The following document lists the file adc.doc
from catalogue III/31B.
A plain copy of the file
(without headers/trailers) may be downloaded.
R-SAW-7/79-30
DOCUMENTATION FOR THE MACHINE-READABLE VERSION OF THE
UNIVERSITY OF MICHIGAN CATALOGUE OF
TWO-DIMENSIONAL SPECTRAL TYPES FOR THE HD STARS
July 1979
Contract NAS 5-25369
Theresa A. Nagy
Prepared for:
National Aeronautics and Space Administration
Goddard Space Flight Center
Greenbelt, Maryland 20771
Prepared by:
St Systems Corporation
4400 Forbes Boulevard
Lanham, Maryland 20706
ABSTRACT
--------
Documentation for the machine-readable version of the University of
Michigan Catalogue of Two-Dimensional Spectral Types for the HD Stars is
presented. This includes a description of each logical record, a history
of the origin and modifications to the catalogue, statistics and
information concerning the magnetic tape version of the catalogue.
ii
TABLE OF CONTENTS
-----------------
Section 1 - Introduction ............................................ 1-1
Section 2 - Tape Contents ........................................... 2-1
Section 3 - Tape Characteristics .................................... 3-1
Section 4 - Remarks and Modifications ............................... 4-1
Section 5 - Sample Listings * ....................................... 5-1
LIST OF TABLES
--------------
Table
-----
2-1 Tape Contents ............................................... 2-2
2-2 Tape Contents of Remarks .................................... 2-6
3-1 Tape Characteristics ........................................ 3-1
4-1 *Plate Codes ................................................. 4-2
4-2 *Description of Remarks ...................................... 4-7
* See the hardcopy documentation available from the Astronomical Data
Center for marked sections and tables.
iii
SECTION 1 - INTRODUCTION
------------------------
In recent years there has been a trend away from publishing catalogues in
book form to preparing catalogues by computer and distributing them on
magnetic tape, with appearance in book form a secondary occurrence. This
memo is the result of the development of the documentation for the
machine-readable version of the catalogue and includes the basic
information given in the original preface of the published catalogue.
This memo should be distributed along with any copy of the
machine-readable version of the catalogue.
1-1
SECTION 2 -TAPE CONTENTS
------------------------
A byte-by-byte description of the contents of the catalogue is given in
Table 2-1. The information in the "Description" column is derived mainly
from the published version of the catalogue whenever possible. The
"Suggested Format" column is for FORTRAN-formatted reads.
2-1
Table 2-1. Tape Contents (1 of 4)
UNIVERSITY OF MICHIGAN CATALOGUE OF
TWO-DIMENSIONAL SPECTRAL TYPES FOR THE HD STARS
TAPE CONTENTS OF MAIN CATALOGUE
Suggested
Bytes Description Format
----- ----------- ---------
1- 6 HD number I6
All stars in the Henry Draper (HD) Catalgoue
which have declination (1900) south of (and
including) -53.0 degrees are included whether
a new spectral type is available or not
7 '*' spectral type contains lowercase letters A1
in the printed version of the catalogue
8 '+' not classifiable - spectral type is from A1
HD catalogue
9- 24 Spectral type 16A1
25 Blank 1X
26 'A' or ' ' (blank) A1
Whenever the classification used is an average,
the quality assigned it is the highest of the
qualities used in forming the average, and the
quality is prefixed by 'A' in byte 26. This
byte is blank if there is no averaging.
27 Quality I1
=1, spectra near optimum exposure and not
overlapped by other spectra
=2, spectra may be slightly under or over-
exposed, or slightly overlapped
=3, spectra usually quite overlapped or
under-exposed
=4, spectra are worse than quality 3, but
still probably better than the HD type
2-2
Table 2-1. Tape Contents (2 of 4)
Suggested
Bytes Description Format
----- ----------- ---------
28 Blank 1X
29- 32 Remark 4A1
(cf. attached Table 4-2 for description of
remarks)
33 Blank 1X
34- 39 Magnitude (decimal point is explicit). With F6.2
a few exceptions, the photographic magnitude
is given exactly as it appears in the HD
Catalogue. If no magnitude was given in the
HD Catalogue, there is a value of 99.9 in
these bytes.
40 'V' or ' ' (blank) A1
A 'V' in byte 40 indicates that the star is a
known or suspected variable, and there is a
remark in the remarks file of the catalogue
for the given entry.
