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EPOXI: Transiting Planet Systems |
Status: Archived
This data set set contains raw images of eight known transiting extrasolar planetary systems (hot Jupiters) acquired by the Deep Impact High Resolution Visible CCD (HRIV) during the EPOCh phase of the EPOXI mission. From 22 January through 31 August 2008, EPOCh took advantage of the permanent on-orbit defocus of the HRI telescope by using the HRIV CCD to collect over 172,000 usable, photometric-quality, visible light images of these exoplanet systems: HAT-P-4, HAT-P-7, GJ 436, TrES-2, TrES-3, XO-2, XO-3, and WASP-3. Time series of continuous 50-second integrations in a subframe mode of 128x128 or 256x256 pixels with the clear #6 optical filter (350 to 1000 nanometers) were used to observe each system for about three weeks, typically covering five or more transits as well as secondary eclipses; an exception is XO-3 which was observed only briefly before the spacecraft unexpectedly entered safe mode. For most observations the 128x128-pixel subarray was used. The larger subarray of 256x256 pixels was commanded during some transit and secondary eclipse periods to ensure that pointing jitter did not cause the star to fall beyond the edges of the subarray. The transiting planet systems were observed in the integrated light of the planet and star; no spatially resolved image of the planet was possible. The out-of-focus HRIV telescope defocuses the images to about 10 pixels or 4 arcseconds at full-width half-max.
The observational data have been broken down into daily .TGZ (gzipped tar) files by target for easier downloading:
The catalogs, documents, indices, and supporting files for this data set can be downloaded here:
A file of MD5 checksums for the download files is available here.
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In case you're wondering...
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An overview of the volume contents is provided in the aareadme.txt file.
Before attempting to use this data, users should read the errata.txt file.
Catalog files contain the overview information and parameters used in loading the PDS central catalog, specifically, or for developing other interfaces to the data outside of PDS. The information they contain, particularly in their descriptive text fields, should be clear, complete, and understandable to a research user who is not necessarily a mission or instrument specialist.
These files are located in the catalog/ directory. The directory contents are described by the catinfo.txt file.
The current documentation for the EPOXI and Deep Impact missions has been collected into a separate volume. The root of this volume is here. The contents are described in the aareadme file in the root of the documentation volume. However some specific documents are duplicated in this data set to assist with understanding the data and processing involved. These files are located in the document/ directory. The directory contents are described by the docinfo.txt file. Please note these documents may be older versions of those found in the EPOXI and Deep Impact documentation set.
The data/ are grouped into subdirectories by target, observation year, and sequential day number. The data are FITS files with multiple extensions including the primary image and a pixel quality map. Each data file has a detached PDS label (*.lbl). The data format is described in the Software Interface Specifications document.
The index/ directory contains the required PDS index of the files in the data directory, as well as the checksum file. The indxinfo.txt describes the directory contents: