GOODS/VIMOS Imaging Data Release: Version 1.0
24 April 2009
As part of the Great Observatories Origins Deep Survey (GOODS), deep imaging in the Chandra Deep Field South (CDF-S) has been carried out, using theinstrument mounted at the Melipal Unit Telescope of the VLT at ESO's Cerro Paranal Observatory, Chile.
This data release contains the coadded images in U band from the ESO large programme 168.A-0485 (P.I. C. Cesarsky) which have been obtained in service mode observations between August 2004 and fall 2006.The 1-sigma depth for VIMOS U band in the area covered by the GOODS-ACS observations is ~30 AB (within an aperture of 1" radius, ranging from 29.5 and 30.2 AB). The PSF of the VIMOS U band mosaic is ~0.8" FWHM, but varies over the field. The deepest ultraviolet image of the Universe yet has been featured in ESO press release 39/08.
Also included in this data release is a coadded image in R band obtained from data retrieved from the ESO archive. Due to the different observing strategies adopted in the programmes the resulting coverage of the GOODS-ACS area is more complex than for the U band. The depth of the VIMOS R band mosaic over the ACS area ranges from ~28 AB to 29 AB (1-sigma, 1" aperture radius). The PSF of the VIMOS R band mosaic is ~0".7 FWHM and varies over the field.
Layout of observations
|Areal coverage as a function of exposure time for the GOODS-ACS region (left) and for the whole survey (right). Click on each of the images to enlarge.
This release contains the photometrically and astrometrically calibrated mosaics of VIMOS U band and VIMOS R band and the related weight maps. The raw data the U band mosaic was produced from is listed here. The R band mosaic includes data from the ESO programmes, primarily 167.D-0492 (P.I. Fransson), and also 171.A-3045, 080.A-0556, 080.A-0411, 078.A-0485, 078.A-0425, 075.A-0481, 074.A-0280, 074.A-0303, 074.A-0509, 072.A-0586, 071.A-3036, and 60.A-9050. The list of 610 raw images stacked for the R band mosaic can be retrieved here.
Both VIMOS U band data and VIMOS R band data images have been astrometrically calibrated against a catalogue extracted from WFI R band mosaic of the GaBoDS/WFI release version 1.1. The pixel scale for both mosaics is 0".205/pixel. The mosaics' photometric zero points have been obtained from standard star observations as described in the accompanying paper. Notice the system response of VIMOS U and other U band filters. The zero points of the mosaics are: VIMOS U band 26.15 AB, with an AB_correction of 0.515, and VIMOS R band 27.49 AB with an AB_correction of 0.223. The AB corrections, in the sense of AB=Vega+AB_correction, were derived using the ESO mag-to-flux converter.
A full description of the data reduction steps can be found in the accompanying publication "Deep U band and R band Imaging of GOODS-South: Observations, data reductions and first results" by Nonino et al. 2009, ApJSS 183 (2009) 244-260, 10.1088/0067-0049/183/2/244.
This data release contains four files: VIMOS U band mosaic, VIMOS U band weight mosaic, VIMOS R band mosaic, VIMOS R band weight mosaic. The weight images are defined as a inverse variance map (e.g. it should be used with SExtractor using the parameters: -WEIGHT_IMAGE weight_map.fits -WEIGHT_TYPE MAP_WEIGHT). All relevant parameters are included in the FITS headers.
The data products in this release that can be retrieved are listed in the table below:
|GOODS_VIMOS_MOSAIC_U_V1.0.fits||U-band mosaic image||304.4 MB|
|GOODS_VIMOS_MOSAIC_U_V1.0.WEIGHT.fits||U-band mosaic weight map||304.4 MB|
|GOODS_VIMOS_MOSAIC_R_V1.0.fits||R-band mosaic image||196.0 MB|
|GOODS_VIMOS_MOSAIC_R_V1.0.WEIGHT.fits||R-band mosaic weight map||196.0 MB|
Please request your copy of the data from the ESO Science Archive using the data request submission form.
We acknowledge the financial contribution from contract ASI I/016/07/O and from INAF. When using data products provided in this release, acknowledgement should be given in the text to the ESO/GOODS programme, referring to the publication