Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/science/share/minutes.042501 Дата изменения: Wed Feb 6 16:58:25 2002 Дата индексирования: Tue Oct 2 08:40:17 2012 Кодировка: Поисковые слова: http astrokuban.info astrokuban

MINUTES OF SHARE MEETING 4/25/01

We started with a series of planned presentations on the status of several
"works in progress":

1. Daryl Swade gave us a summary of OTFR and its implications.
OTFR changes our notion of an archive from "stored calibrated data" to
"stored telemetry and s/w needed to process and calibrate it".
This makes it an "active archive".

2. Paolo Padovani talked about the data "scrapbook" being rolled out by the
archive:
- Prototype for release by June AAS meeting
- Delivers previews for all bands/instruments at a given point/object
on the sky
- SHARE should provide input on where to go next
- This process has provided databases that now make it possible to do
searches like "all WFPC2 images with > 1 filter at a given location."

3. ACS pipeline described by Bill Sparks and Marc Postman

1- alignment module - get registration right
2- PyDrizzle
3- sextractor - object detection, photometry, classification
4- BPZ - Bayesian Photometric Redshift algorithm
5- Morphological fits - bulge/disk decomposition etc.

4. ECF/WFPC2 Processing
- Defining WFPC2 associations to produce stacked images.
Had to recreate some jitter files.
Uses a PRE-BUILT CATALOGUE to be delivered later this year.
- Basically restricted to CR-SPLIT images
- Can't deal with dithered images

5. New archive distribution system slated for August
- Will deliver compressed data, different formats, selected files.
- No accounts will be required for public data.
- Will handle multimission data.

We then heard from various committee members on a wish list of potential
processing/reprocessing ideas for SHARE to consider in its implementation
timetable:

1. Anton K.
- Produce generalized overlap/combined/drizzled images
- Allow different representations - color images, contours

2. Mark D.
- Discussed crucial science issues that are important prior to
producing ditheredimages:

How good is my astrometry?
==> Tune-up the WCS as a post-processing step.
This may give a better starting point for cross-correlation
registration techniques.
As an example, SIRTF in working on identifying 2MASS stars
in their images as astrometric references.

3. Bill S.
- agreed that better astrometry and WCS updates were important
- As a value added-product for later use, it would be good to enhance
the data quality array-- create a unique mask for CRs and hot pixels
for each image and save it.

By email, Dorothy F. suggested the following (brief summary-- she sent emails
to the full group):

- If users create valuable products, encourage them to submit them
to the archive.
- Consider encouraging users to write processes for OTFR implementation
- More generalized searches across the archive
- Allow the use to choose the delivery media (charge, if necessary)
- SHARE group should discuss qulaity information associated with a
data set.
- Specific special processing examples:
* Create an image in wavelength band(s) at
* Create a spectrum covering for