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J/MNRAS/342/738     HI Jodrell All Sky Survey                (Lang+, 2003)
First results from the HI Jodrell All Sky Survey:
inclination-dependent selection effects in a 21-cm blind survey.
    Lang R.H., Boyce P.J., Kilborn V.A., Minchin R.F., Disney M.J., Jordan C.A.,
    Grossi M., Garcia D.A., Freeman K.C., Phillipps S., Wright A.E.
   <Mon. Not. R. Astron. Soc. 342, 738 (2003)>
   =2003MNRAS.342..738L
ADC_Keywords: Surveys ; H I data ; Radial velocities

Keywords: surveys - galaxies: distances and redshifts - galaxies: evolution -
          galaxies: luminosity function, mass function -
          large-scale structure of Universe

Abstract:
    Details are presented of the H I Jodrell All Sky Survey (HIJASS).
    HIJASS is a blind neutral hydrogen (H I) survey of the northern sky
    (δ>22°), being conducted using the multibeam receiver on the
    Lovell Telescope (full width at half-maximum beamwidth 12-arcmin) at
    Jodrell Bank. HIJASS covers the velocity range -3500 to 10000 km/s,
    with a velocity resolution of 18.1km/s and spatial positional accuracy
    of ∼2.5arcmin. Thus far about 1115 deg2 of sky have been surveyed.
    The average rms noise during the early part of the survey was around
    16mJy/beam Following the first phase of the Lovell Telescope upgrade
    (in 2001), the rms noise is now around 13mJy/beam. We describe the
    methods of detecting galaxies within the HIJASS data and of measuring
    their H I parameters. The properties of the resulting H I-selected
    sample of galaxies are described. Of the 222 sources so far confirmed,
    170 (77 per cent) are clearly associated with a previously catalogued
    galaxy. A further 23 sources (10 per cent) lie close (within 6 arcmin)
    to a previously catalogued galaxy for which no previous redshift
    exists. A further 29 sources (13 per cent) do not appear to be
    associated with any previously catalogued galaxy.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat       103      222   The sample of confirmed HIJASS sources


Byte-by-byte Description of file: table2.dat

   Bytes Format Units     Label    Explanations

   1-  8  A8    ---       HIJASS   HIJASS source name (JHHMM+DD)
  10- 11  I2    h         RAh      Right ascension (J2000)
  13- 14  I2    min       RAm      Right ascension (J2000)
  16- 19  F4.1  s         RAs      Right ascension (J2000)
      21  A1    ---       DE-      Declination sign (J2000)
  22- 23  I2    deg       DEd      Declination (J2000)
  25- 26  I2    arcmin    DEm      Declination (J2000)
  28- 29  I2    arcsec    DEs      Declination (J2000)
  31- 36  F6.2  Jy.km/s   Sint     Integrated flux density of H I line
  38- 41  F4.2  Jy.km/s   e_Sint   rms uncertainty on Sint
  43- 47  I5    mJy       Speak    21cm peak flux density
  49- 52  F4.1  mJy       rms      rms noise
  54- 57  I4    km/s      BRV      Barycentric velocity
  59- 61  I3    km/s      DV20     Velocity width at 20% of the peak flux
  63- 65  I3    km/s      DV50     Velocity width at 50% of the peak flux
  67- 70  A4    ---       Class    Classificiation (1)
  72- 95  A24   ---       OName    Optical counterpart
  96- 99  F4.1  arcmin    Offset   ? Position offset of the optical counterpart
                                     from the H I position
 101-103  I3    km/s      OffVel   ? Velocity offset of the barycentric
                                     velocity contained within NED from the
                                     barycentric velocity as measured by HIJASS

Note (1): Classification use the following symbols:
     ASS: object within NED which is spatially coincident with the HIJASS
          source (i.e. within 6 arcmin) but for which no redshift is
          listed in NED
    ASS*: If there is more than one galaxy within 6 arcmin in NED
      ID: object in NED which matches the HIJASS source in both position
          and space (defined as being within 6 arcmin and 100km/s)
     ID*: ID which have been detected in H I for the first time by HIJASS
     PUG: previously uncatalogued galaxy


History:
    From electronic version of the journal
(End)                       James Marcout, Patricia Vannier [CDS]    11-Sep-2003