J/AJ/134/999 X-ray observations of NGC 2264 (Dahm+, 2007)
X-ray observations of the young cluster NGC 2264.
Dahm S.E., Simon T., Proszkow E.M., Patten B.M.
<Astron. J., 134, 999-1018 (2007)>
=2007AJ....134..999D 2007AJ....134..999D
ADC_Keywords: Clusters, open ; X-ray sources ; Photometry, infrared
Keywords: open clusters and associations: individual (NGC 2264) -
stars: chromospheres - stars: coronae - stars: pre-main sequence -
stars: rotation - X-rays: stars
Abstract:
We present results from an X-ray imaging survey of the young cluster
NGC 2264, carried out with the European Photon Imaging Cameras (EPIC)
on board the XMM-Newton spacecraft. The X-ray data are merged with
extant optical and near-infrared photometry, spectral classifications,
Halpha emission strengths, and rotation periods to examine the
interrelationships between coronal and chromospheric activity,
rotation, stellar mass, and internal structure for a statistically
significant sample of pre-main-sequence stars. A total of 300 distinct
X-ray sources can be identified with optical or near-infrared
counterparts. The sources are concentrated within three regions of the
cluster: in the vicinity of S Mon, within the large
emission/reflection nebulosity southwest of S Mon, and along the broad
ridge of molecular gas that extends from the Cone Nebula to the NGC
2264 IRS 2 field.
Description:
XMM-Newton EPIC observations were made separately of the northern and
southern portions of NGC 2264 on 2001 March 20 and 2002 March 17-18,
respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 139 300 X-ray source detections in NGC 2264
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See also:
J/AJ/114/2644 : UBVRIHa photometry of NGC2264 (Sung+, 1997)
J/A+A/345/521 : BVRI photometry of NGC 2264 (Flaccomio+, 1999)
J/AJ/123/1528 : UBV(RI)C and JHK photometry in NGC 2264 (Rebull+, 2002)
J/AJ/127/1117 : Halpha emission-line stars in NGC2264 (Reipurth+, 2004)
J/AJ/127/2228 : VRI photometry of PMS stars in NGC 2264 OB (Makidon+, 2004)
J/A+A/417/557 : Rotation + variability of PMS Stars in NGC 2264 (Lamm, 2004)
J/AJ/129/829 : Hα emission stars in NGC 2264 (Dahm+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- UHX UHX running number ([DSP2007] NNN in Simbad)
5 A1 --- n_UHX [l] Binarity (1)
7- 22 A16 --- Name Source name (JHHMMSS.s+DDMMSS)
24- 50 A27 --- ID Source Identifier (2)
52- 58 F7.2 ct/ks CRate EPIC count rate
60- 62 F3.1 ct/ks e_CRate Uncertainty in CRate
64 A1 --- n_CRate [m] count rate from MOS (3)
66- 67 I2 % EEF Throughput of the extraction aperture (4)
69- 72 F4.1 ks EExp Effective exposure time (5)
74- 77 F4.2 mag AV V band extinction (6)
79- 83 F5.2 [10-7W] logLX Log of foreground extinction corrected
X-ray luminosity
85- 88 F4.2 [10-7W] e_logLX Uncertainty in logLX
90- 94 F5.2 mag Vmag ? Johnson V band magnitude (7)
96- 99 F4.2 mag V-Rc ? Johnson-Cousins V-Rc color index
101-105 F5.2 mag V-Ic ? Johnson-Cousins V-Ic color index
107-111 F5.2 mag Jmag ? 2MASS J band magnitude
113-117 F5.2 mag J-H ? 2MASS (J-H) color index
119-123 F5.2 mag H-Ks ? 2MASS (H-KS) color index
125-129 F5.1 0.1nm EWHa ? Paper 1 Hα equivalent width
in units of Angstroms
131-134 F4.2 [yr] logA ? Log of the Age (8)
136-139 F4.2 solMass Mass ? Stellar mass (8)
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Note (1): Flag l for adaptive optics binary:
UHX 10 = Sep=0.32", PA=41.3°
UHX 68 = Sep=1.21", PA=325.2°
UHX 92 = Sep=1.33", PA=148.0°
UHX 102 = Sep=0.27", PA=184.6°
UHX 135 = Sep=1.74", PA=91.3°
UHX 148 = Sep=0.20", PA=211.1°
UHX 169 = Sep=1.98", PA=163.7°
UHX 170 = Sep=1.11", PA=180.6°
UHX 201 = Sep=2.13", PA=133.4°
UHX 228 = Sep=2.34", PA=301.3°
UHX 231 = Sep=0.89", PA=63.6°
UHX 261 = Sep=0.17", PA=32.1°
Note (2): Name are from:
W = Walker (1956ApJS....2..365W 1956ApJS....2..365W); NGC 2264 NNN in Simbad
LHα = Herbig (1954ApJ...119..483H 1954ApJ...119..483H); Em* LkHA NN in Simbad
VSB = Vasilevskis et al. (1965AJ.....70..797V 1965AJ.....70..797V);
Cl* NGC 2264 Vas NNN in Simbad
FMS = Flaccomio et al. (1999, Cat. J/A+A/345/521);
Cl* NGC 2264 FMS NNN in Simbad
SBL = Sung et al. (1997, Cat. J/AJ/114/2644);
Cl* NGC 2264 SBL NNNN in Simbad
PSB = Park et al. (2000AJ....120..894P 2000AJ....120..894P);
Cl* NGC 2264 PSB NNN in Simbad
LBM = Lamm et al. (2004, cat. J/A+A/417/557);
Cl* NGC 2264 LBM NNNNN in Simbad
UPa = Koch & Perry (1974AJ.....79..379K 1974AJ.....79..379K); NGC 2264 NNN in Simbad
ESOHα = Reipurth et al. (2004, Cat. J/AJ/127/1117); ESO-HA NNN
KHα = Ogura (1984PASJ...36..139O 1984PASJ...36..139O); KHA NNN in Simbad
RMS = Rebull et al. (2002, Cat. J/AJ/123/1528);
Cl* NGC 2264 RMS NNNN in Simbad
UHα = Paper I, Dahm & Simon 2005, Cat. J/AJ/129/829);
Cl* NGC 2264 DS NNN in Simbad
Note (3): 'm' indicates that the EPIC pn camera count rate is not
available, MOS camera count rate is shown
Note (4): i.e., the encircled energy fraction of the measurement cell.
Note (5): From the EPIC exposure maps.
Note (6): Derived from color-excess assuming normal ratio of
total-to-selective absorption.
Note (7): From Paper I or the literature. See referenced papers in the text.
Note (8): Derived using the models of Siess et al. (2000A&A...358..593S 2000A&A...358..593S).
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History:
From electronic version of the journal
References:
Dahm & Simon, Paper I 2005AJ....129..829D 2005AJ....129..829D, Cat. J/AJ/129/829
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 03-Oct-2009