ACDS V10.0 - Detailed Description of II/228A

ACDS V10.0 - Sun Jan 19 09:05:24 CET 2025

| # Detailed Description of II/228A : DENIS Catalogue toward Magellanic Clouds (DCMC) (Cioni+ 2000) |

Note : this is the description file of the original catalog. This HTML page corresponds well to the original description, but some minor changes in the format may have been introduced in the FITS output files in order to allow for arithmetic operations on quantities such as coordinates and times. h:m:s and d:m:s units are normally converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the units; the value given in the HTML files supersedes the value indicated in the ReadMe file for this catalogue.

    II/228A    DENIS Catalogue toward Magellanic Clouds (DCMC)     (Cioni+ 2000)
    ================================================================================
    The DENIS Point Source Catalogue towards the Magellanic Clouds
        Cioni M.-R., Loup C., Habing H.J., Fouque P., Bertin E., Deul E.,
        Egret D., Alard C., de  Batz B., Borsenberger J., Dennefeld M.,
        Epchtein N., Forveille T., Garzon F., Hron J., Kimeswenger S.,
        Lacombe F., Le  Bertre T., Mamon G.A., Omont A., Paturel G., Persi P.,
        Robin A., Rouan D., Simon G., Tiphene D., Vauglin I., Wagner S.
       <Astron. Astrophys. Suppl. Ser., 144, 235 (2000)>
       =2000A&AS..144..235C
    ================================================================================
    ADC_Keywords: Photometry, infrared ; Surveys ; Magellanic Clouds

    Keywords: Catalogs - Surveys - Galaxies: Magellanic Clouds -
              Galaxies: photometry - Galaxies: stellar content - Infrared: stars

    Description:
        This is the first version of a complete near-IR point source catalogue
        towards the Magellanic Clouds extracted from the data obtained with
        the DEep Near Infraread Survey of the Southern Sky (DENIS). The
        catalogue covers an area of 19.87x16 square degrees centered on
        (05:27:20-69:00:00) for the Large Magellanic Cloud (LMC), and 14.7x10
        square degrees centered on (01:02:40-73:00:00) for the Small
        Magellanic Cloud (SMC). It contains the sources detected in at least 2
        of the 3 photometric bands I (Gunn-i centered at 0.8µm), J
        (centered at 1.25µm), and Ks (centered at 2.15µm). The spatial
        resolution is 1" in I and 3" in the J and K bands, and the limiting
        magnitudes are I=18, J=16 and Ks=14. 70% of the detected sources are
        real members of the Magellanic Clouds, and consist mainly of red
        giants, asymptotic giant branch stars and supergiants.

    File Summary:

           FileName      Lrecl  Records   Explanations

    ×                   80        .   This file
    × ReadMe            80        .   This file
    × lmc_ijk.dat      210   264347   LMC stars observed in the 3 bands I, J and K (1)
    × lmc_ij.dat       210  1045630   LMC stars observed in I and J bands (1)
    × lmc_ik.dat       210     8234   LMC stars observed in I and K bands (1)
    × lmc_jk.dat       210     1689   LMC stars observed in J and K bands (1)
    × smc_ijk.dat      210    69829   SMC stars observed in the 3 bands I, J and K (1)
    × smc_ij.dat       210   242837   SMC stars observed in I and J bands (1)
    × smc_ik.dat       210     2302   SMC stars observed in I and K bands (1)
    × smc_jk.dat       210      812   SMC stars observed in J and K bands (1)
    × qual.dat          68      187   Qualities of observation strips (table 8)

    Note (1): table 7 of the paper

    See also:
        http://cdsweb.u-strasbg.fr/denis.html : the DENIS home page
        B/denis : The DENIS database (Epchtein+, 1999)

