J/other/NewA/17.160   UBVRI photometry of Stock 18           (Bhatt+, 2012)
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Stellar contents and star formation in the young cluster Stock 18.
    Bhatt H., Sagar R., Pandey J.-C.
   <New Astron., 17, 160-166 (2012)>
   =2012NewA...17..160B
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ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Photometry, CCD
Keywords: young cluster - star formation - mass function -
          mass segregation individual: Stock 18

Abstract:
    We have carried out deep (V~21mag) UBVRI photometric study of the star
    cluster Stock 18. These along with archival Infrared data have been
    used to derive the basic cluster parameters and also to derive the
    basic cluster parameters and also to study the star for formation
    processes in and around the cluster region. The distance to the
    cluster is derived as 2.8+/-0.2kpc while its age is estimated as
    6.0+/-2.0Myr. Present study indicates that interstellar reddening is
    normal in the direction of the cluster. The mass function slope is
    found to be -1.37+/-0.27 for the mass range 1<M/M_{sun}_<11.9. There
    is no evidence found for the effect of mass segregation in
    main-sequence stars of the cluster. A young stellar population with age
    between 1-2Myr have been found in and around the cluster region. The
    presence of IRAS and AKARI sources with MSX intensity map also show
    the youth of the Sh2-170 region.

Description:
    The CCD UBVRI photometric data were acquired using 104-cm
    Sampurnanand Telescope (ST) of ARIES, Nainital, on 08/10/2007 and
    19/12/2006.

File Summary:
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 FileName   Lrecl  Records   Explanations
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ReadMe         80        .   This file
table2.dat     88     2261  *UBVRI photometric data of the sample stars
                             in 13'x13' region
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Note on table2.dat: CCD positions of stars are converted into RAJ2000 and
  DECJ2000 using the Guide Star Catalogue II (GSC 2.2, 2001).
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Byte-by-byte Description of file: table2.dat
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   Bytes Format Units   Label     Explanations
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   1-  4  I4    ---     Seq       [1/2261] Sequential number
   6- 13  F8.6  deg     RAdeg     Right ascension in decimal degrees (J2000)
  15- 23  F9.6  deg     DEdeg     Declination in decimal degrees (J2000)
  25- 30  F6.3  mag     Umag      ?=- Landolt U magnitude
  32- 36  F5.3  mag   e_Umag      ?=- rms uncertainty on Umag
  38- 43  F6.3  mag     Bmag      ?=- Landolt B magnitude
  45- 49  F5.3  mag   e_Bmag      ?=- rms uncertainty on Bmag
  51- 56  F6.3  mag     Vmag      ?=- Landolt V magnitude
  58- 62  F5.3  mag   e_Vmag      ?=- rms uncertainty on Vmag
  64- 69  F6.3  mag     Rmag      ?=- Landolt R magnitude
  71- 75  F5.3  mag   e_Rmag      ?=- rms uncertainty on Rmag
  77- 82  F6.3  mag     Imag      ?=- Landolt I magnitude
  84- 88  F5.3  mag   e_Imag      ?=- rms uncertainty on Umag
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History:
    From electronic version of the journal

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(End)                                      Patricia Vannier [CDS]    23-Mar-2012