1 PSC
        PSC (Point Source Catalog)

    This is a general utility to look  through  the  compacted  IRAS   Point
    Source  Catalog.   This  program  is able to select sources according to
    various criteria and to create  binary  tables  and/or  formatted  files
    containing the information about the sources.  Even on tape, the program
    is fast to select sources (less than 8 minutes in any  small  positional
    box,  and  often  less).  The time needed to list the information may be
    longer if you select many sources..

    It requests as input a compacted  file  containing  the   full   catalog
    information  and  a table containing pointers to this compacted file, as
    well as positional and flux information.  The compacted catalog  can  be
    either  on  magnetic  tape  (GAG242  at  the  Groupe  d'Astrophysique in
    Grenoble), or on disk (with logical name PSC_COMPACT).  The input  table
    must  be on disk.  It can be either the default table IRAS_PSC_EQU (full
    catalog) or any previous output of the program (to  work  on  a  reduced
    source list).

    The task produces as output  a   formatted   file   and/or   an   output
    table.  A description of the formatted output can be obtained in GRAPHIC
    or OVERLAY by HELP PSC_IRAS FORMAT.  Reference to the  IRAS  explanatory
    supplement  will probably be needed except for IRAS wizards.  The output
    table has the same content as the input one  (but  of  course  only  for
    selected  sources)  and can therefore be used as input to another run of
    the program:  as an example, this will allow  to  select  first  on  the
    12/25  color  and  then  on  the  60/100  color.   Since this table is a
    standard GreG table, it can also be used in  GreG's  COLUMN  command  to
    produce  plots.   Column  1 is Right Ascension (in radians), column 2 is
    Declination (also in radians).  Columns 3 to 6 contain the 4 fluxes  (12
    to  100),  with upper limits coded as negative.  Column 7 is an internal
    pointer.  This can be used for example, to plot the distribution on  the
    sky of a given class of sources.  After some simple processing (in SIC),
    color/color plots can easily be produced.
2 IN_TABLE$
        TASK\FILE "Input table" IN_TABLE$

    The name of the input table.  Answer * if you want to search through the
    whole  catalog.   If  you want to search through a subset of the catalog
    (obtained from a previous run of the program), specify the name  of  the
    corresponding table.
2 F_OUT$
        TASK\LOGICAL "Create a formatted output" L_OUT$

    Answer YES if you want to  create  a  formatted  output,  NO  otherwise.
    Don't answer YES if you expect to select half of the catalog!
2 OUT_LIST$
        TASK\FILE "Formatted output file name" OUT_LIST$

    The name of the formatted output file.  This is only used if you  create
    one.
2 T_OUT$
        TASK\LOGICAL "Create an output table" T_OUT$

    Answer YES if you want to create an output table, otherwise  answer  NO.
    The  output table can be used as input for another run of the program if
    you want to work on a subset of the catalog.  It can  also  be  used  in
    GreG  to produce things like color/color plots.  See the main help for a
    description of its content.
2 OUT_TABLE$
        TASK\FILE "Output table name" OUT_TABLE$

    The name of the output table.  This is only used if you create one.
2 CHECK_BOX$
        TASK\LOGICAL "Select on coordinates" CHECK_BOX$

    Answer YES if you want to select on Right Ascension and Declination,  NO
    otherwise.  Selection on LII and BII may be implemented one day.  Ask T.
    Forveille if you need it.
2 BOX$
        TASK\REAL "Box limits (RAmin,RAmax,DECmin,DECmax)" BOX$[4]

    These are the limits of the search box:  RAmin, RAmax,  DECmin,  DECmax.
    At  present, these should be entered in radians.  This will hopefully be
    replaced by a more convenient format one day.  Remind T.  Forveille that
    this has to be done.
2 CHECK_QUAL$
        TASK\LOGICAL "Select on flux quality" CHECK_QUAL$

    Answer YES if you want to select on flux qualities, NO otherwise.
2 QUALITY$
        TASK\INTEGER "Desired flux qualities" QUALITY$[4]

    The minimal flux  quality  you  are  willing  to  accept  in  each  band
    (12, 25, 60, and 100 microns).  3 is good, 2 poor, 1 an upper limit.
2 CHECK_ID$
        TASK\LOGICAL "Select on identifications" CHECK_ID$

    Answer YES if  you  want  to  select  on  the  identification  type,  NO
    otherwise.
2 WANTED_ID$
        TASK\INTEGER "Enter identifications" WANTED_ID$

    Enter  the  accepted  identification  types.   Possible  values  of  the
    identification type are:
      -  1:  association with an extragalactic catalog.
      -  2:  association with a stellar catalog.
      -  3:  association with other   catalogs   (planetary   nebulae,   HII
        regions, reflection nebulae...).
      -  4:  association with several of the  previous  types  of   catalogs
        (stellar+ extragalactic for example).

