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J/AJ/118/1395   Speckle interferometry at USNO. IV.          (Douglass+, 1999)

Speckle interferometry at the US naval observatory. IV. Douglass G.G., Mason B.D., Germain M.E., Worley C.E. <Astron. J. 118, 1395 (1999)> =1999AJ....118.1395D
ADC_Keywords: Stars, double and multiple ; Interferometry ; Magnitudes Keywords: binaries: general - binaries: visual - techniques: interferometric Abstract: The results of 1314 speckle interferometric observations of 625 binary stars, ranging in separation from 0.2" to 5.2" with a limiting secondary magnitude of V=11, are tabulated. These observations were obtained using the 66cm refractor at the US Naval Observatory in Washington, DC, with an intensified CCD detector. This is the fourth in a series of papers presenting measures obtained with this equipment and covers the period 1997 January 1 through December 31. Random errors for all measures are estimated to be 18mas in separation and 0.57°/ρ in position angle, where ρ is the separation in arcseconds. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 62 1313 USNO speckle interferometry data IV
See also: J/AJ/117/1905 : Speckle interferometry at the USNO. II. (Germain+, 1999) J/AJ/117/2511 : Speckle interferometry at USNO. III (Germain+, 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: table2.dat
Bytes Format Units Label Explanations
1- 10 A10 ---- WDS WDS designation (based on equinox J2000) 12- 20 A9 --- Name Discovery name 21- 24 A4 --- Comp Component 26- 29 F4.1 mag Vmag V magnitude 31- 34 F4.1 mag Bmag B magnitude 36- 43 F8.3 yr Date Obsevation date 45- 49 F5.1 deg PA Position angle 51- 54 F4.2 arcsec rho Separation angle 56- 57 I2 --- M Microscopic objective used (1) 59 A1 --- F [Vgy] Filter (2) 61 A1 --- Q [GFPVT] Quality of the parabolic fit (3)
Note (1): 10-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): the Qualities are flagged as follows: 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 T: not explained in the paper
History: From electronic AJ version * 05-Jan-2001: record #269, WDS name corrected from 07156-0156 to 07156-0152 References: Douglass et al., Paper I 1997ApJS..111..289D Germain et al., Paper II 1999AJ....117.1905G, Cat. J/AJ/117/1905 Germain et al., Paper III 1999AJ....117.2511G, Cat. J/AJ/117/2511 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] 25-Oct-1999
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