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.
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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
2e.dat 114 5948 The catalogue
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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
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Bytes Format Units Label Explanations
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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)
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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.
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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