Detailed Description of VII/185 : IRAS 1.2 Jy IRAS Redshift Survey (Strauss+ 1990-1995)

VII/185    IRAS 1.2 Jy IRAS Redshift Survey            (Strauss+ 1990-1995)
================================================================================
IRAS 1.2 Jy Redshift Survey Data File
   Strauss M., Davis M., Yahil A., Huchra J.P.
  <Astrophys. J. 361, 49 (1990)>
  =1990ApJ...361...49S
   Strauss M., Huchra J.P., Davis M., Yahil A., Fisher K.B., Tonry J.
  <Astrophys. J. Suppl. 83, 29 (1992)>
  =1992ApJS...83...29S
   Fisher K.B., Huchra J.P., Strauss M.A., Davis M., Yahil A., Schlegel D.
  <Astrophys. J. Suppl. 100, 69 (1995)>
  =1995ApJS..100...69F
  =1995yCat.7185....0S
================================================================================
ADC_Keywords: Infrared sources ; Photometry, infrared ; Redshifts


Description:
    This is an explanation of the redshift survey of Fisher, Huchra,
    Strauss, Davis, Yahil and Schlegel; the data set is described in full
    in ApJ 361, 49 (1990). The data for the brighter half are included in
    ApJ Supp 1992, 83, 29; the data for the fainter half are included in a
    paper submitted for publication to the Astrophysical Journal
    Supplement. The survey contains 9897 objects selected from the IRAS
    database according to the criteria listed in that paper, briefly:
                F60    > 1.2 Jy;
                F602 > F12 f25;
                |b|    > 5;
                high source density flag at 60 microns not raised.
    Thus, the file consists of both galaxies and Galaxian contaminants;
    this is explained below. The sample contains ~5320 galaxies, and 14
    objects without id's at the present time.

File Summary:

       FileName      Lrecl  Records   Explanations

×                   80        .   This file
× ReadMe            80        .   This file
× catalog.dat      132     9897   The data file
× exclude.lis        6     1465   Numbers of the lune bins that are excluded
× exclude.f         80      281   Fortran program to define excluded regions


See also:
    II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
    II/174 : IRAS 2Jy Redshift Survey Data File (Strauss+ 1992)


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

   Bytes Format  Units   Label   Explanations

   1-  2  I2     h       RAh     Right Ascension B1950 (hours) (1)
   3-  4  I2     min     RAm     Right Ascension B1950 (minutes) (1)
   5-  8  F4.1   s       RAs     Right Ascension B1950 (seconds) (1)
       9  A1     ---     DE-     Declination B1950 (sign) (1)
  10- 11  I2     deg     DEd     Declination B1950 (degrees) (1)
  12- 13  I2     arcmin  DEm     Declination B1950 (minutes) (1)
  14- 15  I2     arcsec  DEs     Declination B1950 (seconds) (1)
  17- 20  I4   10-3[dJy] nf12    ? 12µm flux (2)
  21- 24  I4   10-3[dJy] nf25    ? 25µm flux (2)
  25- 28  I4   10-3[dJy] nf60    ? 60µm flux (2)
  29- 32  I4   10-3[dJy] nf100   ? 100µm flux (2)
      34  I1     ---     id      [0/4] IRAS-PSC association type (9)
      35  I1     ---     x       [0/8] IRAS-PSC extended object flag (3)
      36  A1     ---     CC      [A-L] IRAS-PSC correlation (4)
      37  A1     ---     v       [0-9Vnv] IRAS-PSC variability flag (5)
      38  A1     ---     s       Type of source (statusflag) (6)
      39  I1     ---     q_nf12  [1/3]? IRAS flux quality flag 12um (7)
      40  I1     ---     q_nf25  [1/3]? IRAS flux quality flag 25um (7)
      41  I1     ---     q_nf60  [1/3]? IRAS flux quality flag 60um (7)
      42  I1     ---    q_nf100  [1/3]? IRAS flux quality flag 100um (7)
  43- 53  A11    ---     optID   Optical counterpart name to the object (8)
      54  A1     ---    n_optID  [M] Unexplained note on optID
  55- 59  F5.2   mag     mag     ? Optical magnitude, where available
  61- 65  I5     km/s    Hvel    ? Heliocentric velocity, from literature
                                   (see (VII/193)) or measured by us
  66- 68  I3     km/s    e_Hvel  ? Heliocentric velocity error
  69- 72  A4     ---     r_Hvel  Code for source of redshift in ZCAT (VII/193)
  73- 77  A5     ---     Ttype   de Vaucouleurs' T-type from ZCAT (VII/193)
  79- 84  A6     ---    UGC/ESO  Object ID from UGC or ESO catalog
  90- 95  A6     ---     Sp      Internal flag coding the optical spectrum
                                 in the CfA database
  97-116  A20    ---     Comm    Miscellaneous comments from ZCAT (VII/193)
 117-120  I4   10-3[dJy] pf12    ? IRAS-PSC 12µm flux (2)
 121-124  I4   10-3[dJy] pf25    ? IRAS-PSC 25µm flux (2)
 125-128  I4   10-3[dJy] pf60    ? IRAS-PSC 60µm flux (2)
 129-132  I4   10-3[dJy] pf100   ? IRAS-PSC 100µm flux (2)

