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J/A+A/536/A31       Cyg OB2 XMM observations                     (Rauw, 2011)

A multi-epoch XMM-Newton campaign on the core of the massive Cyg OB2 association. Rauw G. <Astron. Astrophys. 536, A31 (2011)> =2011A&A...536A..31R
ADC_Keywords: Clusters, open ; Stars, early-type ; X-ray sources ; Ultraviolet Keywords: open clusters and associations: individual: Cyg OB2 - stars: early-type - stars: pre-main sequence - stars: individual: Cyg OB2 12 - X-rays: stars Abstract: Cyg OB2 is one of the most massive associations of O-type stars in our Galaxy. Despite the large interstellar reddening towards Cyg OB2, many studies, spanning a wide range of wavelengths, have been conducted to more clearly understand this association. X-ray observations provide a powerful tool to overcome the effect of interstellar absorption and study the most energetic processes associated with the stars in Cyg OB2. We analyse XMM-Newton data to investigate the X-ray and UV properties of massive O-type stars as well as low-mass pre-main sequence stars in Cyg OB2. Description: The general properties of the X-ray sources detected in Cyg OB2 with the EPIC cameras onboard XMM-Newton are given in Table 2. In addition, Table 4 provides the properties of the sources detected inside Cyg OB2 with two UV filters of the OM instrument onboard XMM-Newton. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 326 199 Properties of the X-ray sources in Cyg OB2 table4.dat 132 254 Properties of the UV sources in Cyg OB2
See also: J/AJ/101/1408 : Massive stars in Cyg OB2 (Massey+ 1991) J/A+A/464/211 : Chandra and near-IR obs. of Cyg OB2 (Albacete Colombo+, 2007) J/A+A/486/453 : NIR photometry of early-type stars in Cyg OB2 (Comeron+, 2008) J/ApJ/664/1102 : Radial velocity survey of Cyg OB2 association (Kiminki+, 2007) J/ApJS/184/84 : X-ray sources in Cyg OB2 region (Wright+, 2009) J/A+A/495/231 : Multiwavelength study of Cyg OB2 5 (Linder+, 2009) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- IDX [1/199] ID number of X-ray source 5- 6 I2 h RAh Right ascension (J2000) 8- 9 I2 min RAm Right ascension (J2000) 11- 14 F4.1 s RAs Right ascension (J2000) 16 A1 --- DE- Declination sign 17- 18 I2 deg DEd Declination (J2000) 20- 21 I2 arcmin DEm Declination (J2000) 23- 26 F4.1 arcsec DEs Declination (J2000) 28- 37 E10.5 ct/s pnCRS EPIC-pn count rate in soft band 42- 47 F6.4 --- pnPrS Probability that the source be constant in EPIC-pn soft band 49 I1 --- pnNrS Number of observations in EPIC-pn soft band 51- 60 E10.5 ct/s pnCRM EPIC-pn count rate in medium band 65- 70 F6.4 --- pnPrM Probability that the source be constant in EPIC-pn medium band 72 I1 --- pnNrM Number of observations in EPIC-pn medium band 74- 83 E10.5 ct/s pnCRH EPIC-pn count rate in hard band 88- 93 F6.4 --- pnPrH Probability that the source be constant in EPIC-pn hard band 95 I1 --- pnNrH Number of observations in EPIC-pn hard band 97-106 E10.5 ct/s m1CRS EPIC-MOS1 count rate in soft band 111-116 F6.4 --- m1PrS Probability that the source be constant in EPIC-MOS1 soft band 118 I1 --- m1NrS Number of observations in EPIC-MOS1 soft band 120-129 E10.5 ct/s m1CRM EPIC-MOS1 count rate in medium band 134-139 F6.4 --- m1PrM Probability that the source be constant in EPIC-MOS1 medium band 141 I1 --- m1NrM Number of observations in EPIC-MOS1 medium band 143-152 E10.5 ct/s m1CRH EPIC-MOS1 