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J/ApJ/549/441       Chandra observations of Orion Trapezium  (Schulz+, 2001)

Chandra observations of variable embedded X-ray sources in Orion. I. Resolving the Orion Trapezium. Schulz N.S., Canizares C., Huenemoerder D., Kastner J.H., Taylor S.C., Bergstroem E.J. <Astrophys. J. 549, 441 (2001)> =2001ApJ...549..441S
ADC_Keywords: Clusters, open ; X-ray sources ; Cross identifications Mission_Name: Chandra Keywords: open clusters and associations: individual (Trapezium) - stars: early-type - stars: formation - techniques: spectroscopic - X-rays: stars Abstract: We used the High-Energy Transmission Grating Spectrometer on board the Chandra X-Ray Observatory to perform two observations, separated by 3 weeks, of the Orion Trapezium region. The zeroth-order images on the Advanced CCD Imaging Spectrometer provide spatial resolution of 0.5" and moderate energy resolution. Within a 160"x140" region around the Orion Trapezium, we resolve 111 X-ray sources with luminosities between 7x1028 and 2x1032ergs/s. We do not detect any diffuse emission. All but six sources are identified. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 94 111 Source positions, count rates and identifications
See also: J/AJ/117/1375 : Orion Trapezium cluster (Simon+, 1999) J/A+A/299/39 : Orion Trapezium area ROSAT PSPC obs. I. (Geier+, 1995) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 A3 --- [SCH2001] Source designation 5- 6 I2 h RAh Right ascension (J2000.0) 8- 9 I2 min RAm Right ascension (J2000.0) 11- 15 F5.2 s RAs Right ascension (J2000.0) 17 A1 --- DE- Declination sign (J2000.0) 18- 19 I2 deg DEd Declination sign (J2000.0) 21- 22 I2 arcmin DEm Declination sign (J2000.0) 24- 28 F5.2 arcsec DEs Declination sign (J2000.0) 30- 34 I5 ct TotalCount Total counts (1999 October plus November) 36- 41 F6.2 10-3ct/s CR10 ? October count rate 43- 48 F6.2 10-3ct/s CR11 ? November count rate 50- 94 A45 --- Names Identification
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 28-May-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

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