J/A+A/468/353 XMM-Newton Extended Survey of Taurus (Guedel+, 2007)
The XMM-Newton Extended Survey of the Taurus Molecular Cloud.
Guedel M., Briggs K.R., Arzner K., Audard M., Bouvier J., Feigelson E.D.,
Franciosini E., Glauser A., Grosso N., Micela G., Monin J.-L.,
Montmerle T., Padgett D.L., Palla F., Pillitteri I., Rebull L.,
Scelsi L., Silva B., Skinner S.L., Stelzer B., Telleschi A.
<Astron. Astrophys. 468, 353 (2007)>
=2007A&A...468..353G 2007A&A...468..353G
ADC_Keywords: Surveys ; X-ray sources ; Associations, stellar ;
Stars, pre-main sequence
Keywords: stars: formation - stars: pre-main sequence - X-rays: stars -
gravitational waves
Abstract:
The XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST)
surveys the most populated ∼5 square degrees of the Taurus Molecular
Cloud, using the XMM-Newton X-ray observatory to study the thermal
structure, variability, and long-term evolution of hot plasma, to
investigate the magnetic dynamo, and to search for new potential
members of the association. We present overall correlations with
fundamental stellar parameters that were derived from the previous
literature. The present overview paper introduces the project and
provides the basic results from the X-ray analysis of all sources
detected in the XEST survey. Comprehensive tables summarize the
stellar properties of all targets surveyed. The survey goes deeper
than previous X-ray surveys of Taurus by about an order of magnitude
and for the first time systematically accesses very faint and strongly
absorbed TMC objects. We find a detection rate of 85% and 98% for
classical and weak-line T Tauri stars (CTTS resp. WTTS), and identify
about half of the surveyed protostars and brown dwarfs. Overall, 136
out of 169 surveyed stellar systems are detected. We describe an X-ray
luminosity vs. mass correlation, discuss the distribution of
X-ray-to-bolometric luminosity ratios, and show evidence for lower
X-ray luminosities in CTTS compared to WTTS.
Description:
The complete catalog of all X-ray sources (stellar and non-stellar)
detected in the XEST fields is presented. The catalog provides X-ray
coordinates, their uncertainties, X-ray count rates and uncertainties,
and X-ray hardness ratios for 2347 detected X-ray sources. If two XEST
fields overlap, the same sources may have been identified twice, with
different XEST IDs assigned.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table14.dat 220 2347 Coordinates and count rates for 2347 X-ray sources
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See also:
J/A+A/325/647 : High-resolution spectra south of Taurus (Neuhaeuser+ 1997)
J/A+AS/124/449 : Young stars south of Taurus-Auriga (Magazzu+ 1997)
J/ApJS/101/117 : UBVRIJHKLMNQ photometry in Taurus-Auriga (Kenyon+ 1995)
J/A+A/468/379 : XMM Optical Monitor Survey of TMC (Audard+, 2007)
Byte-by-byte Description of file: table14.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq Catalog number
6- 7 I2 --- XEST-fld XEST field number
8 A1 --- --- [-]
9- 11 I3 --- XEST-src XEST source number in field
13- 14 I2 h RAh Right ascension (J2000)
16- 17 I2 min RAm Right ascension (J2000)
19- 23 F5.2 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 35 F4.1 arcsec DEs Declination (J2000)
37- 45 F9.6 deg RAdeg Right ascension in decimal degrees (J2000)
47- 56 F10.6 deg DEdeg Declination in decimal degrees (J2000)
58- 61 F4.2 arcsec ePos Positional Error (1 sigma)
63- 70 F8.1 --- MLF Maximum likelihood in full band (0.5-7.3keV)
72- 77 I6 ct ctF Number of counts in full band (0.5-7.3keV)
79- 84 I6 s ExptF PN-equivalent full band (0.5-7.3keV)
exposure time
86- 91 F6.4 ct/s CRF PN-equivalent full band (0.5-7.3keV)
source count rate
93- 98 F6.4 ct/s e_CRF Error of full band source count rate
100-107 F8.1 --- MLS Maximum likelihood in soft band (0.5-2.0keV)
109-114 I6 ct ctS Number of counts in soft band (0.5-2.0keV)
116-121 I6 s ExptS PN-equivalent soft band (0.5-2.0keV)
exposure time
123-128 F6.4 ct/s CRS PN-equivalent soft band (0.5-2.0keV)
source count rate
130-135 F6.4 ct/s e_CRS Error of soft band source count rate
137-144 F8.1 --- MLH Maximum likelihood in hard band (2.0-7.3keV)
146-151 I6 ct ctH Number of counts in hard band (2.0-7.3keV)
153-158 I6 s ExptH PN-equivalent ard band (2.0-7.3keV)
exposure time
160-165 F6.4 ct/s CRH PN-equivalent hard band (2.0-7.3keV)
source count rate
167-172 F6.4 ct/s e_CRH Error of hard band source count rate
174-179 F6.3 --- HR Hardness (CRH-CRS)/(CRF) (1)
181-186 F6.3 --- HRupp Hardness upper limit (1 sigma)
188-193 F6.3 --- HRlow Hardness lower limit (1 sigma)
195-220 A26 --- Com Comments
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Note (1): If object is not detected in soft (hard) band, then HR is upper
(lower) limit. If object is detected only in full band, then HR = 0.
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Acknowledgements:
Manuel Guedel, guedel(at)astro.phys.ethz.ch
(End) Manuel Guedel [PSI/ETHZ, Switzerland], Patricia Vannier [CDS] 21-May-2007