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Detailed Description of I/280B
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Individual files can be fetched (via http) from
here
or via ftp from: ftp://cdsarc.u-strasbg.fr/pub/cats/I/280B
The catalogue can be queried from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=I/280B
This standardized document follows the rules of the Standard Description for Astronomical Catalogues. For those having to work on this catalogue using FORTRAN programs, this ReadMe file can be transformed into a f77-compliant program which reads the files making up this catalogue, in two versions: either a f77 program loading whole files into arrays, or a f77-program reading each data file line by line.
I/280B All-sky Compiled Catalogue of 2.5 million stars (Kharchenko+ 2009)
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All-sky Compiled Catalogue of 2.5 million stars (ASCC-2.5, 3rd version)
Kharchenko N.V., Roeser S.
<Kinematics and Physics of Celestial Bodies. 17, 409 (2001)>
=2001KFNT...17e.409K
================================================================================
ADC_Keywords: Combined data; Positional data; Proper motions;
Parallaxes, trigonometric; Photometry; Spectral types;
Stars, variable; Stars, double and multiple; Cross identifications
Description:
The All-Sky Compiled Catalogue of 2501313 stars (ASCC-2.5) with the
limiting magnitude V=12-14 is a result of a merging of star lists from
present day large high-precision catalogues from space (Hipparcos-
Tycho family catalogues: Hipparcos main catalogue including Multiple
System Annex [I/239], Tycho-1 [I/239], Tycho-2 [I/259], ACT-RC [I/246],
TRC [I/250]) and ground-based (PPM-N [I/146], PPM-S [I/193], PPM-add
[I/208], CMC11 [I/256]) observations and reduction to standard systems
of corresponding stellar data. The data from the Tycho-2 Spectral Type
Catalog [III/231], and the 2MASS All-Sky Catalog of Point Sources
[II/246] are added.
The basic stellar data presented in the ASCC-2.5 are the equatorial
coordinates (J2000, epoch 1991.25), proper motions in the Hipparcos
system, B and/or V stellar magnitudes in the Johnson system.
Additionally, for some stars we give trigonometric parallaxes,
spectral classes in the MK or HD system, multiplicity and variability
flags, Hipparcos, Tycho-2, HD, DM designations.
Equatorial coordinates and their standard errors were taken from
the source catalogues in accordance with the priority: Hipparcos
[I/239/hip_main], Tycho-2 [I/259], Tycho-1 [I/239/tyc_main], CMC11
[I/256], PPM [I/146,I/193,I/208].
Proper motions from the source catalogues were compared with Hipparcos
data.The compiled proper motions in the Hipparcos system and their
standard errors were computed as the weighted means. The weights were
set in accordance with the proper motion errors listed for individual
stars in the source catalogues.
Trigonometric parallaxes are taken from the Hipparcos and Tycho-1
catalogues.
Stellar B, V magnitudes were determined on the basis of the ground-
based photometric data taken from CMC11, Hipparcos, as well as space
BT, VT from Tycho-1, Tycho-2. Magnitudes from the PPM catalogue were
used if no other photometric data were available. Tycho data were
transformed to the Johnson system via:
V = VT - 0.09 (B-V)T + dV,
(B-V) = 0.850 (B-V)T + d(B-V),
i.e. using the recommendations from the Introduction to the Tycho
catalogue and including additional corrections dV and d(B-V). These
additional corrections were determined by comparison with ground-based
data in the Johnson system. These corrections depend non-linearly on
colour and reach 0.02 and 0.04 mag, respectively.
Infrared stellar magnitudes J, H, Ks and their errors were copied
from the 2MASS catalogue.
Spectral classes in the MK or HD systems were taken from Hipparcos,
CMC11, PPM, and Tycho-2 Spectral Type catalogues.
Multiplicity and variability flags were taken from Tycho-1, Tycho-2,
Hipparcos, CMC11, and PPM catalogues.
The 1st version of the ASCC-2.5 contained some errors in the zones
-1 to +1 degree which have been corrected (see details in the
"History" section below). The 2nd version included a new file
(ccadd.dat) containing the previously missing stars (including
components of multiple systems). Note that the ASCC numbers did not
change between the two versions, but additional numbers (2600001 to
2603318) were assigned. In the present 3rd version of the ASCC-2.5
the stars from file ccadd.dat are inserted in the basic files in
accordance with their coordinates.
Stars in the ASCC-2.5 are divided into 30 files ordered by declination
(North and South polar caps and 28 bands of 5 degrees width), then
sorted in order of right ascension within each file.
