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J/PAZh/35/592   Photometry of FG Sge at the ejection state    (Arkhipova+, 2009)
FG Sge at the stage of dust shell ejection.
    Arkhipova V.P., Esipov V.F., Ikonnikova N.P., Komissarova G.V.,
    Shugarov S.Yu.
   <Pis'ma Astron. Zh. 35, 592 (2009)>
   =2009PAZh...35..592A
   =2009AstL...35..534A
ADC_Keywords: Stars, supergiant; Photometry, UBV; Spectroscopy


Abstract:
    New photometric observations of the variable star FG Sge, a rapidly
    evolving planetary nebula nucleus, were performed in 2003-2008. On
    230 nights, we obtained 86 UBV and 155 BVRI (or Rc, Ic) magnitude
    estimates. The maximum amplitude of the V-band light variations was
    >8mag. Six deep minima and four high maxima were observed.
Objects:
    ---------------------------------------------------
       RA   (2000)   DE       Designation(s)
    ---------------------------------------------------
    20 11 56.06  +20 20 04.4  FG Sge = PN G060.3-07.3
    ---------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        44       86   Photometric observations of FG Sge in 2003-2007
table2.dat        56      154   CCD observations of FG Sge in 2002-2008


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1-  7  I7    d       JD        Julian date
  10- 14  F5.2  mag     Vmag      Johnson V magnitude
  17- 21  F5.2  mag     Bmag      ? Johnson B magnitude
  24- 28  F5.2  mag     Umag      ? Johnson U magnitude
  31- 34  F4.2  mag     B-V       ? Johnson B-V color index
  37- 40  F4.2  mag     U-B       ? Johnson U-B color index
  43- 44  I2    arcsec  Aper      Photometer aperture using in measurements


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1-  7  I7    d       JD        Julian date
  10- 14  F5.2  mag     Bmag      ? Johnson B magnitude
  17- 21  F5.2  mag     Vmag      ? Johnson V magnitude
  24- 28  F5.2  mag     Rmag      ? Johnson R magnitude
  31- 35  F5.2  mag     Imag      ? Johnson I magnitude
  38- 42  F5.2  mag     Rcmag     ? Cousins Rc magnitude
  45- 49  F5.2  mag     Icmag     ? Cousins Ic magnitude
  52- 56  A5    ---     Camera    Camera & Telescope


Table3: The most reliable times of V-band maxima and minima for FG Sge in
          1990-2007
    --------------------------------
    Year    JD     e_JD   V    Note
    --------------------------------
    1990  2448087  1     9.23  min
    1992  2448916  5    13.7   min
    1993  2449151  1    11.59  min
    1993  2449250  5    11.0   min
    1994  2449489  1    13.7   min
    1994  2449548  1    11.80  max
    1994  2449608  3    13.9   min
    1995  2449839  3    12.6   min
    1997  2450641  1     9.95  min
    1997  2450731  5     9.44  max
    1999  2451410  5    10.1   max
    2000  2451483  3    15.6   min
    2000  2451752  1     9.6   max
    2000  2451820  3    10.54  min
    2003  2452823  5    18.16  min
    2004  2453193  1    10.65  max
    2004  2453270  1    11.12  min
    2004  2453307  2    10.21  max
    2005  2453630  2    14.63  max
    2006  2454036  5    13.5   max
    2007  2454218  5    11.60  max
    -------------------------------
(End)                                      Veta Avedisova [INASAN]   09-Dec-2009