J/AJ/127/156 Soft X-Ray-Selected AGNs complete sample (Grupe+, 2004)
A complete sample of soft X-Ray-Selected AGNs. I. The data.
Grupe D., Wills B.J., Leighly K.M., Meusinger H.
<Astron. J., 127, 156-179 (2004)>
=2004AJ....127..156G 2004AJ....127..156G
ADC_Keywords: Active gal. nuclei ; QSOs ; X-ray sources
Keywords: galaxies: active - quasars: general
Abstract:
We present the optical spectra and simple statistical analysis for a
complete sample of 110 soft X-ray-selected AGNs. About half of the
sources are narrow-line Seyfert 1 galaxies (NLS1's), which have the
steepest X-ray spectra, the strongest Fe II emission, and slightly
weaker [O III] λ5007 emission than broad-line Seyfert 1's
(BLS1's). Kolmogorov-Smirnov tests show that NLS1's and BLS1's have
clearly different distributions of the X-ray spectral slope
αX, X-ray short-term variability, and Fe II equivalent widths
and luminosity and Fe II/Hβ ratios.
Description:
In addition to the RASS data, available for all sources, about 50 have
pointed PSPC observations and are available from the ROSAT public
archive at MPE Garching.
Optical spectroscopy data in the rest-frame Hβ region were
collected over a period of 10 years using various observatories and
telescopes.
All observations of objects with southern declination prior to 1995
were observed with the MPI/ESO 2.2m telescope at La Silla (ESO2.2 in
Table 1). At that time, the 2.2m was equipped with the ESO Faint
Object Camera and Spectrograph (EFOSC), which had a selection of
different grisms for spectroscopy.
The observations in 1995 and 1999 were performed with ESO's 1.52m
telescope equipped with the Boller & Chivens (B&C) spectrograph.
The telescope used for most northern hemisphere observations was the
2.1m Otto Struve telescope at McDonald Observatory.
A number of sources were observed with the Large Cassegrain
Spectrograph (LCS) on the 2.7m Harlan-Smith Telescope at McDonald
A few objects were observed with the 4 m Blanco telescope at the Cerro
Tololo Inter-American Observatory in Chile (CTIO4.0 in Table 1).
Observatory.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 132 110 Summary of the optical spectroscopy of the soft
X-ray-selected sample
table2.dat 70 110 Line Measurements of the Soft X-Ray AGN Sample
table3.dat 56 110 X-Ray Spectral Index, Luminosities, and X-ray
Variability Parameter of the Soft X-Ray AGN Sample
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See also:
IX/19 : X-ray light-curves of bright AGNs from Ginga (Hayashida+ 1998)
J/A+A/309/81 : X-ray properties of AGN (Wang+, 1996)
J/A+A/350/805 : X-ray selected ROSAT AGN spectra (Grupe+, 1999)
J/AJ/126/2209 : X-ray AGN from RASS and SDSS (Anderson+, 2003)
J/ApJ/434/54 : Spectral properties of X-ray-selected AGNs (Thompson+ 1994)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number
5- 6 I2 h RAh Right ascension (J2000.0)
8- 9 I2 min RAm Right ascension (J2000.0)
11- 14 F4.1 s RAs Right ascension (J2000.0)
16 A1 --- DE- Declination sign (J2000.0)
17- 18 I2 deg DEd Declination (J2000.0)
20- 21 I2 arcmin DEm Declination (J2000.0)
23- 24 I2 arcsec DEs Declination (J2000.0)
26- 41 A16 --- Name Name
44- 53 A10 --- Obs.Date Observing UT date, YYYY/MM/DD (1)
55- 61 A7 --- Tel Telescope designation
63- 76 A14 --- Inst Instrument
79- 88 A10 min Texp Exposition times, in min
91-140 A50 --- Com Comments
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Note (1): When the day of observation is not specified, this is the mean of
several spectra observed under different weather conditions.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq AGN sample sequential number
5- 20 A16 --- Name AGN name
22- 26 F5.3 --- z Redshift
28- 31 I4 km/s FWHM-HB The Hβ full width at half-maximum
33- 36 I4 km/s e_FWHM-HB Error in FWHM-HB
38- 41 I4 km/s FWHM-OIII The [O III] (5007Å) full width at
half-maximum
43- 45 I3 km/s e_FWHM-OIII Error in FWHM-OIII
47- 49 I3 0.1nm EW-HB The Hβ equivalent width in angstroms
51- 52 I2 0.1nm e_EW-HB Error in EW-HB
54- 56 I3 0.1nm EW-OIII The [O III] (5007Å) equivalent width
58- 59 I2 0.1nm EW-FeII The Fe II (4570Å blend) equivalent width
61- 64 F4.2 --- OIII/HB The [O III] (5007Å) to Hβ ratio
66- 69 F4.2 --- FeII/HB The Fe II (4570 Å blend) to Hβ ratio
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq AGN sample sequential number
5- 20 A16 --- Name AGN name
22- 25 F4.2 --- alphaX Soft X-ray 0.2-2.0 keV spectral
index (Grupe et al., 2001A&A...367..470G 2001A&A...367..470G)
27- 31 F5.2 [W] logL Logarithm of the rest frame 0.2-2.0 X-ray
luminosity
33- 37 F5.2 [W] logL5100 Logarithm of the optical monochromatic
luminosity at 5100 angstroms
39- 43 F5.2 [W] logLbol Logarithm of the bolometric luminosity (1)
45- 49 F5.2 [W] logLHB Logarithm of the Hβ luminosity
51- 55 F5.2 --- VarPar Soft X-ray short-term variability χ2/ν
parameter (Grupe et al., 2001A&A...367..470G 2001A&A...367..470G)
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Note (1): Estimated from a combined power-law model fit with exponential cutoff
to the optical-UV data and a power law with absorption due to neutral
elements, to the soft X-ray data (see Fig. 2). Note that because the
EUV part of the spectral energy distribution of AGNs is unobservable,
there are large uncertainties in the bolometric luminosity (e.g.,
Elvis et al., 1994ApJ...422...60E 1994ApJ...422...60E), and the values given here are only
approximate.
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History:
* 13-Feb-2004: From electronic version of the journal
* 26-Apr-2006: a few mis-spelled names corrected in table3:
RX J1304.2+0502 corrected into RX J1304.2+0205,
AM 2254-304 corrected into AM 2354-304
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Feb-2004