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III/14A F2 and Earlier Stars, North Galactic Pole Region (Slettebak+ 1959)
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A Finding List of Stars F2 and Earlier in a North Galactic Pole Region
Slettebak A., Stock J.
<Hamburger Sternwarte 5, No. 5 (1959)>
=1959AAHam...5..105S
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ADC_Keywords: Galactic pole, north
Description:
The catalog is the result of an objective-prism survey made with the
Hamburg 80-cm/120-cm Schmidt telescope. The F2 and earlier stars were
isolated from later-type objects by using the MK classification criteria
discussed in the source reference. The catalog contains 601 stars and
includes cross identifications to the numbering systems of the BD and HD
catalogs, coordinates (equinox B1950.0), photographic magnitudes, and
spectral types. The catalog consists of three files. The first two files
contain data. File 1 is for BD stars and File 2 is for non-BD stars. File
3 contains the remarks from the original data tables merged with those
following the data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
bdstars.dat 42 365 BD Stars
nonbd.dat 42 236 Non-BD Stars
notes.dat 132 135 Notes
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Byte-by-byte Description of file: bdstars.dat, nonbd.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Num Running number used on the charts in the
published paper
4- 10 A7 --- BD *BD number
11- 16 A6 --- HD Number in the Henry Draper (HD) Catalogue.
Blank if star has no HD and always blank
in nonbd.dat
17- 18 I2 h RAh Right ascension for equinox 1950 (in hours)
19- 22 F4.1 min RAm R.A. (minutes)
23 A1 --- DE- Declination for equinox 1950.
24- 25 I2 deg DEd DEC (degrees)
26- 27 I2 arcmin DEm Dec. (arcminutes)
28- 31 F4.1 mag Photomag Photographic magnitude from HD or AGK2
catalogues or estimated from prints of the
original plates by comparison with
standard stars from Selected Areas.
Intended for identification purposes only.
33- 41 A9 --- Sp Spectral classification. Mt. Wilson
luminosity classes in bytes 33-34. A
temperature class (A, F) is always in
byte 35, but temperature subclasses and
peculiarities are not uniform within the
data field.
42 A1 --- flag An asterisk if there is a note in the
remarks file; otherwise blank.
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Note on BD:
The sign is always in byte 4, the zone in bytes 5-6, and the number in bytes
7-10. All stars in bdstars.dat have BD numbers. This field is always blank
for the non-BD stars in nonbd.dat.
Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- StarNum Star number in the data catalog.
4 A1 --- flag "B" if the star belongs to the BD file,
"N" if to the non-BD file.
6 I1 --- RemNum Integer used to sequentially number remarks
for the same star. Can be used alone or
with byte 4 as a sort field for reordering
the remarks properly if they become
disorganized.
7-132 A126 --- rem Remarks in upper and lower case characters
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Remarks and Modifications:
The data set A Finding List of Stars of Spectral Type F2 and Earlier in a
North Galactic Pole Region was received from the Centre de Donnees
Stellaires, Strasbourg. As received, the data were contained in a single
file with 626 logical records of length 80 bytes. Each data table was
preceded by a brief title and data explanation and the notes were not
included. The following modifications were made to produce the three-file
catalogue described here:
1. The single file was divided into two files, one for the BD stars and one
for the non-BD stars, as the tables are separate in the original
publication. All but the data records were deleted, since explanatory
material of greater detail is now contained in the document.
2. From a record count and comparison with the published paper, two missing
records were discovered. These were added to the files. Ampersands (from
BCD coding) were changed to plus signs on all BD numbers and declination
values.
3. The spectral-type field was moved and made more uniform by shifting types
so that a temperature class is always in byte 35.
4. Information from the "Remarks" columns in the published tables and the
notes to the tables was combined, computerized and added as a third file.
For each star having a remark or remarks in the notes file, an asterisk
(*) was added to byte 42 of its record in the data files.
5. The logical record length of both data files was shortened from 80 bytes
to 42 bytes since bytes 43-80 were never used.
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(End) C.-H. Joseph Lyu [Hughes STX/NASA] 22-Jun-1995