J/A+AS/119/547      IR photometry of ESO calibration stars (van der Bliek+ 1996)
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Infrared aperture photometry at ESO (1983-1994) and its future use.
       Van der Bliek N.S., Manfroid J., Bouchet P.
      <Astron. Astrophys. Suppl. Ser. 119, 547 (1996)>
      =1996A&AS..119..547V      (SIMBAD/NED BibCode)
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ADC_Keywords: Infrared sources ; Photometry, infrared

Keywords: instrumentation: photometers - techniques: photometric -
          infrared: stars

Description:
    We describe the infrared (IR) photometric system for the single
    channel photometers at ESO, which have been used from 1983 until 1994.
    In addition to the broadband near infrared (NIR, 1-5µm) photometric
    system presented in 1991 by Bouchet et al. and Bersanelli et al., we
    describe a narrow-band NIR photometric system and a mid infrared (MIR,
    7-20µm) photometric system. We also extend the set of NIR standard
    stars by Bouchet et al. towards fainter objects (K=~9). The
    photometric data of the standard stars in these systems were extracted
    from the complete IR photometric data archive of ESO, covering 10
    years. The zeropoints of the NIR photometry are set by assuming that
    HR 3314 has a V-magnitude of 3.89, and that V-K=-0.05, J-K=-0.01,
    H-K=-0.01, K-L'=0.00, K-M=0.00. The zeropoints of the MIR photometry
    are set by assuming that the colours of{beta} Hyi (HR 0098) and
    {alpha} CenA (HR 5459) are equal to the colours of the Sun. We adopt
    the absolute calibration of Megessier (1995A&A...296..771M) for the
    NIR and we argue that this calibration can be extrapolated to 20µm,
    using the MIR calibrations by Rieke et al. (1985AJ.....90..900R) and
    Cohen et al. (1992AJ....104.1650C). The definition of the zeropoints
    is consistent with the absolute calibration. We obtained accurate
    ({sigma}=~0.02mag.) NIR photometry of about 240 standard stars and MIR
    photometry of about 40 standard stars ({sigma}=~0.04mag). Comparison
    of our NIR photometric system with other well established systems
    shows that there are some small colour dependencies and zeropoint
    offsets which are always smaller than about 0.02mag. except for the L'
    band.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table5           122      253   NIR (JHKL'M) broad band photometry of ESO
                               calibration stars
table6           122      113   MIR broad band photometry of ESO calibration stars
table7           121       43   MIR photometry of ESO calibration stars


Byte-by-byte Description of file:  table5

   Bytes Format Units   Label     Explanations

   1-  9  A9    ---     Name      Star designation
  11- 12  I2    h       RAh       Right Ascension 2000 (hours)
  14- 15  I2    min     RAm       Right Ascension 2000 (minutes)
  17- 18  I2    s       RAs       Right Ascension 2000 (seconds)
      20  A1    ---     DE-       Declination 2000 (sign)
  21- 22  I2    deg     DEd       Declination 2000 (degrees)
  24- 25  I2    arcmin  DEm       Declination 2000 (minutes)
  27- 28  I2    arcsec  DEs       ? Declination 2000 (seconds)
  30- 37  A8    ---     Sp        Spectral Type & Luminosity Class
  39- 44  F6.3  mag     Jmag      J magnitude (1.24 microns)
  46- 50  F5.3  mag     e_Jmag    Standard deviation of Jmag
  52- 54  I3    ---     o_Jmag    Number of observations in Jmag
  56- 61  F6.3  mag     Hmag      H magnitude (1.63 microns)
  63- 67  F5.3  mag     e_Hmag    Standard deviation of Hmag
  69- 71  I3    ---     o_Hmag    Number of observations in Hmag
  73- 78  F6.3  mag     Kmag      K magnitude (2.19 microns)
  80- 84  F5.3  mag     e_Kmag    Standard deviation of Kmag
  86- 88  I3    ---     o_Kmag    Number of observations in Kmag
  90- 95  F6.3  mag     L'mag     ? L' magnitude (3.79 microns)
  97-101  F5.3  mag     e_L'mag   ? Standard deviation of L'mag
 103-105  I3    ---     o_L'mag   ? Number of observations in L'mag
 107-112  F6.3  mag     Mmag      ? M magnitude (4.64 microns)
 114-118  F5.3  mag     e_Mmag    ? Standard deviation of Mmag
 120-122  I3    ---     o_Mmag    ? Number of observations in Mmag


