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J/A+AS/119/271      Be stars uvbyβ photometry             (Fabregat+, 1996)
Be stars in open clusters. I. uvbyβ photometry.
     Fabregat J., Torrejon J.M., Reig P., Bernabeu G., Busquets J.,
     Marco A., Reglero V.
    <Astron. Astrophys. Suppl. Ser. 119, 271 (1996)>
    =1996A&AS..119..271F      (SIMBAD/NED BibCode)
ADC_Keywords: Stars, Be; Photometry, uvby, beta

Keywords: techniques: photometric - stars: emission-line, Be -
          open clusters and associations: general

Description:
    We present uvbyβ photometry for Be stars in eight open clusters
    and two OB associations. It is shown that Be stars occupy anomalous
    positions in the photometric diagrams, which can be explained in terms
    of the circumstellar continuum radiation contribution to the
    photometric indices. In the (b-y)0-MV plane Be stars appear redder
    than the non emission B stars, due to the additional reddening caused
    by the hydrogen free-bound and free-free recombination in the
    circumstellar envelope. In the c0-MV plane the earlier Be stars
    present lower c0 values than absorption-line B stars, which is
    caused by emission in the Balmer discontinuity, while the later Be
    stars deviate towards higher c0 values, indicating absorption in the
    Balmer discontinuity of circumstellar origin.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1           104       22   Catalogue of 22 observed stars
tab5-14          114       80   Photometric data for Be stars
table15          105       56   Photometric data for B stars not classified as Be
tables.tex        79      616   LaTeX version of tables


Byte-by-byte Description of file: table1

   Bytes Format Units   Label     Explanations

   2- 12  A11   ---     Name      Star name
  17- 21  F5.3  mag     Vmag      V magnitude
  24- 29  F6.3  mag     b-y       b-y color index
  32- 37  F6.3  mag     m1        m1 color index
  40- 45  F6.3  mag     c1        c1 color index
  47- 51  F5.3  mag     Hbeta     Hbeta color index
  53- 54  I2    ---     N         Number of measures
  56- 58  I3    mmag    e_Vmag    ? rms uncertainty on Vmag
  60- 62  I3    mmag    e_b-y     ? rms uncertainty on b-y
  64- 66  I3    mmag    e_m1      ? rms uncertainty on m1
  68- 70  I3    mmag    e_c1      ? rms uncertainty on c1
  72- 74  I3    mmag    e_Hbeta   ? rms uncertainty on Hbeta
  77- 80  I4    mmag    DVmag     Standard value minus transformed value
  83- 86  I4    mmag    Db-y      Standard value minus transformed value
  89- 92  I4    mmag    Dm1       Standard value minus transformed value
  95- 98  I4    mmag    Dc1       Standard value minus transformed value
 101-104  I4    mmag    DHbeta    ? standard value minus transformed value


Byte-by-byte Description of file: tab5-14 table15

   Bytes Format Units   Label     Explanations

   1- 13  A13   ---     Cluster   Open cluster or association name
  15- 18  I4    ---     No        Star number (1)
  20- 27  A8    ---     Name      HD or BD designation
      28  A1    ---     n_Name    Note on name (table13)
  29- 34  F6.3  mag     Vmag      V magnitude
  36- 41  F6.3  mag     b-y       b-y color index
  43- 48  F6.3  mag     m1        m1 color index
  50- 55  F6.3  mag     c1        c1 color index
  57- 61  F5.3  mag     Hbeta     Hbeta color index
  63- 67  F5.3  mag     e_Vmag    ? rms uncertainty on Vmag
  69- 73  F5.3  mag     e_b-y     ? rms uncertainty on b-y
  75- 79  F5.3  mag     e_m1      ? rms uncertainty on m1
  81- 85  F5.3  mag     e_c1      ? rms uncertainty on c1
  87- 91  F5.3  mag     e_Hbeta   ? rms uncertainty on Hbeta
  93- 94  I2    ---     N         Number of individual measurements
  96- 97  I2    ---     Ref       ? References (only for tab5-14) (2)
  99-101  A3    ---     Note      [*1-4 ,] Notes (3)

