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J/A+A/417/651       NEXXUS ROSAT survey of coronal X-ray     (Schmitt+, 2004)

NEXXUS: A comprehensive ROSAT survey of coronal X-ray emission among nearby solar-like stars. Schmitt J.H.M.M., Liefke C. <Astron. Astrophys., 417, 651-665 (2004)> =2004A&A...417..651S
ADC_Keywords: X-ray sources ; Stars, late-type ; Stars, nearby Keywords: stars: activity - stars: coronae - stars: late-type - X-rays: stars Description: We present a final summary of all ROSAT X-ray observations of nearby stars. All available ROSAT observations with the ROSAT PSPC, HRI and WFC have been matched with the CNS4 catalog of nearby stars and the results gathered in the NEarby X-ray and XUV-emitting Stars (NEXXUS) data base. New volume-limited samples of F/G-stars (table 1), K-stars (table 2), and M-stars (table 3) are constructed within which detection rates of more than 90% are obtained. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 74 133 Optical and X-ray properties of F/G-type stars table2.dat 74 94 Optical and X-ray properties of K-type stars table3.dat 74 105 Optical and X-ray properties of M-type stars
See also: IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999) IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000) IX/28 : ROSAT HRI Pointed Observations (1RXH) (ROSAT Team, 2000) IX/30 : Second ROSAT PSPC Catalog (ROSAT, 2000) IX/32 : ROSAT Bright Survey (Fischer+, 1998-2000) http://www.hs.uni-hamburg.de/DE/For/Gal/Xgroup/nexxus : NEXXUS Home Page Byte-by-byte Description of file: table1.dat table2.dat table3.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Designation (mainly Gliese catalog) 15- 19 F5.2 mag VMAG ? Absolute magnitude in V band 21- 27 A7 --- SpType MK Spectral type 29- 33 F5.2 pc Dist Heliocentric distance 35 A1 --- Mode [SPFH] ROSAT Observation mode (1) 37 A1 --- l_CRate Limit flag on CRate 38- 45 F8.6 ct/s CRate ROSAT count rate 47- 54 F8.6 ct/s e_CRate ? Count rate error 56- 61 F6.1 --- like/SN ? (?=9999.0) Likelihood (Mode SPF) or Signal-to-Noise-Ratio (Mode H) (2) 63- 68 I6 s ExpTime ? Exposure time 70- 74 F5.2 [10-7W] logLX ? X-ray luminosity (in cgs-units)
Note (1): ROSAT Observation mode: S = ROSAT All-Sky Survey, Cat. IX/10 P = pointed observation with the PSPC, Cat. IX/30 F = pointed observation with the PSPC with boron filter, Cat. IX/30 H = pointed observation with the HRI, Cat. IX/28 Note (2): For the ROSAT All-Sky Survey and the pointed observations with the PSPC the source likelihood is given, for HRI observations the signal- to-noise ratio. For count rate upper limits always the likelihood is given independently from the observing mode.
Acknowledgements: Carolin Liefke
(End) Carolin Liefke [Hamburger Sternwarte], Patricia Bauer [CDS] 05-Apr-2004
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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