Data made available through STEP is
for testing cosmic shear analysis only.
If you wish to make use of the data
for other purposes contact the PIs of each survey. If you wish to
publish cosmic shear results from STEP data please first discuss your findings
through the STEP mailing list to give
the original owners of the data a chance to respond and collaborate.
- From Yannick, Ludo and Elisabetta, there is the
VLT data obtained with the FORS instrument (Maoli et al),
available for cosmic shear testing,
- You can get the data on the ftp anonymous site terapix.iap.fr,
in the pub/VLTshear directory. It contains the following directories:
vlt_catalogs , vlt_images , vlt_masks
- The images are the final stacked data only (individual images
will be provided in a next step, if needed).
- The catalogues are the SExtractor catalogues generated by
Semboloni who measured the E and B modes in the VLT data (and found
zero signal for the B-modes).
- The masks contain the polygons as well as the ellipses of each
object detected. The masks have been written in the SAOimage format
(not DS9). Each contains at least masks for the periphery and for
the central cross that masks the low S/N area produced by 4 outputs
used to read the CCD (4 quadrants read).
- Click here for summary and references, target positions on
the sky, target
positions and finding charts and summary of each
stacked image. For details of each stacked image click on target indent.
Coming soon: Archive WFI data
- The COMBO-17 team
have made deep R-band
data, obtained with the WFI instrument, available for cosmic shear testing.
This data set contains 5 30x30 arcminute fields; 4 'blank fields' plus the
A901 super-cluster field analysed in Gray et. al. 2002. Details of the COMBO-17 cosmic shear analysis can be found in Brown et. al. 2003.
- You can download the data from ftp.mpia.de.
The pub/COMBO/STEP directory contains the following images:
- The images are the final stacked data. Each CCD chip
has been separately reduced and the recombined to produce the final 8k
(quarter square degree) fits
image. Note that the WFI camera has 8
chips that are arranged in an 4x2 formation (see Brown et. al. 2003 for details).
- Click here for target positions
Last modified 1st Nov.
STEP pages maintained by Catherine Heymans: heymans[at]physics.ubc.ca