J/AJ/120/2638 CCD speckle obs. of binary stars. II. (Horch+, 2000)
CCD speckle observations of binary stars from the southern hemisphere.
II. Measures from the Lowell-Tololo telescope during 1999.
Horch E., Franz O.G., Ninkov Z.
<Astron. J. 120, 2638 (2000)>
=2000AJ....120.2638H 2000AJ....120.2638H
ADC_Keywords: Stars, double and multiple ; Interferometry
Keywords: astrometry - binaries: close - binaries: visual -
techniques: interferometric
Abstract:
Speckle observations of 145 double stars and suspected double stars
are presented and discussed. On the basis of multiple observations, a
total of 280 position angle and separation measures are determined, as
well as 23 high-quality nondetections. All observations were taken
with the (unintensified) Rochester Institute of Technology
fast-readout CCD camera mounted on the Lowell-Tololo 61 cm telescope
at the Cerro Tololo Inter-American Observatory during 1999 October. We
find that the measures, when judged as a whole against ephemeris
positions of binaries with very well-known orbits, have root mean
square deviations of 18±03° in position angle and 13±2mas in
separation. Eleven double stars discovered by Hipparcos were also
successfully observed, and the change in position angle and/or
separation since the Hipparcos observations was substantial in three
cases.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 87 303 Double star speckle measures
table3.dat 52 17 Position angle and separation changes since the
Hipparcos observation epoch for Hipparcos
discovery objects
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See also:
VI/46 : Second Catalog of Interferometric Measurements of Binary Stars
(McAlister+, 1988)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
http://ad.usno.navy.mil/wds/ : Correspondance WDS/HDS/HIP numbers
J/A+AS/134/545 : Double star measurements 1995-1997 (Aristidi+ 1999)
J/AJ/106/352 : ICCD speckle obs. of binary stars. VIII (Hartkopf+ 1993)
J/AJ/106/637 : ICCD speckle obs. of binary stars. IX (Mason+, 1993)
J/AJ/106/1639 : ICCD Speckle obs. of binary stars. X. (McAlister+ 1993)
J/AJ/108/2299 : ICCD speckle obs. of binary stars. XI. (Hartkopf+ 1994)
J/AJ/119/3084 : ICCD speckle obs. of binary stars. XXIII. (Hartkopf+, 2000)
J/AJ/111/393 : ICCD speckle obs. of binary stars. XII (Al-Shukri+ 1996)
J/AJ/111/936 : ICCD Speckle obs. of binary stars. XIII (Hartkopf+ 1996)
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/other/PNAOJ/2.561 : Binaries speckle observations. IV. (Miura+ 1992)
J/AJ/117/548 : 1997 WIYN binary stars speckle observations (Horch+, 1999)
J/A+A/366/868 : Binary speckle measurements at Calar Alto. I. (Docobo+, 2001)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Object name
13- 24 A12 --- Disc Discoverer designation
26- 33 A8 --- HD The HD (Cat. III/135) number
35- 40 I6 --- HIP The Hipparcos Catalog (Cat. I/239) number
42- 53 A12 --- WDS The identification number in the Washington
Double Star Catalog (Cat. I/237) (1)
55- 63 F9.4 yr ObsDate Observation date
65- 69 F5.1 deg PA ? Position angle (2)
71 A1 --- l_Sep Limit flag for Sep
73- 76 F4.2 arcsec Sep Observed separation
78- 80 I3 nm CWave Center wavelength of the filter used
82- 84 I3 nm FWHM Full width at half maximum of the CWave filter
87 A1 --- n_Name Note on the object's quadrant (3)
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Note (1): Also the right ascension and declination in 2000 coordinates.
Note (2): North through east defines the positive sense of PA.
The position angles have not been corrected for precession and are
appropriate for the epoch of observation shown.
Note (3): Notes:
a: Quadrant ambiguous, but consistent with previous measures in the
CHARA 3rd Catalog.
b: Quadrant ambiguous, but inconsistent with previous measures in the
CHARA 3rd Catalog.
c: Quadrant unambiguous, but inconsistent with previous measures in
the CHARA 3rd Catalog.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Discover Discoverer designation (1)
10- 15 I6 --- HIP The Hipparcos Catalog (Cat. I/239) number
17- 20 F4.2 mag Vmag Total V band magnitude of the system
22- 25 F4.2 mag DelVmag Magnitude difference between stars
27- 31 F5.2 mas Plx Hipparcos trigonometric parallax
33- 35 I3 deg PA Position angle
37- 41 F5.3 arcsec Sep Separation of the components from Hipparcos
43- 45 I3 deg Delplx Difference between plx and its value in
Table 2
47- 51 F5.2 arcsec DelPA Difference between PA and the value in
Table 2
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Note (1): HDS = Hipparcos Double Star
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History:
From AJ electronic version
References:
Horch et al., Paper I 1997AJ....114.2117H 1997AJ....114.2117H
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 12-Jan-2001