41 Blank 1X
42- 43 Right ascension (hours) Epoch 1900.0 I2
44 Blank 1X
45- 48 Right ascension (minutes) Epoch 1900.0 F4.1
(decimal point is explicit)
49 Blank 1X
50 Sign of the declination A1
51- 52 Declination (degrees) Epoch 1900.0 I2
53 Blank 1X
54- 55 Declination (arcminutes) Epoch 1900.0 I2
56 Blank 1X
2-3
Table 2-1. Tape Contents (3 of 4)
Table 2-1. Tape Contents (3 of 4)
Suggested
Bytes Description Format
----- ----------- ---------
57- 61 One-Hundred Year Precession in right ascension F5.1
(minutes) (decimal point is explicit)
Very near the south pole some of the preces-
sions are larger than -99.9 arcminutes and
these values are given in the remarks.
62 Blank 1X
63- 65 One hundred year precession in declination I3
(arcminutes)
66 Blank 1X
67- 71 Galactic Longitude (System II) (degrees - F5.1
decimal point explicit)
72 Blank 1X
73- 77 Galactic Latitude (System II) (degrees - F5.1
decimal point explicit)
78 Blank 1X
79- 81 Zone (value of the zone of the Cape Photo- I3
graphic Durchmusterung (CPD) number in
degrees)
82 Blank 1X
83- 87 Sequential CPD number within given zone I5
88 Blank 1X
89- 91 Plate Code #1 A3
Each plate has its own identification code.
The use of Table 4-1, knowing the plate code
will define the plate number and date of the
plate. The plate code numbers also serve to
indicate the number of plates used in obtaining
the average spectral type given.
2-4
Table 2-1. Tape Contents (4 of 4)
Suggested
Bytes Description Format
----- ----------- ---------
92 Blank 1X
93- 95 Plate Code #2 A3
Same remarks as for plate code #1
96 Blank 1X
97- 99 Plate Code #3 A3
Same remarks as for plate code #1
100 Blank 1X
101-103 Plate Code #4 A3
Same remarks as for plate code #1
104 Blank 1X
105-107 Plate Code #5 A3
Same remarks as for plate code #1
2-5
Table 2-2. Tape Contents of Remarks
UNIVERSITY OF MICHIGAN CATALOGUE OF
TWO-DIMENSIONAL SPECTRAL TYPES FOR THE HD STARS
Suggested
Bytes Description Format
----- ----------- ---------
1- 6 HD number I6
7-400 Remarks - free form 94A1, 3(100A1)
2-6
SECTION 3 - TAPE CHARACTERISTICS
--------------------------------
The information contained in this section is sufficient for the user to
read the machine-readable version of the catalogue. The statistics of
the contents of the entire tape are given in Table 3-1; if more than one
number is given for any entry this refers to a data set with more than
one file. The multiple numbers then refer to the first, second, third,
etc., files of the tape.
Table 3-1. Tape Characteristics
CATALOGUE MHD
NUMBER OF TRACKS 9
DENSITY (BPI) 1600
NUMBER OF FILES 2
LOGICAL RECORD LENGTH (BYTES) 107, 400
BLOCKSIZE (BYTES) 10700, 8000
BLOCKING FACTOR 100, 20
RECORD FORMAT (IBM OS/JCL) FB
TOTAL NUMBER OF LOGICAL RECORDS 36382, 4636
TOTAL NUMBER OF BLOCKS 364, 232
3-1
SECTION 4 - REMARKS AND MODIFICATIONS
-------------------------------------
Much of the information contained in Table 2-1 of this document was taken
from the preface to the University of Michigan Catalogue of Two-
Dimensional Spectral Types for the HD Stars (Volume I) by N. Houk and A.
P. Cowley. Their Table 4 is reproduced here as Table 4-1, and their
Section V of the preface is given here as Table 4-2. This is done as a
convenience for the user of the machine-readable version of this
catalogue who does not have access to the printed version of this
catalogue.
Some modifications were made to the machine-readable version of this
catalogue to facilitate usage of the tape. These modifications are
listed below.
1. Asterisks were given in bytes 35-38 if no magnitude
was available from the HD Catalogue. These have been
replaced by the value of 99.9 so that a FORTRAN F-
format read can be performed without causing an
error.
2. If a plus sign was given (cf. remark for byte 8) it
was originally the first piece of information of the
spectral type. This section of the spectral types
was modified so that the plus sign was shifted left
one byte. The asterisk that was in byte 8 has been
moved to byte 7. This was done so that the first part
of the spectral type is in the first two bytes of the
spectral type field (byte 9 and 10).