File Summary:
FileName Lrecl Records Explanations
× ReadMe 80 . This file
× ccp70.dat 210 66455 Declination from +70.0 to +90.0
× ccp65.dat 210 34036 Declination from +65.0 to +69.99999999
× ccp60.dat 210 53853 Declination from +60.0 to +64.99999999
× ccp55.dat 210 71473 Declination from +55.0 to +59.99999999
× ccp50.dat 210 71054 Declination from +50.0 to +54.99999999
× ccp45.dat 210 75896 Declination from +45.0 to +49.99999999
× ccp40.dat 210 80855 Declination from +40.0 to +44.99999999
× ccp35.dat 210 95204 Declination from +35.0 to +39.99999999
× ccp30.dat 210 99125 Declination from +30.0 to +34.99999999
× ccp25.dat 210 92233 Declination from +25.0 to +29.99999999
× ccp20.dat 210 89927 Declination from +20.0 to +24.99999999
× ccp15.dat 210 83973 Declination from +15.0 to +19.99999999
× ccp10.dat 210 87285 Declination from +10.0 to +14.99999999
× ccp05.dat 210 92968 Declination from +05.0 to +09.99999999
× ccp00.dat 210 88324 Declination from +00.0 to +04.99999999
× ccm00.dat 210 79059 Declination from -00.0 to -04.99999999
× ccm05.dat 210 80228 Declination from -05.0 to -09.99999999
× ccm10.dat 210 84242 Declination from -10.0 to -14.99999999
× ccm15.dat 210 92146 Declination from -15.0 to -19.99999999
× ccm20.dat 210 96530 Declination from -20.0 to -24.99999999
× ccm25.dat 210 97266 Declination from -25.0 to -29.99999999
× ccm30.dat 210 97367 Declination from -30.0 to -34.99999999
× ccm35.dat 210 94279 Declination from -35.0 to -39.99999999
× ccm40.dat 210 97934 Declination from -40.0 to -44.99999999
× ccm45.dat 210 98339 Declination from -45.0 to -49.99999999
× ccm50.dat 210 95810 Declination from -50.0 to -54.99999999
× ccm55.dat 210 94963 Declination from -55.0 to -59.99999999
× ccm60.dat 210 80770 Declination from -60.0 to -64.99999999
× ccm65.dat 210 57389 Declination from -65.0 to -69.99999999
× ccm70.dat 210 72330 Declination from -70.0 to -90.0
See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
I/246 : The ACT Reference Catalog (Urban+ 1997)
I/250 : The Tycho Reference Catalogue (Hog+ 1998)
I/146 : Positions and Proper Motions - North (Roeser+, 1988)
I/193 : Positions and Proper Motions - South (Bastian+ 1993)
I/208 : The 90000 stars Supplement to the PPM Catalogue (Roeser+, 1994)
I/256 : Carlsberg Meridian Catalogs (CMC, 1999)
III/231 : The Tycho-2 Spectral Type Catalog (Wright+, 2003)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
Byte-by-byte Description of file: cc*.dat
Bytes Format Units Label Explanations
1- 12 F12.9 h RAhour Right Ascension J2000.0, epoch 1991.25
14- 25 F12.8 deg DEdeg Declination J2000.0, epoch 1991.25
27- 30 I4 0.1mas e_RAhour Standard error in RA*cos(DEdeg)
32- 35 I4 0.1mas e_DEdeg Standard error in DEdeg
37- 42 I6 0.01mas Plx *?=999999 Trigonometric parallax
44- 48 I5 0.01mas e_Plx *?=99999 Standard error in Plx
50- 56 I7 0.01mas/yr pmRA Proper Motion in RA*cos(DE)
58- 64 I7 0.01mas/yr pmDE Proper Motion in Declination
66- 70 I5 0.01mas/yr e_pmRA Standard error in pmRA
72- 76 I5 0.01mas/yr e_pmDE Standard error in pmDE
78- 82 I5 mmag Bmag *?=99999 B magnitude in Johnson system
84- 88 I5 mmag Vmag *?=99999 V magnitude in Johnson system
90- 93 I4 mmag e_Bmag *?=9999 Standard error on Bmag
95- 98 I4 mmag e_Vmag *?=9999 Standard error on Vmag
100-103 I4 mmag Scat *?=9999 Scatter on V_T_ or Hp mag
105 A1 --- v1 *[GN ] Known variability from GCVS/NSV
106 A1 --- v2 *[UVW ] Variability from Tycho-1
107 A1 --- v3 *[CDMPRU ] Variability type
108 A1 --- v4 *[VYIXR ] Variability from CMC11
109-110 A2 --- d12 *[A-S ] CCDM component identifier
111 A1 --- d3 *[A-S ] Component identifier
112 A1 --- d4 *[DRSYZ ] Duplicity from Tycho-1
113 A1 --- d5 *[CGOVX ] Double/Multiple Systems flag
114 A1 --- d6 *[D ] Duplicity flag from PPM
116-135 A20 --- SpType *Spectral type in MK or HD system
137-140 I4 --- TYC1 *?=0 TYC1 number from Tycho-2
141-145 I5 --- TYC2 *?=0 TYC2 number from Tycho-2
146 I1 --- TYC3 *?=0 TYC3 number from Tycho-2
148-153 I6 --- HIP *?=0 Hipparcos number
155-160 I6 --- HD *?=0 HD number
162-169 I8 --- DM *?=0 DM number
171-177 I7 --- ASCC *[1,2603318] ASCC-2.5 number
