Tera-minutes of the April 02 , 2004 Tera-meeting

SEx-server (Gerard):
 The AVO-cat name proposed by Laurent is adopted.
 Gerard is implementing a VO-table format in SExtractor. This turns out to be the most efficiency and logical way to add VO-tools functionality to SExtractor.
 Gerard will meet CDS next week at IAP in order to get UCDs.
 Prototype expected: next week, with a demo on Friday April 12.

DEfectix (Anthony)
 Anthony showed masks and tested the masking procedure on real megacam images. Though still in a rough shape, looks very promising.
 Anthony will implement a full resolution (without re-binning but the initial 4x4 rebinning step)
 Better to have sliding block maps to improve resolution and provide better defect analysis.

Skywatcher (Jean-Christophe)
 WCS lib. implemented; projections work fine.
 Need to handle RA boundaries.
 Implementation of libXML2 to handle XML files and to extract FITS header information from the database.

QualityFITS (Fred)
 WCS lib. implemented. Next release will then handle CCDs in right astronomical coordinate systems. The PSF anisotropy mapping will then be almost instantaneous.
 Need to handle carefully world-to-pixel orientation during projections
 Implementation of image naming according to ICD still to be done.
 Portability: CFITSIO (patch), PLPLOT 5.2, WCS
 Release for Terapix expected by Monday April 5.
 Once done, Laurent will run immediately 03AL, 03BL, and 03AF19 Cosmos data needs clarifications from Henry before running Qfits again.

Astrometrix/Photomterix (Fred)
 All Mario's tool installed on Opteron. Prerepix removed since useless. Fred did a careful installation without using Mario's cookbook. All executables are installed in /usr/local/bin

 Mireille will test the Opteron release on W3-W2 data in order to check final results as compared to 32 bits processors.

SCAMP (Emmanuel)
 Implementation of photometric inter-calibration not finished yet.
 Illumination correction handled using a polynomial fit
 SCAMP photometric rescaling will be written as a new FITS Keyword, so neither CFHT ZP nor CFHT extinction keyword will be modified.
 Jean-Christophe will check whether the skyprobe value is not written in the FITS header. This must be the exact skyprobe value, when the exposure was started.
 Mireille will send W3-W2 pre-survey .LDACs to Emmanuel in order to test SCAMP on images with 1/2 megacam-size overlaps.
 Expected SCAMP release date to Terapix: Monday April 5 (2004!).

Pre-survey W3-W2 data (Mireille)
 Mireille used 47 W3 pre-survey images to produce a 102' x 475' image. Astrometry looks good over the whole field. Better to wait for new weightmaps prior to swarp. Need new QualityFITS release.

 Mireille raised the issue of handling giant images. A tool which allows anyone to cut images of any size is definitely needed. Imcopy cannot handle very big images. toFITS2d seems to do so but we only have a executable for Opteron. The following actions are proposed:

 Ask OAC whether they can provide toFITS2d source code to Terapix. Then install a 32- and 64-bits versions on all Terapix computers.
 If this solution does not work, Jean-Christophe will write the code to cut megacam images.

Data Sophie Maurogordato (Gilles):

 Weightmaps still under construction. Running QualityFITS on old-CFH12K data not trivial. Should be done this coming week.

Hardware: almost nothing.
 Gilles will provide a disk to Fred to close /home of clix.

Next meeting: Friday April 9. 2004