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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 54 304 Catalog of X-ray sources
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See also:
B/chandra : The Chandra Archive Log (CXC, 2002-)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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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
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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.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 29-Apr-2005