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J/AJ/129/872        Stromgren photometry of NGC 2243     (Anthony-Twarog+, 2005)
uvbyCaHβ CCD photometry of clusters.
V. The metal-deficient open cluster NGC 2243.
    Anthony-Twarog B.J., Atwell J., Twarog B.A.
   <Astron. J., 129, 872-887 (2005)>
   =2005AJ....129..872A
ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, uvby

Keywords: color-magnitude diagrams - open clusters and associations: individual
          (NGC 2243, Berkeley 29, Berkeley 54)

Abstract:
    CCD photometry on the intermediate-band uvbyCaHβ system is
    presented for the metal-deficient open cluster NGC 2243.

Description:
    The new photometric data for NGC 2243 were obtained using the
    Cassegrain-focus CCD imager on the NOAO's 0.9m telescope at CTIO.
    We used a Tektronix 2048x2048 detector at the f/13.5 focus of the
    telescope, with CTIO's 4"x4" uvby filters and our own 3"x3" Hβ
    and Ca filters. The field size is 13.5' on a side. Frames of all seven
    filters were obtained in both 2000 November and 2002 January and were
    preprocessed (bias subtraction, trimming, and flattening) through IRAF
    routines at the telescope.
Objects:
    ----------------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ----------------------------------------------------------
    06 29 34.0   -31 17 00   NGC 2243 = C 0627-312
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat       117     1266   Extended Stromgren photometry in NGC 2243


See also:
  J/AJ/125/1383 : Stromgren photometry of NGC 6253 (Anthony-Twarog+, 2003)


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

   Bytes Format Units     Label     Explanations

   1-  5  I5    ---       Seq       WEBDA primary identification number
   7- 13  F7.2  pix       Xpos      WEBDA X pixel coordinate (1)
  15- 21  F7.2  pix       Ypos      WEBDA Y pixel coordinate (1)
  23- 28  F6.3  mag       Vmag      The V-band magnitude
  30- 34  F5.3  mag       b-y       The Stromgren (b-y) color index
  36- 41  F6.3  mag       m1        ? The Stromgren m1 index magnitude
  43- 48  F6.3  mag       c1        ? The Stromgren c1 index magnitude
  50- 54  F5.3  mag       beta      ? The Hβ index magnitude
  56- 60  F5.3  mag       hk        ? The hk index magnitude [(Ca-b) - (b-y)]
  62- 66  F5.3  mag       e_Vmag    Standard error of the mean in Vmag
  68- 72  F5.3  mag       e_b-y     Standard error of the mean in b-y
  74- 78  F5.3  mag       e_m1      Standard error of the mean in m1
  80- 84  F5.3  mag       e_c1      Standard error of the mean in c1
  86- 90  F5.3  mag       e_beta    Standard error of the mean in beta
  92- 96  F5.3  mag       e_hk      Standard error of the mean in hk
  98- 99  I2    ---       Ny        Number of y band frames
 101-102  I2    ---       Nb        Number of b band frames
 104-105  I2    ---       Nv        Number of v band frames
 107-108  I2    ---       Nu        Number of u band frames
 110-111  I2    ---       Nw        Number of w band frames
 113-114  I2    ---       Nn        Number of n band frames
 116-117  I2    ---       NCa       Number of Ca band frames

Note (1): The coordinates for the cluster center are: α=06 29 35.18,
          δ=-31 17 06.6, and the pixel angular size is: 0.61".


History:
    From electronic version of the journal

References:
  Anthony-Twarog & Twarog, Paper I   2000AJ....119.2282A
  Anthony-Twarog & Twarog, Paper II  2000AJ....120.3111A
  Twarog et al.,           Paper III 2003AJ....125.1383T, Cat. J/AJ/125/1383
  Anthony-Twarog & Twarog, Paper IV  2004AJ....127.1000A
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    30-Aug-2005