count rate in hard band 157-162 F6.4 --- m1PrH Probability that the source be constant in EPIC-MOS1 hard band 164 I1 --- m1NrH Number of observations in EPIC-MOS1 hard band 166-175 E10.5 ct/s m2CRS EPIC-MOS2 count rate in soft band 180-185 F6.4 --- m2PrS Probability that the source be constant in EPIC-MOS2 soft band 187 I1 --- m2NrS Number of observations in EPIC-MOS2 soft band 189-198 E10.5 ct/s m2CRM EPIC-MOS2 count rate in medium band 203-208 F6.4 --- m2PrM Probability that the source be constant in EPIC-MOS2 medium band 210 I1 --- m2NrM Number of observations in EPIC-MOS2 medium band 212-221 E10.5 ct/s m2CRH EPIC-MOS2 count rate in hard band 226-231 F6.4 --- m2PrH Probability that the source be constant in EPIC-MOS2 hard band 233 I1 --- m2NrH Number of observations in EPIC-MOS2 hard band 235-240 F6.3 mag UVM2 ? Mean XMM-OT/UVM2 AB-magnitude of counterpart 242-247 F6.3 mag UVW1 ? Mean XMM-OT/UVW1 AB-magnitude of counterpart 249-251 I3 --- IDOM ? ID number of OM counterpart 253-258 F6.3 mag Jmag ? J magnitude of 2MASS counterpart 260-265 F6.3 mag Hmag ? H magnitude of 2MASS counterpart 267-272 F6.3 mag Ksmag ? Ks magnitude of 2MASS counterpart 274-276 A3 --- q2M Quality of the 2MASS counterpart (1) 278-282 F5.2 mag Vmag ? V magnitude of optical counterpart from Massey & Thompson (1991, Cat. J/AJ/101/1408) 284-288 F5.2 mag U-B ? U-B colour of optical counterpart from Massey & Thompson (1991, Cat. J/AJ/101/1408) 291-294 F4.2 mag B-V ? B-V colour of optical counterpart from Massey & Thompson (1991, Cat. J/AJ/101/1408) 296-326 A31 --- Com Comments on spectral type and commonly used designation of the source
Note (1): For single 2MASS counterparts, the flag contains the 2MASS quality flag; otherwise: ncp = no 2MASS counterpart in the 4 arcsec correlation radius 2cp = two 2MASS counterparts in the 4 arcsec correlation radius 3cp = three 2MASS counterparts in the 4 arcsec correlation radius
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 I3 --- IDOM [1/254] ID number of the OM source 5- 14 F10.6 deg RAdeg Right ascension (J2000) 16- 24 F9.6 deg DEdeg Declination (J2000) 27- 32 F6.3 mag UVM2 ? Mean XMM-OT/UVM2 (232nm) AB-magnitude 34- 40 F7.5 --- prM2 ? Probability that the source be constant in UVM2 filter 43- 48 F6.3 mag UVW1 ? Mean XMM-OT/UVW1 (299nm) AB-magnitude 50- 56 F7.5 --- prW1 ? Probability that the source be constant in UVW1 filter 58- 61 F4.2 arcsec rc1 ? Angular distance from likely optical counterpart 63- 65 I3 --- MT91 ? ID number of the optical counterpart in Massey & Thompson (1991, Cat. J/AJ/101/1408) 67- 71 F5.2 mag Vmag ? V magnitude of optical counterpart from Massey & Thompson (1991, Cat. J/AJ/101/1408) 73- 76 F4.2 mag U-B ? U-B colour of optical counterpart from Massey & Thompson (1991, Cat. J/AJ/101/1408) 78- 81 F4.2 mag B-V ? B-V colour of optical counterpart from 83- 86 F4.2 arcsec rc2 ? Angular distance from likely 2MASS counterpart 88- 93 F6.3 mag Jmag ? J magnitude of 2MASS counterpart 95-100 F6.3 mag Hmag ? H magnitude of 2MASS counterpart 102-107 F6.3 mag Ksmag ? Ks magnitude of 2MASS counterpart 109-132 A24 --- Com Comments on spectral type and commonly used designation of the source
Acknowledgements: Gregor Rauw, rauw(at)astro.ulg.ac.be
(End) Gregor Rauw [IAGL, Belgium], Patricia Vannier [CDS] 13-Oct-2011
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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