WFPC2 Archival Pure Parallels Project (APPP)
Archival Pure Parallels Project (APPP)
The Archival Pure Parallel Project has processed with state-of-the-art
tools 9136 WFPC2 images, primarily in the wide UBVI filters, obtained
in parallel with other HST instruments. We produced combined,
drizzled, cosmic-ray cleaned images for each pointing. These data can
be used to address a wide range of science topics: measuring the
cosmic shear on scales from 20 arcsec to 2 arcmin; discovering ~ 50
starforming galaxies at z ~ 4; finding optical counterparts to AGNs in
wide-area radio and X-ray catalogs; improving the determination of the
scale length of the Galactic disk; and studying stellar populations
down to 1 solar mass for about 25 separate lines of sight in the
Magellanic Clouds.
We have delivered a total of 2481 science images and associated weight
files to the MAST archive. These images cover 1743 distinct pointings
on the sky with a combined on-sky exposure time of about 7.8 million
seconds. These images are being made available to the
astronomical community for a wide variety of other investigations,
thus helping realize the legacy of WFPC2 parallel images.
Check the project
proposal for details on the project as it was proposed. The details of the processing pipeline are described in a paper published in the PASP.
The v2.0 data can be searched and downloaded
via the APPP data
page on MAST. You may also
download the data via anonymous ftp by ftping to archive.stsci.edu and
then cd /pub/hlsp/appp . The data are stored in subdirectories by
pointing name under the subdirectories lmc, smc, nbg, fnd, ffd, tfd and
sfd. The README
contains a high level description of the data.