Abstract
We present the first volume of the Einstein quasar database. The database includes estimates of the X-ray count rates, fluxes, and luminosities for 514 quasars and Seyfert 1 galaxies observed with the Imaging Proportional Counter (IPC) aboard the Einstein Observatory. All were previously known optically selected or radio-selected objects, and most were the targets of the X-ray observations. The X-ray properties of the Active Galactic Nuclei (AGNs) have been derived by reanalyzing the IPC data in a systematic manner to provide a uniform database for general use by the astronomical community. We use the database to extend earlier quasar luminosity studies which were made using only a subset of the currently available data. The database can be accessed on internet via the SAO Einstein on-line system ('Einline') and is available in ASCII format on magnetic tape and DOS diskette.
Highlights
Einstein observations have shown that most, if not all, quasars are luminous X-ray sources (Tananbaum et al 1979; Avni & Tananbaum 1986, hereafter AT86 )
The database includes estimates of the X-ray count rates, fluxes, and luminosities for 514 quasars and Seyfert 1 galaxies observed with the Imaging Proportional Counter (IPC) aboard the Einstein Observatory
The database can be accessed on internet via the SAO Einstein on-line system (“Einline”) and is available in ASCII format on magnetic tape and DOS diskette
Summary
Einstein observations have shown that most, if not all, quasars are luminous X-ray sources (Tananbaum et al 1979; Avni & Tananbaum 1986, hereafter AT86 ). Einstein observations of statistically well-defined samples (see § 3) have been used to carry out analyses of quasar luminosity and evolution functions in the X-ray band. Most of these Einstein observations of quasars (and all of those reported in this paper) were carried out with the Imaging Proportional Counter (Giacconi et al 1979). A large number (~1000) of quasars and active galaxies (AGNs) were observed from 1978 to 1981 as part of many different observing programs with the IPC Many of these data have been analyzed and published elsewhere under the original. The data are presented in a series of tables as follows: Table 1 gives the basic information on each quasar; Table 2 gives details of the Einstein observations; Tables 3A-3C give the X-ray fluxes and luminosities for five different assumed energy indices: 0.0,0.5, 1.0, 1.5, and 2.0; Tables 5A and 5B list objects and observations missing from our database; Table 6 gives optical magnitudes and luminosities
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