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J/A+A/493/959       UBV(RI)cHalpha photometry in omega Cen      (Bellini+, 2009)

Ground-based CCD astrometry with wide field imagers. III. proper-motion catalog of the globular cluster omega Centauri. Bellini A., Piotto G., Bedin L.R., Anderson J., Platais I., Momany Y., Moretti A., Milone A.P., Ortolani S. <Astron. Astrophys. 493, 959 (2009)> =2009A&A...493..959B
ADC_Keywords: Clusters, globular ; Photometry, UBVRI ; Proper motions Keywords: catalogs - astrometry - Galaxy: globular clusters: general - Galaxy: globular clusters: individual (omega Cen) - stars: Populations II - stars: Hertzprung-Russell (HR) and C-M diagrams Abstract: omega Centauri is the most well studied Galactic Globular Cluster because of its numerous puzzling features: significant dispersion in metallicity, multiple populations, triple main-sequence, horizontal branch morphology, He-rich population(s), and extended star-formation history. Intensive spectroscopic follow-up observing campaigns targeting stars at different positions in the color-magnitude diagram promises to clarify some of these peculiarities. To be able to target cluster members reliably during spectroscopic surveys and both spatial and radial distributions in the cluster outskirts without including field stars, a high quality proper-motion catalog of omega Cen and membership probability determination are required. The only available wide field proper-motion catalog of omega Cen is derived from photographic plates, and only for stars brighter than B∼16. Using ESO archive data, we create a new, CCD-based, proper-motion catalog for this cluster, extending to B∼20. We used high precision astrometric software developed specifically for data acquired by WFI@2.2m telescope and presented in the first paper of this series. Description: Wide-field (∼33'x33') proper motion catalog for nearly 360000 stars centered around Omega Cen center. Calibrated and sky concentration corrected UBVRCIC wide-band photometry plus a narrow-band filter centered on Halpha. Membership probability determination with two different, complementary methods. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 164 359391 Astrometric and photometric parameters for 359391 objects (table6 of the paper) table3.dat 16 343 Membership probability for the Kaluzny et al. (2004, Cat. J/A+A/424/1101) variable star catalog
See also: J/AJ/108/1350 : Omega Cen FUV photometry (Whitney+, 1994) J/PASP/106/828 : BVRI photometry of Omega Cen (Walker 1994) J/A+AS/115/297 : BVRI photometry of Central Field of Omega Cen (Lynga+, 1996) J/AJ/119/1225 : Stroemgren photometry of Omega Cen & NGC 6397 (Hughes+, 2000) J/A+A/400/521 : Omega Cen XMM observations (Gendre+, 2003) J/AJ/127/958 : CCD BV photometry on Omega Cen (Rey+, 2004) J/A+A/424/1101 : Variable Stars in the field of ω Cen (Kaluzny+, 2004) J/A+A/445/503 : Radial velocities in Omega Cen (NGC 5139) (Reijns+, 2006) J/AJ/135/1395 : omega Cen Spitzer photometry (Boyer+, 2008) Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 6 I6 --- Seq [1/376478] Star sequential number 8- 17 F10.6 deg RAdeg Right ascension (J2000, Epoch J2003.29) 19- 28 F10.6 deg DEdeg Declination (J2000, Epoch J2003.29) 30- 37 F8.3 pix Xpos X master frame position (distortion free) 39- 46 F8.3 pix Ypos Y master frame position (distortion free) 48- 53 F6.2 mas/yr pmRA Proper motion along RA, pmRAcosDE 55- 59 F5.2 mas/yr e_pmRA Proper motion rms along pmRAcosDE 61- 66 F6.2 mas/yr pmDE Proper motion along pmDE 68- 72 F5.2 mas/yr e_pmDE Proper motion rms along pmDE 74- 79 F6.3 mag Umag ?=99.999 Johnson U visual magnitude (1) 81- 86 F6.3 mag e_Umag ?=99.999 Johnson U visual magnitude rms (1) 88- 93 F6.3 mag Bmag ?=99.999 Johnson B visual magnitude (1) 95-100 F6.3 mag e_Bmag ?=99.999 Johnson B visual magnitude rms (1) 102-107 F6.3 mag Vmag ?=99.999 Johnson V visual magnitude (1) 109-114 F6.3 mag e_Vmag ?=99.999 Johnson V visual magnitude rms (1) 116-121 F6.3 mag Rcmag ?=99.999 Cousins R visual magnitude (1) 123-128 F6.3 mag e_Rcmag ?=99.999 Cousins R visual magnitude rms (1) 130-135 F6.3 mag Icmag ?=99.999 Cousins I visual magnitude (1) 137-142 F6.3 mag e_Icmag ?=99.999 Cousins I visual magnitude rms (1) 144-149 F6.3 mag Ha ?=99.999 Halpha visual magnitude (1) 151-156 F6.3 mag e_Ha ?=99.999 Halpha visual magnitude rms (1) 158-160 I3 % Mm Membership probability 162-164 I3 % Mm2 ?=-1 Membership probability alternative (2)
Note (1): If an object is not been measured in a filter, a flag equal to 99.999 is set for magnitude value and relative magnitude rms. Note (2): Membership probability determination with an alternative method for 120227 objects. A value of -1 is set for undetermined memberships.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 5 A5 --- VName Variable name (VNNN or NVNNN) 7- 9 I3 % Mmb Membership probability 11- 16 I6 --- Seq Star sequential number
Acknowledgements: Andrea Bellini, bellini(at)ustsci.edu History: * 22-Jan-2009: Original version * 09-Mar-2009: table3 added (from Andrea Bellini) * 30-Mar-2011: corrected version of table3 (from Andrea Bellini)
(End) Patricia Vannier [CDS] 22-Jan-2009
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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