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. =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