179-183 I5 mmag Jmag *?=99999 J magnitude from 2MASS
185-188 I4 mmag e_Jmag *?=9999 Standard error on J magnitude
190-194 I5 mmag Hmag *?=99999 H magnitude from 2MASS
196-199 I4 mmag e_Hmag *?=9999 Standard error on H magnitude
201-205 I5 mmag Kmag *?=99999 K_s magnitude from 2MASS
207-210 I4 mmag e_Kmag *?=9999 Standard error on K_s magnitude
Note on Plx:
Substituted with 999999 if no data
Note on e_Plx:
Substituted with 99999 if no data
Note on Bmag, Vmag, Jmag, Hmag, Kmag:
Substituted with 99999 if no data
Note on e_Bmag, e_Vmag, Scat, e_Jmag, e_Hmag, e_Kmag:
Substituted with 9999 if no data
Note on v1:
Byte 292 from Tycho-1 file tyc_main.dat
This flag is set when the variability is known:
G = variable known in General Catalog of Variable Stars
N = variable known in New Suspected Variables catalog
Substituted with blank if no data
Note on v2:
Byte 294 from Tycho-1 file tyc_main.dat
This flag has the following meaning:
U = apparent variability in the Tycho data; may be due to duplicity
V = strong evidence of intrinsic variability
W = suspected intrinsic variability
Substituted with blank if no data
Note on v3:
Byte 322 from Hipparcos file hip_main.dat
Hipparcos-defined type of variability (a blank entry signifies
that the entry could not be classified as variable or constant):
C = no variability detected ("constant")
D = duplicity-induced variability
M = possibly micro-variable (amplitude < 0.03mag)
P = periodic variable
R = V-I colour index was revised due to variability analysis
U = unsolved variable which does not fall in the other categories
Substituted with blank if no data
Note on v4:
Flag from CMC11 catalogue
V = variable star
Y or I = if the CAMC did not measure the mag, an approximate value
from other sources is given to a precision of 0.1 mag
X or R = star fainter than 12 with unknown mag is given as 12.
Substituted with blank if no data
Note on d12:
Bytes 149, 150 from Tycho-2 file catalog.dat.
The CCDM component identifiers for double or multiple Hipparcos stars
contributing to this Tycho-2 entry.
Substituted with blank if no data
Tycho-2 byte 151 with the third component is not included. This byte
contains data (equal to "C") for two stars of the ASCC-2.5 No 244181
(ccp50.dat) and No 339869 (ccp45.dat) only.
Note on d3:
Byte 41 from Hipparcos file hipdmcom.dat
Substituted with blank if no data
Note on d4:
Byte 296 from Tycho-1 file tyc_main.dat
Unresolved duplicity status from Tycho data analysis:
D = duplicity clearly indicated (B_Tmag and V_Tmag refer to
combined light)
R = duplicity weakly indicated, combined with indication of
variability
S = duplicity suspected
Y = investigation for duplicity carried out on Tycho data,
no indication of duplicity was found
Z = investigation for duplicity not carried out
blank = Hipparcos star not observed by Tycho
Substituted with blank if no data
Note on d5:
Byte 347 from Hipparcos file hip_main.dat
Indicates that further details are given in the Hipparcos Double
and Multiple Systems Annex:
C = solutions for the components
G = acceleration or higher order terms
O = orbital solutions
V = variability-induced movers (apparent motion arises from
variability)
X = stochastic solution (probably astrometric binaries with short
period)
Substituted with blank if no data
Note on d6:
Some multiple stars are not resolved in the PPM and/or CMC11
catalogues into separate components and are given in these catalogues
as single stars with a flag "D". Sometimes (especially at large PM)
such stars were not identified with resolved components from other
catalogues, and are present in the ASCC as additional (false)
component. Substituted with blank if no data
Note on SpType:
Substituted with blank if no data
Note on TYC1, TYC2, TYC3, HIP, HD:
Substituted with 0 if no data
Note on DM:
DM = Zone sign and abs(Zone)*100000 + running number within this Zone
Substituted with 0 if no data
Note on ASCC:
Stars are numbered from 1 to 2501977 (as in the first version,
in agreement with the file order indicated in the File Summary)
and from 2600001 to 2603318 (new stars in the 2nd version).