Note (1):  the following designations were taken:
     h and chi Per: star number from Oosterhoff (1937AnLei..17a...1O)
     NGC 663: star number from Wallenquist (1929MeUpp..42.....W)
     Pleiades: star number from Hertzsprung (1947AnLei..19....3H)
     alpha Per: star number from Heckmann et al. (1956AN....283..109H)
     Orion OB1: star number from Warren and Hesser (1977ApJS...34..115W)
     NGC 2323: star number from Cuffey (1941ApJ....94...55C)
     NGC 2422: star number from Schewick (1966VeBon..74....1V)
     NGC 6611: star number from Walker (1961ApJ...133..438W)
     NGC 7654: star number from Lundby (1946UppAn...1j...1L)
     Cepheus OB3: star number from Blaauw et al. (1959ApJ...130...69)
Note (2): the numbers refer to the following references:
      1.- Wackerling (1970MmRAS..73..153W)
      2.- Hardorp et al., (1965), Catalogue III/76
      3.- Slettebak (1968ApJ...154..933S)
      4.- Fabregat et al., (1994, Be Star News. 29, 8)
      5.- Schild & Romanishin (1976ApJ...204..493S)
      6.- Gonzalez & Gonzalez (1954BOTT....1i...3G)
      7.- Slettebak (1985ApJS...59..769S)
      8.- Merrill & Burwell (1943ApJ....98..153M)
      9.- Merrill & Burwell (1933ApJ....78...87M)
     10.- Schild (1965ApJ...141..979S)
     11.- Merrill & Burwell (1949ApJ...110..387M)
     12.- Sanduleak & Bidelman (1980PASP...92...72S)
     13.- Coyne et al. (1978VatOP...1..257C)
     14.- Sanduleak (1990AJ....100.1239S)
     15.- Dolidze (1975, Bull. Abastumani Astrophys. Obs. 47, 3)
     16.- Bidelman (1976IAUS...70..457B)
     17.- Irvine (1975ApJ...196..773I)
     18.- Morgan et al. (1995ApJS....2...41M)
     19.- Lesh (1968ApJS...17..371L)
     20.- Bartkus (1964VilOB..13...29B)
     21.- MacConnell (1961A&AS...44..387M)
     22.- Dworetski (1976AJ.....80..131D)
     23.- Walker (1961ApJ...133..438W)
     24.- Hiltner (1956ApJS....2..389H)
     25.- Bond (1973PASP...85..405B)
     26.- Blaauw et al. (1959ApJ...130...69B)
Note (3): The following symbols are used in the notes:
      *: Possible non-members (tab5-14)
      1: Used as standard (table15)
      2: Nonmember of the cluster or association (table15)
      3: Chemically peculiar star (Ap or Am, Renson 1988A&AS...76..127R)
         (table15)
      4: Variable star IL Cephei. Herbig Ae/Be star. (table15)


References:
  Bartkus R. 1964, Bull. Vilnius Astr. Obs. 13, 29  (1964VilOB..13...29B)
  Bidelman W.P. =1976IAUS...70..457B
  Blaauw A., Hiltner W.A., Johnson H.L. =1959ApJ...130...69B
  Bond H.E.  =1973PASP...85..405B
  Coyne G.V. et al., 1978, Publ. Vatican Obs.  1, 257. (1978VatOP...1..257C)
  Cuffey J. =1941ApJ....94...55C
  Dolidze M.V. 1975, Bull. Abastumani Astrophys. Obs. 47, 3
  Dworetski M.M. =1976AJ.....80..131D
  Fabregat J., Torrejon J.M., Bernabeu G. 1994b, Be Star News. 29, 8
  Gonzalez et al., 1954, Bol. Obs. Tonantz. Tacub. 9, 3  (1954BOTT....1i...3G)
  Hardorp J., Theile I., Voight H.H. 1965   =Catalogue III/76
  Heckmann O. et al., 1956, Astr. Nachr. 283, 109    (1956AN....283..109H)
  Hertzsprung E. 1947, Ann. Sterrewatch Leiden 19, 3 (1947AnLei..19....3H)
  Hiltner W.A. =1956ApJS....2..389H
  Irvine N.J.  =1975ApJ...196..773I
  Lesh J.R.    =1968ApJS...17..371L
  Lundby A. 1946, Uppsala Astr. Obs. Ann. 1, 10 (1946UppAn...1j...1L)
  MacConnell D.J. =1981A&AS...44..387M
  Merrill P.W., Burwell C.G. =1933ApJ....78...87M
  Merrill P.W., Burwell C.G. =1943ApJ....98..153M
  Merrill P.W., Burwell C.G. =1949ApJ...110..387M
  Morgan W.W., Code A.D., Withford A.E. =1955ApJS....2...41M
  Oosterhoff P.T., 1937, Ann. Sterrewatch Leiden 17, 1 (1937AnLei..17a...1O)
  Renson P. 1988, =1988A&AS...76..127R
  Sanduleak N. =1990AJ....100.1239S
  Sanduleak N., Bidelman W.P. =1980PASP...92...72S
  Schewick H. 1966, Veroff. Astr. Inst. Bonn, 74 (1966VeBon..74....1V)
  Schild R.E. =1965ApJ...141..979S
  Schild R.E., Romanishin W. =1976ApJ...204..493S
  Slettebak A. =1968ApJ...154..933S
  Slettebak A. =1985ApJS...59..769S
  Wackerling L.R. 1970, Mem. R.A.S. 73, 153 (1970MmRAS..73..153W)
  Walker M.F. =1961ApJ...133..438W
  Wallenquist A. 1929, Medd. Astr. Obs. Uppsala 42 (1929MeUpp..42.....W)
  Warren W.H., Hesser J.E. =1977ApJS...34..115W
(End)                                        Patricia Bauer  [CDS]   07-May-1996