J/AJ/130/387 SDSS-ROSAT AGN data (Strateva+, 2005)
Soft X-ray and ultraviolet emission relations in optically selected AGN samples.
Strateva I.V., Brandt W.N., Schneider D.P., Vanden Berk D.E., Vignali C.
<Astron. J., 130, 387-405 (2005)>
=2005AJ....130..387S 2005AJ....130..387S
ADC_Keywords: Active gal. nuclei ; Ultraviolet ; X-ray sources
Keywords: galaxies: active - galaxies: evolution - galaxies: nuclei -
methods: statistical - ultraviolet: galaxies - X-rays: galaxies
Abstract:
Using a sample of 228 optically selected active galactic nuclei (AGNs)
in the 0.01-6.3 redshift range with a high fraction of X-ray detections
(81%-86%), we study the relation between rest-frame UV and soft X-ray
emission and its evolution with cosmic time. The majority of the AGNs
in our sample (155 objects) have been selected from the Sloan Digital
Sky Survey (SDSS) in an unbiased way, rendering the sample results
representative of all SDSS AGNs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 114 155 SDSS-ROSAT AGN data
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See also:
http://www.sdss.org : SDSS home page
J/AJ/126/2209 : X-ray AGN from RASS and SDSS (Anderson+, 2003)
J/AJ/124/3465 : AGN in KISS-RASS sample (Stevenson+, 2002)
IX/30 : Second ROSAT PSPC Catalog (ROSAT, 2000)
B/xmm : XMM-Newton Observation Log (XMM-Newton SOC, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SDSS]
5- 23 A19 --- SDSS The SDSS identification
(JHHMMSS.ss+DDMMSS.s)
25 A1 --- f_SDSS [12] ROSAT PSPC pointing or not (1)
27- 32 F6.4 --- z Spectroscopic redshift
34- 46 A13 --- ObsID ID of the X-ray observation
48- 51 F4.1 ks Texp Effective exposure time
53- 54 I2 arcmin delta Off-axis angle (2)
56- 61 F6.1 ct Cts Total source counts corrected for
background emission
63- 67 F5.2 [Jy] logF250nm Log of the 250nm flux density (3)
69- 74 F6.2 [mW/m2] logFX Log of the 0.5-2keV flux in units of
erg/cm2/s (3)
76- 80 F5.2 [Jy] log2keV Log of the 2keV flux density
82- 86 F5.2 --- Sp+Index Optical/UV-to-X-ray index (4)
88- 92 F5.2 [10-7W/Hz] logL2keV Log of the 2keV luminosity density (5)
94- 98 F5.2 [10-7W/Hz] logL250nm Log of the 250nm luminosity density (5)
100-104 F5.2 mag imag SDSS PSF i-band magnitude
106-111 F6.3 mag g-i Relative g-i color index (6)
113 I1 --- Flag [0/1] X-ray upper limit (0) or
detection (1)
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Note (1): Flag on SDSS, defined as follows:
1 = denotes an AGN which was the target of the ROSAT pointing;
2 = denotes an AGN with a XMM-Newton, Chandra, or a shorter ROSAT
pointing detection.
Note (2): Distance from the center of the pointing.
Note (3): No band-pass correction.
Note (4): Where Sp+Index=-0.3838log(F2keV/F250nm).
Note (5): Band-pass corrected and in units of erg/s/Hz.
Note (6): Corrected for Galactic extinction. The relative g-i color is the
g-i AGN color relative to the mean g-i AGN color at that redshift.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 24-Oct-2005