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J/MNRAS/415/1355    UBV(RI)c photometry of NGC 4852          (Ahumada+, 2011)
Early-type stars in the open cluster NGC 4852.
    Ahumada J.A., Giorgi E.E., Solivella G., Vazquez R.A.
   <Mon. Not. R. Astron. Soc., 415, 1355-1365 (2011)>
   =2011MNRAS.415.1355A
ADC_Keywords: Clusters, open ; Photometry, UBVRI

Keywords: stars: early-type - stars: emission-line, Be -
          open clusters and associations: general -
          open clusters and associations: individual: NGC 4852 -
          Galaxy: structure

Abstract:
    The southern open cluster NGC 4852 was re-observed in the UBVRI
    passbands to refine its intrinsic fundamental parameters. An extended
    spectral coverage was also undertaken aimed at obtaining a clear
    picture of the kind of stars inhabiting the cluster upper main
    sequence.

Description:
    The field of NGC 4852 was observed at the Cerro Tololo Inter-American
    Observatory (CTIO, Chile) with the 1-m (ex YALO, now operated by the
    SMARTS Consortium) telescope and the Y4K Camera1 (Y4KCam) of the Ohio
    State University. The filters provided include a Johnson-Cousins
    BVRI set plus a U+ CuSO4 filter. The cluster was observed on two
    nights (2006 April 22-23 and 23-24).
Objects:
    -----------------------------------------------
       RA   (2000)   DE     Designation(s)
    -----------------------------------------------
     13 00 09   -59 36.8    NGC 4852 = Cl VDBH 143
    -----------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table3.dat        95     3334   Photometric observations of NGC 4852
table5.dat        57       40   Spectral types in NGC 4852
notes.dat         78       28   Individual notes


See also:
   J/A+A/436/527 : UBVIc photometry of NGC 4852 (Carraro+, 2005)


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label     Explanations

   1-  5  I5    ---     Seq       Sequential number (1)
   7- 14  F8.2  pix     Xpos      ? X position (2)
  16- 23  F8.2  pix     Ypos      ? Y position (2)
  25- 30  F6.3  mag     Vmag      Johnson V magnitude
  33- 37  F5.3  mag     e_Vmag    rms uncertainty on Vmag
  39- 44  F6.3  mag     B-V       ? Johnson B-V colour index
  47- 51  F5.3  mag     e_B-V     ? rms uncertainty on B-V
  53- 58  F6.3  mag     U-B       ? Johnson U-B colour index
  61- 65  F5.3  mag     e_U-B     ? rms uncertainty on U-B
  68- 72  F5.3  mag     V-Ic      ? Johnson-Cousins V-I colour index
  75- 79  F5.3  mag     e_V-Ic    ? rms uncertainty on V-Ic
  81- 86  F6.3  mag     V-Rc      ? Johnson-Cousins V-R colour index
  89- 93  F5.3  mag     e_V-Rc    ? rms uncertainty on V-Rc
      95  I1    ---     N         [1/2]? Number of nights

Note (1): The five stars numbered from 10001 to 10005 in Fig.1 and listed at
   the end of Table 3 deserve a comment. The bright stars 10001 (HD 112852) and
   10003 are in the field observed at the CTIO, but they could not be measured
   because of saturation; the other three stars are outside the observed region.
   Since it was desirable to have photometry of these stars as they are included
   in our spectroscopic survey.
Note (2): Scale: 0.289arcsec/pixel. North is up and East is left.
          Identified stars (in the text):
     ------------------------------------------------------------------------
        Seq    Name                 RA  (J2000)  DE        (Xpos        Ypos)
     ------------------------------------------------------------------------
           1 = HD 112825         13 00 23.89 -59 41 07.56  (-435.21  -928.60)
           3 = LS 2867           13 00 45.23 -59 35 53.52  (-995.13   161.55)
           4 = CP -58 4630       12 59 56.4  -59 37 37     ( 318.97   117.70)
           5 = CP -58 4626       13 22 13.4  -59 13 14     ( 770.53   763.81)
           9 = Wray 15-1039      12 59 33.41 -59 35 58.75  ( 895.30   139.25)
          21 = CP -58 4632       13 00 10.1  -59 35 37     (  82.62   361.41)
       10001 = HD 112852         13 00 34.30 -59 34 51.72
     ------------------------------------------------------------------------


Byte-by-byte Description of file: table5.dat

   Bytes Format Units   Label     Explanations

   1-  5  I5    ---     Seq       Star sequential number
   7- 13  A7    ---     SpType    MK spectral type
  15- 19  F5.2  mag     Vmag      Johnson V magnitude
  21- 25  F5.2  mag     E(B-V)    B-V colour excess
  27- 31  F5.2  mag     E(U-B)    U-B colour excess
  33- 37  F5.2  mag     VMAG      Absolute V magnitude
  39- 43  F5.2  mag     MOD       Distance modulus (VMAG-Vmag)
  45- 48  I4    pc      Dist      Heliocentric distance
  50- 52  I3    pc      e_Dist    rms uncertainty on Dist
  54- 55  A2    ---     Rem       Remarks (1)
      57  A1    ---     n_Seq     [*] indicates a note in notes.dat file

Note (1): Remarks on the membership to NGC 4852 ('m', 'm?', 'nm') or to a
     farther association ('OB', see Section 5), for stars earlier than A1.


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

   Bytes Format Units   Label     Explanations

   1-  5  I5    ---     Seq       Sequential number
   7- 78  A72   ---     Note      Text of the note


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    27-Feb-2012