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J/A+A/298/115       ROSAT study of Praesepe                     (Randish+, 1995)

A ROSAT X-ray study of the Praesepe cluster Randich S., Schmitt J.H.M.M. <Astron. Astrophys. 298, 115 (1995)> =1995A&A...298..115R (SIMBAD/NED Reference)
ADC_Keywords: Clusters, open; X-ray sources Keywords: open cluster and associations: individual (Praesepe) - stars: coronae - X-ray: stars Description: We present the results of the ROSAT PSC observations of the Praesepe cluster. 68 Praesepe candidates have been detected, above a threshold of ∼2x10+28erg/s (2x1021W), in the ∼4degx4deg area of the cluster covered by the observations. 56 out of the 68 detected objects are cataloged as high probability Praesepe members. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2 101 68 Optical properties of X-ray detected Praesepe candidates table4 63 68 X-ray properties of the detected Praesepe candidates table5 57 12 Undetected Praesepe candidates lying in the low sensitivity image region table2.tex 86 171 LaTeX version of table2 table4.tex 107 122 LaTeX version of table4 table5.tex 72 44 LaTeX version of table5
Byte-by-byte Description of file: table2
Bytes Format Units Label Explanations
2- 3 I2 --- Id [1/68] X-ray number 10- 15 A6 --- OtherId Optical identification (1) 21- 22 I2 h RAh Right ascension J2000 24- 25 I2 min RAm Right ascension J2000 27- 31 F5.2 s RAs Right ascension J2000 37 A1 --- DE- Declination sign 38- 39 I2 deg DEd Declination J2000 41- 42 I2 arcmin DEm Declination J2000 44- 47 F4.1 arcsec DEs Declination J2000 49- 53 F5.2 mag Vmag V magnitude 56- 59 F4.2 mag B-V []? B-V colour 62- 65 F4.2 mag V-I []? V-I colour 69- 70 I2 % Proba []? Membership probability 71 A1 --- n_Proba [p] A 'p' means possible 74- 79 A6 --- Sp Spectral type 82-101 A20 --- Notes Notes
Note (1): KW: Klein-Wassink (1927) JC: Jones & Cudworth (1983) JS: Jones & Stauffer (1991)
Byte-by-byte Description of file: table4
Bytes Format Units Label Explanations
2- 3 I2 --- Id X-ray number 4 A1 --- n_Id [*] Note 8- 12 F5.1 --- ML Maximum Likelihood (ML) algorithm 14- 19 F6.2 arcsec dRA []? Offset in right ascension 21- 26 F6.2 arcsec dDE []? Offset in declination 28- 33 F6.4 ct/s ct Counts 35- 40 F6.4 ct/s e_ct rms uncertainty on counts (1 sigma error) 42- 45 F4.1 10+22W Lx X-ray luminosity 47- 49 F3.1 10+22W e_Lx rms uncertainty on Lx (1 sigma error) 51- 56 E6.2 --- Lx/Lbol X-ray over bolometric luminosity 58 A1 --- l_HardR [>] limit flag on HardR 59- 63 F5.2 --- HardR Hardness ratio
Byte-by-byte Description of file: table5
Bytes Format Units Label Explanations
1- 6 A6 --- Name Star name 8- 9 I2 h RAh Right ascension J2000 11- 12 I2 min RAm Right ascension J2000 14- 17 F4.1 s RAs Right ascension J2000 18 A1 --- DE- Declination sign 19- 20 I2 deg DEd Declination J2000 22- 23 I2 arcmin DEm Declination J2000 25- 26 I2 arcsec DEs Declination J2000 28- 32 F5.2 mag V V magnitude 34- 37 F4.2 mag B-V []? B-V colour 40- 43 F4.2 mag V-I []? V-I colour 45- 46 I2 % Proba Membership probability 48- 53 F6.4 ct/s Upct Upper limit on counts 55- 57 F3.1 10+22W Lx Upper limit on X-ray luminosity (1029erg/s)
References: Klein-Wassink W.J. 1927, Publ. Kepyen Astron. Lab. Nr 41 Jones B.F., Cudworth K., 1983, AJ 88, 215 Jones B.F., Staufer J.R. 1991, AJ 102, 1080
(End) Patricia Bauer [CDS] 24-Nov-1994
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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