Soft X-ray properties of Seyfert galaxies (Pfefferkorn+, 2001)

Details Soft X-ray properties of Seyfert galaxies (Pfefferkorn+, 2001) Soft X-ray properties of Seyfert galaxies (Pfefferkorn+, 2001)

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ycat..33680797p&link_type=abstract

VizieR On-line Data Catalog: J/A+A/368/797. Originally published in: 2001A&A...368..797P

Other

Galaxies: Seyfert, X-Ray Sources

Scientific paper

We have detected 91 out of 99 Seyfert 1 and 47 out of 98 Seyfert 2 galaxies of the Rafanelli sample in the ROSAT X-ray band in pointed and/or All-Sky Survey observations. Spectral information from the survey data could be obtained for 59 Seyfert 1 galaxies and only for one Seyfert 2 galaxy. The tables quote the name of the Seyfert galaxy in column 1 and the ROSAT name in column 2. Columns 3 and 4 contain the ROSAT position. We mostly give the centroid source position from the pointed observation with the higher exposure times. The columns 5 and 6 list the count rates, columns 7 and 8 the corresponding exposure times, columns 9 and 10 the fluxes and columns 11 and 12 the luminosities of the sources detected in ROSAT pointing and survey observations, respectively. The survey count rates were taken from the RASS II catalogue and the pointing count rates were computed from the light curves of the sources. The labels "(p)" and "(h)" in column 5 indicate that the source data are taken from a PSPC or HRI observation. In the columns 9 and 10 we apply the labels "(f)" and "(c)" to mark the data produced by spectral fit or by count rates. This specification applies also for columns 11 and 12. The Galactic column density is given in column 13 (Dickey & Lockman, 1990ARA&A..28..215D), while the column density obtained from the spectral fit is given in column 14. The other spectral fit parameters, namely the monochromatic flux at 1keV and the photon index are also given in columns 15 and 16, respectively. The value "-2.3" of the photon index was used, if no reliable spectral fit could be obtained. When spectral information was available from the survey as well as from the pointed data, we quote the results from the pointed observations. Columns 17 and 18 show the quality of the X-ray identifications both in the pointing and the survey observations, the identifications labeled either with 1 or 2, 1 and 2 indicating high and lower degree of reliability, respectively. In the last column we have listed the classification of the Seyfert type (Sy1.0, Sy1.2, Sy1.5, Sy1.8, Sy1.9, Sy2.0) taken from the "Catalogue of Seyfert Galaxies" (Lipovetski et al., 1987, Cat. ). We have modified the Rafanelli et al. conventions (S1 = Sy1.0 + Sy1.2 + Sy1.5 and S2 = Sy1.8 + Sy1.9 + Sy2.0) to S1 = Sy1.0 + Sy1.2 + Sy1.5 + Sy1.8 + Sy1.9 and S2 = S2.0. The classifications marked by a (N) indicate Narrow Line Seyfert 1 galaxies (NLS1) (e.g. Osterbrock & Pogge, 1985ApJ...297..166O; Boller, Brandt & Fink 1996A&A...305...53B; Grupe 1996, Properties of bright soft X-ray selected ROSAT AGN, Dissertation submitted Georg-August University, Gvttingen, Germany ). For each source of the Rafanelli sample we have searched for X-ray detections within the ROSAT All-Sky Survey (RASS II catalogue; see Voges, Aschenbach, Boller et al., 1999, Cat. for references) and public PSPC (Position Sensitive Proportional Counter) and HRI (High Resolution Imager) pointed observations. The sources have been identified on X-ray contour maps overlaid to optical images taken from the Palomar Digitized Sky Survey (DSS). We have generated background subtracted contour maps for each selected ROSAT observation. Overlays with a dark background indicate pointed observations (HRI for HRI-data, without label for PSPC-data), whereas the grey background indicate ROSAT All-Sky survey data (PSPC). (2 data files).

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