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IX/13               The 2E Catalogue      (Harris+ 1994)
================================================================================
EINSTEIN Observatory catalog of IPC X-ray sources
    Harris D.E., Forman W, Gioia I.M., Hale J.A., Harnden Jr. F.R., Jones C.,
    Karakashian T., Maccacaro T., McSweeney J.D., Primnini F.A., Schwarz J.,
    Tananbaum H.D., Thurman J.
   <SAO HEAD CD-ROM Series I (Einstein), Nos 18-36 (1994)>
================================================================================
ADC_Keywords: X-ray sources
Mission_Name: Einstein

Description:
    This catalog contains sources from EINSTEIN IPC (Imaging Proportional
    counter aboard the EINSTEIN (HEAO 2) satellite, in orbit between
    November 1978 and April 1981) detected during pointed observations.

    Note that a single source may have more than one entry in the catalog.

File Summary:
--------------------------------------------------------------------------------
 FileName       Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe             80        .   This file
2e.dat            114     5948   The catalogue
--------------------------------------------------------------------------------

See also:
    ftp://einline.harvard.edu : the Einstein On-Line System FTP service for
            the IPC Slew Survey (1ES) catalog
    http://hea-www.harvard.edu/einstein/Ein_home/ein_welcome.html :
            the Einstein Home Page at Harvard.


Byte-by-byte Description of file: 2e.dat
--------------------------------------------------------------------------------
   Bytes Format  Units   Label      Explanations
--------------------------------------------------------------------------------
   1-  4  I4     ---     CATNUM     [1/4809]+= Catalogue number of the source (1)
   5- 10  I6     ---     SEQNUM     Sequence number for the observation
  11- 13  I3     ---     FLDNUM     Field number of the source
  14- 16  I3     h       RAh        Right ascension 1950 (hours)
  17- 19  I3     min     RAm        Right ascension 1950 (minutes)
  20- 24  F5.1   s       RAs        Right ascension 1950 (seconds)
      26  A1     ---     DE-        Declination 1950 (sign)
  27- 28  I2     deg     DEd        Declination 1950 (degrees)
  29- 31  I3     arcmin  DEm        Declination 1950 (minutes)
  32- 34  I3     arcsec  DEs        Declination 1950 (seconds)
  35- 38  I4     arcsec  PosErr     Positional error (arcsec)
  39- 48  F10.5  ct/s    Crate      Corrected count rate
  49- 56  F8.5   ct/s    e_Crate    Error on the count rate
  57- 64  F8.1   s       LivTime    Live time (in seconds, at the field center)
  65- 73  F9.1   ---     NetCount   Net counts in the detect cell
  74- 81  F8.1   ---     BkgCount   Background counts in the detect cell
  82- 87  F6.1   ---     S/N        Signal to noise ratio for the detection
  88- 94  F7.1   ---     SizCor     Size correction factor (2)
  95- 99  I5     ---     RECode     Ribs and edges code (3)
 100-104  F5.1   arcmin  OffAxis    Dist. between source & field center (arcmin)
 105-110  A6     ---     SrcFlag    [AaHLEI ] Source flags (4)
 111-114  A4     ---     RefFlag    Reference and identification flag (5)
--------------------------------------------------------------------------------
Note (1): The name can either be of the form 2E CATNUM, or be based on 1950
     positions (format 2E HHMM.M+DDMM)
Note (2): The size correction is a factor which serves to correct all
     intensity measurements (optimized for point sources) of resolved
     sources for the x-ray flux ignored by the detection box measurements.
     SizCor is defined as the ratio of the intensity contained within the 3
     sigma contour to the intensity within the detection box (2.4'x2.4'),
     the latter value corrected for the point response function and mirror
     scattering.
Note (3): RECode is a numeric flag with non-zero values indicating that the
     detection cell falls near or on a rib shadow or detector edge. The
     code contains two embedded numbers expressed in 4 digits: the first
     two (thousands and hundreds) give the total number (max # = 16) of
     frame subcells shadowed by the ribs or masked field edge; the last
     two (tens and units digits) give the total number of subcells
     (maximum = 09) within the detect box which are shadowed.
Note (4): The flags are:
     A - additional detections of this source were achieved in other
         observations
     a - Probably should be paired with another detection; but separation
         exceeded cutoff and thus not assigned an "A" flag.
     H - a hardness ratio is available
     L - the source was detected only with the local detect method
     E - intensity corrected for source near the exposure cutoff at
         the field edge.
     I - source detected by local detect near a field edge.  Intensity
         adjusted to remove redundant exposure corrections.
Note (5): The reference indicator serves to alert the user to
     the following bibliographic information:
     AGN     Active Galactic Nucleus
     BL      BL Lac object
     CLG     Cluster (or group) of galaxies
     CV      Cataclysmic Variable
     G       Galaxy
     GLB     Globular Cluster
     P       Pulsar
     Q       Quasar
     RS      Radio source
     S       Star
     SNR     Supernova Remnant
     SY      Seyfert Galaxy
     *       Reference available, but no optical class
     +       Generic indicator which means possible ID lies from
             100-150 arcseconds from source location.
--------------------------------------------------------------------------------

History:
    The catalogue was prepared from the Einline version by
    Jean-Marie Hameury (Strasbourg Observatory) in October 1996.
================================================================================
(End)                              Jean-Marie Hameury  [Strasbourg]  1996-Oct-25