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J/A+A/461/669       XMM observations of Cha I dark cloud    (Robrade+, 2007)

A deep XMM-Newton X-ray observation of the Chamaeleon I dark cloud. Robrade J., Schmitt J.H.M.M. <Astron. Astrophys., 461, 669-678 (2007)> =2007A&A...461..669R
ADC_Keywords: X-ray sources ; Stars, late-type ; Stars, pre-main sequence Keywords: stars: activity - stars: coronae - stars: late-type - stars: pre-main sequence - X-rays: stars Abstract: Low-mass stars are known to exhibit strong X-ray emission during the early stages of evolution. Nearby star forming regions are ideal targets to study the X-ray properties of pre-main sequence stars. Aims. A deep XMM-Newton exposure is used to investigate X-ray properties of the pre-main sequence population of the Chamaeleon I star forming region. The northern-eastern fringe of the Chameleon I dark cloud was observed with XMM-Newton, revisiting a region observed with ROSAT 15 years ago. Centered on the extended X-ray source CHXR 49 we are able to resolve it into three major contributing components and to analyse their spectral properties. Furthermore, the deep exposure allows not only the detection of numerous, previously unknown X-ray sources, but also the investigation of variability and the study of the X-ray properties for the brighter targets in the field. We use EPIC spectra, to determine X-ray brightness, coronal temperatures and emission measures for these sources, compare the properties of classical and weak-line T Tauri stars and make a comparison with results from the ROSAT observation. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 149 71 X-ray source list in Cha I dark cloud
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) B/denis : The DENIS database (DENIS Consortium, 2005) IX/37 : XMM-Newton Serendipitous Source Catalogue (1XMM) (XMM-SSC, 2003) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 2 I2 --- CHXX [1/71]+ Sequential number 4- 5 I2 h RAh Right ascension (J2000) 7- 8 I2 min RAm Right ascension (J2000) 10- 13 F4.1 s RAs Right ascension (J2000) 15 A1 --- DE- Declination sign (J2000) 16- 17 I2 deg DEd Declination (J2000) 19- 20 I2 arcmin DEm Declination (J2000) 22- 25 F4.1 arcsec DEs Declination (J2000) 27 I1 arcsec e_Pos Positional error 29- 34 F6.3 0.1ct/s CRPN ?=- PN count-rate in 0.5-7.5keV band (1) 35 A1 --- n_CRPN [P] P if source without useful data by the detector PN 36- 41 E6.2 ct/s CRPNs ? PN count-rate in 0.5-1.0keV band 42 A1 --- --- '/' 43- 48 E6.2 ct/s CRPNm ? PN count-rate in 1.0-2.0keV band 49 A1 --- --- '/' 50- 55 E6.2 ct/s CRPNh ? PN count-rate in 2.0-7.5keV band 57- 61 F5.3 0.1ct/s CRMOS1 ?=- MOS1 count-rate in 0.5-7.5keV band (1) 62- 63 A2 --- n_CRMOS1 [M1 ] M1 if source without useful data by the detector M1 64- 69 E6.2 ct/s CRMOS1s ? MOS1 count-rate in 0.5-1.0keV band 70 A1 --- --- '/' 71- 76 E6.2 ct/s CRMOS1m ? MOS1 count-rate in 1.0-2.0keV band 77 A1 --- --- '/' 78- 83 E6.2 ct/s CRMOS1h ? MOS1 count-rate in 2.0-7.5keV band 85- 89 F5.3 0.1ct/s CRMOS2 ?=- MOS2 count-rate in 0.5-7.5keV band (1) 91- 97 E7.3 ct/s CRMOS2s ? MOS2 count-rate in 0.5-1.0keV band 98 A1 --- --- '/' 99-104 E6.2 ct/s CRMOS2m ? MOS2 count-rate in 1.0-2.0keV band 105 A1 --- --- '/' 106-111 E6.2 ct/s CRMOS2h ? MOS2 count-rate in 2.0-7.5keV band 113-131 A19 --- 2M/D-ID 2MASS (2M) or DENIS (D) identification (2) 133-149 A17 --- Names Other names (3)
Note (1): Sources that are not present in a detector are marked by dashes. Note (2): 2M for 2MASS J, D for DENIS database 3rd release Note (3): Other names use the prefixes: CHXR = Feigelson et al. (1993ApJ...416..623F) Hn = Hartigan (1993AJ....105.1511H) Sz = Schwartz (1977ApJS...35..161S) CCE = Cambresy et al. (1998A&A...338..977C), [CCE98] N-NNN in Simbad ChaI = Lopez Marti et al. (2004, Cat. J/A+A/416/555), [LES2004] ChaI NNN in Simbad U = USNO-B1.0 catalog, Cat. I/284
History: From electronic version of the journal * 05-Oct-2007: Original version * 10-Dec-2007: 1 other name corrected
(End) Patricia Vannier [CDS] 31-Aug-2007
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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