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I/269 CCDM (Components of Double and Multiple stars) (Dommanget+ 2002)
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Catalogue of the Components of Double and Multiple Stars (CCDM)
Dommanget J., Nys O.
<Observations et Travaux (in press)>
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ADC_Keywords: Stars, double and multiple
Description:
This is the second edition of the Catalogue of the Components of
Double and Multiple stars (CCDM). The first one, of which a detailed
description has been given in Communication de l'Observatoire Royal de
Belgique, Serie A, 115, 1994, may be found at the CDS under reference
<I/211>. The complete description of this second edition will be found
in its introduction that will be published (in French and English) in
"Observations et Travaux", a review edited by the Societe Astronomique
de France. A detailed historical sketch of the creation and
development of the catalogue -- which served as double star data base
for the preparation of the HIpparcos Input Catalogue <I/196> -- has
been published in issue 25, pp.29-31 (1999) of this same review.
There are no fundamental differences between the two editions: format,
presentation and construction are similar. The main difference lies in
the important increase of the considered systems of which number
expands from 34.031 to 49.325. Few additions exist in the description
of the contents of the various columns (see table 1) and some new
codes had to be used for references to astronomical positions,
especially related to the introduction of new Hipparcos systems or
components to known systems (see the "refpos.dat" file). Concerning
the names of the systems in columns 16 to 22, one has also to mention
some additions to those given in the INDEX-WDS (C.E.Worley, 1984).
They are:
AOT = Oss. di Torino
ACG = Astr.Cat.Greenw.
BAC = P.Bacchus
BEW = U.Bastian et al.
CRI = F.Crifo
DUF = M.Duflot
DYL = J. Doyle
HDS = Hipparcos
JRN = A. Jorissen
JKS = M.P.Jenniskens
KZA = S.M.Kazeza
LMP = P.Lampens
LYS = L. Louys
MCO = McCormick
NYS = O.Nys
ONL = Occult. News Letters
PWS = Th.Pauwels
RSU = M.Rousseau
SLE = G.Soulie
VHS = P.Verhas
Note that:
MAL = McAlister in WDS 1984
MCA = McAlister in WDS 1994
Some changes have finally been brought to the names of particular STT
and STF systems (App) as shown here, to avoid some confusion that
exists with the non (App) systems:
--> For STF (App)I, addition of 4000, i.e.
STF 4001 instead of STF 1(App)I
STF 4002 instead of STF 2(App)I
...............
STF 4060 instead of STF 60(App)I
--> For STF (App)II, addition of 5000, i.e.
STF 5003 instead of STF 3(App)II
...............
STF 5012 instead of STF 12(App)II
--> For STT (App)I, addition of 4000, i.e.
STT 4001 instead of STT 1(App)
STT 4005 instead of STT 5(App)
...............
STT 4256 instead of STT 256(App)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ccdm.dat 132 105838 The Catalogue of Components of Double and Multiple
refpos.dat 88 37 Reference for positions and proper motions
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See also:
I/211 : CCDM (Components of Double and Multiple stars) (previous version)
I/260 : Visual Double Stars in Hipparcos (Dommanget+, 2000)
I/237 : The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)
Byte-by-byte Description of file: ccdm.dat
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Bytes Format Units Label Explanations
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2- 11 A10 --- CCDM (Catalogue of the Components of the
Double and Multiple stars) number (1)
12 A1 --- rComp [B-Z?] Reference component (blank if A) (6)
13 A1 --- Comp [A-Z?] Concerned component (6)
14 A1 --- Note1 [*&] *=orbit in Dommanget's personal catalog
&=orbit WDS 1994 (2)
15 A1 --- Note2 [@%] @ = astrometric binary
% = astrometric binary from Hipparcos
16- 22 A7 --- Disc Name of the pair (Discoverer and Number) (3)
24- 30 F7.2 s dRAs ? Remainder of RA in second of time (J2000)
31- 37 F7.1 arcsec dDEs ? Remainder of DE in arcsecond (J2000)
39- 40 I2 --- r_dRAs ? Source code for positions, in refpos.dat
42- 45 I4 yr Year ? Year of measured relative position
47- 49 A3 deg theta Position angle (degrees) (4)
50- 55 F6.1 arcsec rho ? angular separation of Comp along theta
57- 58 I2 --- Obs ? for A component: number of components;
other component: number of measurements
60- 63 F4.1 mag Vmag ? magnitude
65- 66 A2 --- Sp Spectral type
67 A1 --- pmNote [*@$#] Origin of the proper motion (7)
68- 72 I5 mas/yr pmRA ? annual proper motion in 0"001
73- 77 I5 mas/yr pmDE ? annual proper motion in 0"001
78- 87 A10 --- DM First identification = DM
(Harvard system) (5)
88- 97 A10 --- Name2 Second identification (5)
99-104 A6 --- HD HD designation
105-106 A2 --- m_HD [/0-9 ?*] second HD (Example: 131843/4) (8)
107-112 A6 --- ADS/BDS ADS number (A) or BDS number (B)
113 A1 --- m_ADS/BDS [aN] suffix (a) to an inserted ADS number,
or a note (N) exists in the Index.
114 A1 --- n_IDS [*W] The * means that the Index number was
built for a new component or system;
the W indicates a WDS (1994) identifier
115-125 A11 --- IDS Original Index designation (1976.5; based on
equinox 1900) and identification letter;
127-132 I6 --- HIC ? Hipparcos Input Catalogue (Turon et al.,
Cat. <I/196>) number (also HIP <I/239>)
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Note (1): The CCDM number is made with RA(2000) limited to 0.1 minute of
time (HHMMm) and Dec(2000) limited to 1 minute of a degree (+DDMM).
Full details about the construction of the CCDM number are given in
the publication.
Note (2): The personal catalogue of J.Dommanget (1982; partially updated
to 1994) to which were added the Hipparcos stars in the
Information Circulars of IAU Commission 26.
Note (3): In addition to the discoverer's names listed in the WDS
(see e.g. files refs.dat in Cat. <I/237>), the list of the new names
are in the "Description" section above
Note (4): The following letters are sometimes used to indicate an
approximate location of the secondary component:
'N' (to the North)
'NF'(to the North and following) (first quadrant)
'F' (following)
'SF'(to the South and following) (second quadrant)
'S' (to the South)
'SP'(to the South and preceding) (third quadrant)
'P' (preceding)
'NP'(to the North and preceding) (fourth quadrant)
Note (5): a suffix code indicates the catalogue, as:
.0 = BD .6 = AGK2/3
.2 = CD .8 = SAO
.4 = CPD
The suffixes "a" and "b" following some DM designations
appear in place of the dot.
Note (6):
In one record (CCDM 07366-1428) the components are marked by ??
Note (7): the origin of the proper motions is flagged by:
*: not the pm from the Index;
@: pm from the HIC (Hipparcos Input Catalog <I/196>);
$: pm = relative pm(B/A);
#: pm unknown, but much different from pm of the other components
Note (8): the question mark (?) indicates a doubtful HD identifier,
and the asterisk (*) indicates a possible inversion of HD identifiers.
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Byte-by-byte Description of file: refpos.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- RefNum Reference number
5- 43 A39 --- posRef Reference for astrometric position
45- 54 A10 --- Epoch Epoch of position (1)
58- 88 A31 --- pmRef Reference for proper motions.
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Note (1): the mean epoch was retained for epoch ranges followed
by an asterisk (*), e.g. 1889-1898*
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(End) J. Dommanget [Obs. Royal Bruxelles] 09-Mar-2002