I/304 Carlsberg Meridian Catalog 14 (CMC14) (CMC, 2006)
Carlsberg Meridian Catalog Number 14
Copenhagen University Obs.,
Institute of Astronomy, Cambridge, UK,
Real Instituto y Observatorio de la Armada en San Fernando
<Observations from March 1999 to October 2005>
=2006yCat.1304....0C 2006yCat.1304....0C
ADC_Keywords: Meridian observations ; Positional data ; Photometry, CCD
Description:
The Carlsberg Meridian Telescope (formerly the Carlsberg Automatic
Meridian Circle) is dedicated to carrying out high-precision optical
astrometry. It underwent a major upgrade in March 1999, with the
installation of a 2kx2k CCD camera was installed with a Sloan r'
filter operating in a drift scan mode. With the new system, the
magnitude limit is 17 (r'mag) and the positional accuracy is in the
range 35 to 100 mas. The resulting survey is aimed to provide an
astrometric and photometric catalogue in the declination range -30
to +50 degrees.
This catalogue is the result of all the observations made between
March 1999 and October 2005 in the declination band -30 to +50 --
minus a gap between 5h30m and 10h30m for declinations south of -15.
It contains 95,858,475 stars, plus 8,046,291 in the rejected files.
Further information can be found in the documentation (cmc14doc.pdf)
or at the web site http://www.ast.cam.ac.uk/~dwe/SRF/camc.html .
It supersedes the previous versions (Cat. I/282)
A dedicated remote query program (findcmc14) can be downloaded from
http://cdsweb.u-strasbg.fr/doc/cdsclient.html
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
out.sam 101 1000 Sample catalog output (6'x6' centered on 0+0)
rejected.sam 98 12 Sample of the rejected stars in the same region.
cmc14doc.pdf 1 5246369 PDF original documentation
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See also:
http://www.ast.cam.ac.uk/~dwe/SRF/camc.html : Home page for the
Carlsberg Meridian Telescope
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
I/289 : UCAC2 Catalogue (Zacharias+ 2004)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
Byte-by-byte Description of file: out.sam
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Bytes Format Units Label Explanations
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1- 15 A15 --- CMC14 CMC14-Identifier, based on ICRS position (1)
17- 26 F10.6 deg RAdeg Right Ascension ICRS (in mas = 0.01arcsec) (2)
28- 37 F10.6 deg DEdeg Declination ICRS (in mas = 0.01arcsec) (2)
39- 39 A1 meta.code f_CMC14 [*R] when 2 stars share the same name (1)
41- 44 I4 d MJD-51263 Mean epoch of astrometry, as days
since 26-3-1999 (=MJD-51263, or JD-2451263.5)
46- 51 F6.3 mag r'mag CMC magnitude (ABν scale) (3)
53- 53 A1 --- u_r'mag Flag (:) on r'mag when non-photometric
55- 56 I2 --- Nt Total number of observations
58- 59 I2 --- Na Number of astrometric observations
61- 62 I2 --- Np Number of photometric observations
64- 68 F5.3 arcsec e_RAdeg ? Standard deviation of RAmas
70- 74 F5.3 arcsec e_DEdeg ? Standard deviation of DEmas
76- 80 F5.3 mag e_r'mag ? Standard deviation of r'mag
82- 87 F6.3 mag Jmag ? 2MASS J magnitude, Vega scale (4)
89- 94 F6.3 mag Hmag ? 2MASS H magnitude, Vega scale (4)
96-101 F6.3 mag Ksmag ? 2MASS Ks magnitude, Vega scale (4)
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Note (1):
The CMC14 identifier should be preceded by a 'J' (J2000-compatible
position); it represents the position truncated to a precision of
0.1s in RA and 1arcsec in Declination.
The column f_CMC14 contains a 'R' for the file of rejected stars,
and an asterisk for the 2 stars in the non-rejected sample which
share the same name, which are:
CMC14 J181333.6-271851 at 18:13:33.6048-27:18:51.133
and 18:13:33.6676-27:18:51.322
Note (2):
Position on ICRS system, at the epoch indicated in the column MJD-51263.
Note (3): Magnitude close the Sloan r' bandpass
(passband around 550-690nm)
Note (4):
2MASS Point Source catalog, see Cat. II/246, or
http://www.ipac.caltech.edu/2mass/releases/allsky
The magnitudes were set to --- when the 2MASS quality was not 'A'.
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Byte-by-byte Description of file: rejected.sam
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Bytes Format Units Label Explanations
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1- 15 A15 --- CMC14 CMC14-Identifier, based on ICRS position
16 A1 --- f_CMC14 [*R] when 2 stars share the same name
18- 27 F10.6 deg RAdeg Right Ascension ICRS (in mas = 0.01arcsec)
28- 37 F10.6 deg DEdeg Declination ICRS (in mas = 0.01arcsec)
39- 42 I4 d MJD-51263 Mean epoch of astrometry, as days
since 26-3-1999 (=MJD-51263, or JD-2451263.5)
44- 49 F6.3 mag r'mag CMC magnitude (ABν scale)
50 A1 --- u_r'mag Flag (:) on r'mag when non-photometric
52- 53 I2 --- Nt Total number of observations
55- 56 I2 --- Na Number of astrometric observations
58- 59 I2 --- Np Number of photometric observations
61- 65 F5.3 arcsec e_RAdeg ? Standard deviation of RAmas
67- 71 F5.3 arcsec e_DEdeg ? Standard deviation of DEmas
73- 77 F5.3 mag e_r'mag ? Standard deviation of r'mag
79- 84 F6.3 mag Jmag ? 2MASS J magnitude, Vega scale
86- 91 F6.3 mag Hmag ? 2MASS H magnitude, Vega scale
93- 98 F6.3 mag Ksmag ? 2MASS Ks magnitude, Vega scale
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History:
* 25-Sep-2024: format migration (CDS)
(End) Francois Ochsenbein [CDS] 15-Dec-2006