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 1954AnCap..17...40J
=1955AnCap..18.....J 1955AnCap..18.....J
=1955AnCap..19.....J 1955AnCap..19.....J
=1958AnCap..20.....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 1966AnCap..21.....S
=1968AnCap..22.....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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cpc.dat 74 68467 Cape Photographic Catalog (CPC) data
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See also:
I/141 : Yale Zone Catalogues Integrated (Yale Univ 1939-1983; ADC 1989)
Byte-by-byte Description of file: cpc.dat
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Bytes Format Units Label Explanations
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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
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Note on Vol:
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Vol Number Zones (deg)
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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
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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