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IX/18             EINSTEIN extended source survey (EXSS)     (Oppenheimer+ 1997)

A survey of the EINSTEIN IPC Database for extended X-ray sources. Oppenheimer B.R., Helfand D.J., Gaidos E.J. <Astron. J. 113, 2134-2146 (1997)> =1997AJ....113.2134O (SIMBAD/NED BibCode)
ADC_Keywords: X-ray sources ; Clusters, galaxy ; Mission_Name: Einstein Description: This catalog contains sources from data collected by the IPC on board the EINSTEIN Observatory. This survey is designed to find extended sources and diffuse emission rather than point sources. In addition, the source detection algorithm is substantially improved over that used by EMSS. Sources were searched using circular apertures up to 6.1arcmin. The catalog contains 1326 extended source candidates at high galactic latitude (|b| > 20°). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog 328 1325 The EXSS Catalogue
See also: I/146 : Positions and Proper Motions (PPM-North) I/193 : Positions and Proper Motions (PPM-South) I/208 : Positions and Proper Motions (PPM-90000 Supplement) VII/4 : Abell and Zwicky Clusters of Galaxies IX/13 : 2E Catalogue (Harris+ 1994) IX/15 : Einstein extended medium-sensitivity survey (EMSS) telnet://einline@einline.harvard.edu/ : the EINLINE data-base Byte-by-byte Description of file: catalog
Bytes Format Units Label Explanations
1- 16 A16 --- Name !+ EXSS source name 19- 27 F9.7 rad RArad Right Ascension (B1950.0) 29- 38 F10.7 rad DErad Declination (B1950.0) 40- 45 F6.3 ct/s cts1 IPC photon counts per second for detection in aperture 1 (0.000 = no detection) 47- 52 F6.3 ct/s cts2 IPC photon counts per second for detection in aperture 2 (0.000 = no detection) 54- 59 F6.3 ct/s cts3 IPC photon counts per second for detection in aperture 3 (0.000 = no detection) 61- 66 F6.3 ct/s cts4 IPC photon counts per second for detection in aperture 4 (0.000 = no detection) 68- 73 F6.2 --- S/N1 ?=0.00 Signal to noise ratio for aperture 1 75- 80 F6.2 --- S/N2 ?=0.00 Signal to noise ratio for aperture 2 82- 87 F6.2 --- S/N3 ?=0.00 Signal to noise ratio for aperture 3 89- 94 F6.2 --- S/N4 ?=0.00 Signal to noise ratio for aperture 4 98-102 F5.2 arcsec dRA1 Offset in right ascension of the aperture 1 detection from the assumed object position (columns 1 and 2), found through the technique described in the paper 106-110 F5.2 arcsec dDE1 Offset in declination for aperture 1 114-118 F5.2 arcsec dRA2 Offset in right ascension for aperture 2 122-126 F5.2 arcsec dDE2 Offset in declination for aperture 2 130-134 F5.2 arcsec dRA3 Offset in right ascension for aperture 3 138-142 F5.2 arcsec dDE3 Offset in declination for aperture 3 146-150 F5.2 arcsec dRA4 Offset in right ascension for aperture 4 154-158 F5.2 arcsec dDE4 Offset in declination for aperture 4 161-166 I6 --- PPM ?=-99 Star number from the Positions and Proper Motions (PPM) Catalog (I/146, I/193 and I/208) for the star which is identified with the EXSS source. 168-173 F6.2 mag Vmag ?=-99.00 V band magnitude of the PPM star 176-181 F6.2 arcsec dRA11 ?=-99.00 Right ascension difference between PPM and EXSS positions 184-189 F6.2 arcsec dDE11 ?=-99.00 Declination difference between the PPM and EXSS positions 191-203 A13 --- EMSS EMSS source IX/15 identified with the EXSS source 205-208 A4 --- Typ11 Type of the EMSS source (from EMSS catalog) 211-215 F5.1 --- S/N11 ?=-99.0 Signal to noise ratio of the EMSS source with the EMSS detection algorithm 218-223 F6.2 arcsec dRA12 ?=-99.00 Right ascension difference between the EMSS and the EXSS positions 226-231 F6.2 arcsec dDE12 ?=-99.00 Declination difference between the EMSS and the EXSS positions 234-245 A12 --- ZwCl Zwicky cluster of galaxies identified with the EXSS source (see cat. VII/4) 249-253 F5.1 arcsec Size ?=-99.0 Approximate size of the Zwicky cluster (from the Zwicky catalog) 256-261 F6.2 arcsec dRA13 ?=-99.00 Right ascension difference between ZwCl and EXSS positions. 264-269 F6.2 arcsec dDE13 ?=-99.00 Declination difference between ZwCl and EXSS positions. 273-282 A10 --- Abell Abell cluster of galaxies identified with the EXSS source (see cat. VII/4) 286-291 F6.2 arcsec dRA14 ?=-99.00 Right ascension difference between Abell and EXSS positions 294-299 F6.2 arcsec dDE14 ?=-99.00 Declination difference between Abell and EXSS positions 301-304 A4 --- Typ14 The type of the corresponding source in the EINLINE database that is identified with the EXSS source 308-313 F6.2 arcsec dRA15 ?=-99.00 Right ascension difference between EINLINE and EXSS positions 316-321 F6.2 arcsec dDE15 ?=-99.00 Declination difference between EINLINE and EXSS positions 323-328 F6.2 arcsec d2 ?=140.01 The quadratic sum of dRA15 and dDE15
History: * 27-Aug-1997: From http://astro.caltech.edu/~bro/exss/exss.html * 09-Dec-2005: A few typos in this ReadMe corrected.
(End) Jean-Marie Hameury, Francois Ochsenbein [CDS] 27-Aug-1997
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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