J/AN/330/55 PISCO speckle observations in 2006 (Scardia+, 2009)
Speckle observations with PISCO in Merate:
VI. Astrometric measurements of visual binaries in 2006.
Scardia M., Prieur J.-L., Pansecchi L., Argyle R.W., Sala M.
<Astron. Nachrichten. 330, 55-67 (2009)>
=2009AN....330...55S 2009AN....330...55S
ADC_Keywords: Stars, double and multiple ; Interferometry
Keywords: astrometry - binaries: close - binaries: visual -
stars: individual (ADS 11479, ADS 11584, ADS 16538) -
techniques: interferometric
Abstract:
We present relative astrometric measurements of visual binaries made
during the second semester of 2006, with the speckle camera PISCO at
the 102cm Zeiss telescope of Brera Astronomical Observatory, in
Merate. Our sample contains orbital couples as well as binaries whose
motion is still uncertain. We obtained 175 new measurements of 169
objects, with angular separations in the range 0.1"-4.2", and an
average accuracy of 0.01". The mean error on the position angles is
0.6°. Most of the position angles could be determined without the
usual 180° ambiguity with the application of triple-correlation
techniques and/or by inspection of the long integration files.We also
present the new orbits we have computed for ADS 11479, 11584 and
16538, for which our measurements lead to large residuals and/or for
which the revision was justified by the significant number of
observations made since the last orbit computation.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 90 177 Measurements of visual binaries between July
and December 2006
table2.dat 75 67 Residuals of the measurements of Table 1 with
published orbits
refs.dat 68 49 References
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2011)
J/MNRAS/367/1170 : PISCO speckle observations in 2004 (Scardia+, 2006)
http://ad.usno.navy.mil/wds/obr6.html :
Sixth Catalogue of Orbits of Visual Binary Stars Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS name (HHMMm+DDMM)
12- 24 A13 --- Name Name
26- 30 I5 --- ADS ? ADS number
32- 39 F8.3 yr Epoch Epoch, in Besselian years
41 A1 --- Flt [RVW] Filter (not explicited in the paper)
43- 44 I2 mm f Focal length of the eye-piece used for
magnifying the image
46- 50 F5.3 arcsec rho ? Angular separation
52- 56 F5.3 arcsec e_rho ? rms uncertainty on rho
58- 62 F5.1 deg theta ? Position angle (1)
63 A1 --- n_theta [*] * indicates that the position angle could
be determined without the 180°
ambiguity
65- 67 F3.1 deg e_theta ? rms uncertainty on theta
69 I1 --- Orb [0/1] 1: object for which an orbit is known
71- 90 A20 --- Notes Notes
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Note (1): North corresponding to theta=0° and the East to theta=90°.
When the triple correlation files allowed us to resolve the 180°
ambiguity (see Sects. 2 and 3.1), an asterisk was added to indicate
that our determination is absolute. Otherwise, our angular
measurements were reduced to the quadrant reported in the "Fourth
Catalogue of Interferometric Measurements of Binary Stars" (Hartkopf
et al. 2008, http://ad.usno.navy.mil/wds/int4.html).
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- ADS ?=- ADS number
7- 19 A13 --- Name Name
21- 47 A27 --- RCode References code, in table2.dat file
48 A1 --- n_RCode [*] Note on RCode (1)
50- 57 F8.3 yr Epoch Epoch, in Besselian years
59- 63 F5.3 arcsec rho ? Observed angular separation
65- 69 F5.2 arcsec Drho ? Observed minus Computed angular separation
71- 74 F4.1 deg Dtheta ? Observed minus Computed position angle
75 A1 --- Note [Q] Q indicates discrepant quadrants between
our measurements and those orbits
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Note (1): An asterisk indicates that the references are reported as they
appear in the Sixth Catalog of Orbits of Hartkopf & Mason (2008).
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 27 A27 --- RCode Reference code, as in table1
29- 68 A40 --- Ref Reference
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History:
From electronic version of the journal
References:
Scardia et al., Paper I 2005MNRAS.357.1255S 2005MNRAS.357.1255S
Scardia et al., Paper II 2006MNRAS.367.1170S 2006MNRAS.367.1170S, Cat. J/MNRAS/367/1170
Scardia et al., Paper III 2007MNRAS.374..965S 2007MNRAS.374..965S
Scardia et al., Paper IV 2008AN....329...54S 2008AN....329...54S
Prieur et al., Paper V 2008MNRAS.387..772P 2008MNRAS.387..772P
Prieur et al., Paper VII 2009MNRAS.395..907P 2009MNRAS.395..907P
Scardia et al., Paper VIII 2010AN....331..286S 2010AN....331..286S
Prieur et al., Paper IX 2010MNRAS.407.1913P 2010MNRAS.407.1913P
(End) Patricia Vannier [CDS] 18-Mar-2011