3. Since it is easier (for the majority of people who
will be using this machine-readable version of the
catalogue) to used a fixed block record format, the
remarks file has been converted from an undefined
length record to a fixed-length record. Each of
these records is 400 bytes in length.
4-1
Table 4-2. Description of Remarks (1 of 5)
(Reproduced from the original published version of the catalogue)
Further information about 4636 stars is given in the back of the
catalogue, starting on p. 407. To aid the user in deciding whether to
consult the remarks for a particular star, the following notation is used
in column 3c of the catalogue [bytes 29-32 of machine-readable version]:
B indicates that the remark contains the HR (Bright Star Catalogue)
number and the Bayer or Flamsteed designations where applicable. In
a very few (<10) cases other numerical Flamsteed-like designations
were inadvertantly included.
L indicates that information from the astronomical literature is
given. In most cases individual literature references are not
given: references systematically searched for HD stars south of
Declination = -53 degrees (by APC) are listed at the end of this
section. Remarks are generally restricted to those relevant to the
spectral appearance, such as rotation, variability, and duplicity,
and generally have included only information about the star which
might affect the spectral classification. Visual double stars noted
in the HD catalogue whose duplicity was not detected during the
spectral classification are included under the 'L' remarks, but
visual doubles from other sources are not listed.
O includes remarks that do not fit into any other category. Almost
all of these are NGC or IC designations for nebulae and CoD nos. or
a note that there is no CPD or CoD number. Most such remarks plus
some in other categories are taken from the Henry Draper Catalogue.
Corrections of previously undiscovered errors in positions and other
information in the HD catalogue which we found have also been listed
as 'O' remarks.
R Nearly half of the stars in the remarks table have remarks of this
type. With the exception of one group described below, all 'R'
remarks were written by NH in the course of the spectral
classification and all are related in some way to the spectrum.
Most of the symbols and notation are self-explanatory, but note that
"yld." was used for yields and yield (followed by a temperature or
luminosity type) since an arrow or an implies sign was not
available. Note also that in quotations the close quote sign is the
same as the open quote sign, and hence faces the wrong direction.
We discuss some of the more frequent types of 'R' remarks, in order
of frequency of occurrence.
In nearly 400 cases the fact that the star was visually double was
deduced from the appearance of the spectrum (fuzzy, double-lined, or
4-7
Table 4-2. Description of Remarks (2 of 5)
(Reproduced from the original published version of the catalogue)
closely overlapped) and the following data were listed (taken from
Lick Publ. 21, 1963, unless otherwise noted): position angle p,
angular distance d, and magnitudes of components. Sometimes a rough
spectral type for the secondary component is also listed in the
remarks, but often only a single type is listed in the catalogue,
and it may actually be an average of the two components in some
cases.
Over 300 stars in the catalogue have composite spectra or possible
composite spectra and each of these has a remark so that they can be
easily differentiated from known double stars which also sometimes
have two types listed in the catalogue.
Remarks are made for all stars (approximately 250) showing emission
or filled-in lines, and the lines in emission are identified in the
remark. For nebulae the lines in emission are often not listed.
The great majority of Am stars do not have remarks, but
approximately 175 do. Similarly some 80 of the Ap stars have 'R'
remarks. For both Am and Ap stars these are mainly weak or
questionable cases, and the spectral type listed in the catalogue
may not indicate the possible metallic-line or peculiar nature of
the star. Unusual and extremely strong cases are also included
among the remarks.
About 130 of the 'R' remarks pertain to fuzzy or closely overlapped
spectra some of which are probably new visual or spectroscopic
binaries.
Almost all of the approximately 125 weak-metal stars have 'R'
remarks. In many cases the spectral type indicated by the G band is
given to supplement the H-line and metallic-line types given in the
catalogue. Slight or questionable and extreme cases are also noted.
About 80 stars of widely different spectral types have 'R' remarks
because the various spectral line ratios indicate discrepant
temperature or luminosity types and it was not possible to arrive at
a consistent type. Some of these are certainly due to the composite
or closely double nature of the stars, while others reflect
abundance anomalies. Still others may be caused by overlapping
spectra or emulsion defects.
Other smaller categories of 'R' remarks include: approximately 50
substantial disagreements with the HD catalogue, mainly with respect
4-8
Table 4-2. Description of Remarks (3 of 5)
(Reproduced from the original published version of the catalogue)
to spectral types; approximately 35 possible Fm Delta Del types;
approximately 30 stars with strong CH -- these are not indicated in
the catalogue spectral types.
