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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 114 155 SDSS-ROSAT AGN data
See also: : 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
Bytes Format Units Label Explanations
1- 4 A4 --- --- [SDSS] 5- 23 A19 --- SDSS The SDSS identification ( 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)
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.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 24-Oct-2005
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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