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J/AJ/114/2644       UBVRIHa photometry of NGC2264            (Sung+, 1997)
UBVRI H-α photometry of the young open cluster NGC 2264.
    Sung H., Bessell M.S., Lee S.-W.
   <Astron. J., 114, 2644-2657 (1997)>
   =1997AJ....114.2644S
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Photometry, UBVRI ;
              Photometry, H-alpha ; Photometry, CCD

Abstract:
    UBVRI Hα CCD photometry has been obtained fro the young cluster
    NGC 2264. Using (R-Hα) color, a measure of Hα emission, we
    selected member stars in the pre-main sequence (PMS) stage.

Description:
    UBVRI Hα CCD photometry was performed on two nights during the
    1997 Feb 28 and March 4 observing run at Siding Spring Observatory
    with the 40" telescope (f/8) and a thinned Site 2048x2048 CCD.
Objects:
    --------------------------------------------
       RA  (2000)  DE       Designation(s)
    --------------------------------------------
    06 40 58.7  +09 53.7    NGC 2264 = OCl 495
    --------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat       115      609   Photometric data of the cluster NGC 2264.


See also:
   J/A+A/355/651 : HRI observations of PMS stars in NGC 2264 (Flaccomio+, 2000)
   J/AJ/123/1528 : UBV(RI)C and JHK photometry in NGC 2264 (Rebull+, 2002)
   J/A+A/417/557 : Rotation + variability of PMS Stars in NGC 2264 (Lamm, 2004)
   J/AJ/127/1117 : Halpha emission-line stars in NGC2264 (Reipurth+, 2004)
   J/AJ/127/2228 : VRI photometry of PMS stars in NGC 2264 OB (Makidon+, 2004)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1-  3  I3    ---     SBL       Sequential number,
                                   Cl* NGC 2264 SBL NNN in Simbad
   5- 11  F7.3  arcmin  dRA       Offset in right ascension (1)
  13- 19  F7.3  arcmin  dDE       ? Offset in declination (1)
      21  I1    ---     o_Vmag    Number of observations in V band
  23- 28  F6.3  mag     Vmag      V magnitude
  30- 34  F5.3  mag     e_Vmag    rms uncertainty in Vmag
      36  I1    ---     o_V-I     Number of observations in V band
  38- 43  F6.3  mag     V-I       ? V-I colour index
  45- 49  F5.3  mag     e_V-I     ? rms uncertainty in V-I
      51  I1    ---     o_B-V     Number of observations in B-V
  53- 58  F6.3  mag     B-V       ? B-V colour index
  60- 64  F5.3  mag     e_B-V     ? rms uncertainty in B-V
      66  I1    ---     o_U-B     Number of observations in U-B
  68- 73  F6.3  mag     U-B       ? U-B colour index
  75- 79  F5.3  mag     e_U-B     ? rms uncertainty in U-B
      81  I1    ---     o_Ha      Number of observations in Hα
  83- 88  F6.3  mag     R-Ha      ? R-Hα colour index
  90- 94  F5.3  mag     e_R-Ha    ? rms uncertainty in R-Ha
  96-104  A9    ---     SpType    MK spectral type
 106-110  A5    ---     OName     Other name (2)
 112-115  F4.2  ---     Memb      ? Membership probability

Note (1): Offset from NGC 2264 center at 06:40:58.7+09:53.7 (J2000.0).

Note (2): Other name are:
  * V NNN = <Cl* NGC 2264 VAS NN> in Simbad
  * W NNN = <NGC 2264 NNN> in Simbad


History:
  * 03-Apr-2007: From WEBDA (http://www.univie.ac.at/webda/ftp/ocl/ngc2264)
  * 30-Sep-2011: Errors in table1 fixed:
     - SBL=101 corresponds to OName=W52  (not W53)
     - SBL=311 corresponds to OName=W171 (not W174)
(End)                                      Patricia Vannier [CDS]    03-Apr-2007