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J/AJ/106/2058            Karle observations of V505 Sgr  (Chambliss+, 1993)

A photometric investigation of the eclipsing binary V505 Sagittarii. Chambliss C.R., Walker R.L., Karle J.H., Snodgrass H.B., Vracko Y.A. <Astron. J. 106, 2058 (1993)> =1993AJ....106.2058C
ADC_Keywords: Binaries, eclipsing ; Stars, variable Abstract: V505 Sgr is a classical Algol system consisting of an A2 V primary and a G5 IV secondary that fills its Roche lobe. New times of minimum light are presented. The period of the eclipsing system (1.18287d) varies, due in part to an orbital light-time effect. A third component has been detected that orbits the eclipsing pair. This investigation uses the SIMPLEX algorithm [Kallrath & Linnell, ApJ, 313, 346 (1987)] and the Differential Correction code [Wilson, ApJ, 234, 1054 (1979)] to analyze two separate datasets. The results indicate the third component, an F8 V star, contributes about 5% of the light to the system. The minimum projected distance between the third component and the eclipsing pair is 37 AU. This implies an orbital period of about 105 years, a value that differs with the O-C data. The photometric solution, combined with recent spectroscopic data, yields R(1)=2.14R(Sun) and R(2)=2.24R(Sun) and M(1)=2.20M(Sun) and M(2)=1.15M(Sun). Description: Karle observations of V505 Sgr The table contains a listing of 1074 observations of V505 Sagittarii which were made by Karle during 29 nights in 1960 and 1961 with a 25-cm reflector at the Lewis and Clark College in Portland, Oregon. An RCA 1P21 photomultiplier was used, and the comparison star was HD 187664. The observations were unfiltered, and C.R. Chambliss and R.L. Walker have estimated the effective wavelength to be 4600A. These observations were not corrected for differential extinction. The reductions for time and for delta-magnitude were made by Yura Vracko in 1990. Karle observed nine times of primary minimum light and one time of secondary minimum. These were determined by Chambliss and Walker using the method of Kwee and van Woerden (1956), and they are listed in the printed paper. A least squares solution for these times of minimum light yielded the following ephemeris: T(min) = JD 2437108.8818 + 1.1828637 E. This ephemeris has been used to calculate the phases and phase angles which appear in this table. Objects: ----------------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------------- 19 53 06.3 -14 36 08 V505 Sgr = HD 187949 = HR 7571 ----------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table 38 1077 Karle observations of V505 Sgr
Byte-by-byte Description of file: table
Bytes Format Units Label Explanations
1- 12 F12.4 d HJD Heliocentric Julian Date 15- 21 F7.5 --- Phase [0/1[ Phase 24- 30 F7.3 deg Angle [0/360[ Phase angle 33- 38 F6.3 mag Delta Delta magnitude
Origin: AAS CD-ROM series, Volume 1, 1993
(End) [CDS] 21-Feb-1996
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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