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HELP: CMT catalogue fields

General Description

  • This catalogue contains all published data from the Carlsberg Meridian Telescope.
  • In the tables below you'll find a description of the individual keywords which you may encounter. The first column is a list of the keyword headings. In the second column a 'Q' means that the keyword appears on the query form and an 'I' means that that particular keyword is indexed in the archive. Searching on at least one indexed keyword will always lead to a faster result. The third column describes the value of each keyword.

KEYWORD DESCRIPTION
CMTcatno Q,I The number of the object in one of the CMT catalogues. A value of 717684 means this is object number 17684 in catalogue number 7.
RA (J2000) Q,I Right Ascension (J2000).
DEC (J2000) Q,I Declination (J2000).
Vmag Q,I Mean Johnson V magnitude.
Var?   A "V" will appear here if the star is variable.
Epoch(ra)   The observation epoch of the RA
Epoch(dec)   The observation epoch of the RA
Nobs(ra)   The number of observations used in RA measurement.
Nobs(dec)   The number of observations used in DEC measurement.
Nobs(mag)   The number of observations used in magnitude measurement.
PF(ra)   The parallax factor in RA
PF(dec)   The parallax factor in DEC
Spec Type Q The spectral type of the star
Durchmusterung   The Durchmusterung number of the star. The number is composed as follows: DM = +/-(N*10000000 + Z*10000 + number) where Z is the Zone, and N is the Durchmusterung in question (N = 1 --> BD, N = 2 --> CoD, N = 3 --> CPD, N = 4 --> DM number added by CDS). E.g, DM = -11905367 translates to BD-19 5367.
Dmcomp   The DM component added by CDS
SAO   The SAO designation for the star
GC   The GC designation for the star
AGK3   The AGK3 designation for the star
HD   The HD designation for the star
ADS   The ADS designation for the star
WDS   The WDS designation for the star
ICMT   An internal CMT designation for the star
Target Name Q,I The name of the object as it was specified in the CMT catalogue or some standard name which will be resolved by SIMBAD or NED.
Target Source Q The user can search for objects by name in two different ways. By default the user specifies a name and either SIMBAD or NED is called to resolve the name and return its J2000 coordinates. The search box is then used to search the catalogue by position for the object. On other hand it is possible to search the object name as the observer entered it. This method doesn't return any positional search box, so a query by the ING target name should be done in conjunction with other restrictions otherwise you could be in for a long wait.
Please send suggestions or problem reports via the feedback form or by email to Jim lewis.