28 August 2003 Present: STH, JRL, DWE Apologies:: MJI, PSB, JMI Agenda ------ 1. Actions from last meeting 2. Comments on WFAU minutes 3. Progress for monthly report 4. Comments on JMI reports prior to release: a) Difference imaging b) Simulations c) DQC info (wfcam internal www pages/diary page) 5. Discussion of On-Sky Characterization (http://www.jach.hawaii.edu/JACpublic/UKIRT/instruments/ wfcam/commissioning/) 6. ESO docs and VISTA fits headers (http://www.ast.cam.ac.uk/~wfcam/internal/pete/did/VISTA.FITS) 7. AOB Minutes ------- 1. Actions from last meeting STH has received data from Sandy Legget. Unfortunately the two scheduled nights were clouded over and a previous night of data was sent to STH. This is regarded as a start. STH will check the data and (probably) send in a request for more data. <<<< STH corrected an error in the yearly totals for the WP spreadsheet. He pointed out that the PS and PDF versions had not been updated yet. It was agreed that in addition to the XLS version only a PDF version will be supplied in future. MJI have made progress with the pipeline milestones tasks and dates. It still JRL needs some work on dates before it can be released on the web page <<<< MJI has made no progress regarding finding out about the UKIDSS Survey Manager appointment on Hawaii. This will await AA's return from holiday. <<<< MJI has started updating Section 2. of DFS user requirements document. This action is ongoing. <<<< JRL placed V0.6 of FITS header document on docs web page - now awaiting ROE progress on this. PSB updated the DFS docs JMI updated simulation report and has placed on the internal web pages. +ALL Comments from rest of CASU group are still expected before the document goes public. These should be sent to JMI by Monday afternoon. This also applies to the image subtraction and DQC document <<<< MJI has sent JRL the latest version of imcore_wfcam MJI contacted Mark Casali regarding the engineering data status. He is awaiting a reply. [Received following reply shortly after the meeting included here for ease of reference] "No, no new data - we've had problems with the detectors - damage due to thermal cycling. We've been working with a specialist from Rockwell here for the last week trying to find the problem...hope to be testing again soon, but we clearly have substantial verification to do before we are confident enough to test another detector." 2. Comments on WFAU minutes It was noted that the LT01 vs LT02 compatibility tests have been carried out successfully at ROE. 3. Progress for monthly report STH noted that he wanted the monthly reports in by Friday afternoon (Monday at the latest) based on the deliverables for the quarter and updating the 03Q3m1 document. <<<< DWE said that he had been in contact with Emmanuel Bertin and has now got SWarp working with fractional pixel shifts as expected. 4. Comments on JMI reports prior to release: (a) Difference imaging (b) Simulations (c) DQC info As mentioned previously, further comments on these to JMI as soon as possible and by Monday afternoon at latest. MJI has already handed in his comments. STH said that one of the things needed in (a) is more of an introduction. For example, what is adaptive kernel matching? This should be short, but something is needed by readers that know little about this subject. What is image subtraction used for ? [Added by MJI after - MJI disagreed somewhat, commenting the report is not meant to be a standalone review but rather a a comparison of different image subtraction techniques. However, he will add a brief introduction plus references setting the context before placing it on the public web page.] <<<< Also it was felt that (a) needed a conclusions and a summary section. This is related to previous comments that it was difficult to quantify how good a difference imaging algorithm was performing. Considering how the results would be used by the users might be a reasonable way of looking at this. [Added by MJI after - this comes later in phase II of the work and the report. The current document is interim (Phase I) but should be released for external comment now]. Report (b) was considered by STH to be ready for release soon (before monthly meeting). In general, both (a) and (b) required a little more concerning context ie. why are we doing this? what will the results be used for? what are the requirements? etc. <<<< Document (c) is a demonstration of DQC and pipeline progress monitoring rather than a report. Although none are in final form, since these are all working documents they should all be released on the public side of the web page before the MC meeting for feedback. <<<< 5. Discussion of On-Sky Characterization JRL commented that the persistence part of the characterization did not deal with the spreading of the image. Persistence has a spatial as well as a temporal part that needs to be quantified. STH was concerned about the setting up of the photometric standard fields. It didn't seem to be very prominent. This needs to be included in the WFCAM timeline and clarified within the characterization plan. STH needs to email Paul Hirst or Andy Adamson. <<<< MJI had sent in some comments that were similar to STH's. 6. ESO docs and VISTA fits headers JRL said that he had looked at the headers document. He will send in his comments to PSB. <<<< DWE raised the issue about the requirement to have the EQUINOX keyword in the FITS header. It was pointed out that if the keyword RADECSYS is "ICRS" then equinox has no meaning ie. the ICRS is not linked to the Earth's pole. By leaving it in you run the risk of confusion. MJI pointed out that by removing it you run the risk of most packages not working. Concerning the ESO documents, in the DID the FITS headers description has been written, CalDoc has been updated and there is no change in the User Requirements Document. We all should have a read of these and provide comments for PSB. <<<< When JRL is at ADASS he will talk to ESO attendees regarding CPL. 7. AOB JRL said that he had been in touch with Paul Aslin concerning the renewal of our contracts. It would seem that since our contracts only need renewal in October, the University has put the work on hold since it needs to sort out their September contracts first. Continuing Actions ------------------ STH check Sandy Legget's data and (probably) send in a request for more data. MJI finalize and release the pipeline milestones tasks and dates. JRL MJI await reply from AA concerning the UKIDSS Survey Manager appointment on Hawaii. MJI continue updating Section 2. of DFS user requirements document. JMI Send comments regarding JMI's three reports to him by Monday afternoon +ALL (or sooner). [simulations, image subtraction and DQC] New Actions ----------- ALL send monthly reports to STH by Friday afternoon (Monday at the latest) MJI write intro for difference imaging report by Monday afternoon STH write context intro for simulation report by Monday afternoon JMI incorporate feedback, update documents and link from public web page STH email Paul Hirst or Andy Adamson concerning the the setting up of the photometric standards fields within the characterization plan. JRL send comments to PSB about the FITS headers document. ALL read ESO documents and provide comments for PSB.