The only 'R' remarks not written during the classification were
those giving unpublished spectral types by Garrison and Hagen in
cases where a spectral type (listed in the catalogue) was also
obtained from Michigan plates. The additional type is given in the
remarks because in many cases the Michigan spectrum was quite
overexposed. It also provides an oppurtunity for those interested
to compare the results.
V All variables and suspected variables are indicated by a 'V' after
the magnitude. Each has a remark in the back of the catalogue
giving variable star designation, type of variability, magnitude
range, and period, when these are known.
t [Actually a dagger symbol in the hardcopy text. -- ed.] All spectral
types in the catalogue taken from other sources are preceded with a
dagger. Each such star has a remark giving the reason the star
could not be classified on Michigan plates and the source of the
classification. All but 100 were taken from the HD catalogue. In
the case of types taken from the catalogues by Jaschek et al.
(1964) and by Kennedy and Buscombe (1974) the above are quoted
rather than the original reference in these catalogues. MK types
for stars brighter than 4.75 magnitudes not included in the paper by
Hiltner, Garrison, and Schild referenced below have been kindly
provided by R. F. Garrison and Gretchen L. Hagen Harris in advance
of publication. Although the types are preliminary, they are on a
more homogeneous system than any others available. References
marked with a dagger below were used as sources for spectral types.
Stars which were too faint to classify on Michigan plates were not
searched for in dagger references, since chances of them being found
were small. Instead the HD type was given. Note that in the
remarks the reference to Hiltner, Garrison, and Schild (1969) is
incorrectly given as Hiltner, Schild, and Garrison.
References
L = reference for 'L' remarks
V = reference for 'V' remarks
t = reference for 't' [dagger] remarks
4-9
Table 4-2. Description of Remarks (4 of 5)
(Reproduced from the original published version of the catalogue)
L Aller, M. F., Elste, G., and Williams, J. A. 1970, "Michigan
Abundance Catalogue", unpublished.
L Babcock, H. W. 1958, "A Catalogue of Magnetic Stars", Ap. J.
Suppl., 3, 141.
L Batten, A. H. 1967, "Sixth Catalogue of the Orbital Elements of
Spectroscopic Binary Systems", Pub. D.A.O., 13, 119.
L Bernacca, P. L. and Perinotto, M. 1970, "A Catalogue of Stellar
Rotational Velocities", Cont. Obs. Astro., Padova, No. 239.
L Bidelman, W. P. 1954, "Catalogue and Bibliography of Emission-Line
Stars of Types Later than B", Ap. J. Suppl., 1, 175.
tL Cannon, A. J. and Pickering, E. C. 1918-24, "The Henry Draper
Catalogue", Harvard Annals, 91-99.
t Hiltner, W. A., Garrison, R. F. and Schild, R. E. 1969, Ap. J., 157
313.
L Hoffleit, D. 1964, Catalogue of Bright Stars, (New Haven: Yale
University Observatory).
t Jaschek, C., Conde, H., and Sierra, A. C. 1964, "Catalogue of
Stellar Spectra Classified in the Morgan-Keenan System", Series
Astronomica, 28, Obs. Astron., U. Nac. La Plata.
L Jaschek, C., Ferrer, L., and Jaschek, M. 1971, "Catalogue and
Bibliography of B type Emission Line Stars", Series Astronomica,
28, Obs. Astron., U. Nac. La Plata.
t Kennedy, P. M. and Buscombe, W. 1974, MK Spectral Classifications,
(Evanston: Department of Astronomy, Northwestern University).
V Kukarkin, B. V. et al. 1965, Second Catalogue of Suspected Variable
Stars, (Moscow: Sternberg State Astronomical Institute).
V Kukarkin, B. V. et al. 1969, General Catalogue of Variable Stars,
3rd Ed., (Moscow: Sternberg State Astronomical Institute).
L Pedoussant, A., and Ginestet, N. 1971, "Spectroscopic Binaries --
11th Complementary Catalogue", Astr. and Ap. Suppl., 4, 253.
4-10
Table 4-2. Description of Remarks (5 of 5)
(Reproduced from the original published version of the catalogue)
L Uesugi, A. and Fukuda, I. 1970, "A Catalog of Rotational Velocities
of the Stars", Contr. Inst. Ap. and Kwasan Obs., Kyoto, No. 189.
L Wackerling, L. R. 1970, "Catalogue of Early-Type Stars Whose Spectra
Have Shown Emission Lines", Mem. R.A.S., 73, 153.
4-11
© UDS/CNRS