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 2009PAZh...35..592A
=2009AstL...35..534A 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:
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RA (2000) DE Designation(s)
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20 11 56.06 +20 20 04.4 FG Sge = PN G060.3-07.3
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File Summary:
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FileName Lrecl Records Explanations
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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
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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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
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Table3: The most reliable times of V-band maxima and minima for FG Sge in
1990-2007
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Year JD e_JD V Note
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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
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(End) Veta Avedisova [INASAN] 09-Dec-2009