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 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:
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FileName Lrecl Records Explanations
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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
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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
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Bytes Format Units Label Explanations
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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)
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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.
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Acknowledgements: Carolin Liefke
(End) Carolin Liefke [Hamburger Sternwarte], Patricia Bauer [CDS] 05-Apr-2004