XTEASSAGN - XTE All-Sky Slew Survey AGN Catalog
Most of these AGN belong to the local population (z < 0.1). For each confirmed AGN source, the following information is provided: AGN class, the count rate in two energy bands (3-8 keV and 8-20 keV), the observed and intrinsic (absorption-corrected) luminosity in the 3 - 20keV band, and the intrinsic absorption column density. For the AGN candidates, composed of unidentified XSS sources, the following information is provided: the count rate in two energy bands (3-8 keV and 8-20 keV), the estimated intrinsic absorption column density, and information about RASS Bright Source Catalog and HEAO A-1 X-ray source counterparts.
Statistical properties of local active galactic nuclei inferred from the RXTE 3-20 keV All-Sky Survey. Sazonov S.Yu., Revnivtsev M.G. <Astron. Astrophys. 423, 469 (2004)> =2004A&A...423..469S
The recommended RXTE Slew Survey Catalog source designation, using the prefix 'XSS J' and the truncated J2000 source coordinates.
A common alternative name for the XSS source.
The Right Ascension of the source.
The Declination of the source.
The Galactic Longitude of the source.
The Galactic Latitude of the source.
For the confirmed AGN from Table 1 of the published catalog, an AGN classification is given according to the key below (the AGN candidates listed in Table 2 of the published catalog have not been assigned any value for this parameter):
Value: Meaning RQQ: radio-quiet quasar RLQ: radio-loud quasar BL: blazar (BL Lac object or flat-spectrum radio quasar) S1: Seyfert 1 galaxy (types 1, 1.2 and 1.5) NLS1: narrow-line Seyfert 1 galaxy S2: Seyfert 2 galaxy (types 1.8, 1.9 and 2) RG: radio galaxy BLRG: broad-line radio galaxy NLRG: narrow-line radio galaxy LLAGN: low luminosity AGN
The count rate for the X-ray source in the 3-8 keV energy band, in units of ct/s/PCU. These count rates have been obtained by averaging over multiple slews performed at random times over the period from 1996 - 2002. It is important to note that, in contrast to the original XSS Catalog, the uncertainties quoted here do not take into account RXTE slews related to pointings at the sources. The current sample is thus effectively serendipitous.
The 1-sigma statistical error in the 3-8 keV count rate, in units of ct/s/PCU.
The count rate for the X-ray source in the 8-20 keV energy band, in units of ct/s/PCU. These count rates have been obtained by averaging over multiple slews performed at random times over the period from 1996 - 2002. It is important to note that, in contrast to the original XSS Catalog, the uncertainties quoted here do not take into account RXTE slews related to pointings at the sources. The current sample is thus effectively serendipitous.
The 1-sigma statistical error in the 8-20 keV count rate, in units of ct/s/PCU.
The redshift of the AGN. The luminosity distances were calculated from the known redshifts assuming a cosmology with the Hubble constant = 75 km s^-1 Mpc^-1, Omega_m = 0.3, and Omega_Lambda = 0.7, except for 10 nearby sources with redshifts less than or equal to 0.01 for which the distances from the Nearby Galaxies Catalog of Tully (1988) were adopted.
The distance from the Nearby Galaxies Catalog of Tully (1988), adopted for 10 nearby sources with redshifts less than or equal to 0.01, in Megaparsecs (Mpc).
The observed X-ray luminosity in the observer's 3-20 keV energy band, in erg/s. This was calculated from the measured 3-20 keV count rate (the sum of the 3-8 and 8-20 keV count rates) by taking into account the spectral response of the RXTE/PCA instrument and assuming a power-law spectrum of photon index = 1.8 with a low-energy cutoff due to intrinsic absorption.
The intrinsic (absorption-corrected) X-ray luminosity in the observer's 3-20 keV energy band, in erg/s. This was calculated by correcting the observed 3-20 keV luminosity for the intrinsic absorption.
A limit flag parameter for the absorption column density. The quoted limits are 1-sigma if based on the XSS hardness ratio, and are more conservative in other cases.
The intrinsic absorption column density, n_H, in cm^-2. The way that this was calculated is discussed in detail in Section 2.1 of the published version of this catalog.
The 1-sigma error in the absorption column density, in cm^-2.
A parameter containing a code for the reference for the quoted column density according to the following key:
Value: Reference 1: XSS catalog, Revnivtsev et al., 2004, CDS Cat. <J/A+A/418/927> 2: RXTE/PCA pointing observations 3: TARTARUS/ASCA database 4: Turner, Pounds, 1989MNRAS.240..833T 5: Wolter et al., 1998A&A...335..899W 6: Young, Wilson, 2004ApJ...601..133Y 7: Risaliti, 2002A&A...386..379R 8: Matt et al., 2000MNRAS.318..173M 9: Reynolds, 1997MNRAS.286..513R 10: Awaki et al., 1991PASJ...43..195A 11: ASCA public data 12: Reeves & Turner, 2000MNRAS.316..234R 13: Ghosh & Soundararajaperumal, 1992MNRAS.259..175G
A parameter which flags that there has been a previous X-ray detection of the source, where 'a' means a previous X-ray detection only below 2 keV in the Rosat All-Sky Survey and 'b' a previous X-ray only marginal detection by HEAO-1/A2 (Della Ceca et al., 1990, CDS Cat. <VII/181>).
This parameter lists the name of the likely soft X-ray counterpart from the ROSAT All-Sky Survey Bright Source Catalog (RASSBSC) for the AGN candidates from Table 2 of the published catalog.
This parameter lists any possible association with a HEAO A-1 Source for the AGN candidates from Table 2 of the published catalog.
The HEASARC Browse object classification, based on the agn_type parameter. All of the AGN candidates have been assigned a Class of 'Unidentified' by the HEASARC.