J/A+A/450/993 XMM survey of NGC 2516 (Pillitteri+, 2006)
Deep X-ray survey of the young open cluster NGC 2516 with XMM-Newton.
Pillitteri I., Micela G., Damiani F., Sciortino S.
<Astron. Astrophys., 450, 993-1004 (2006)>
=2006A&A...450..993P 2006A&A...450..993P
ADC_Keywords: Clusters, open ; X-ray sources
Keywords: X-ray: stars - stars: activity -
open clusters and associations: individual: NGC 2516
Abstract:
We report a deep X-ray survey of the young (∼140Myr), rich open
cluster NGC 2516 obtained with the EPIC camera on board the XMM-Newton
satellite.
By combining data from six observations, a high sensitivity, greater
than a factor of 5 with respect to recent Chandra observations, has
been achieved. Kaplan-Meier estimators of the cumulative X-ray
luminosity distribution are built, statistically corrected for non
members contaminants and compared to those of the nearly coeval
Pleiades. The EPIC spectra of the X-ray brightest stars are fitted
using optically thin model plasma with one or two thermal components.
We detected 431 X-ray sources and 234 of them have as optical
counterparts cluster stars spanning the entire NGC 2516 Main Sequence.
Description:
NGC 2516 has been observed several times with XMM-Newton during the
first two years of satellite operations for calibration purposes.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 62 431 List of detected X-ray sources in the combined
images of the XMM-Newton EPIC camera.
tableb1.dat 71 239 Optical identifications, X-ray fluxes and
luminosities of NGC 2516 X-ray detected stars
tablec1.dat 72 354 X-ray undetected stars of NGC 2516
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See also:
J/A+A/312/818 : NGC 2516 X-ray sources (Dachs+, 1996)
J/A+A/375/863 : Photometry in NGC 2516 (Jeffries+, 2001)
J/AJ/123/290 : UBVI CCD photometry of NGC 2516 (Sung+, 2002)
J/ApJ/588/1009 : Chandra X-ray observations of NGC 2516 (Damiani+, 2003)
J/ApJ/606/466 : X-ray variability in NGC 2516 (Wolk+, 2004)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 ---- [PMD2006] Sequential number of X-ray detection
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 28 F5.2 arcsec DEs Declination (J2000)
30- 34 F5.2 ct/ks CR Count rate in MOS! equivalent counts
36- 39 F4.2 ct/ks e_CR rms uncertainty on CR
41- 46 F6.2 --- Signi Detection significance (in units of background
mean standard deviation)
49- 54 F6.2 ks ExpTime Total exposition time
56- 60 F5.2 arcmin Offaxis Offaxis distance
62 A1 --- Un [U] U: unidentified source
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Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [PMD2006] Sequential number of X-ray detection
5- 9 I5 --- JTH Optical identification number from
Jeffries et al. (2001, J/A+A/375/863)
Cl* NGC 2516 JTH NNNNN in Simbad
11- 13 F3.1 arcsec Dist Match distance
15- 18 F4.1 mag Vmag V magnitude
20- 23 F4.1 mag B-V ?=- B-V colour index
25- 30 F6.2 mag V-I ?=- V-I colour index
32- 36 F5.1 10-18W/m2 FX X-ray flux in the 0.3-7.9keV band
38- 41 F4.1 10-18W/m2 e_FX rms uncertainty on FX
43- 47 F5.2 [10-7W] logLX X-ray luminosity in the 0.3-7.9keV band
49- 53 F5.3 [10-7W] e_logLX Error in logLX (lower limit)
55- 59 F5.3 [10-7W] E_logLX Error in logLX (upper limit)
61- 65 F5.2 [10-7W] logLbol ?=- Bolometric luminosity
67- 71 F5.2 --- logLX/Lbol ?=- Bolometric-to-X-ray luminosity ratio
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Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- JTH Sequential number of optical identification
(Jeffries et al., 2001, J/A+A/375/863)
Cl* NGC 2516 JTH NNNNN in Simbad
7- 12 F6.3 mag Vmag V magnitude
14- 19 F6.3 mag B-V ?=- B-V colour index
21- 26 F6.3 mag V-I ?=- V-I colour index
28- 33 F6.2 ks ExpTime Exposure time
35- 36 A2 --- l_Rate [≤ ] Limit flag on Rate
37- 41 F5.3 ct/ks Rate Upper limit of rate
43- 44 A2 --- l_logFX [≤ ] Limit flag on logFX
45- 50 F6.2 [mW/m2] logFX Upper limit of X-ray flux in 0.3-7.9keV band
52- 53 A2 --- l_logLX [≤ ] Limit flag on logLX
54- 58 F5.2 [10-7W] logLX Upper limit of X-ray luminosity in
0.3-7.9keV band
60- 64 F5.2 [10-7W] logLbol ?=- Bolometric luminosity
66- 67 A2 --- l_logLX/Lbol [≤ ] Limit flag on logLX/Lbol
68- 72 F5.2 --- logLX/Lbol ?=- Upper limit of X-ray-to-bolometric
luminosity ratio
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Dec-2006