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J/AJ/117/2511       Speckle interferometry at USNO. III       (Germain+, 1999)

Speckle interferometry at the US Naval Observatory. III. Germain M.E., Douglass G.G., Worley C.E. <Astron. J. 117, 2511 (1999)> =1999AJ....117.2511G
ADC_Keywords: Stars, double and multiple ; Interferometry ; Magnitudes Keywords: binaries: general - binaries: visual - techniques: interferometric Abstract: Position angles and separations resulting from 2578 speckle interferometric observations of 590 binary stars are tabulated. This is the third in a series of papers presenting measures obtained using the 66 cm refractor at the US Naval Observatory in Washington, DC, and covers the period from 1995 June through 1996 December. Program stars range in separation from 0.2" to 4.3", with a limiting magnitude of V=11. Random errors are estimated to be 17.0mas in separation and 0.56°/ρ in position angle, where ρ is the separation in arcseconds. These are the first results acquired using an improved intensified CCD detector. The new detector, in concert with an intensity-filtering technique applied in software, has permitted a 1mag increase in dynamic range, to 3.5mag, for pairs separated by about 2". The instrumentation and calibration are briefly described, with an emphasis on the characteristics of the new detector. The software filter used to increase the dynamic range is also described. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 62 2587 USNO speckle interferometry data III
See also: J/AJ/117/1905 : Speckle interferometry at the USNO. II. (Germain+, 1999) J/AJ/118/1395 : Speckle interferometry at USNO. IV. (Douglass+, 1999) J/AJ/119/3071 : Speckle interferometry at USNO. V. (Douglass+, 2000) J/AJ/120/1120 : Speckle interferometry at USNO. VI. (Mason+, 2000) J/AJ/122/1586 : Speckle interferometry at USNO. VII. (Mason+, 2001) J/AJ/124/2254 : Speckle interferometry at USNO. VIII. (Mason+, 2002) J/AJ/120/2638 : CCD speckle obs. of binary stars. II. (Horch+, 2000) J/AJ/127/539 : Speckle interferometry at USNO. IX. (Mason+, 2004) J/AJ/128/3012 : Speckle interferometry at USNO. X. (Mason+, 2004) J/AJ/131/2687 : Speckle interferometry at USNO. XI. (Mason+, 2004) J/AJ/132/2219 : Speckle interferometry at USNO. XII (Mason+, 2006) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 10 A10 --- WDS WDS designation (based on equinox J2000) 12- 25 A14 --- Name Discovery name 27- 30 F4.1 mag Vmag V magnitude 32- 35 F4.1 mag Bmag B magnitude 37- 44 F8.3 yr Date ? Observation date 46- 50 F5.1 deg PA ? Position angle 52- 55 F4.2 arcsec rho ? Separation angle 57- 58 I2 --- M ? Microscopic objective used (1) 60 A1 --- F [Vgy] Filter (2) 62 A1 --- Q [GFPV] Quality of the parabolic fit (3)
Note (1): 10-power, 18-power or 20-power Note (2): Filter characteristics ------------------------------------------------------- Filter lambda half-width Magnitude range (V) Å Å ------------------------------------------------------- V (Johnson) 5450 850 8.3-11: "g" (USNO) 5600 450 7.3-9.5 y (Stromgren) 5500 240 ≤ 8.3 ------------------------------------------------------- Note (3): G: good fit with most of the points lying on the x and y parabolas F: fair fit with at least three points lying on the parabolas P: poor fit with points scattered about the parabolas V: very poor fit with large scatter about the parabolas and a weak and fuzzy secondary image
History: From AJ electronic version References: Douglass et al., Paper I 1997ApJS..111..289D Germain et al., Paper II 1999AJ....117.1905G, Cat. J/AJ/117/1905 Douglass et al., Paper IV 1999AJ....118.1395D, Cat. J/AJ/118/1395 Douglass et al., Paper V 2000AJ....119.3071D, Cat. J/AJ/119/3071 Mason et al., Paper VI 2000AJ....120.1120M, Cat. J/AJ/120/1120 Mason et al., Paper VII 2001AJ....122.1586M, Cat. J/AJ/122/1586 Mason et al., Paper VIII 2001AJ....124.2254M, Cat. J/AJ/124/2254 Mason et al., Paper IX 2004AJ....127..539M, Cat. J/AJ/127/539 Mason et al., Paper X 2004AJ....128.3012M, Cat. J/AJ/128/3012 Mason et al., Paper XI 2006AJ....131.2687M, Cat. J/AJ/131/2687 Mason et al., Paper XII 2006AJ....132.2219M, Cat. J/AJ/132/2219 Mason et al., Paper XIII 2007AJ....134.1671M, Cat. J/AJ/134/1671 Mason et al., Paper XIV 2008AJ....136.2223M, Cat. J/AJ/136/2223 Mason et al., Paper XV 2010AJ....140..480M, Cat. J/AJ/140/480 Mason et al., Paper XVI 2011AJ....141..157M, Cat. J/AJ/141/157 Mason et al., Paper XVII 2011AJ....142...46M, Cat. J/AJ/142/46 Mason et al., Paper XVIII 2012AJ....143..124M, Cat. J/AJ/143/124 Mason et al., Paper XIX 2013AJ....146...56M, Cat. J/AJ/146/56 Hartkopf et al., Paper XX 2015AJ....150..136H, Cat. J/AJ/150/136 Mason et al., Paper XXI 2017AJ....153...20M, Cat. J/AJ/153/20
(End) James Marcout, Patricia Bauer [CDS] 03-Aug-1999
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