Note (1): The coordinates for all objects that appear in the IRAS PSC,
     Version 2 (II/125), are from that source, and are given as B1950.0;
     there are also a few very large galaxies whose fluxes and coordinates
     are taken from the Large Optical Galaxy Catalog (Rice et al. 1988,
     Cat. VII/109)
Note (2): The IRAS fluxes are coded in a compact logarithmic form:
  nFx=1000*log(10Fx), or Fx=10(nFx/1000-1) for x=12, 25, 60, 100.
  The fluxes are taken from the PSC, unless:
  *  The object is extended at 60 microns (see the Note (3) below)
  *  The object is variable (see the Note (5) below)
  *  The object is of moderate flux quality at 60 microns (see q_nf60)
  In these cases, we have obtained one-dimensional addscan's of the data and
  used the zero-crossing flux from the median scan's in all four bands, as
  supplied by SCANPI. Those sources flagged as extended in Rice et al.
  (VII/109) have fluxes from that source.
Note (3): The extendflag indicates whether or not an object is flagged as
  extended (SES(2) flag) in the IRAS-PSC. Values are:
     0 = Not extended
     1 = Extended at 12 microns
     2 = Extended at 25 microns
     3 = Extended at 12 and 25 microns
     4 = Extended at 60 microns
     5 = Extended at 12 and 60 microns
     6 = Extended at 25 and 60 microns
     7 = Extended at 12, 25, and 60 microns
     8 = Extended in Rice et al (VII/109)
Note (4): The correlation coefficient is taken from the PSC and represents
     the best correlation coefficient between a hours-confirmed scan and
     the point source template at 60µm in the Point Source Data Base;
     see the Explanatory Supplement for details.  A means 99% or better
     correlation, B is between 98 and 99% and so on.
Note (5): The varflag is a measure of variability in 12 and 25 microns:
   n = No measure of variability available.
   0 = No variability measured.
   N = Variability between 1 and 10%.
   1 = Variability between 10 and 20%
   2 = Variability between 20 and 30%
   3 = Variability between 30 and 40%
   4 = Variability between 40 and 50%
   5 = Variability between 50 and 60%
   6 = Variability between 60 and 70%
   7 = Variability between 70 and 80%
   8 = Variability between 80 and 90%
   9 = Variability between 90 and 100%
Note (6): The statusflag indicates the identification of the source, and,
    if it is a galaxy, the source of the redshift:
  * Galaxies: O,H,Z,F,B,D. The distinction between these is uninteresting,
    although Z indicates a source drawn from John Huchra's private version
    of ZCAT.
  * L indicates a Local Group galaxy.
  * Non-galaxies:
    M = HII region in external galaxy.
    S = Star
    s = Emission line star
    C = Cirrus or dark cloud
    P = Planetary nebula
    R = Reflection Nebula
    ? or E = Unidentified field.

  These labels are by no means complete; we observed only a fraction of these
  sources at the telescope.  See Strauss et al. 1990 (Cat. VII/185) and
  Yahil et al. (1991ApJ...372..380Y) for a discussion of our estimate of the
  number of sources flagged as cirrus that are indeed galaxies.
Note (7): The flux qualities are taken from the PSC; one number between
  one and three is given for each band:
       1 = Not detected
       2 = Moderate flux quality
       3 = Good flux quality
  If the flux given is from the PSC (as opposed to ADDSCAN), the flux listed
  in a band with flux quality 1 will be an upper limit.
Note (8): Optical identification is from a matching of the combined UGC,
   Zwicky, and NGC catalogs.
Note (9): The idtype is taken directly from the PSC; it ranges from 1 to 4:
    1 = association found in an extragalactic catalogs
    2 = association found in stellar catalogs
    3 = association found in other catalogs
    4 = association found in multiple types of catalogs


Remark:
  There is a supplementary file, exclude.lis which contains the number of
  the lune bins that are excluded (see Paper 1 for a full description).
  There is a series of Fortran programs in exclude.f that should be used
  to decide if a given object is in the excluded regions or not.  First,
  run the program write_lmask, which reads the exclude.lis file and creates
  a binary file lmask.lis, which has much faster I/O.  This only need be
  done once. Your code will need to call init_lmask to read in lmask.lis,
  and thereafter zones or not.
--------------------------------------------------------------------------------

  People may contact Michael Strauss at strauss@astro.princeton.edu
  if they have questions about these files.

History:
  * 1995-02-06: Files prepared by Michael Strauss
  * 1997-10-10: MCG and PK numbers which were truncated in the original
    catalogue file have been replaced at CDS (Francois Ochsenbein)
  * 2015-12-11: cosmetic changes at CDS
================================================================================
(End)  Michael Strauss [IAS]                                          1995-02-06