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J/AJ/140/319      BVR light curves of NGC 6026 and 6337       (Hillwig+, 2010)
Binary central stars of planetary nebulae discovered through photometric
variability. II. Modeling the central stars of NGC 6026 and NGC 6337.
    Hillwig T.C., Bond H.E., Afsar M., De Marco O.
   <Astron. J., 140, 319-327 (2010)>
   =2010AJ....140..319H
ADC_Keywords: Planetary nebulae ; Photometry, UBVRI

Keywords: binaries: close - planetary nebulae: individual (NGC 6026, NGC 6337)


Abstract:
    Close-binary central stars of planetary nebulae (CSPNe) provide an
    opportunity to explore the evolution of PNe, their shaping, and the
    evolution of binary systems undergoing a common-envelope phase. Here,
    we present the results of time-resolved photometry of the binary
    central stars (CSs) of the PNe NGC 6026 and NGC 6337 as well as
    time-resolved spectroscopy of the CS of NGC 6026. The results of a
    period analysis give an orbital period of 0.528086(4) days for NGC
    6026 and a photometric period of 0.1734742(5) days for NGC 6337.

Description:
    The photometric data consist of V-band CCD photometry obtained at the
    SMARTS 0.9m telescope7 located at Cerro Tololo Inter-American
    Observatory (CTIO) with the T2K Imager and B-, V-, and R-band
    photometry obtained at the CTIO 1.0m telescope with the SITe SI-502A
    512x512 pixel CCD imager.

    Spectroscopy of NGC 6026 was obtained at the SMARTS 1.5m telescope
    located at CTIO using the 831-lines/mm grating in second order with a
    range 4067-4749Å with a 3.6" slit.
Objects:
    ----------------------------------------------------------------------
       RA   (2000)   DE       Designation(s)              (Period)
    ----------------------------------------------------------------------
    16 01 21.13 -34 32 35.8   NGC 6026 = PN G341.6+13.7   (P=0.528086)
    17 22 15.66 -38 29 03.5   NGC 6337 = PN G349.3-01.1   (P=0.1734742)
    ----------------------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        80      257   Instrumental magnitudes of the central star
                              of NGC 6026
table2.dat        80       60   Instrumental magnitudes of the central star
                              of NGC 6337


See also:
   V/84 : Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Acker+, 1992)


Byte-by-byte Description of file: table?.dat

   Bytes Format Units   Label     Explanations

   1- 13  F13.5 d       B-HJD     ? B band obs. Heliocentric Julian Date
  15- 20  F6.3  mag     Bmag      ? B band instrumental magnitude
  22- 26  F5.3  mag     e_Bmag    ? The 1σ error in Bmag
  28- 40  F13.5 d       V-HJD     V band obs. Heliocentric Julian Date
  42- 47  F6.3  mag     Vmag      V band instrumental magnitude
  49- 53  F5.3  mag     e_Vmag    The 1σ error in Vmag
  55- 67  F13.5 d       R-HJD     ? R band obs. Heliocentric Julian Date
  69- 74  F6.3  mag     Rmag      ? R band instrumental magnitude
  76- 80  F5.3  mag     e_Rmag    ? The 1σ error in Rmag


History:
    From electronic version of the journal

References:
    De Marco et al., Paper I    2008AJ....136..323D
(End)                  Greg Schwarz [AAS], Patricia Vannier [CDS]    11-Jun-2012