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J/A+A/519/A17       X-ray/UV ratio of 2XMM AGN                 (Vagnetti+, 2010)

Variability and the X-ray/UV ratio of active galactic nuclei. Vagnetti F., Turriziani S., Trevese D., Antonucci M. <Astron. Astrophys., 519, A17-17 (2010)> =2010A&A...519A..17V
ADC_Keywords: QSOs ; Active gal. nuclei ; X-ray sources ; Ultraviolet Keywords: surveys - galaxies: active - quasars: general - X-rays: galaxies Abstract: The observed relation between the X-ray radiation from active galactic nuclei, originating in the corona, and the optical/UV radiation from the disk is usually described by the anticorrelation between the UV to X-ray slope αox and the UV luminosity. Many factors can affect this relation, including: i) enhanced X-ray emission associated with the jets of radio-loud AGNs, ii) X-ray absorption associated with the UV broad absorption line (BAL) outflows, iii) other X-ray absorption not associated with BALs, iv) intrinsic X-ray weakness, v) UV and X-ray variability, and non-simultaneity of UV and X-ray observations. The separation of these effects provides information about the intrinsic αox-LUV relation and its dispersion, constraining models of disk-corona coupling. We use simultaneous UV/X-ray observations to remove the influence of non-simultaneous measurements from the αox-LUV relation. Description: We extract simultaneous data from the second XMM-Newton serendipitous source catalogue (XMMSSC) and the XMM-Newton Optical Monitor Serendipitous UV Source Survey catalogue (XMMOMSUSS), and derive the single-epoch αox indices. We use ensemble structure functions to analyse multi-epoch data. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 79 315 Sources studied in the paper
See also: IX/41 : XMM-Newton Serendipitous Source Catalogue 2XMMi-DR3 (XMM-SSC, 2010) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [1/241] Source sequential number 5 I1 --- Nepo ? Epoch serial number 7- 10 A4 --- --- [2XMM] 12- 27 A16 ---- 2XMM 2XMM source name (JHHMMSS.s+DDMMSS) 30- 38 F9.3 d Epoch Epoch of observation (MJD) 40- 44 F5.3 --- z Redshift 46- 47 I2 --- fRL [-1/1] Radio-loud flag (1=radio-loud) (1) 49 I1 --- fBAL [0/1] BAL flag (1=BAL, 2=non-BAL) 51- 55 F5.2 [10-7W/Hz] logLUV UV (2500Å) luminosity 57- 61 F5.2 [10-7W/Hz] logLX X-ray (2keV) luminosity 63- 67 F5.2 --- alp.ox UV to X-ray power law index (3) 69- 73 F5.2 --- Dalp.ox Residual of αox 75- 79 F5.2 --- HR3 Hardness ratio between bands 1-2 and 2-4.5keV
Note (1): RL flag as follows: 1 = radio-loud 0 = radio-quiet -1 = radio-unclassified Note (3): index α where Lν∝να
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 15-Dec-2010
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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