J/AJ/140/1579 PHASES differential astrometry data archive (Muterspaugh+, 2010)
The PHASES differential astrometry data archive.
I. Measurements and description.
Muterspaugh M.W., Lane B.F., Kulkarni S.R., Konacki M., Burke B.F.,
Colavita M.M., Shao M., Wiktorowicz S.J., O'Connell J.
<Astron. J., 140, 1579-1622 (2010)>
=2010AJ....140.1579M 2010AJ....140.1579M
ADC_Keywords: Stars, double and multiple ; Positional data ; Interferometry
Keywords: astrometry - binaries: close - binaries: visual -
techniques: interferometric
Abstract:
The Palomar High-precision Astrometric Search for Exoplanet Systems
(PHASES) monitored 51 subarcsecond binary systems to determine
precision binary orbits, study the geometries of triple and quadruple
star systems, and discover previously unknown faint astrometric
companions as small as giant planets. PHASES measurements made with
the Palomar Testbed Interferometer (PTI) from 2002 until PTI ceased
normal operations in late 2008 are presented. Infrared differential
photometry of several PHASES targets were measured with Keck Adaptive
Optics and are presented.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 55 51 List of studied stars
table4.dat 142 1332 Palomar High-precision Astrometric Search for
Exoplanet Systems (PHASES) astrometry measurements
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See also:
J/AJ/140/1623 : PHASES diff. astrometry data archive. II. (Muterspaugh+, 2010)
J/AJ/140/1657 : PHASES diff. astrometry data archive. V. (Muterspaugh+, 2010)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [HD]
4- 9 I6 --- HD Star HD number
11- 12 I2 h RAh Simbad Hour of Right Ascension (J2000.0)
14- 15 I2 min RAm Simbad Minute of Right Ascension (J2000.0)
17- 20 F4.1 s RAs Simbad Second of Right Ascension (J2000.0)
22 A1 --- DE- Simbad Sign of the Declination (J2000.0)
23- 24 I2 deg DEd Simbad Degree of Declination (J2000.0)
26- 27 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0)
29- 30 I2 arcsec DEs Simbad Arcsecond of Declination (J2000.0)
32- 36 F5.3 mag Bmag Simbad B band magnitude
38- 42 F5.3 mag Vmag Simbad V band magnitude
44- 55 A12 --- SpType Simbad MK spectral type
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD Star HD number
8- 18 F11.5 d HJD Heliocentric Julian Date of observation
minus 2400000.5 (MJD)
20- 28 F9.4 mas delRA Differential Right Ascension between A and B
30- 38 F9.4 mas delDE Differential Declination between A and B
40- 43 F4.1 uas sigmin The 1σ uncertainty in minor axis
uncertain ellipse
45- 51 F7.1 uas sigmaj The 1σ uncertainty in major axis
uncertain ellipse
53- 58 F6.2 deg phi [0/180] Angle φ between uncertainty
ellipse major axis and RA axis (1)
60- 65 F6.1 uas sigRA Projected formal uncertainty in RA axis
67- 72 F6.1 uas sigDE Projected formal uncertainty in DE axis
74- 81 F8.5 --- cor [-1/1] Correlation between sigRA and sigDE
83- 87 F5.1 uas sigminc Rescaled 1σ uncertainty in minor axis
uncertain ellipse
89- 95 F7.1 uas sigmajc Rescaled 1σ uncertainty in major axis
uncertain ellipse
97-103 F7.1 uas sigRAc Projected rescaled uncertainty in RA axis
105-110 F6.1 uas sigDEc Projected rescaled uncertainty in DE axis
112-119 F8.5 --- corc [-1/1] Correlation between sigRAc and sigDEc
121-125 I5 --- Num Number of scans taken during a given night
127 I1 --- fD [0/1] Longitudinal dispersion compensator
code: in use (1) or not (0)
129 I1 --- fA [0/1] Autoaligner code: in use (1) or not (0)
131-140 A10 Hz Rate Tracking frequency of phase-referencing camera
(50, 100 or both)
142 I1 --- fO [0/3] Outlier code (3)
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Note (1): Measured from increasing differential right ascension through
increasing differential declination (the position angle of the uncertainty
ellipse's orientation is 90-φ); this is to be used with either columns
sigmin and sigmaj or columns sigminc and sigmajc - the uncertainty scaling
operates on the ellipse major and minor axes, and thus does not change the
ellipse's rotation angle.
Note (3): Outlier code as follows:
0 = measurement consistent with other measures
1 = a fringe ambiguity is suspected (the measurement is in error by ∼4mas)
2 = a significant outlier but not of the fringe ambiguity variety
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History:
From electronic version of the journal
References:
Muterspaugh et al., Paper II 2010AJ....140.1623M 2010AJ....140.1623M, Cat. J/AJ/140/1623
Muterspaugh et al., Paper III 2010AJ....140.1631M 2010AJ....140.1631M
Muterspaugh et al., Paper IV 2010AJ....140.1646M 2010AJ....140.1646M
Muterspaugh et al., Paper V 2010AJ....140.1657M 2010AJ....140.1657M, Cat. J/AJ/140/1657
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 11-Jul-2012