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J/ApJ/607/904       Chandra obs. of Trifid nebula            (Rho+, 2004)

Chandra observation of the Trifid nebula: X-ray emission from the O star complex and actively forming pre-main-sequence stars. Rho J., Ramirez S.V., Corcoran M.F., Hamaguchi K., Lefloch B. <Astrophys. J., 607, 904-912 (2004)> =2004ApJ...607..904R
ADC_Keywords: H II regions ; Stars, pre-main sequence ; X-ray sources Keywords: ISM: individual (Trifid Nebula) - stars: activity - stars: pre-main-sequence - X-rays: stars Abstract: The Trifid Nebula, a young star-forming H II region, was observed for 16hr by the ACIS-I detector on board the Chandra X-Ray Observatory. We detected 304 X-ray sources, 30% of which are hard sources and 70% of which have near-infrared counterparts. Description: The Trifid Nebula was observed with the Advanced CCD Imaging Spectrometer (ACIS) detector on board Chandra on 2002 June 13. The results presented here arise from the imaging array (ACIS-I). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 54 304 Catalog of X-ray sources
See also: B/chandra : The Chandra Archive Log (CXC, 2002-) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [RRC2004] X-ray source identification number 5- 7 I3 --- WID Wavelet analysis identification number 9- 10 I2 h RAh Hour of Right Ascension (J2000) 12- 13 I2 min RAm Minute of Right Ascension (J2000) 15- 19 F5.2 s RAs Second of Right Ascension (J2000) 21 A1 --- DE- Sign of the Declination (J2000) 22- 23 I2 deg DEd Degree of Declination (J2000) 25- 26 I2 arcmin DEm Arcminute of Declination (J2000) 28- 31 F4.1 arcsec DEs Arcsecond of Declination (J2000) 33- 35 I3 ct/ks Counts Net counts from wavelength analysis 37- 38 I2 ct/ks e_Counts Uncertainty in Counts 40- 42 I3 --- S/N Signal-to-noise ratio from wavelength analysis 44- 48 F5.2 --- HR Hardness ratio (1) 50- 53 F4.2 --- e_HR Uncertainty in HR
Note (1): HR = (H-S)/(H+S) where H and S is the count rate for hard (2-8keV) and soft (0.5-2keV) bands, respectively.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 29-Apr-2005
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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