    Byte-by-byte Description of file:  lmc*.dat  smc*.dat

       Bytes Format Units   Label     Explanations

       1-  4  A4    ---     ---       [DCMC] Catalog Acronym
       6- 24  A19   ---     DCMC      Name of the source (based on J2000 position)
      27- 28  I2    h       RAh       Right Ascension J2000 (hours)
          29  A1    ---     ---       [:]
      30- 31  I2    min     RAm       Right Ascension J2000 (minutes)
          32  A1    ---     ---       [:]
      33- 37  F5.2  s       RAs       Right Ascension J2000 (seconds)
          39  A1    ---     DE-       Declination J2000 (sign)
      40- 41  I2    deg     DEd       Declination J2000 (degrees)
          42  A1    ---     ---       [:]
      43- 44  I2    arcmin  DEm       Declination J2000 (minutes)
          45  A1    ---     ---       [:]
      46- 49  F4.1  arcsec  DEs       Declination J2000 (seconds)
      51- 54  F4.2  arcsec  PosErr    Systematic positional error
      56- 62  F7.3  pix     Ixpos     Object position along x-axis in I image
      64- 70  F7.3  pix     Iypos     Object position along y-axis in I image
      72- 74  I3    ---     Ifield    ?=999 Field number of I image
      76- 79  I4    ---     Istrip    ?=0 Strip number of I image (in field Ifield)
      81- 86  F6.3  mag     Imag      ?=99.0 Magnitude derived within 7" diameter
      88- 93  F6.3  mag     e_Imag    ?=99.0 Mean error in Imag (1)
      95- 97  I3    ---     f_Imag    [0,7] Extraction flags (2)
      99-101  I3    ---     n_Imag    [0,63] Image flags in I band (3)
     103-109  F7.3  pix     Jxpos     Object position along x-axis in J image
     111-117  F7.3  pix     Jypos     Object position along y-axis in J image
     119-121  I3    ---     Jfield    ?=999 Field number of J image
     123-126  I4    ---     Jstrip    ?=0 Strip number of J image (in field Jfield)
     128-133  F6.3  mag     Jmag      ?=99.00 Magnitude derived within 7" diameter
     135-140  F6.3  mag     e_Jmag    ?=99.00 Mean error in Jmag (1)
     142-144  I3    ---     f_Jmag    [0,7] Extraction flags (2)
     146-148  I3    ---     n_Jmag    [0,127] Image flags in J band (3)
     150-156  F7.3  pix     Kxpos     Object position along x-axis in K image
     158-164  F7.3  pix     Kypos     Object position along y-axis in K image
     166-168  I3    ---     Kfield    ?=999 Field number of K image
     170-173  I4    ---     Kstrip    ?=0 Strip number of K image (in field Kfield)
     175-180  F6.3  mag     Kmag      ?=99.00 Magnitude derived within 7" diameter
     182-187  F6.3  mag     e_Kmag    ?=99.00 Mean error in Kmag (1)
     189-191  I3    ---     f_Kmag    [0,7] Extraction flags (2)
     193-195  I3    ---     n_Kmag    [0,127] Image flags in J band (3)
     198-202  F5.2  mag     Bmag      ?=99. Blue magnitude from USNO-A2.0 I/252
     206-210  F5.2  mag     Rmag      ?=99. Red  magnitude from USNO-A2.0 I/252

    Note (1): mean errors are derived from the photon statistics
        within the aperture
    Note (2): the extractions flags are the summation of the following
        exclusive numbers:
        1 = Bright neighbours or bad pixels
            (more than 10  of the integrated area affected)
        2 = The object was originally blended with another
        4 = At least one pixel of the object is saturated
        Some of the very bright sources with the highest extraction flag values
        may suffer from large (>10arcsec) astrometric shift.
    Note (3): the image flags are:
         1 = Regression failed for this pixel
         2 = Flat derived is less than 0.01 (dead pixels)
         3 = Abnormally high flat
         4 = Abnormally high residual after adjustment (5{sigma})
         5 = Bias more than 5{sigma} of mean
         6 = Flat more than 5{sigma} of mean
         9 = Insufficient number of pixels left after iterative clipping
        16 = Flat < 0.7 and/or flux < -200 ADU
        32 = Flat > 1.3 and/or flux > 49500 ADU

    Byte-by-byte Description of file:  qual.dat

       Bytes Format Units   Label     Explanations

       1-  4  I4    ---     Strip     Strip number
       6- 13  A8 "DD/MM/YY" Date      Date of observation
      18- 22  F5.2  mag     Izp       Zero point in I band
      24- 27  F4.2  mag     e_Izp     Standard error on Izp
      30- 34  F5.2  mag     Jzp       Zero point in J band
      36- 39  F4.2  mag     e_Jzp     Standard error on Jzp
      42- 46  F5.2  mag     Kzp       Zero point in K band
      48- 51  F4.2  mag     e_Kzp     Standard error on Kzp
      54- 68  A15   ---     Notes     Value of the photometric shift, and/or
                                       default zero point assumed when "ZP_Idef"

    Acknowledgements:
        It is a pleasure to thank Maria-Rosa Cioni mrcioni@strw.leidenuniv.nl
        and Cecile Loup loup@iap.fr who supplied the data in advance of
        publication.

    History:
      * 11-Apr-2000: First release, which did not contain the magnitudes
        for the strips numbered 0 (concerns 9930 stars in file lmc_ijk.dat)
      * 20-Jun-2000: the strip numbers (Istrip, Jstrip and Kstrip) were set
        to 999 when unknown (instead of 0); the magnitude values for the
        strips numbered zero, previsouly set to 99.00, were re-entered
        correctly in file lmc_ijk.dat.
    ================================================================================
    (End)                                    Francois Ochsenbein [CDS]   20-Jun-2000