J/AJ/127/1727 Differential magnitudes of binary stars (Horch+, 2004)
Speckle observations of binary stars with the WIYN telescope.
IV. Differential photometry.
Horch E.P., Meyer R.D., Van Altena W.F.
<Astron. J., 127, 1727-1735 (2004)>
=2004AJ....127.1727H 2004AJ....127.1727H
ADC_Keywords: Stars, double and multiple ; Photometry
Keywords: binaries: visual - techniques: interferometric -
techniques: photometric
Abstract:
Five hundred seventy-six magnitude difference measures are presented
for 260 binary stars. These measures are derived from CCD-based
speckle observations taken at the WIYN 3.5m telescope at Kitt Peak
National Observatory during the period 1997-2000. Separations of the
systems range from over 1" down to near the diffraction limit of the
telescope. A study of multiple measures of the same targets indicates
that the measures have a typical uncertainty of better than 0.13mag
per 2 minute observation, and that multiple observations can be
averaged to arrive at smaller uncertainties. Results presented here
are also compared, insofar as it is possible, with measures in the
Hipparcos Catalogue and to previous studies using adaptive optics. No
major systematic errors were identified.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 33 257 Star positions (from Simbad)
table1.dat 81 576 Double star speckle photometry measures
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See also:
I/281 : WDS 2001.0 (Mason+ 2001)
J/AJ/117/548 : 1997 WIYN binary stars speckle observations (Horch+, 1999)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Star name
14- 15 I2 h RAh Right ascension (J2000.0)
17- 18 I2 min RAm Right ascension (J2000.0)
20- 23 F4.1 s RAs Right ascension (J2000.0)
25 A1 --- DE- Declination sing (J2000.0)
26- 27 I2 deg DEd Declination (J2000.0)
29- 30 I2 arcmin DEm Declination (J2000.0)
32- 33 I2 arcsec DEs Declination (J2000.0)
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name ADS, HR, or Durchmusterung number (1)
13- 23 A11 --- Disc Discoverer designation
25- 32 A8 --- HD HD (Cat. III/135) number
34- 45 A12 --- HIP Hipparcos I/239 (or Tycho I/250 if none)
catalog number
47- 56 A10 --- WDS Washington Double Star Catalog I/281 number (2)
58- 66 F9.4 yr Date Fraction of the Besselian year observation date
68- 71 F4.2 mag DelMag Observed magnitude difference
73- 75 I3 nm Wave Center wavelength of the filter used (3)
77- 78 I2 nm FWHM Full width at half-maximum of the filter band (3)
80- 81 A2 --- f_Date Flag on the observation (4)
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Note (1): Names:
ADS = Aitken double star catalog number
HR = Bright Star Catalogue (Cat. V/50)
BD, CP, CD = Durchmusterung catalog
Note (2): The right ascension and declination in J2000.0 coordinates are
given in the WDS Catalog (Mason et al., 2002, Cat. I/281) number.
Note (3): The information in the Wave and FWHM columns is that provided by
the manufacturer when the filters were purchased in the late 1980s.
(Two filters, 780 and 853nm, were purchased in the late 1990s.) Since
there is a possibility of a change in filter characteristics over
time, the filter passbands were measured in the laboratory in 2001
using a variable-wavelength monochrometer. The filters did exhibit
small but measurable (typically less than 0.5nm) differences in terms
of the center wavelength and FWHM from the values in Table 1. In order
to prevent confusion, we maintain the same filter identifications as
in previous papers where astrometry of the same observations have
already been reported. The only filters where there would be a change
from the values listed in Table 1 are in the cases of the 551, 601,
and 648nm filters. The measured central values for the 551 and 601nm
filters are 550 and 602nm, respectively, and for the 648nm filter, the
measured center wavelength is 647nm with a FWHM of 42nm.
Note (4): Flags on Date as follows:
a = Quadrant ambiguous, but consistent with previous measures in the
Fourth Catalog of Interferometric Measurements.
b = Quadrant ambiguous, but inconsistent with previous measures in
the Fourth Catalog of Interferometric Measurements.
b? = Quadrant ambiguous, but possibly inconsistent with previous
measures in the Fourth Catalog of Interferometric Measurements.
c = Quadrant unambiguous, but inconsistent with previous measures in
the Fourth Catalog of Interferometric Measurements.
c? = Quadrant unambiguous, but possibly inconsistent with previous
measures in the Fourth Catalog of Interferometric Measurements.
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History:
From electronic version of the journal
References:
Horch et al., Paper I 1999AJ....117..548H 1999AJ....117..548H, Cat. J/AJ/117/548
Horch et al., Paper II 2002AJ....123.3442H 2002AJ....123.3442H
Horch et al., Paper III 2002AJ....124.2245H 2002AJ....124.2245H
Horch et al., Paper V 2008AJ....136..312H 2008AJ....136..312H, Cat. J/AJ/136/312
Horch et al., Paper VI 2010AJ....139..205H 2010AJ....139..205H, Cat. J/AJ/139/205
Horch et al., Paper VII 2010AJ....143...10H 2010AJ....143...10H, Cat. J/AJ/143/10
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 19-May-2004