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I/119 Southern Durchmusterung (Schoenfeld+ 1886)
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Bonner Sternverzeichniss, vierte Sektion,
Schoenfeld E.
<Astronomische Beobachtungen auf der Sternwarte der Koeniglichen Rheinischen
Friedrich-Wilhelms-Universitat zu Bonn 8, Part IV (Bonn: Adolph
Marcus) (1886)>
=1886BDS...C......0S
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ADC_Keywords: Surveys; Durchmusterungen
Description:
The Southern Durchmusterung (SD) was computerized at the Centre de
Donnees Astronomiques de Strasbourg and at the Astronomical Data
Center at the National Space Science Data Center, NASA/Goddard
Space Flight Center. Corrigenda listed in the original SD volume
and published by Kuestner and Sticker have been incorporated into
the machine file. In addition, one star indicated to be "missing"
in a published list, and later verified, is flagged so that it can
be omitted from computer plotted charts if desired. Stars deleted
in the various errata lists have been similarly flagged, while
those with revised data are flagged and listed in a separate table.
This catalog covers the zones -02 to -23 degrees.
Introduction:
The Southern Durchmusterung (SD, Schoenfeld 1886, Becker 1949,
Schmidt 1967) is a visual survey of stars in the declination zones
-02 to -23 degrees, completed as an extension to Argelander's
(1859-62) monumental Bonner Durchmusterung (BD). Schoenfeld's
survey was carried out using the same methods as had been used for
the BD, which Schoenfeld had helped to compile as one of
Argelander's assistants. The goal of the survey was to extend the
BD to declination -23 deg (a plan originally adopted by Argelander)
with approximately the same magnitude limits, although the primary
instrument was of larger aperture (159 mm) than the 78-mm telescope
used for the BD. Thus, whereas the BD magnitude estimates extend to
9.4 mag with all fainter stars assigned a magnitude of 9.5, the SD
magnitude estimates extend to 9.9 mag with all fainter stars
assigned a magnitude of 10. As with the BD, the SD contains a
rather large number of stars fainter than 10.0 mag and even
occasionally as faint as 11 mag. Positions are given to the nearest
0.1 sec in right ascension and 0.1 arcmin in declination as in the
BD.
The document originally prepared by the ADC (adc.doc) contains
substantial additional information.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
adc.doc 80 602 The original document
sd.dat 32 134834 The SD catalog
sdchg.dat 75 24 Changes from the printed cat.
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See also:
I/122 : Bonner Durchmusterung (+89 to -01 degrees)
I/114 : Cordoba Durchmusterung (-22 to -90 degrees)
I/108 : Cape Photographic Durchmusterung (-18 to -90 degrees)
Byte-by-byte Description of file: sd.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- cat [SD] The catalog prefix
3 A1 --- zonesign [-] The sign of the declination zone
4- 5 I2 deg zone The declination zone
6- 10 I5 --- num The number of the star within the zone
11 A1 --- n_num *[aDM*] Code
12- 15 F4.1 mag mag *Estimated visual magnitude
16- 17 I2 h RAh Right Ascension 1855 (hours)
18- 19 I2 min RAm Right Ascension 1855 (minutes)
20- 23 F4.1 s RAs Right Ascension, 1855 (seconds)
24- 24 A1 --- DE- [-]Sign of declination
25- 26 I2 deg DEd Declination 1855 (degrees)
27- 30 F4.1 arcmin DEm Declination 1855 (minutes)
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Note on n_num:
Upper and lower case codes. All lower case letters represent
supplemental (footnoted) stars added to the catalog via published
corrigenda. Upper case letters and asterisks are flags that
indicate changes to the original data or to the status of a star in
the catalog. They have the following meanings:
* Data have been corrected as a result of corrigenda, or there are
special notes associated with the star. All changes are given in
Section A, Table 4, with appropriate notes.
D The star has been deleted in a later edition of the catalog. This
was done by overstriking entries with horizontal lines.
M The star was noted as "missing" in a list published by Pickering
(1907). This entry (there is only one such star) was verified by
R. A. Downes and at the ADC.
Note on mag:
20.0 = neb; 30.0 = var; 40.0 = nova or nova?;
50.0 = cum (integrated magnitude estimate of a cluster of stars).
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Byte-by-byte Description of file: sdchg.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- zone The SD zone
4- 8 I5 --- num The SD number
9 A1 --- n_num Code on star number
11- 13 A3 --- field The field changed
15- 18 F4.1 --- old ?The printed value
20- 23 F4.1 --- new ?The corrected value
27- 75 A49 --- note Comments
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History:
The data in the machine-readable Southern Durchmusterung were keyed
directly to disk storage from the published catalogs at the Centre
de Donnees Astronomiques de Strasbourg (-02 through -21 deg. zones)
and at the Astronomical Data Center of the National Space Science
Data Center at the NASA Goddard Space Flight Center (-01, -22 and
-23 deg. zones).
