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J/PAZh/33/679   UBV phot. and equivalent widths of V886 Her   (Arkhipova+, 2007)

Variability and rapid evolution of the protoplanetary object IRAS 18062+2410 = V886 Her. Arkhipova V.P., Esipov V.F., Ikonnikova N.P., Komissarova G.V., Noskova R.I. <Pis'ma Astron. Zh. 33, 604 (2007)> =2007PAZh...33..679A =2007AstL...33..604A
ADC_Keywords: Stars, supergiant; Photometry, UBV Abstract: We present our long-term photometric and spectroscopic observations of a high-latitude B supergiant with an infrared excess - the protoplanetary nebula IRAS 18062+2410. Our UBV observations in 2000-2006 have confirmed the rapid irregular photometric variability of the star with a maximum amplitude as high as 0.4m in V that we found previously. The B-V and U-B color indices vary with amplitudes as high as 0.10m and 0.25m, respectively, and show no clear correlation with the brightness. Our V-band CCD observations on 11 nights in 2006 have revealed brightness trends during the night. The variability of IRAS 18062+2410 is similar in pattern to the light variations in other hot post-AGB objects and some of the nuclei of young planetary nebulae. We assume that pulsations and a variable stellar wind can be responsible for the variability of these stars. In addition to the rapid variability, our 12-year-long observations have revealed a systematic decline in the mean brightness of IRAS 18062+2410. Objects: -------------------------------------------------------------------- RA (2000) DE Designation(s) -------------------------------------------------------------------- 18 08 20.086 +24 10 43.36 V886 Her = IRAS 18062+2410 = HD 341617 -------------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 46 220 UBV observations of IRAS18062+2410 in 2000-2006 table4.dat 23 40 Equivalent widths of Hβ, Hα, and [NII] 6584 lines
See also: J/PAZh/25/30 : UBV photometry of IRAS 18062+2410 (Arkhipova+, 1999) J/PAZh/26/705 : UBV observations of post-AGB supergiants (Arkhipova+, 2000) J/PAZh/27/187 : UBV observations of HD 179821 (Arkhipova+, 2001) J/PAZh/27/841 : UBV and line identification of V1853 Cyg (Arkhipova+, 2001) J/PAZh/29/858 : FG Sagittae: new observations (Arkhipova+, 2003) J/PAZh/30/297 : BVRI + fluxes if HM Sge in 1986-2000 (Arkhipova+, 2004) J/PAZh/30/855 : UBV light curves of IRAS 19200+3457 (Arkhipova+, 2004) J/PAZh/32/48 : UBV photometry of HD 331319 (Arkhipova+, 2006) J/PAZh/32/662 : Photometric Variability of HD 51585 (Arkhipova+, 2006) J/PAZh/32/737 : UBV light curve and spectroscopy of StHa62 (Arkhipova+, 2006) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 11 F11.3 d JD Julian date 13- 18 F6.3 mag Umag U magnitude 20- 25 F6.3 mag Bmag B magnitude 27- 32 F6.3 mag Vmag V magnitude 34- 39 F6.3 mag U-B U-B color index 41- 46 F6.3 mag B-V B-V color index
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 7 I7 d JD Julian date 10- 12 F3.1 0.1nm EW(Hb) ? Equivalent widths of Hβ 15- 18 F4.1 0.1nm EW(Ha) ? Equivalent widths of Hα 21- 23 F3.1 0.1nm EW(NII) ? Equivalent widths of [NII] 6584

(End) Veta Avedisova [INASAN] 30-Dec-2007
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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