Access to Astronomical Catalogues

B/cfht              Log of CFHT Exposures             (CADC, 1979-)
Log of CFHT (Canadian-France-Hawaii Telescope) Exposures
     National Research Council, Herzberg Institute of Astrophysics
    <Dominion Astrophysical Observatory, Victoria, BC, Canada (1979-)>
ADC_Keywords: Observatory log


Description:
    This database contains a log of the Canadian-France-Hawaii Telescope
    observations since 1979, managed the the Canadian Astronomical Data
    Center (CADC).

    The data are regularly updated (see the date of the last version at
    the end of this file).

Acknowledgement Requirement:
    If you have used CADC facilities for your research, you should refer
    to the data as obtained "from the CADC" and include the following
    acknowledgment in any publication:
      "Guest User, Canadian Astronomy Data Centre, which is operated by
      the Herzberg Institute of Astrophysics, National Research Council
      of Canada."
File Summary:

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
cfht.dat         656   631125   The CFHT Observation Log (November 2009)


See also:
     http://cadcwww.hia.nrc.ca/cfht/ : CFHT Archive home page


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

   Bytes Format Units   Label     Explanations

   1-  6  I6    ---     expnum    [1/] Exposure unique identifier
   8- 17  I10   mas     RAmas     ? Right Ascension (J2000) at the beginning
                                    of the exposure
  19- 28  I10   mas     DEmas     ? Declination (J2000) at the beginning of
                                    the exposure
  30- 39  I10   s       ObsDate   Observation date (based on universal time,
                                     in DMF format = seconds since 1980)
  41- 46  I6    s       ExpTime   ?=-1 Exposure time in seconds for the exposure
      48  A1    ---     class    *Class of observation, coming from cfht
      50  A1    ---     science  *[YCFHOT] Exposure Science classification
      52  A1    ---     preview  *[YCILPST] Existence of a preview
  54- 73  A20   ---     ObsType   Observation type (BIAS, FLAT, OBJECT, etc...)
  75-144  A70   ---     Object    Target name as typed by the observer
 146-165  A20   ---     Instrum   Name of the instrument
 167-186  A20   ---     Detector  Name of the detector in use for this exposure
 188-193  F6.3  ---     airmass   ? Value of the airmass at the beginning of
                                     the exposure
 195-214  A20   ---     Focus     Name of the telescope focus in use
 216-285  A70   ---     PIname    Name of the Principal Investigator as typed
                                     by the support astronomer
 287-356  A70   ---     Observer  Observer name as typed by the support
                                     astronomer
 358-367  I10   s       RelDate   Release date of the exposure in DMF format
                                     (seconds since 1980)
 369-373  I5    pix     naxis1    ? Dimension of the image (X)
 375-379  I5    pix     naxis2    ? Dimension of the image (Y)
 381-400  A20   ---     runID     Run Identification, made of
                                     YYYY + Semester (I-II) + Country (C-F-H)
                                     + running number
 402-656  A255  ---     Comment   Comments as typed in by the observer

Note on class: (uppercase letters represent Merged parameters)
     B merged BIAS
     C merged calibration
     D merged DARK
     F merged FLAT
     P observation
     X merged FOCUS ?
     a optical alignment
     b single bias
     c single calibration
     d single dark
     f single flat
     o single observation
     r "RCA2 CCD" or "RETICON" detector (Coude observations only)
     t Test observation
     v ?
     x focus frame
Note on science:
     C = Not an object exposure.
     F = Fake detector in use.
     H = Header is not valid.
     O = The tcs is turned off.
     T = Start time is out of range.
     Y = Is a science dataset.
Note on preview: previews (FITS H-compressed) are available
     C - Calibration file error
     I - Instrument not supported
     L - Instrument parameter out of range
     P - Dataset not public
     S - Dataset is not science
     T - Dataset in the todo list
     Y - Dataset has been previewed

(End)                Daniel Durand [NRC], Francois Ochsenbein [CDS]  15-Nov-2009