Most of the data entry work was done at the CDS, where the data
were also verified. The ADC zones -01 and -23, although not often
used for stellar designations (the BD is used in zone -01 and the
Cordoba Durchmusterung in zone -23), were added for completeness.
The three ADC zones were computerized and proofread by Wayne Warren
Jr. All zones were carefully examined, checked for sequencing and
record counts, reformatted, and merged in the correct order at the
ADC, where the final catalog was assembled. The published
corrigenda lists were cross checked against the reprinted editions
(1949, 1967) of the catalog. The final catalog was run through a
verification program that checked numerical sequencing of the SD
numbers, monotonic increase in right ascension, and allowed data
ranges. All cases where stars are out of RA order were checked in
the original data to verify that their positions are as in the
original catalog or the corrigenda.
The final file is ordered north to south strictly by SD number,
i.e., in the zone order -01, -02, ..., -23. Users should note,
however, that all stars are not strictly in right ascension order
within each zone. This is because individual stars are occasionally
out of RA order in the original catalog and because of corrections
inserted from the corrigenda.
Remarks and Modifications:
All changes made to SD data and known to Warren and Ochsenbein were
incorporated into the present machine-readable version. Unlike the
Bonner Durchmusterung, where there had been numerous stars added
and deleted, changes in supplemental entries from version to
version, and a large number of data corrections, the changes to the
SD are relatively few. There were two stars added as supplementary
entries ("a" suffix), two stars deleted, and one star published as
"missing" by Pickering (1907) and subsequently verified by R. A.
Downes of Applied Research Corporation. A small list of corrections
was also included in the introduction to the original published
catalog. These modifications to the printed catalog are flagged by
codes in byte 11 of the affected records and are listed in
sdchg.dat.
Acknowledgments:
Drs. Warren and Ochsenbein express appreciation to M. J. Wagner, M.
Maslo, and R. Bonnet, who keyed the SD data to disk at the CDS
using preprocessing software written and implemented by F.
Ochsenbein. They thank Dr. R. A. Downes for bringing the cases of
"missing" BD and SD stars to their attention and are grateful for
the support of the CDS director, Dr. C. Jaschek, during the course
of the work.
This document is based on the original ADC document prepared by Wayne
Warren, Jr. of the ADC and Francois Ochsenbein of the CDS.
References:
Argelander F. W. A. 1859-1862, Bonner Sternverzeichniss, erste bis
dritte Sektion, Astronomischen Beobachtungen auf der Sternwarte
der Koeniglichen Rhein., Friedrich-Wilhelms-Universitat zu Bonn,
Bande 3-5.
Becker F. 1949, Bonner Durchmusterung, Suedlicher Teil,
Deklinations-Zonen -2 bis -22 grade Sternverzeichnis, zweite,
berichtigte Auflage (Bonn: Ferd. Duemmlers Verlag).
Chandler S. C. 1896, Astron. J. 16, 145.
Couteau P., Fulconis M., Ochsenbein F., Wagner M. J., and
Maslo W. 1983, Inf. Bull. CDS No. 25, p. 83.
Kuestner F. 1918, Astron. Nach. 206, 69 (Nr. 4929).
Kuestner F. 1925, Astron. Nach. 223, 309 (Nr. 5347).
Pickering E. C. 1885, Harv. Ann. 14.
Pickering E. C. 1892, Harv. Ann. 23.
Pickering E. C. 1907, Astron. Nach. 175, 139.
Pickering E. C. 1913, Harv. Ann. 72.
Schmidt H. 1967, Bonner Durchmusterung, Suedlicher Teil,
Deklinations- Zonen -2 bis -22 grade Sternverzeichnis, dritte
Auflage (Bonn: Ferd. Duemmlers Verlag).
Schoenfeld E. 1886, Bonner Sternverzeichniss, vierte Sektion,
Astronomische Beobachtungen auf der Sternwarte der
Koeniglichen Rheinischen Friedrich-Wilhelms-Universitat zu Bonn
8, Part IV (Bonn: Adolph Marcus).
Sticker B. 1935, Astron. Nach. 256, 341 (Nr. 6139).
Wagner M. J. 1984, Inf. Bull. CDS No. 26, p. 87.
Wagner M. J. 1986, Inf. Bull. CDS No. 30, p. 117.
Warren W. H Jr. 1987, Inf. Bull. CDS No. 32, p. 67.
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(End) Nancy G. Roman [NSSDC/ADC] 12-Nov-1994