Access to Astronomical Catalogues

← Click to display the menu
J/A+A/506/711      Canis Major R1 X-ray sources          (Gregorio-Hetem+, 2009)

Star formation history of Canis Major R1. I. Wide-field X-ray study of the young stellar population. Gregorio-Hetem J., Montmerle T., Rodrigues C.V., Marciotto E., Preibisch T., Zinnecker H. <Astron. Astrophys., 506, 711-727 (2009)> =2009A&A...506..711G
ADC_Keywords: Associations, stellar ; X-ray sources ; Stars, pre-main sequence ; Photometry, infrared Keywords: stars: pre-main sequence - X-rays: stars - infrared: stars - ISM: clouds Abstract: The CMa R1 star-forming region contains several compact clusters as well as many young early-B stars. It is associated with a well-known bright rimmed nebula, the nature of which is unclear (fossil HII region or supernova remnant). To help elucidate the nature of the nebula, our goal was to reconstruct the star-formation history of the CMa R1 region, including the previously unknown older, fainter low-mass stellar population, using X-rays. We analyzed images obtained with the ROSAT satellite, covering ∼5deg2. Complementary VRI photometry was performed with the Gemini South telescope. Colour-magnitude and colour-colour diagrams were used in conjunction with pre-main sequence evolutionary tracks to derive the masses and ages of the X-ray sources. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 93 98 X-ray sources detected in CMa R1 by ROSAT tablea2.dat 47 16 List of ROSAT sources observed by XMM-Newton or Chandra
See also: IX/30 : Second ROSAT PSPC Catalog (ROSAT, 2000) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- CMaX [1/98] Source name (1) 3 A1 --- n_CMaX [*] *: Relevant sources: H-K excess 4 A1 --- X [x] x: Objects detected by XMM-Newton and/or Chandra 5- 6 A2 --- Note Individual notes on CMaX (2) 8- 9 I2 arcsec Err Diameter of the position error circle 11- 14 F4.1 ct/ks CRate X-ray count rate 16- 18 F3.1 ct/ks e_CRate rms uncertainty on CRate 20- 23 F4.1 --- S/N X-ray signal-to-noise ratio 25- 29 F5.2 [10-7W] logLX X-ray luminosity 31- 32 I2 h RAh Optical counterpart Right ascension (J2000) 34- 35 I2 min RAm Optical counterpart Right ascension (J2000) 37- 40 F4.1 s RAs Optical counterpart Right ascension (J2000) 42 A1 --- DE- Optical counterpart Declination sign (J2000) 43- 44 I2 deg DEd Optical counterpart Declination (J2000) 46- 47 I2 arcmin DEm Optical counterpart Declination (J2000) 49- 50 I2 arcsec DEs Optical counterpart Declination (J2000) 51 A1 --- uc [)] Uncertainty flag on optical position 53- 56 F4.1 mag Rmag ?=- R magnitude 58- 60 F3.1 mag AV ?=- Extinction in V band 62- 65 F4.1 mag Jmag ?=- 2MASS J magnitude 67- 70 F4.1 mag Hmag ?=- 2MASS H magnitude 72- 75 F4.1 mag Kmag ?=- 2MASS K magnitude 77 A1 --- l_Age Limit flag on Age 78- 79 I2 Myr Age ? Age estimation based on near-IR data 80 A1 --- --- [-] 81- 82 I2 Myr Age2 ? Second value of Age when interval 83 A1 --- u_Age [?] Uncertainty flag on Age 85 A1 --- l_Mass Limit flag on Mass 86- 88 F3.1 solMass Mass ? Mass estimation based on near-IR data 89 A1 --- --- [-] 90- 92 F3.1 solMass Mass2 ? Second value of Mass when interval 93 A1 --- u_Mass [?] Uncertainty flag on Mass
Note (1): CMaX 1 to 56 (Field 1), CMaX 62 to 98 (Field 2), CMaX 57 to 61 (both fields) Note (2): Notes (here [C74] indicates Claria 1974AJ.....79.1022C, and [SEI99] Shevchenko et al., 1999, Cat. J/MNRAS/310/210), as follows: a = HD 51896 (F5) b = SS 75 c = HD 52014 (F5) d = HD 52385 (K0) e = GU CMa, HD 52721 (B2V), [C74] 63 , [SEI99] 158 f = FZ CMa (B2.5), [C74] 67, [SEI99] 159 g = Z CMa (Bpe), [C74] 76, [SEI99] 161 h = BD -111762 (B2), [C74] 77, [SEI99] 92 i = [C74] 14, [SEI99] 94 j = Member of cluster vdB-RN92 (VDB 92 in Simbad) k = Member of cluster BRC 27 (NAME BRC 27 STAR CLUSTER in Simbad) l = [SEI99] 99 m = Member of cluster NGC 2327 n = [SEI99] 111 o = HD 53339 (B3), C84, [SEI99] p = HD 53396 (B9), [SEI99] 112
Byte-by-byte Description of file: tablea2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- CMaX [1/98] Source name 4- 19 A16 --- 2MASS 2MASS name 21- 23 A3 --- Num Source number (CNN or XNN) (1) 25- 26 I2 h RAh Right ascension (J2000) (2) 28- 29 I2 min RAm Right ascension (J2000) (2) 31- 35 F5.2 s RAs Right ascension (J2000) (2) 37 A1 --- DE- Declination sign (J2000) (2) 38- 39 I2 deg DEd Declination (J2000) (2) 41- 42 I2 arcmin DEm Declination (J2000) (2) 44- 47 F4.1 arcsec DEs Declination (J2000) (2)
Note (1): Source number in the Chandra (C) or XMM-Newton (X) images. Note (2): Positional deviations from the coordinates of near-IR counterparts (2MASS) are less than 2" arcsec for Chandra sources and less than 3".
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 12-Jan-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

catalogue service

© UDS/CNRS

Contact