J/ApJS/134/77 ASCA Galactic Plane Survey faint X-ray sources (Sugizak+, 2001)
Faint X-ray sources resolved in the ASCA galactic plane survey and their contribution to the galactic ridge X-ray emission. Sugizaki M., Mitsuda K., Kaneda H., Matsuzaki K., Yamauchi S., Koyama K. <Astrophys. J. Suppl. Ser. 134, 77 (2001)> =2001ApJS..134...77S
ADC_Keywords: Galactic plane ; X-ray sources Mission_Name: ASCA Keywords: Galaxy: general - X-rays: general Abstract: The X-ray emission from the central region of the Galactic plane, |l|≲45° and |b|≲0.4°, was studied in the 0.710keV energy band with a spatial resolution of ∼3' with the Advanced Satellite for Cosmology and Astrophysics (ASCA) observatory. We developed a new analysis method for the ASCA data to resolve discrete sources from the extended Galactic ridge X-ray emission (GRXE). We successfully resolved 163 discrete sources with an X-ray flux down to 10-12.5ergs/cm2/s and determined the intensity variations of the GRXE as a function of the Galactic longitude with a spatial resolution of about 1°. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 200 163 Source List of the ASCA Galactic Plane Survey table5.dat 148 10 Summary of 10 Relatively Bright X-Ray Sources with F>10-11ergs/cm2/s in the Resolved Sources
See also: J/ApJ/518/656 : ASCA Large Sky Survey (Ueda+, 1999) IX/13 : The 2E Catalogue (Harris+ 1994) IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999) VII/211 : A Catalogue of Galactic Supernova Remnants (Green 1998) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1 A1 --- n_AXJ [*] Note on ASCA name (1) 2- 16 A15 --- AXJ ASCA Name 18- 24 F7.3 deg GLON [-90/90] Galactic longitude 26- 31 F6.3 deg GLAT Galactic latitude 33- 39 F7.3 deg RAdeg Right ascension (J2000) (2) 41- 47 F7.3 deg DEdeg Declination (J2000) (2) 49- 54 F6.1 ct/ks F1 ? Flux at 0.7-2keV, in ct/ks/GIS (3) 55 A1 --- --- [/] 56- 60 F5.1 --- e_F1 ? Detection significance of F1, see Eq.6 62- 67 F6.1 ct/ks F3 ? Flux at 0.7-7keV, in ct/ks/GIS (3) 68 A1 --- --- [/] 69- 73 F5.1 --- e_F3 ? Detection significance of F3, see Eq.6 75- 80 F6.1 ct/ks F2 ? Flux at 2-10keV, in ct/ks/GIS (3) 81 A1 --- --- [/] 82- 85 F4.1 --- e_F2 ? Detection significance of F2, see Eq.6 87- 91 F5.2 10-15W/m2 Flux ? Flux in 0.7-10 keV (PL parameter) (4) 93- 97 F5.2 --- Gamma ? Photon-law index (PL parameter) (4) 99-102 F4.2 --- e_Gamma ? Error in Gamma (lower limit) 104-107 F4.2 --- E_Gamma ? Error in Gamma (upper limit) 109-113 F5.2 10+22cm-2 NH ? Absorption hydrogen column density 115-119 F5.2 10+22cm-2 e_NH ? Error in NH (lower limit) 121-125 F5.2 10+22cm-2 E_NH ? Error in NH (upper limit) 127-131 F5.2 --- ChiNu2 ? Reduced χν2 for 10 degrees of freedom (not χν as stated in the paper) 133-200 A68 --- Id Identification (5)
Note (1): The asterisk on a source name denotes reduced accuracy because the source location is near the edge of the field of view. Note (2): Uncertainty of the position coordinates is ∼1.0'=0.016° Ueda et al., 1999, Cat. J/ApJ/518/656 Note (3): Flux obtained from image fitting analysis are shown in counts/ks/GIS (countrate for a single GIS detector -- ASCA has two GISs), a count rate observed at the GIS nominal position, for each energy band. Blanks mean no source candidates in the energy band. Note (4): Best-fit parameters of a power-law model, photon index Gamma, absorption column density NH (1022cm-2), flux (10-12ergs/cm2/s) in 0.7-10keV and reduced Χ.Χν for 10 degrees of freedom, are shown for the sources with the significance above 5σ. All errors represent 90% confidence limits. Blanks in the errors mean that the best-fit power-law model is unacceptable within a 97% confidence limit (Χν<2). Note (5): Identified catalog sources within the position determination accuracy of 1' in the Einstein IPC X-ray Source Catalog (2E, Cat. IX/13), the ROSAT All-Sky Survey Bright Source Catalog (1RXS, Cat. IX/10), the Green Galactic SNR Catalogue (G, Cat. VII/211), and catalogues of optical stars in SIMBAD database (SIM).
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 15 A15 --- AXJ ASCA name 17- 21 F5.2 --- Gamma Photon index (1) 23- 26 F4.2 --- E_Gamma ? Error in Gamma (upper limit) 28- 31 F4.2 --- e_Gamma ? Error in Gamma (lower limit) 33- 37 F5.2 10+22cm-2 NH Absorption column density 39- 42 F4.2 10+22cm-2 E_NH ? Error in NH (upper limit) 44- 47 F4.2 10+22cm-2 e_NH ? Error in NH (lower limit) 49- 52 F4.1 10-15W/m2 Flux Flux in he 0.7-10keV band 54 A1 --- f_Flux [O] Flux variability with a confidence above 99% 56-148 A93 --- Id Identification and References
Note (1): Best-fit values of power-law model, extracted from table2.dat
History: From electronic version of the journal * 18-Dec-2001: thanks to checks by Stephen A. Drake (), explanations of the flux parameters were corrected, as well as errors on Gamma and NH, and error in the definition of the ChiNu2 parameter.
(End) Patricia Bauer [CDS] 08-Jun-2001
|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|