J/other/PASA/24.118 Wide southern double stars (Bauer+, 2007)
Astrometric observations of wide southern double stars - II.
Bauer C., White G.L., Blank D., Jones P.A.
<Publ. Astron. Soc. Australia, 24, 118-137 (2007)>
=2007PASA...24..118B 2007PASA...24..118B
ADC_Keywords: Stars, double and multiple ; Photometry, Cousins
Keywords: Stars: double, multiple, binary
Abstract:
Astrometric CCD observations have been made of wide (∼3 to 60 arcsec)
southern double stars selected from the Washington Double Star
catalogue (WDS). Southern double stars have not been well studied in
the past; typically they had not been measured since about 1930, and
∼50% of them have been observed only once before our observations. Of
the pairs measured ∼80% show no evidence of motion since the last
observation. This is Paper II in which we present the observations of
290 WDS stars in the approximate RA range 17h13m to 07h30m and in
the declination range -70° to -60°. We suggest 412 companions
for these 290 stars and list 29 (10%) pairs that have shown
significant motion.
Description:
Observations were made during three periods, 6-10 October 1992, 4-25
November 1992 and 8-12 December 1993, with the last session being
primarily concerned with calibration. The mean epoch of the
observations is 1992.9. We used an SBIG ST6 CCD camera mounted on
the f/18 focus of the 24 inch (0.6m) telescope of Mount Stromlo and
Siding Spring Observatory (MSSSO) at Siding Spring Observatory (SSO),
Australia. Images were obtained of each star through uncalibrated
Cousins R and I filters. The stars were sufficiently bright that
exposure times could be kept short, typically 180s or less.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 112 412 Wide double stars in the declination range
-70° to -60° and RA range 17h13m to 07h30m
table2.dat 62 290 Movement of double stars
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2010)
I/274 : CCDM (Catalog of Components of Double and Multiple stars)
(Dommanget+ 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS name (HHMMm+DDMM)
12- 19 A8 --- Name Name
21- 22 I2 h RAh Right ascension (J2000)
24- 25 I2 min RAm Right ascension (J2000)
27- 32 F6.3 s RAs ? Right ascension (J2000)
34 A1 --- DE- Declination sign (J2000)
35- 36 I2 deg DEd Declination (J2000)
38- 39 I2 arcmin DEm Declination (J2000)
41- 44 F4.1 arcsec DEs ? Declination (J2000)
47- 50 A4 --- Comp Component
52- 56 F5.2 arcsec Irho ?=- Separation measured through I filter
58- 62 F5.2 arcsec Rrho Separation measured through R filter
64- 68 F5.2 arcsec rho ?=- Average separation
70- 75 F6.2 deg Ipa ?=- Position angle measured through I filter
77- 82 F6.2 deg Rpa ?=- Position angle measured through R filter
84- 89 F6.2 deg PA Average position angle
91- 95 F5.2 mag Vmag ? V magnitude
97-101 F5.2 mag dRmag ?=- Difference in magnitude between the
primary and the secondary star in R band
103-107 F5.2 mag dImag ?=- Difference in magnitude between the
primary and the secondary star in I band
108 A1 --- Note [*] Note (1)
110-111 I2 % Prob ? Percentage probability of chance alignment
of a background star (2)
112 A1 --- M [M] M for mover (3)
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Note (1): For 02504-6759, (recno 90) dImag=150 corrected into dImag=1.50.
Note (2): No numerical value indicated that the percentage probability is
less than 1% (see above).
Note (3): M (`moved') designates the 29 secondary stars have moved more
than 10 arcsec relative to the primary of the period between the first
available observation and ours (Table 2).
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS name (HHMMm+DDMM) nomenclature
12- 19 A8 --- Name Name
21- 24 I4 yr Date1 First observation date
26- 28 I3 deg PA1 [0/395] First observation position angle
30- 34 F5.1 arcsec rho1 First observation separation
36- 41 F6.2 deg PA This work position angle
43- 47 F5.2 arcsec rho This work separation
49- 52 I4 deg dPA Difference in PA between the two observations
54- 58 F5.1 arcsec drho Difference in rho between the two observations
60- 62 I3 arcsec Delta Movement in the period since first WDS
observation (linear distance between the first
and our positions).
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History:
From electronic version of the journal
References:
Bauer et al, Paper I 1994PASAu..11..201B 1994PASAu..11..201B
(End) Patricia Vannier [CDS] 11-Sep-2010