J/MNRAS/371/38 X-ray observations of the Galaxy center (Wang+, 2006)
The interplay between star formation and the nuclear environment of our Galaxy:
deep X-ray observations of the Galactic centre Arches and Quintuplet clusters.
Wang Q.D., Dong H., Lang C.
<Mon. Not. R. Astron. Soc., 371, 38-54 (2006)>
=2006MNRAS.371...38W 2006MNRAS.371...38W
ADC_Keywords: Molecular clouds ; X-ray sources
Keywords: stars: formation - stars: winds, outflows - stars: WolfRayet -
ISM: clouds - Galaxy: centre - X-rays: ISM
Abstract:
The Galactic centre (GC) provides a unique laboratory for a detailed
examination of the interplay between massive star formation and the
nuclear environment of our Galaxy. Here, we present a 100-ks Chandra
Advanced CCD Imaging Spectrometer (ACIS) observation of the Arches and
Quintuplet star clusters. We also report on a complementary mapping of
the dense molecular gas near the Arches cluster made with the Owens
Valley Millimeter Array. We present a catalogue of 244 point-like
X-ray sources detected in the observation.
Description:
Our deep Chandra ACIS-I observation (Obs. ID: 4500) was carried out on
2004 June 9. The Arches cluster was placed about 1-arcmin away from
the aim point to minimize the effect of the CCD gaps on mapping the
extended X-ray emission around the cluster.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 72 244 Chandra Source List
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See also:
J/MNRAS/371/147 : XMM-Newton observation of NGC 2613 (Li+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [WDL2006] Source sequential number
4 A1 --- n_[WDL2006] [*] Marginal detection [WDL2006] (1)
6- 24 A19 --- CXOU CXOU Name (JHHMMSS.ss+DDMMSS.s)
26- 28 F3.1 arcsec e_Pos Position uncertainty (2)
30- 36 F7.2 ct/ks CR On-axis source broad-band count rate (3)
38- 41 F4.2 ct/ks e_CR rms uncertainty on CR
43- 47 F5.2 --- HR ?=- Hardness ratio, HR=(H-S2)/(H+S2) (4)
49- 52 F4.2 --- e_HR ?=- rms uncertainty on HR
55- 59 F5.2 --- HR2 ?=- Hardness ratio, HR2= (H2-H1)/H (4)
61- 64 F4.2 --- e_HR2 ?=- rms uncertainty on HR2
66- 72 A7 --- Flag [BHS, ] Detection band flags (5)
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Note (1): Sources detected with a probability of false detection
between 10-7 and 10-5 and are in the vicinity of the
Arches and Quintuplet clusters are marked with a *.
Note (2): Position uncertainty (1sigma) calculated from the maximum
likelihood centroiding and an approximate off-axis angle (r) dependent
systematic error 0.2"+1.4"(r/8')2, which are added in quadrature.
Note (3): The sum of the exposure-corrected count rates in the four bands.
Note (4): Listed only for values with uncertainties less than 0.2.
Definition of the bands: 1-2.5 (S1), 2.5-4 (S2), 4-6 (H1) and
6-9keV (H2). In addition, S=S1+S2, H=H1+H2 and B=S+H.
Note (5): The label 'B', 'S' or 'H' mark the band in which a source is detected.
The band which generates the most accurate X-ray centroid position
is listed first.
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Acknowledgements:
Daniel Wang, wqd(at)astro.umass.edu
(End) Patricia Vannier [CDS] 15-May-2007