114/253 : HD 11187, HD 14940, HD 15144, 20 Eri, HR 8933 (Adelman+ 1995)
  J/PASP/109/9   : HR 1643, Theta Aur, 49 Cam, and HR 3724 (Adelman 1997)
  J/A+AS/122/249 : HD32633, 25 Sex, HR 7224, and HD 200311 (Adelman, 1997)
  J/A+A/329/579  : uvby photometry of theta CrB (Fabregat+ 1998)
  J/A+AS/123/445 : uvby photometry of metallic + Hg-Mn stars (Adelman 1997)
  J/A+AS/125/65  : HD 37776, HR 2258, HR 6958 & 108 Aqu (Adelman, 1997)
  J/A+AS/125/497 : Theta Vir and 109 Vir uvby photometry (Adelman 1997)
  J/A+AS/128/245 : AR Aur, 3 Hya, 49 Cnc & BX Boo (Adelman 1997)
  J/A+A/333/952  : BVRI photometry of HR 1105
  J/A+AS/134/53  : HD 15980, HR 1094, 33 Gem, and HD 115708 (Adelman 1998)
  J/A+AS/136/111 : HD 35298, 19 Lyr, HD 192678 and HR 8216 (Adelman+ 1999)
  J/A+AS/136/379 : 45 Leo, HR 4330, 49 Her and HR 6718 (Adelman+ 1999)
  J/A+AS/146/13  : 20 Eri, HR 1297, 12 CMa, and HD 134214 (Adelman, 2000)
  J/A+A/368/225  : HR 5341, HD 142070, HR 6967 & HR 8434 (Adelman, 2001)
  J/A+A/390/1023 : HR 194, HD 32966, HD 171782, and HR 7911 (Adelman+, 2002)
  J/A+A/401/357  : 60 Tau, HR 1528, HR 8216, HR 8770 (Adelman+, 2003)


Byte-by-byte Description of file: hd27309.dat hd111133.dat

   Bytes Format  Units  Label   Explanations

   1-  9  A9     ---    Name    Star name
  11- 21  F11.3  d      HJD     Heliocentric julian day
      25  I1     ---    Q       Photometric Q weight (Rufener 1988).
                                 Only valid for Geneva photometry
  29- 33  F5.3   mag    [V]     Magnitude in the visible (1)
      37  I1     ---    P       Photometric P weight (Rufener 1988).
                                 Only valid for Geneva photometry
  41- 45  F5.3   mag    [U-B]   Geneva [U-B] or  U-B(Johnson) index (2)
  49- 53  F5.3   mag    [V-B]   Geneva [V-B] or V-B(Johnson) or y-<vb> index (3)
  57- 61  F5.3   mag    [B1-B]  Geneva [B1-B] index, (0 for other photometries)
  65- 69  F5.3   mag    [B2-B]  Geneva [B2-B] index, (0 for other photometries)
  73- 77  F5.3   mag    [V1-B]  Geneva [V1-B] index, (0 for other photometries)
  81- 85  F5.3   mag    [G-B]   Geneva [G-B]  index, (0 for other photometries)

Note (1): The magnitude is Geneva [V], differential Stromgren y (dy+6.327
    for the dy data of Wolff & Wolff 1972, and dy+6.319 for our dy data)
    or Johnson V (dV+6.321 for our dV data).
Note (2): The index is Geneva [U-B] index, or Johnson's differential U-B
    index (zero for uvby photometry). U-B corrected by a constant so that
    U=V-(V-B)+(U-B) has the same zero point as Geneva [U] (offset of 6.881)
Note (3): The index is Geneva [V-B] index, or differential Johnson's
    V-B index or y-<vb>. V-B and y-<vb> corrected by a constant so that
    B=V-(V-B) and <vb≥y-(y-<vb>) have the same zero point as Geneva [B]
    (offsets of 5.347 and 5.351 respectively)


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

   Bytes Format  Units   Label    Explanations

   1-  9  A9     ---     Name     Star name
  11- 21  F11.3  d       HJD      Heliocentric julian day
      25  I1     ---     Q        photometric Q weight (Rufener 1988).
  29- 33  F5.3   mag     [V]      Magnitude in the visible: Geneva [V],
      37  I1     ---     P        photometric P weight (Rufener 1988).
  41- 45  F5.3   mag     [U-B]    Geneva [U-B] index
  49- 53  F5.3   mag     [V-B]    Geneva [V-B] index
  57- 61  F5.3   mag     [B1-B]   Geneva [B1-B] index
  65- 69  F5.3   mag     [B2-B]   Geneva [B2-B] index
  73- 77  F5.3   mag     [V1-B]   Geneva [V1-B] index
  81- 85  F5.3   mag     [G-B]    Geneva [G-B]  index


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

   Bytes Format  Units   Label    Explanations

   1-  9  A9     ---     Name     Star name
  11- 21  F11.3  d       HJD      Heliocentric julian day of the observation
  24- 29  F6.3   mag     umag     Differential u magnitude
  31- 36  F6.3   mag     vmag     Differential v magnitude
  38- 43  F6.3   mag     bmag     Differential b magnitude
  45- 50  F6.3   mag     ymag     Differential y magnitude
--------------------------------------------------------------------------------

Observations characteristics
-----------------------------------------------------------------------------
 File      Q  Nobs HJD         Star       Differential magnitude dm
-----------------------------------------------------------------------------
  h111     2  286  2440630.000   HD 111133  ---
  h27      2   89  2441313.000   HD 27309   ---
  gen      2   35  2441039.000   HD 126515  ---
  gen      2   25  2439350.000   HD 215441  ---
  ubvy     -   81  2448329.000   HD 111133  m(HD111133)-m(HD109860)
  ubvy     -  124  2448308.000   HD 126515  m(HD126515)-0.5[m(HR5418)+m(HR5368)]
  ubvy     -   73  2448411.000   HD 215441  m(HD15441)-m(HD215501)
  ubvy     -   34  2448532.000   HD 27309   m(HD27309)-0.5[m(HR1331)+m(HR1399)]
-----------------------------------------------------------------------------
   Q    : minimum Q weight (Rufener 1988) to consider the Geneva observation
          in the period determination. Dummy value of 3 attributed to our
          y measurements or the V ones from the literature.
   Nobs : Total number of measurements
   HJD  : Heliocentric Julian Date from which the data are taken into account
           (e.g. for period search).


References:
   Rufener F., 1988, "Catalogue of stars measured in the Geneva Observatory
       Photometric system", 4th Edition, Geneva Observatory
       (Catalogue II/169)
   Wolff S.C., Wolff R.J., 1972, ApJ 176, 433
(End)                                           Patricia Bauer [CDS] 12-Dec-1994