Document Number:   WFC-CAS-WPS-00000-00031 
Document Title:   End of Month Report Sep 05 
Document Authors:  Mike Irwin, Simon Hodgkin 
Document Issue:  1 
Document Date:  5/10/2005 
 
This document presents work package progress by CASU during September
2005.  For further details of group activities over the past month and
quarter see http://www.ast.cam.ac.uk/vdfs/diary.html. For the minutes
of all group meetings see http://www.ast.cam.ac.uk/vdfs/docs/minutes
 
UKIDSS and VDUC 
 
VDUC met at the IoA on 6th September. MJI, STH and PSB attended. MJI
presented a talk covering the status of WFCAM and the outlook for
VISTA. Tim Naylor made a comparison between his own
photometry/catalogue generation software and CASU's for an example
WFCAM image. He found similar numbers of objects but went slightly
deeper. He found that the pipeline error estimates were larger than
his own at the faint end. We are looking at this, but will probably
only resolve this issue when we generate our own profile magnitudes.
 
A third UKIDSS SciVer meeting was hosted by CASU on Sept 21st. STH and
EGS presented talks, MR and JRL also in attendance. Useful feedback
was received on object classification and deblending. Some of the
issues raised at the previous meeting concerning differences between
CASU magnitudes and manually derived magnitudes were clarified.
 
STH hosted the WFCAM calibration meeting (attended by Paul Hewett,
Steve Warren & Nick Cross) and presented his analysis of 05A data
(sent to the working group as a document in the week before). The
meeting asked STH to (i) complete the analysis of spatial systematics
using the mesostep data to confirm his finding that there are no
systematics at the 2% level, and (ii) to investigate the 2MASS
catalogue for global systematics using the WFCAM data. A new report
will be circulated by October 24th with a plan to meet in early
November.  The current version will be circulated to a wider audience.
 
WFCAM processing status & Software Updates 
 
The full catalogue standard parameter set has now been completed and
tested. As a result, all 05A data have been reprocessed to include the
full parameter set: 1. new magnitudes (Petrosian, Kron, Hall)
2. errors on the measured quantities 3. the larger apertures have been
rescaled to be smaller (the largest has been shrunk from 64 to 24
arcsecs).  These data have been made available to WFAU and
transferred. CASU are keen to encourage wider community access to this
processed data.
 
Tests with the cross-talk removal algorithm have been promising. MJI
presented some of the results at the VDUC meeting. The plan is to
incorporate cross-talk removal from the start of 05B processing and a
pipeline version has now been implemented.
 
MR and EGS have released V1.0 of the WFCAM DQC archive and ingested
the FITS headers for the entirety of 05A. The archive provides links
to the catalogues and thumbnails of images. This is already proving to
be an invaluable tool for detailed investigations of the processed
data and will form the resource for generating survey progress WWW
pages.
 
Two new disc servers (8 TBytes each) have been installed 
 
VISTA 
 
JRL has made significant progress with coding and documentation
towards DRL V0.1.  Much of the low level software has been written,
including routines to Manipulate the WCS and do robust statistics. The
required low-level routines to parse headers are also being. One third
of the 18 DRL functions (Chapter 6 of the DRLD) have been
written. Four of the 14 CPL plugins (Chapter 7 of the DRLD) have been
written. The catalogue generation and object classification software
have also been completely ported.