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I/116       Cape Photographic Catalog 1950.0 (CPC)      (Jackson+ 1954-1968)

Cape Photographic Catalogue for 1950.0 zone -30 to -64 Jackson J., Stoy R.H. <Ann. Cape Obs. 17-20 (1954)> =1954AnCap..17...40J =1955AnCap..18.....J =1955AnCap..19.....J =1958AnCap..20.....J Cape Photographic Catalogue for 1950.0 zone -64 to -90 Stoy R.H. <Ann. Cape Obs. 21-22 (1966)> =1966AnCap..21.....S =1968AnCap..22.....S
ADC_Keywords: Positional data; Proper motions; Magnitudes, photographic; Photographic catalog ; Surveys Description: This catalog includes most of the stars from the 1900.0 Cordoba Zone Catalogues B and C in the zone -30 deg. -35 deg. at the equinox of 1925.0. Some of the fainter Cordoba stars have been omitted in the rather crowded regions in the Milky Way. The aim was to provide accurate places for an average of 9 to 10 stars per square degree as a reference for a rereduction of the AG positions. Most of the stars have visual magnitudes between 7 and 10. Positions and proper motions have been supplied from the General Catalogue for those stars that were too bright for accurate measurement on photographic plates. The positions are on the FK3 system for the equinox of 1950.0. The probable errors of the positions are nominally ± 0.15" in both right ascension and declination. That of the proper motions should not exceed ± 1.4"/century, or ±14 in the units in which the proper motions expressed in arc are given in the catalog. Introduction: Whenever possible, proper motions are derived by comparison with earlier visual observations but for many of the stars in the more southerly zones, no earlier observations exist. The magnitudes were determined from a series of in-focus photographs in both photographic and visual sensitivities. They are on the system defined by "Standard Magnitudes in the E Regions" (Cape Mimeogram No. 3, 1953). Although the resulting magnitudes are fairly close to this system, a small change of color equation with magnitude has not been completely eliminated. The transformation of the E-Region magnitudes to the UBV system is: B = SP(g) - 0.07 SCI + 0.20 V = SP(v) + 0.08 SCI - 0.06 B-V = 0.85 SCI + 0.26 Whenever possible, the spectral types are from the Henry Draper Catalogue or its extension. Types for a large number of other stars were supplied by the Harvard College Observatory. G. G. Cillie classified many stars between -30deg. and -40deg. on plates taken at Bloemfontein. Three errors were discovered after the catalog was typed. These have been corrected in this version. 3558 For Co. D. 30d 5059. read 30d 5061 7726 For Co. D. 32d10484, read 32d10488 10580 For spectral type F8, read K0 File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file cpc.dat 74 68467 Cape Photographic Catalog (CPC) data
See also: I/141 : Yale Zone Catalogues Integrated (Yale Univ 1939-1983; ADC 1989) Byte-by-byte Description of file: cpc.dat
Bytes Format Units Label Explanations
1- 3 A3 --- Vol *Index Number 4- 8 I5 --- ID Catalog Identification Number 9 A1 --- m_ID [a] Remark: a=supplemental star 10- 17 A8 --- DM Durchmusterung (CD or CPD) identification 18 A1 --- m_DM [a] Supplementary Durchmusterung star 19- 20 I2 --- n_DM [20,40]? 20=Cordoba, 40=Cape Durchmusterung 21- 22 I2 h RAh Right Ascension hours (1950.0) 23- 24 I2 min RAm Right Ascension minutes 25- 29 F5.2 s RAs Right Ascension seconds 30 A1 --- DE- Declination sign (1950.0) 31- 32 I2 deg DEd Declination degrees 33- 34 I2 arcmin DEm Declination arcminutes 35- 38 F4.1 arcsec DEs Declination arcseconds 39- 42 I4 0.1ms/yr pmRAs ? Proper Motion in RA 43- 46 I4 mas/yr pmRA ? Proper Motion RA*cos(DE) 47- 50 I4 mas/yr pmDE ? Proper Motion in DE 51- 55 F5.2 yr Ep-1900 Epoch of position (offset 1900) 56- 60 F5.2 mag SPg ? Photographic Magnitude 61- 65 F5.2 mag SPv ? Visual Magnitude 66- 70 F5.2 mag SCI ? Color Index 71- 74 A4 --- Sp Spectral Type
Note on Vol: ---------- ----------- Vol Number Zones (deg) ---------- ----------- 17A -30 to -35 18A -35 to -40 19A -52 to -56 20A -56 to -60 20B -60 to -64 21A -64 to -68 21B -68 to -72 21C -72 to -76 21D -76 to -80 22A -80 to -90 ---------- -----------
References: Gill D., Kapteyn J.C., 1895-1900, Cape Photographic Durchmusterung (CPD: -18 to -89), Annals of the Cape Obs., 3-5. ADC Cat. 1108. Nicholson W., Penston M.J., Murray C.A., De Vegt Ch.: 1984 Second Cape Photographic Catalogue 1950.0 (CPC2) I. Provisional Catalogue of Positions of Stars in the Cape Zone -40° to -52° Mon. Not. R. Astron. Soc. 208, 911. ADC Cat. 1085. Stoy, R.H., 1966, Cape Photographic Catalog, Ann. Cape Obs., 17-22. ADC Cat. 1004. Thome J.M.: 1892-1932 Cordoba Durchmusterung (CD: -22° to -89°), Resultados del Observatorio National Argentino 16, 17, 18, parts I & II. Cat. I/114.
(End) Julie Anne Watko [SSDOO/ADC] 07-MAY-1996
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

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