Access to Astronomical Catalogues

J/A+A/345/505   UBVI magnitudes of NGC 869 B-type pulsators (Krzesinski+, 1999)
B-type pulsators in the central region of NGC 869 (h Persei)
       Krzesinski J., Pigulski A., Kolaczkowski Z.
      <Astron. Astrophys. 345, 505 (1999)>
      =1999A&A...345..505K
ADC_Keywords: Binaries, eclipsing ; Stars, B-type ; Photometry, UBVRI

Keywords: stars: binaries: eclipsing - stars: oscillations -
          stars: variables: general -
          Galaxy: open clusters and associations: individual: NGC 869 = h Per

Abstract:
    In the course of the search for B-type pulsators in the central region
    of h Persei, we discovered two β Cephei stars, Oo692 and Oo992,
    and one SPB star, Oo893. The first two stars are monoperiodic
    pulsators with periods of 0.1716946 and 0.1326359 d respectively, and
    semi-amplitudes smaller than 0.01mag. The light curve of Oo893 can be
    described by a single 1.193633-day period, slightly non-sinusoidal in
    shape, and having semi-amplitudes from 19 mmag in I to 48 mmag in U.
    Oo893 is the first SPB star found in h and χ Persei. In addition,
    we discovered seven other variables, including three eclipsing
    binaries and one λ Eri star. One of the binaries is a
    W UMa-type star and a likely cluster member. We also present new UBV
    photometry for 258 stars in the field. The average reddening,
    estimated from the cluster colour-colour diagram, amounts to
    E(B-V)=0.52mag. A 0.1mag dispersion of reddenings within the cluster
    is also seen.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table4.dat       105      311   UBV photometry of stars in h Persei
curves/*          22       10   Individual UBVI light curves


See also:
   J/A+A/325/987 : UBV magnitude of NGC 884 B-type pulsators (Krzesinski+ 1997)


Byte-by-byte Description of file: table4.dat

   Bytes Format Units   Label     Explanations

   1-  5  F5.1  pix     Xpos      X position (1)
   7- 11  F5.1  pix     Ypos      Y position (1)
  13- 16  I4    ---     OO        ? Oosterhoff (1937AnLei..17a...1O) number
                                    (NGC 869 NNNN in Simbad)
  18- 20  I3    ---     W         ? Wildey (1964ApJS....8..439W) number
                                    (Cl* NGC 869 W NNNa in Simbad)
  21- 22  A2    ---     m_W       [ab :] Multiplicity index or uncertainty flag
                                          on W
  24- 28  I5    ---     MV        ? Moffat & Vogt (1974VeBoc...2....1M) number
                                     (Cl* NGC 869 MV  NNNNN in Simbad)
      29  A1    ---     m_MV      [ABCD] Multiplicity index on MV
      30  A1    ---     u_MV      Uncertainty flag on MV
  32- 37  F6.3  mag     Vmag      ? V magnitude
  39- 43  F5.3  mag     B-V       ? B-V colour index
  45- 47  A3    ---     r_B-V     Reference to BV photometry (2)
      49  A1    ---     n_B-V     [I] I: BV photometry transformed with the use
                                          of I-filter measurements
  51- 55  F5.3  mag     U-B       ? U-B colour index
      57  I1    h       RAh       Right ascension (J2000.0)
  59- 60  I2    min     RAm       Right ascension (J2000.0)
  62- 66  F5.2  s       RAs       Right ascension (J2000.0)
      68  A1    ---     DE-       Declination sign (J2000.0)
  69- 70  I2    deg     DEd       Declination (J2000.0)
  72- 73  I2    arcmin  DEm       Declination (J2000.0)
  75- 78  F4.1  arcsec  DEs       Declination (J2000.0)
  80- 94  A15   ---     Rem       Remarks
  96-105  A10   ---     VarFile   Name of the File containing light curves in
                                   subdirectory curves

Note (1): 1pix∼0.15', see figure 1.

Note (2): S: star was observed from Suhora only
          B: star was observed from Bialkow only
        S+B: star was observed form Suhora and Bialkow


Byte-by-byte Description of file: curves/*

   Bytes Format Units   Label     Explanations

       1  A1    ---     Filter    [UBVI] Filter
   3- 14  F12.4 d       HJD       Heliocentric Julian date
  16- 22  F7.4  mag     Dmag      Differential magnitude in Filter band


Acknowledgements: Andrzej Pigulski 


History:
  * 15-Nov-2001: In the light curves (files curves/*) the HJD was corrected
    following a message by the author (Jurek Krzesinski, ):
    the HJD had been incorrectly interpretated (too early by 600days)
  * 28-Feb-2002: the first digit of the Wildey number, omitted, was replaced.
  * 27-Aug-2002: the multiplicity letter for unresolved multiples was modified:
    it is now A, B, C, D, according to decreasing brightness (from authors)
(End)                                          Patricia Bauer [CDS]  22-Apr-1999