Nuevo Observatorio Virtual Argentino

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VVV Survey Band Merged JHKs


Band merged JHKs catalogue for first epoch data from CASU v1.3. VVV DR1, corrected for header errors (Mike Irwin, Private Communication). Release of the Milky Way bulge and southern plane from the near-infrared ESO public survey VISTA variables in the Vía Láctea.


Sebastian Gurovich
Observatorio Astronomico de Cordoba, Argentina

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Context. The ESO public survey VISTA variables in the Vía Láctea (VVV) started in 2010. VVV targets 562 sq. deg in the Galactic bulge and an adjacent plane region and is expected to run for about five years.

Aims: We describe the progress of the survey observations in the first observing season, the observing strategy, and quality of the data obtained.

Methods: The observations are carried out on the 4-m VISTA telescope in the ZYJHKs filters. In addition to the multi-band imaging the variability monitoring campaign in the Ks filter has started. Data reduction is carried out using the pipeline at the Cambridge Astronomical Survey Unit. The photometric and astrometric calibration is performed via the numerous 2MASS sources observed in each pointing.

Results: The first data release contains the aperture photometry and astrometric catalogues for 348 individual pointings in the ZYJHKs filters taken in the 2010 observing season. The typical image quality is 0.9 arcsec {-1.0 arcsec}. The stringent photometric and image quality requirements of the survey are satisfied in 100% of the JHKs images in the disk area and 90% of the JHKs images in the bulge area. The completeness in the Z and Y images is 84% in the disk, and 40% in the bulge. The first season catalogues contain 1.28 × 108 stellar sources in the bulge and 1.68 × 108 in the disk area detected in at least one of the photometric bands. The combined, multi-band catalogues contain more than 1.63 × 108 stellar sources. About 10% of these are double detections because of overlapping adjacent pointings. These overlapping multiple detections are used to characterise the quality of the data. The images in the JHKs bands extend typically 4 mag deeper than 2MASS. The magnitude limit and photometric quality depend strongly on crowding in the inner Galactic regions. The astrometry for Ks = 15-18 mag has rms 35-175 mas.

Conclusions: The VVV Survey data products offer a unique dataset to map the stellar populations in the Galactic bulge and the adjacent plane and provide an exciting new tool for the study of the structure, content, and star-formation history of our Galaxy, as well as for investigations of the newly discovered star clusters, star-forming regions in the disk, high proper motion stars, asteroids, planetary nebulae, and other interesting objects. Based on observations taken within the ESO VISTA Public Survey VVV, Programme ID 179.B-2002.


VVV DR1: The first data release of the Milky Way bulge and southern plane from the near-infrared ESO public survey VISTA variables in the Vía Láctea

Data Table Fields:

NameTable Head DescriptionUnitUCD
tile_name Tile id source tile name N/A meta.code;
ra_h Ra_h J2000 deg pos.eq.ra
dec_h Dec_h J2000 deg pos.eq.dec
ra_j Ra_j J2000 deg pos.eq.ra
dec_j Dec_j J2000 deg pos.eq.dec
ra_k Ra_k J2000 deg pos.eq.ra;meta.main
dec_k Dec_k J2000 deg pos.eq.dec;meta.main
mag_h Mag_h H-band mag mag phot.mag
mag_j Mag_j J-band mag mag phot.mag
mag_k Mag_k Ks-band mag mag phot.mag
magerr_h Magerr_h H-band mag mag phot.mag
magerr_j Magerr_j J-band mag mag phot.mag
magerr_k Magerr_k Ks-band mag mag phot.mag
sourceclass_h Sourceclass_h H-band source class: -9 saturated, -7 bad pix,-2 borderline stellar, -1 stellar, 0 noise, +1 non-stellar N/A src.class
sourceclass_j Sourceclass_j J-band source class: -9 saturated, -7 bad pix, -2 borderline stellar, -1 stellar, 0 noise, +1 non-stellar N/A src.class
sourceclass_k Sourceclass_k Ks-band source class: -9 saturated, -7 bad pix, -2 borderline stellar, -1 stellar, 0 noise, +1 non-stellar N/A src.class
phys_p_angsize_h Phys_p_angsize_h H-band Petr radius pix phys.angSize
phys_p_angsize_j Phys_p_angsize_j J-band Petr radius pix phys.angSize
phys_p_angsize_k Phys_p_angsize_k Ks-band Petr radius pix phys.angSize
phys_h_angsize_h Phys_h_angsize_h H-band hall radius pix phys.angSize
phys_h_angsize_j Phys_h_angsize_j J-band hall radius pix phys.angSize
phys_h_angsize_k Phys_h_angsize_k Ks-band hall radius pix phys.angSize
phys_k_angsize_h Phys_k_angsize_h H-band Kron radius pix phys.angSize
phys_k_angsize_j Phys_k_angsize_j J-band Kron radius pix phys.angSize
phys_k_angsize_k Phys_k_angsize_k Ks-band Kron radius pix phys.angSize
source_ellipticity_h Source_ellipticity_h H-band N/A src.ellipticity
source_ellipticity_j Source_ellipticity_j J-band N/A src.ellipticity
source_ellipticity_k Source_ellipticity_k Ks-band N/A src.ellipticity
pos_ang_h Pos_ang_h H-band source position angle deg phys.angSize;src
pos_ang_j Pos_ang_j J-band source position angle deg phys.angSize;src
pos_ang_k Pos_ang_k Ks-band source position angle deg phys.angSize;src
epoch_h Epoch_h H-band Epoch MJD day time.epoch;obs
epoch_j Epoch_j J-band Epoch MJD day time.epoch;obs
epoch_k Epoch_k Ks-band Epoch MJD day time.epoch;obs
row_id Row Id NOVA row identifier N/A;meta.main
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