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J/A+A/477/125       Microquasar candidates                   (Combi+, 2008)

A new search strategy for microquasar candidates using NVSS/2MASS and XMM-Newton data. Combi J.A., Albacete-Colombo J.F., Marti J. <Astron. Astrophys., 477, 125-132 (2008)> =2008A&A...477..125C
ADC_Keywords: X-ray sources ; Radio sources ; Infrared sources ; QSOs Keywords: radio continuum: general - X-rays: binaries - infrared: stars - stars: early-type - catalogs Abstract: Microquasars are ideal natural laboratories for understanding accretion/ejection processes, studying the physics of relativistic jets, and testing gravitational phenomena. Nevertheless, these objects are difficult to find in our Galaxy. The main goal of this work is to increase the number of known systems of this kind, which should allow better testing of high-energy phenomena and more realistic statistical studies of this galactic population to be made. We have developed an improved search strategy based on positional cross-identification with very restrictive selection criteria to find new MQs, taking advantage of more sensitive modern X-ray data. To do this, we made combined use of the radio, infrared, and X-ray properties of the sources, using different available catalogs. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 83 86 X-ray properties of NVSS/XMM-Newton cross-correlated sources
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) B/xmm : XMM-Newton Observation Log (XMM-Newton SOC, 2007) VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Seq Sequential number 4- 18 A15 --- Name IAU name (HHMMSS.s+DDMMSS) (1) 20- 21 I2 h RAh Right ascension (J2000) 23- 24 I2 min RAm Right ascension (J2000) 26- 30 F5.2 s RAs Right ascension (J2000) 32 A1 --- DE- Declination sing (J2000) 33- 34 I2 deg DEd Declination sing (J2000) 36- 37 I2 arcmin DEm Declination sing (J2000) 39- 43 F5.2 arcsec DEs Declination sing (J2000) 45- 49 F5.2 --- HRx ?=- Hardness ratio (M-S)/(M+S) (2) 51- 55 F5.2 --- HRy ?=- Hardness ratio (H-S)/(H+S) (2) 57 A1 --- l_NH Limit flag on NH 58- 61 F4.2 10+22cm-2 NH ?=- Hydrogen column density 63- 66 F4.2 --- Gamma ?=- Power law model index 68- 74 F7.2 10-17W/m2 FX X-ray flux in the 0.2-12keV energy band (3) 76- 79 F4.1 10-17W/m2 e_FX rms uncertainty on FX 81- 82 I2 --- ID Identification flag (4) 83 A1 --- n_ID [*+t] Other observations (5)
Note (1): Sources identified as 2XMMp JHHMMSS.s+DDMMSS in Simbad Note (2): Where S is the soft 0.2-1.0keV band, M is the medium 1.0-2.0keV band and H is the hard 2-12.0keV band. Note (3): The X-ray flux computed in the SXSSC using an energy conversion factor (ECF) in the 0.2-12keV energy band (details in XMM report). Note (4): Indentification flag as follows: 1 = unidentified 2 = stars 3 = galaxy 4 = QSOs 5 = pulsar 6 = star forming region 7 = HII regions 8 = giant molecular clouds 9 = Herbig-Haro objects 10 = globular clusters 11 = cluster of galaxies. Note (5): Notes as follows: * = Source with radio detection at wavelength other than 20cm. + = Source with one 2MASS counterpart (Cutri et al., 2003, Cat. II/246, Skrutskie et al., 2006AJ....131.1163S). t = Source with two 2MASS counterpart (Cutri et al., 2003, Cat. II/246, Skrutskie et al., 2006AJ....131.1163S).
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 01-Feb-2008
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