Byte-by-byte Description of file:  table6

   Bytes Format Units   Label     Explanations

   1-  9  A9    ---     Name      Star designation
  11- 12  I2    h       RAh       Right Ascension 2000 (hours)
  14- 15  I2    min     RAm       Right Ascension 2000 (minutes)
  17- 18  I2    s       RAs       Right Ascension 2000 (seconds)
      20  A1    ---     DE-       Declination 2000 (sign)
  21- 22  I2    deg     DEd       Declination 2000 (degrees)
  24- 25  I2    arcmin  DEm       Declination 2000 (minutes)
  27- 28  I2    arcsec  DEs       ? Declination 2000 (seconds)
  30- 37  A8    ---     Sp        Spectral Type & Luminosity Class
  39- 44  F6.3  mag     H0        H_0 magnitude (1.58 microns)
  46- 50  F5.3  mag     e_H0      Standard deviation of H_0
  52- 54  I3    ---     o_H0      Number of observations in H_0
  56- 61  F6.3  mag     BrGamma   Br_gamma magnitude (2.16 microns)
  63- 67  F5.3  mag    e_BrGamma  Standard deviation of Br_gamma
  69- 71  I3    ---    o_BrGamma  Number of observations in Br_gamma
  73- 78  F6.3  mag     K0        K_0 magnitude (2.22 microns)
  80- 84  F5.3  mag     e_K0      Standard deviation of K_0
  86- 88  I3    ---     o_K0      Number of observations in K_0
  90- 95  F6.3  mag     CO        ? CO magnitude (2.29 microns)
  97-101  F5.3  mag     e_CO      ? Standard deviation of CO
 103-105  I3    ---     o_CO      ? Number of observations in CO
 107-112  F6.3  mag     L0        ? L_0 magnitude (3.70 microns)
 114-118  F5.3  mag     e_L0      ? Standard deviation of L_0
 120-122  I3    ---     o_L0      ? Number of observations in L_0


Byte-by-byte Description of file:  table7

   Bytes Format Units   Label     Explanations

   1-  8  A8    ---     Name      Star designation
  10- 11  I2    h       RAh       Right Ascension 2000 (hours)
  13- 14  I2    min     RAm       Right Ascension 2000 (minutes)
  16- 17  I2    s       RAs       Right Ascension 2000 (seconds)
      19  A1    ---     DE-       Declination 2000 (sign)
  20- 21  I2    deg     DEd       Declination 2000 (degrees)
  23- 24  I2    arcmin  DEm       Declination 2000 (minutes)
  26- 27  I2    arcsec  DEs       Declination 2000 (seconds)
  29- 36  A8    ---     Sp        Spectral Type & Luminosity Class
  38- 43  F6.3  mag     Nmag      ? N magnitude (10.36 microns)
  45- 49  F5.3  mag     e_Nmag    ? Standard deviation of Nmag
  51- 53  I3    ---     o_Nmag    ? Number of observations in Nmag
  55- 60  F6.3  mag     N1        N1 magnitude (8.38 microns)
  62- 66  F5.3  mag     e_N1      Standard deviation of N1
  68- 70  I3    ---     o_N1      Number of observations in N1
  72- 77  F6.3  mag     N2        N2 magnitude (9.69 microns)
  79- 83  F5.3  mag     e_N2      Standard deviation of N2
  85- 87  I3    ---     o_N2      Number of observations in N2
  89- 94  F6.3  mag     N3        N3 magnitude (12.89 microns)
  96-100  F5.3  mag     e_N3      Standard deviation of N3
 102-104  I3    ---     o_N3      Number of observations in N3
 106-111  F6.3  mag     Q0        ? Q0 magnitude (18.06 microns)
 113-117  F5.3  mag     e_Q0      ? Standard deviation of Q0
 119-121  I3    ---     o_Q0      ? Number of observations in Q0


Acknowledgements: Nicole van der Bliek 

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(End)                                         Patricia Bauer [CDS]   02-Apr-1996