ADC/CDS Standard Document for Catalog:/catalogs/1/1116/
ADC/CDS Standard Document for Catalog:| 1. Use the ADC Data Viewer Suite to visualize the data. |
|
| 2. Get the data files via anonymous FTP. (See Note.) |
|
I/116 Cape Photographic Cat. 1950.0 (CPC; Jackson+ 1954-66)
================================================================================
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 -80
Stoy R.H.
<Ann. Cape Obs. (1966)>
=1966AnCap..21.....S
================================================================================
ADC_Keywords: Positional data; Proper motions; Magnitudes, photographic;
Photographic catalog
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
data.dat 74 68467 Cape Photographic Catalog (CPC) data
--------------------------------------------------------------------------------
Byte-by-byte Description of file: data.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- INDEX *Index Number
4- 8 I5 --- ID Catalog Identification Number
9 A1 --- rem [a] Remark: a=supplemental star
10- 12 I3 --- zone ? Durchmusterung Zone
13- 17 I5 --- DM ? Durchmusterung Identification
18 A1 --- n_DM *[a] Remark on DM
19- 20 I2 --- code *? Durchmusterung Code
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 cs/ha pmRA ? Centennial Proper Motion in RA
43- 46 I4 dam/ha pmX ? Centennial Proper Motion RA*cos(DE)
47- 50 I4 dam/ha pmDE ? Centennial Proper Motion in DE
51- 55 F5.2 a Ep Epoch - 1900
56- 60 F5.2 mag SPg ? Photographic Magnitude
61- 65 F5.2 mag SPv ? Visual Magnitude
66- 70 F5.2 mag CI ? Color Index
71- 74 A4 --- Sp Spectral Type
--------------------------------------------------------------------------------
Note on INDEX:
INDEX 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
Note on n_DM:
a = record has been inserted between successive DM numbers
Note on code:
20 = CD
40 = CpD
--------------------------------------------------------------------------------
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{deg} to -52{deg} 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{deg} to -89{deg}),
Resultados del Observatorio National Argentino 16, 17, 18, parts I &
II. ADC Cat. 1114.
================================================================================
(End) Julie Anne Watko [SSDOO/ADC] 07-MAY-1996