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J/AJ/121/2673    3{mu}m survey of the Chamaeleon I dark cloud    (Kenyon+, 2001)
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A 3{mu}m survey of the Chamaeleon I dark cloud.
     Kenyon S.J., Gomez M.
    <Astron. J. 121, 2673 (2001)>
    =2001AJ....121.2673K
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ADC_Keywords: Molecular clouds ; Stars, pre-main sequence ; Photometry, infrared
Keywords: infrared radiation - ISM: individual (Chamaeleon I) -
          stars: formation - stars: pre-main-sequence

Abstract:
    We describe an L-band photometric survey of ~0.5deg^2^ of the
    Chamaeleon I dark cloud. The survey has a completeness limit of
    L<11.0. Our survey detects 124 sources, including all known
    pre-main-sequence stars with L<=11. The fraction of sources with
    near-IR excess emission is 58%+/-4% for K=9-11. Cha I sources have
    bluer H-K and K-L colors than pre-main-sequence stars in
    Taurus-Auriga. These sources also have a strong correlation between
    EW(H{alpha} and K-L. Stars with K-L<=0.6 have weak H{alpha} emission;
    stars with K-L>=0.6 have strong H{alpha]mission. Because many Cha I
    sources are heavily reddened, this division between weak emission T
    Tauri stars and classical T Tauri stars occurs at a redder K-L than in
    Taurus-Auriga.

    We acquired L-band photometry of Cha I sources and standard stars
    using the South Pole Infrared Explorer (SPIREX) during the 1999
    March-October observing season. The SPIREX 60cm telescope developed
    by CARA for observations at the South Pole was equipped with the
    NOAO/KPNO Abu infrared camera, which includes a first generation
    1024x1024 InSb detector array.

File Summary:
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 FileName    Lrecl  Records   Explanations
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ReadMe          80        .   This file
table1.dat     103      124   L-band observations for the Cha I sources
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Byte-by-byte Description of file: table1.dat
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   Bytes Format Units   Label     Explanations
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   1-  3  I3    ---     [KG2001]  Cha I source number
   5-  6  I2    h       RAh       Right Ascension (J2000)
   8-  9  I2    min     RAm       Right Ascension (J2000)
  11- 14  F4.1  s       RAs       Right Ascension (J2000)
      16  A1    ---     DE-       Sign of the Declination (J2000)
  17- 18  I2    deg     DEd       Declination (J2000)
  20- 21  I2    arcmin  DEm       Declination (J2000)
  23- 24  I2    arcsec  DEs       Declination (J2000)
  26- 30  F5.2  mag     Lmag      ? The L-band magnitude
      32  A1    ---   f_Lmag      [s] Indicates a saturated detection on the
                                   SPIREX/Abu image
  34- 38  F5.2  mag     K-L       ? The K-L color
  40- 44  F5.2  mag     H-K       ? The H-K color
  46- 49  F4.2  mag     J-H       ? The J-H color
  51- 88  A38   ---     Id        Source identification
  90-102  A13   ---   r_Id        Reference numbers, separated by comma (1)
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Note (1): References:
    1 = Hartigan, 1993AJ....105.1511H,            "Hn NN"
    2 = Persi et al., 2000, Cat. <J/A+A/357/219>, "ISO-ChaI NNN"
    3 = Feigelson et al., 1993ApJ...416..623F,    "CHXR NN"
    4 = Cambresy et al., 1998A&A...338..977C,     "[CCE98] NN"
    5 = Schwartz, 1977ApJS...35..161S,            "NAME Cha N"
    6 = Baud et al., 1984ApJ...278L..53B,         "BYB NN"
    7 = Henize & Mendoza, 1973ApJ...180..115H,    "Ass CHA T 1-NN"
    8 = Comeron et al., 1999A&A...343..477C,      "CRBR MMSS.s-MMSS"
    9 = Feigelson & Kriss, 1989ApJ...338..262F,   "CHX NN, CHX NNa"
   10 = Glass, 1979MNRAS.187..305G,               "Glass A"
   11 = Schwartz & Henize, 1983AJ.....88.1665S
   12 = Oasa et al., 1999ApJ...526..336O,         "[OTS99] NN"
   13 = Hyland et al., 1982MNRAS.201.1095H,       "HJM AFF-NN"
   14 = Persi et al., 1999AJ....117..439P,        "[PMK99] ISOCAM Cha INaN"
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History:
    From electronic version of the journal
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(End)                    Greg Schwarz [AAS], Patricia Bauer [CDS]    28-Sep-2001