J/A+A/464/373 VRIZJHK photometry around Alpha Cen (Kervella+, 2007)
Deep imaging survey of the environment of Alpha Centauri II. CCD imaging with the NTT-SUSI2 camera. Kervella P., Thevenin F. <Astron. Astrophys. 464, 373 (2007)> =2007A&A...464..373K
ADC_Keywords: Stars, double and multiple ; Photometry, CCD ; Photometry, infrared Keywords: stars: individual: Alpha Cen - planetary systems - stars: imaging - solar neighbourhood - astronomical data bases: miscellaneous Abstract: Thanks to its proximity, alpha Centauri is an outstanding target for an imaging search for extrasolar planets. We searched for faint comoving companions to alpha Cen located at angular distances of a few tens of arcseconds, up to 2-3 arcmin. We obtained CCD images from the NTT-SUSI2 instrument in the Bessel V, R, I, and Z bands, and archive data from 2MASS. Description: table1.dat lists the background sources identified on deep CCD images of the close environment of Alpha Centauri (up to approximately 2.5'). Our VRIZ photometry has been complemented by JHK photometry extracted from the corresponding 2MASS images (Skrutskie et al., 2006AJ....131.1163S). This catalogue is particularly intended to provide a reference for future searches for faint companions of Alpha Centauri. Unavailable values are replaced by 99.00 in the table. We have revised the coordinates of the catalogue published in 2007. They are now much more consistent with reference astrometric catalogues such as 2MASS (Cat. II/246). There was a shift of typically 2 arcseconds between the 2MASS and SUSI2 coordinates, and now this is reduced to less than 0.5 arcsecond. We have also recomputed the photometric magnitudes using more accurate aperture corrections and instrument zero points The new version of the table is available on 13-Jun-2016, in place of the old one, in Vizier. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 114 4313 *Catalogue of background sources near Alpha Cen
Note on table1.dat: Coordinates and magnitudes revisited, on 13-Jun-2016, from author.
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq Catalogue number 6- 7 I2 h RAh Right ascension (J2000) 9- 10 I2 min RAm Right ascension (J2000) 12- 17 F6.3 s RAs Right ascension (J2000) 19 A1 --- DE- Declination sign (J2000) 20- 21 I2 deg DEd Declination (J2000) 23- 24 I2 arcmin DEm Declination (J2000) 26- 30 F5.2 arcsec DEs Declination (J2000) 32- 36 F5.2 mag Vmag ?=99.00 Bessel V band magnitude 38- 42 F5.2 mag e_Vmag ?=99.00 Uncertainty on V magnitude (1) 44- 48 F5.2 mag Rmag ?=99.00 Bessel R band magnitude 50- 54 F5.2 mag e_Rmag ?=99.00 Uncertainty on R magnitude (1) 56- 60 F5.2 mag Imag ?=99.00 Bessel I band magnitude 62- 66 F5.2 mag e_Imag ?=99.00 Uncertainty on I magnitude (1) 68- 72 F5.2 mag Zmag ?=99.00 Bessel Z band magnitude 74- 78 F5.2 mag e_Zmag ?=99.00 Uncertainty on Z magnitude (1) 80- 84 F5.2 mag Jmag ?=99.00 2MASS J band magnitude 86- 90 F5.2 mag e_Jmag ?=99.00 Uncertainty on J magnitude 92- 96 F5.2 mag Hmag ?=99.00 2MASS H band magnitude 98-102 F5.2 mag e_Hmag ?=99.00 Uncertainty on H magnitude 104-108 F5.2 mag Kmag ?=99.00 2MASS K band magnitude 110-114 F5.2 mag e_Kmag ?=99.00 Uncertainty on K magnitude
Note (1): A systematic error of 0.2mag is applied to all magnitudes.
Acknowledgements: Pierre Kervella, pierre.kervella(at)obspm(fr) References: Kervella et al., Paper I 2006A&A...459..669K History: * 22-Feb-2007: First on-line version * 13-Jun-2016: Corrected version, from author
(End) P. Kervella [Observatoire de Paris], Patricia Vannier [CDS] 13-Jun-2016
|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|