History:
* 21-Aug-2002 (date of the first release)
* 18-Jun-2003: Version 'A'
The 1st version of the ASCC-2.5 (21-Aug-2002) contains some errors:
- 3982 false stars were detected at Dec = 0 ... +1 degrees. In
the 2nd version of the ASCC-2.5 these stars were excluded from
the file ccp00.dat. The corrected file ccp00.dat supersedes
the previous file ccp00.dat and contains 88230 stars.
- for 3948 stars at Dec = 0 ... -1 degrees the PPM data were
missed during the catalogue compilation. In the 2nd version
the missed data were added and corresponding stellar data were
recompiled. The corrected file ccm00.dat supersedes the previous
file ccm00.dat and contains the same number of stars.
- 34 stars with PPM-only data were missed in zone Dec = 0 ... -1.
They were included in a new file of additional catalogue
objects ccadd.dat.
Besides, 3284 components of multiple systems from all over the sky
were included in the catalogue. These stars and their compiled
stellar data are placed in the file ccadd.dat of version 'A'.
* 12-Aug-2009: Version 'B'
Stars from file ccadd.dat are placed into the basic files in
accordance of their declinations.
The spectral types from The Tycho-2 Spectral Type Catalog were added.
The cross-correlation with the 2MASS catalogue was carried out and
stellar magnitudes J, H, Ks were added.
References:
Bastian U., Roeser S., 1993, "PPM Star Catalogue, 3, 4", Spectrum
Akademischer Verlag, Heidelberg (PPM-S) (Cat. I/193)
Carlsberg Meridian Catalogue La Palma Numbers 1 to 11,
"Observations of positions of stars and planets: May 1984 to May 1998",
1999, Copenhagen University Observatory, Royal Greenwich
Observatory and Real Instituto y Observatorio de la Armada en
San Fernando, CD-ROM distribution (CMC11) (Cat. I/256)
ESA, 1997, "The Hipparcos and Tycho Catalogues", ESA SP-1200, 17
(Hipparcos: files I/239/hip_main.dat and I/239/hipdmcom.dat),
(Tycho-1: file I/239/tyc_main.dat)
Hog E., Kuzmin A., Bastian U., et al., 1998, "The Tycho Reference
Catalogue", AA, 335, N 3, L65-L68 (TRC) (Cat. I/250)
Hog E., Fabricius C., Makarov V.V., Urban S.E., Corbin T.E., Wycoff G.L.,
Bastian U., Schwekendiek P., Wicenec A, 2000, "The Tycho-2 Catalogue:
Positions, proper motions and two-color photometry of the 2.5 million
brightest stars", Copenhagen, CD-ROM distribution (Tycho-2) (Cat. I/259)
Kharchenko N.V., 2001, "All-sky Compiled Catalogue of 2.5 million stars",
Kinematics and Physics of Celestial Bodies, 17, N 5, 409-423
(ASCC-2.5) (Cat.I/280)
Roeser S., Bastian U., 1991, "PPM Star Catalogue, 1, 2", Spectrum
Akademischer Verlag, Heidelberg, Berlin, New York (PPM-N) (Cat. I/146)
Roeser S., Bastian U., Kuzmin A., 1994, "The 90000 stars supplement to
PPM", AApSS, 105, N 2, 301-303 (PPM-add) (Cat. I/208)
Skrutskie M.F., Cutri R.M., Stiening M.D. et al., 2006, "The Two Micron
All-Sky Survey (2MASS)", AJ, 131, 1163 (Cat. II/246)
Urban S.E., Corbin T.E., Wycoff G.L., 1998, "The ACT Reference Catalog",
(ACT RC) (1998AJ....115.2161U, Cat. I/246)
Wright C.O., Egan M.P., Kraemer K.E., Price S.D., 2003, "The Tycho-2
Spectral Type Catalog" (2003AJ....125..359W, Cat.III/231 )
Author's Address:
Nina V. Kharchenko Siegfried Roeser
Main Astronomical Observatory ZAH
NAS of Ukraine Astronomisches Rechen-Institut
27 Academica Zabolotnogo Str. 12-14 Moenchhofstrasse
03680 Kiev D-69120 Heidelberg
Ukraine Germany
Voice: +(380)44-266-4768 Voice: (+49)6221 54-1858
Fax: +(380)44-266-2147 Fax: (+49)6221 54-1888
e-mail: nkhar(at)mao.kiev.ua e-mail:
================================================================================
(End) Nina V. Kharchenko [Kiev], Francois Ochsenbein [CDS] 25-Sep-2009
