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VIII/9      Argentina High-Latitude H I Survey (Colomb 1980)
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The Argentina High-Latitude H I Survey
    Colomb F.R., Poppel W.G.L., Heiles C.
    <Astron. & Astrophys. Suppl., 40, 47 (1980)>
    =1980A&AS...40...47C
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ADC_Keywords: Radio sources ; Surveys ; H I data 

Description:
   This survey consists of H I 21-cm spectra covering the southern sky
   with absolute galactic latitude |b| >10 degrees and a declination
   <-25 degrees.  The observations were made with the 30 m telescope of
   the Instituto Argentino de Radioastronomia during 1973 to 1977 and
   were described in (Colomb et al. 1977).  The data were obtained by
   keeping the telescope fixed on the meridian at the desired declination
   and letting the sky drift through the field. The individual spectra
   were obtained with a 56-channel filterbank and covering the velocity
   range from about -40 to +40 km/sec.  The velocity resolution is
   2 km/sec, and the beamwidth is 30 arcmin.   Each spectrum or record
   consists of a header followed by 56 antenna temperatures.  The header
   contains the galactic longitude, galactic latitude, right ascension
   (1950), declination (1950), date (local standard time), date of
   observation (year, month, day), bad scan information, velocity
   (LSR) of channel 1, velocity (LSR) of channel 56, and a quality
   factor.  The catalog contains a total of 55470 spectra. 
  
File Summary:
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 FileName       Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe             80        .   This file
catalog           396    55470   Southern sky survey data
software           80      459   Two Fortran main codes and several subroutines
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Byte-by-byte Description of file: catalog
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   Bytes  Format   Units     Label    Explanations
--------------------------------------------------------------------------------
   1-  6   I6      0.001deg  GLONm    Galactic longitude in units of 0.001 degrees
   7- 12   I6      0.001deg  GLATm    Galactic latitude in units of 0.001 degrees
  13- 14   I2      h         RAh      Right ascension (1950)
  15- 16   I2      min       RAm      RA in minutes (1950)
  17- 18   I2      s         RAs      RA in seconds (1950)
      19   A1      ---       DE-      Sign of declination
  20- 21   I2      deg       DEd      [0,90] DEC in degree (1950)
  22- 23   I2      arcmin    DEm      DEC in arcminutes (1950)
  24- 25   I2      arcsec    DEs      DEC in arcseconds (1950)
  26- 27   I2      h         LSTh     Local Standard Time (LST) in hours
  28- 29   I2      min       LSTm     LST in minutes
  30- 31   I2      s         LSTs     LST in seconds
  32- 37   A6      ---       ObsDate  Date of observation in yymmdd (year month day)
  38- 39   I2      ---       Bscan1   Bad scan number 1
  40- 41   I2      ---       Bscan2   Bad scan number 2
  42- 43   I2      ---       Bscan3   Bad scan number 3
  44- 45   I2      ---       Bscan4   Bad scan number 4
  46- 47   I2      ---       Bscan5   Bad scan number 5
  48- 53   I6      0.01km/s  CenVel1  Central velocity at channel 1
  54- 59   I6      0.01km/s  CenVel56 Central velocity at channel 56
      60   I1      ---       Qfactor  Quality factor, 0 (set to zero)
  61-396 56I6      0.01K     AntTemp  Antenna temperature in units of 0.01K   
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Remarks1:
  In each record, the corresponding VLSRs for the measured antenna temperatures
  can be obtained by the following statements.
  V1 = CenVel1 * 0.01       in units of km/s
  V56= CenVel56* 0.01
  dv = (V56-V1)/55.
  Do i = 1, 56
     VLSR(i)= V1 + (i-1)* dv
  enddo

Brief description of software:
  The included software contains FORTRAN codes for use in extracting spectra 
  from the H I surveys of Heiles and Habing, Parkes, Argentina, Bell Labs, and
  Weaver and Williams.

Remarks2:
  The data consist of 56-channel profiles sorted in Galactic latitude and
  longitude. The data were obtained by holding the telescope fixed and
  letting the sky drift through. Thus the natural coordinate system for the
  data is in celestial coordinates, so the data are not gridded in Galactic
  coordinates.
  This survey has good velocity and angular resolution, so is good for 
  examining the structure of narrow features. There was no previous ADC 
  documentation for this catalog.

Acknowledgements:
  The General Information on High-latitude 21-cm Line Surveys by Carl Heiles
  (1988), University of California, Berkeley was used to create this ReadMe
  file.

References:
   Colomb, F.R., Poppel, W.G.L. and Heiles, C. 1977, ApJS, 29, 89
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(End)                        C.-H. Joseph Lyu [Hughes STX/NASA]  12-Dec-1995