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J/A+A/602/A115      X-ray survey of NGC7000/IC5070              (Damiani+, 2017)

X-ray survey of the North-America and Pelican star-forming complex (NGC7000/IC5070). Damiani F., Pillitteri I., Prisinzano L. <Astron. Astrophys. 602, A115 (2017)> =2017A&A...602A.115D (SIMBAD/NED BibCode)
ADC_Keywords: H II regions ; Infrared sources ; Interstellar medium ; Nebulae ; Photometry ; Stars, pre-main sequence ; X-ray sources Keywords: stars: pre-main-sequence - X-ray: stars - ISM : individual objects: NGC 7000 Abstract: We present the first extensive X-ray study of the North-America and Pelican star-forming region (NGC7000/IC5070), with the aim of finding and characterizing the young population of this cloud. X-ray data from Chandra (four pointings) and XMM-Newton (seven pointings) were reduced and source detection algorithm applied to each image. We complement the X-ray data with optical and near-IR data from the IPHAS, UKIDSS, and 2MASS catalogs, and with other published optical and Spitzer IR data. More than 700 X-ray sources are detected, the majority of which have an optical or NIR counterpart. This allowed us to identify young stars in different stages of formation. Less than 30% of X-ray sources are identified with a previously known young star. We argue that most X-ray sources with an optical or NIR counterpart, except perhaps for a few tens at near-zero reddening, are likely candidate members of the star-forming region, on the basis of both their optical and NIR magnitudes and colors, and of X-ray properties such as spectrum hardness or flux variations. They are characterized by a wide range of extinction, and sometimes near-IR excesses, both of which prevent derivation of accurate stellar parameters. The optical color-magnitude diagram suggests ages between 1-10Myrs. The X-ray members have a very complex spatial distribution with some degree of subclustering, qualitatively similar to that of previously known members. The detailed distribution of X-ray sources relative to the objects with IR excesses identified with Spitzer is sometimes suggestive of sequential star formation, especially near the 'Gulf of Mexico' region, probably triggered by the O5 star which illuminates the whole region. We confirm that around the O5 star no enhancement in the young star density is found, in agreement with previous results. Thanks to the precision and depth of the IPHAS and UKIDSS data used, we also determine the local optical-IR reddening law, and compute an updated reddening map of the entire region. Description: We present a catalog of X-ray sources, with their optical and near-IR identifications, in the NGC7000/IC5070 (North America/Pelican) star formation complex. Using UKIDSS and IPHAS photometry, we also report additional pre-main-sequence members of the complex showing NIR excesses or H-alpha emission. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 107 721 X-ray source properties table4.dat 46 721 X-ray source identifications table5.dat 65 273 NIR-excess and Halpha-emission stars
See also: IX/50 : XMM-Newton Serendipitous Source Cat. 3XMM-DR6 (XMM-SSC, 2016) J/ApJS/193/25 : The NAN complex. II. MIPS observations (Rebull+, 2011) J/ApJS/224/40 : Catalog of Chandra ACIS point like sources (Wang+, 2016) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- X-rayId [1/721] Unique X-ray source ID 5- 20 A16 --- CXOId IAU designation of Chandra X-ray detections (JHHMMSS.s+DDMMSS) 22- 37 A16 --- XMMId IAU designation of XMM X-ray detections (JHHMMSS.s+DDMMSS) 39- 47 F9.5 deg RAdeg Right ascension (J2000) 49- 56 F8.5 deg DEdeg Declination (J2000) 58- 61 F4.2 arcsec e_pos Position error of X-ray source 63- 70 F8.3 ct/ks CRate X-ray count-rate 72- 77 F6.3 ct/ks e_CRate Error on CRate 79- 83 F5.2 --- ACIS-HR1 ? Hardness ratio 1 for Chandra ACIS sources 85- 89 F5.2 --- ACIS-HR2 ? Hardness ratio 2 for Chandra ACIS sources 91- 95 F5.2 --- XMM-HR1 ? Hardness ratio 1 for XMM EPIC sources 97-101 F5.2 --- XMM-HR2 ? Hardness ratio 2 for XMM EPIC sources 103-107 F5.2 [10-7W] logLX ? log of X-ray luminosity
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 I3 --- X-rayId [1/721] Unique X-ray source ID 5- 9 F5.2 mag imag ? Magnitude in i band from IPHAS 11- 14 F4.2 mag r-i ? Color index r-i from IPHAS 16- 19 F4.2 mag r-Ha ? Color index r-Halpha from IPHAS 21- 25 F5.2 mag Jmag ? Magnitude in J band from UKIDSS/2MASS 27- 31 F5.2 mag Hmag ? Magnitude in H band from UKIDSS/2MASS 33- 37 F5.2 mag Kmag ? Magnitude in K band from UKIDSS/2MASS 39 A1 --- IR-excess [Y] Star with NIR excess 41 A1 --- Ha-emiss [Y] Star with Halpha emission 43- 46 I4 --- [RGS2011] ? Sequential number in Rebull et al. (2011, Cat. J/ApJS/193/25)
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [722/994] Unique X-ray undetected member ID 5- 13 F9.5 deg RAdeg Right ascension (J2000) 15- 22 F8.5 deg DEdeg Declination (J2000) 24- 28 F5.2 mag imag ? Magnitude in i band from IPHAS 30- 33 F4.2 mag r-i ? Color index r-i from IPHAS 35- 38 F4.2 mag r-Ha ? Color index r-Halpha from IPHAS 40- 44 F5.2 mag Jmag ? Magnitude in J band from UKIDSS/2MASS 46- 50 F5.2 mag Hmag ? Magnitude in H band from UKIDSS/2MASS 52- 56 F5.2 mag Kmag ? Magnitude in K band from UKIDSS/2MASS 58 A1 --- IR-excess [Y] Star with NIR excess 60 A1 --- Ha-emiss [Y] Star with Halpha emission 62- 65 I4 --- [RGS2011] ? Sequential number in Rebull et al. (2011, Cat. J/ApJS/193/25)
Acknowledgements: Francesco Damiani, damiani(at)astropa.inaf.it
(End) Francesco Damiani [INAF-OAPA, Italy], Patricia Vannier [CDS] 10-Apr-2017
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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