2 CHECK_CATA$
        TASK\LOGICAL "Select on catalog number" CHECK_CATA$

    Answer YES if you want to select sources in one  particular  association
    catalog (IRC, or Zwicky, or de Vaucouleurs, or...), NO otherwise.
2 WANTED_CATA$
        TASK\INTEGER "Catalog number" WANTED_CATA$

    This is a code for the association catalog.  The meaning of the code  is
    the following:
       -  1 General Catalog of Variable Stars
       -  2 Dearborn (Faint Red Stars)
       -  3 AFGL (=CRL, =AFCRL) Revised
       -  4 IRC 2 Micron Sky Survey
       -  5 Wesselius Globules (unpublished)
       -  6 Second reference catalog, De Vaucouleurs (Bright Galaxies)
       -  7 Emission Lines Stars
       -  8 Equatorial Infrared Catalog
       -  9 UPPSALA Galaxy Catalog
       -  10 Morphological Catalog of Galaxies
       -  11 Planetary Nebula Strasbourg
       -  12 Zwicky (Galaxies and Clusters)
       -  13 SAO
       -  14 ESO/UPPSALA Galaxy Catalog
       -  15 Bright Stars (HR)
       -  16 Suspected Variable Stars
       -  17 Cool Carbon Stars
       -  18 Gliese (Nearby Stars)
       -  19 S Stars
       -  20 Parkes HII regions
       -  21 Bonn HII regions
       -  22 Blitz (CO velocity in HII regions)
       -  23 Lynds and others...  (Nebulosities)
       -  24 IRC with good positions
       -  25 Dwarf Galaxies
       -  26 Peculiar Galaxies (Arp)
       -  27 Markarian (Galaxies with UV)
       -  28 Strong 5 GHz (> 1 Jy, Kuhr)
       -  29 Veron-Veron (Quasars and Active Nuclei)
       -  30 Zwicky (Galaxies)
       -  31 Interacting Galaxies (Vorontsov and Velyaminov.)

2 CHECK_RATIO$
        TASK\LOGICAL "Select on flux ratios" CHECK_RATIO$

    Answer YES if you want  to  select  on  the  ratio  of  two  fluxes,  NO
    otherwise.
2 BAND$
        TASK\INTEGER "Bands for flux ratio" BANDS$[2]

    The names of the two band used in the ratio.  For example 25 and  60  if
    you want to select on the ration 25/60.
2 MIN_RATIO$
        TASK\REAL "Minimum flux ratio" MIN_RATIO$

    The minimum value of the ratio you are willing to accept.
2 MAX_RATIO$
        TASK\REAL "Maximum flux ratio" MAXRATIO$ !

    The maximum value of the ratio you are willing to accept.
2 CHECK_LUM$
        TASK\LOGICAL "Select on total flux" CHECK_LUM$

    Answer YES if you want  to  select  on  the  integrated  IRAS  flux,  NO
    otherwise.
2 MIN_LUM$
        TASK\REAL "Minimum total flux" MIN_LUM$

    The minimum integrated flux you are willing to  accept.   The  unit  for
    integrated flux is one solar luminosity at one kiloparsec.
2 CHECK_FLUX$
        TASK\LOGICAL "Select on one flux" CHECK_FLUX$

    Answer YES if you want to select on a  minimum  flux  in  one  band,  NO
    otherwise.
2 MIN_BAND$
        TASK\INTEGER "Band for minimum flux" MIN_BAND$

    The name of the band on which you want to select.
2 MIN_FLUX$
        TASK\REAL "Minimum flux in band" MIN_FLUX$

    The minimum flux in band MIN_BAND$ you are willing to accept.  The  unit
    is one Jansky.
2 CHECK_LRS$
        TASK\LOGICAL "Select on LRS spectral type" CHECK_LRS$

    Answer YES if you want to select  on  the  Low  Resolution  Spectrometer
    spectral type, NO otherwise.
2 LRS_TYPE$
        TASK\CHARACTER "LRS type and subtype" LRS_TYPE$

    The LRS spectral type you want to  select.   Refer  to  the  Explanatory
    Suplement  for  a  description of the spectral types.  Specify 5* if you
    want to select all sources with spectral type 5 (for example), and 51 if
    you want to select only the sources with spectral type 5 and subtype 1.
2 TAPE$
        TASK\CHARACTER "Input tape drive for full catalog" TAPE$

    The name of the tape drive on which you will  mount  the  full  catalog.
    This information will only be used if the catalog is not on disk and the
    selection criteria that you specified need the full catalog.  Otherwise,
    you must nonetheless answer something, but anything will do.
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