IX/22               Einstein extended deep survey         (Primini+, 1991)
The following files can be converted to FITS (extension .fit .fgz or .fiZ)
	targets.dat hfield.dat hfluxes.dat hsrc.dat hris_sep.dat ifield.dat
	isrc.dat ispec.dat icomp.dat ipchri.dat ihsample.dat sample.dat
Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=IX/22

drwxr-xr-x 58 cats archive 4096 Jan 25 2021 [Up] drwxr-xr-x 2 cats archive 4096 May 26 16:19 [TAR file] -rw-r--r-- 1 cats archive 590 Mar 5 2013 .message -rw-r--r-- 1 cats archive 44567 Jul 2 2001 ReadMe -rw-r--r-- 1 cats archive 1053 Mar 5 2013 +footg5.gif -rw-r--r-- 1 cats archive 3189 Mar 5 2013 +footg8.gif -r--r--r-- 1 cats archive 1745 Mar 11 1999 hfield.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 13912 Apr 20 1999 hfluxes.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 7265 Apr 15 1999 hris_sep.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 12538 Mar 12 1999 hsrc.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 16481 Mar 12 1999 icomp.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 604 Mar 12 1999 ifield.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 232 Apr 15 1999 ihsample.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 65320 Mar 12 1999 ipchri.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 18080 Apr 20 1999 ispec.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 17043 Mar 12 1999 isrc.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 312 Mar 11 1999 optinfo.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 1707 Apr 15 1999 sample.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 682 Mar 12 1999 targets.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : IX/22 Einstein extended deep survey (Primini+, 1991) ================================================================================ The CfA Eisntein observatory extended deep X-ray survey Primini F.A., Murray S.S., Huchra J., Schild R., Burg R., Giacconi R. <Astrophys. J. 374, 440 (1991)> =1991ApJ...374..440P ================================================================================ ADC_Keywords: QSOs ; X-ray sources Mission_Name: Einstein Keywords: quasars - X-ray: sources Description: The Einstein Deep Survey program (EDS) consists of very deep X-ray exposures in selected regions of the sky at high galactic latitude. The main purposes of the survey are to investigate the nature of the extragalactic X-ray background through direct source counts at very low flux levels and to study the nature of the very faint X-ray sources which comprise a significant fraction, if not all, of the soft X-ray background. The survey includes 9 IPC observations and 34 HRI observations, which, in general, cover the central 32'x32' regions of the IPC fields. In total, 178 IPC sources and 202 HRI sources were detected above thresholds set to allow  1 false source per observation. Data from all IPC energy bands and all HRI detect cells are included. The data are largely the result of standard Einstein Rev. 1 HRI and Rev. 1B IPC reprocessing; however, minor corrections to IPC count rates, fluxes, and flux significances have been made to account for different column densities toward various fields and small systematic errors in the IPC analysis of count rates and significances for long exposures. For further details please refer to the paper referenced above. The HRI field parameters have been determined from standard processing and from other information contained in the HRI .SDF file. For information on HRI sources, see the table "hsrc.dat"; for information on individual IPC fields, see the table "ifield.dat".

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