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J/A+AS/106/339    Photometry of open cluster NGC 5606  (Vazquez+ 1994)
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Deep photometry in the core of the open cluster NGC 5606
       Vazquez R.A., Baume G., Feinstein A., Prado P.
      <Astron. Astrophys. Suppl. Ser. 106, 339 (1994)>
      =1994A&AS..106..339V      (SIMBAD/NED Reference)
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ADC_Keywords: Clusters, open; Photometry, UBVRI
Keywords: open cluster: NGC 5606 - stars: mass function - HR diagram

Abstract:
   The center of the open cluster NGC 5606 has been re-observed with broad 
   band UBVRI CCD photometry. Up to V = 18.5 likely cluster members are found 
   underlining a sharp but not so populated cluster sequence. With this new 
   photometry the cluster distance modulus is stated in V_0_-M_v_=11.90 
   (d=2400pc). The mean colour excess reaches the value <E_B-V_>=0.51. The 
   age of the cluster from the isochrone fitting is between 6.3x10^6^ and 
   7x10^6^ y. Surprisingly enough there are not many stars found below V=15.5 
   in spite of the fact that we are observing the very core of the cluster. 
   This lack of faint cluster stars produces in turn a flat slope for the 
   cluster mass spectrum. In this respect our computation yields x=1.09 far 
   enough of x=1.35 which is assumed to be the slope characterizing the mass 
   spectrum of galactic stars. 

File Summary:
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 FileName    Lrecl    Records    Explanations
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ReadMe          80          .    This file
table3          66        152    Observed colours and magnitudes in NGC 5606
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Byte-by-byte Description of file: table3
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   Bytes Format  Units   Label    Explanations
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   1-  3  I3     ---     Nb       Adopted sequential number
   5-  6  I2     ---     V&F      []? Vasquez & Feinstein identification number
   8- 13  F6.2   pix     X        X position
  16- 21  F6.2   pix     Y        Y position
  24- 29  F6.3   mag     V        V magnitude
  30- 31  A2     ---   u_V        [: ] uncertainty flag on V (1)
  33- 38  F6.3   mag     U-B      []? U-B colour
  39- 40  A2     ---   u_U-B      [: ] uncertainty flag on U-B (1)
  42- 47  F6.3   mag     B-V      B-V colour
  48- 49  A2     ---   u_B-V      [: ] uncertainty flag on B-V (1)
  51- 56  F6.3   mag     V-R      V-R colour
  57- 58  A2     ---   u_V-R      [: ] uncertainty flag on V-R (1)
  60- 64  F5.3   mag     V-I      []? V-I colour
  65- 66  A2     ---   u_V-I      [: ] uncertainty flag on V-I (1)
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Note (1):
    A colon (:) suggests combined errors from 0.07 to 0.10,
    a double colon (::) indicates errors larger than 0.10.

References:
     Vasquez R.A., Feinstein A., 1991, A&AS, 87, 383
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(End)                                         Patricia Bauer [CDS]   28-Jul-1994