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
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:
FileName Lrecl Records Explanations
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
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
Bytes Format Units Label Explanations
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)
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).
Byte-by-byte Description of file: table2.dat
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).
History: From electronic version of the journal References: Bauer et al, Paper I 1994PASAu..11..201B
(End) Patricia Vannier [CDS] 11-Sep-2010
|The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line|