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J/AJ/131/2687       Speckle interferometry at USNO. XI       (Mason+, 2006)

Speckle interferometry at the US naval observatory. XI. Mason B.D., Hartkopf W.I., Wycoff G.L., Rafferty T.J. <Astron. J., 131, 2687-2694 (2006)> =2006AJ....131.2687M
ADC_Keywords: Stars, double and multiple Keywords: binaries: general - binaries: visual - techniques: interferometric Abstract: The results of 1683 speckle interferometric observations of double stars, made with the 26 inch (66 cm) refractor of the US Naval Observatory, are presented. Each speckle interferometric observation of a system represents a combination of over 2000 short-exposure images. These observations are averaged into 805 mean relative positions and range in separation from 0.23" to 43.34", with a median separation of 4.33". This is the 11th in a series of papers presenting measurements obtained with this system and covers the period 2004 January 4-December 30. Included in these data are two older measurements whose positions were previously deemed possibly aberrant but are no longer classified this way following a confirming observation. Two of these systems have new orbital elements, which are also presented here. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 57 702 Speckle Interferometric Measurements of Double Stars table2.dat 44 7 Binaries not found table3.dat 127 116 Speckle Interferometric Measurements and Residuals to Systems with Orbits
See also: J/AJ/117/1905 : Speckle interferometry at USNO. II. (Germain+, 1999) J/AJ/117/2511 : Speckle interferometry at USNO. III (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/127/539 : Speckle interferometry at USNO. IX. (Mason+, 2004) J/AJ/128/3012 : Speckle interferometry at USNO. X. (Mason+, 2004) J/AJ/132/2219 : Speckle interferometry at USNO. XII. (Mason+, 2004) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- WDS WDS name (HHMMm+DDMM, J2000) 13- 19 A7 --- Disc Discoverer designation 21- 24 A4 --- Comp Additional system components 26- 33 F8.3 yr Epoch Epoch of observation 35- 39 F5.1 deg PA Position angle 40 A1 --- u_PA [:] Uncertainty flag for PA 42- 46 F5.2 arcsec Sep Separation 47 A1 --- u_Sep [:] Uncertainty flag for Sep 49 I1 --- o_Sep Number of observations contained in the mean 51- 57 A7 --- Note Object notes (1)
Note (1): Object notes as follows: C = Confirming Observation L = Linear elements determined. See Hartkopf et al. (2007AJ....134.1671M) a = Large change in separation and/or angle of position b = Much better measure than the uncertain one of Mason et al. (2001, Cat. J/AJ/122/1586) N = 50-184 : Number of years since last measure
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 10 A10 --- WDS WDS name (HHMMm+DDMM, J2000) 12- 19 A8 --- Disc Discoverer designation 21- 24 I4 yr Date Date 26- 28 I3 deg PA Published position angle 30- 32 F3.1 arcsec Sep Published separation 34- 37 F4.1 mag mag1 Published primary magnitude 39- 42 F4.1 mag mag2 Published secondary magnitude 44 A1 --- Note [1] Inaccurate position (1)
Note (1): 1 = Only arcminute coordinates are available for this pair, resolved by Herschel (1833, MmRAS, 6, 1), although he could "not define it. Night not good; telescopes give double images." Probably an erroneous detection.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 10 A10 --- WDS WDS name (HHMMm+DDMM, J2000) 13- 20 A8 --- Disc Discoverer designation 22- 25 A4 --- Comp Additional system components 27- 34 F8.3 yr Epoch ? Epoch of observation 36- 40 F5.1 deg PA ? Position angle 42- 45 F4.2 arcsec Sep ? Separation 47- 48 I2 --- o_Sep ? Number of observations contained in the mean 50- 53 F4.1 deg d(PA) The O-C position angle residual 55- 59 F5.2 arcsec d(Sep) The O-C separation residual 61- 63 A3 --- n_Ref Notes on Ref (1) 65-127 A63 --- Ref Observation reference
Note (1): Notes as follows: * = System used in characterizing errors. 1 = This orbit might possibly be fit better with linear elements. See Hartkopf et al. (2007AJ....134.1671M). 2 = This measure was inconsistent with previous measures, so not included in Mason et al. (2004, Cat. J/AJ/127/539). However, available data are deemed insufficient for a new orbital calculation at this time. 3 = This system was expected to show significant motion over the calendar year, so multiple observations have been obtained. 4 = The new orbit is listed in Table 4, ephemerides based on these elements are listed in Table 6, and the orbit is illustrated in Figure 2. 5 = This orbit calculates the opposite quadrant for the position angle, however, it is clearly in this quadrant with an obvious Δm of ∼1.5.
History: From electronic version of the journal 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 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 2002AJ....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 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
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 25-Sep-2008
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