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J/A+A/430/941       Star formation region NGC 6530           (Prisinzano+, 2005)

The star formation region NGC 6530: Distance, ages and initial mass function. Prisinzano L., Damiani F., Micela G., Sciortino S. <Astron. Astrophys., 430, 941-957 (2005)> =2005A&A...430..941P
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Stars, pre-main sequence ; X-ray sources Keywords: Galaxy: open clusters and association: individual: NGC 6530 - techniques: photometric - astrometry - stars: pre-main sequence stars - stars: Hertzprung-Russel (HR) and C-M diagrams Abstract: We present astrometry and BVI photometry, down to V∼22, of the very young open cluster NGC 6530, obtained from observations taken with the Wide Field Imager camera at the MPG/ESO 2.2m Telescope. We have positionally matched our optical catalog with the list of X-ray sources found in a Chandra-ACIS observation, finding a total of 828 common stars, 90% of which are pre-main sequence stars in NGC 6530. Description: The data used in this work come from the combination of optical BVI images taken with the Wide Field Imager (WFI) camera at the 2.2m Telescope of the European Southern Observatory (ESO) made on 27-28 Jul 2000, a 60ks Chandra ACIS X-ray observation and public near-infrared data from the All-Sky Catalog of Point Sources of the Two Micron All Sky Survey (2MASS, Cat. II/24) File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 161 797 Cross-identifications of this catalog with the previous works of Walker (1957ApJ...125..636W), Kilambi (1977MNRAS.178..423K) and Sung et al. (2000, Cat. J/AJ/120/333) table5.dat 81 826 Cross-identifications of the optical catalog with the X-ray source catalog of Damiani et al. (2004ApJ...608..781D)
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [WFI] Optical Catalog 5- 9 I5 --- ID WFI Identification number 11- 12 I2 h RAh Right Ascension (hours) (J2000.0) 14- 15 I2 min RAm Right Ascension (minutes) (J2000.0) 17- 21 F5.2 s RAs Right Ascension (seconds) (J2000.0) 23 A1 --- DE- Declination (sign) (J2000.0) 24- 25 I2 deg DEd Declination (degrees) (J2000.0) 27- 28 I2 arcmin DEm Declination (arcminutes) (J2000.0) 30- 34 F5.2 arcsec DEs Declination (arcseconds) (J2000.0) 36- 41 F6.3 mag Bmag ?=99.999 B magnitude 43- 47 F5.3 mag e_Bmag Error on B magnitude 49- 54 F6.3 mag Vmag V magnitude 56- 60 F5.3 mag e_Vmag Error on V magnitude 62- 67 F6.3 mag Icmag Cousins I magnitude 69- 73 F5.3 mag e_Icmag Error on Ic magnitude 75- 77 I3 -- SCB ?=999 Sung et al. (2000, Cat. J/AJ/120/333) id. number, Cl* NGC 6530 SCB NNNN in Simbad 79- 87 F9.5 arcsec DRA1 ?=999.00000 Ascension Right residuals with respect the Sung et al. (2000) catalog 89- 97 F9.5 arcsec DDE1 ?=999.00000 Declination residuals with respect the Sung et al. (2000) catalog 99-105 F7.3 mag DVmag1 ?=999.000 Vmag residuals with respect to the Sung et al. (2000) catalog 107-113 F7.3 mag D(B-V)1 ?=999.000 B-V residuals with respect to the Sung et al. (2000) catalog 115-121 F7.3 mag D(V-I)1 ?=999.000 V-I residuals with respect to the Sung et al. (2000) catalog 123-125 I3 -- NGC6530 ?=999 Walker-Kilambi (1957ApJ...125..636W & 1977MNRAS.178..423K, NGC 6530 NNN in Simbad) id. number 127-135 F9.5 arcsec DRA2 ?=999.00000 Ascension Right residuals with respect the Walker-Kilambi catalog 137-145 F9.5 arcsec DDE2 ?=999.00000 Declination residuals with respect to the Walker-Kilambi catalog 147-153 F7.3 mag DVmag2 ?=999.000 Vmag residuals with respect to the Walker-Kilambi catalog 155-161 F7.3 mag D(B-V)2 ?=999.000 B-V residuals with respect to the Walker-Kilambi catalog
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Right Ascension (hours) (J2000.0) 4- 5 I2 min RAm Right Ascension (minutes) (J2000.0) 7- 11 F5.2 s RAs Right Ascension (seconds) (J2000.0) 13 A1 --- DE- Declination (sign) (J2000.0) 14- 15 I2 deg DEd Declination (degrees) (J2000.0) 17- 18 I2 arcmin DEm Declination (arcminutes) (J2000.0) 20- 24 F5.2 arcsec DEs Declination (arcseconds) (J2000.0) 27- 29 A3 -- Cat Optical Catalog (WFI or SCB) (1) 31- 35 I5 -- ID Identification number 38- 43 F6.3 mag Bmag ?=99.999 B magnitude 45- 49 F5.3 mag e_Bmag Error on B magnitude 51- 56 F6.3 mag Vmag V magnitude 58- 62 F5.3 mag e_Vmag Error on V magnitude 64- 69 F6.3 mag Imag I magnitude 71- 75 F5.3 mag e_Imag Error on I magnitude 77- 79 I3 -- [DFM2004] Identification number in the Damiani et al. (2004ApJ...608..781D) catalog 81 I1 -- Nopt Number of optical sources corresponding to each X-ray detection
Note (1): Nomenclature note: SCB NNN = Cl* NGC 6530 SCB NNN in Simbad (Sung et al., J/AJ/120/333) WFI : Wide Field Imager
Acknowledgements: Loredana Prisinzano, loredana(at)astropa.unipa.it History: * 21-Feb-2005: Original version * 02-Mar-2005: Columns Bmag and Vmag were interchanged in the description.
(End) Patricia Vannier [CDS] 21-Feb-2005
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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