ACDS V10.0 - Sat Apr 27 06:40:54 CEST 2019
|  | Detailed Description of IX/13 :
 The 2E Catalogue (Harris+ 1994)
 |  | 
Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
IX/13               The 2E Catalogue      (Harris+ 1994)
================================================================================
EINSTEIN Observatory catalog of IPC X-ray sources
    Harris D.E., Forman W, Gioa 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
×                   80        .   This file
× ReadMe            80        .   This file
× 2e.dat           114     5948   The catalogue
See also:
    The IPC Slew Survey (1ES) catalog
    ftp://einline.harvard.edu : the Einstein On-Line System FTP service
    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