HSTAEC - HST Archived Exposures Catalog
This is the Hubble Space Telescope (HST) Archived Exposures Catalog (AEC)
as obtained from the Space Telescope Science Institute (STScI) Archive, where
it was created from a compilation of their Archive and Proposal databases.
This database provides a summary of all completed HST observations, including
both solar system and fixed (i.e., cosmic) targets. Exposures are included
here after they have been archived at STScI. Notice that solar system objects
ahould be searched for by name, not by position. Much more information can be
obtained about each exposure, and the data themselves can be retrieved using
STScI's Multimission Archive (the URL is http://archive.stsci.edu/hst/) or
STScI's Archive Web Interface (the URL is
http://archive.stsci.edu/hst/search.php). This HEASARC version of the HSTAEC is
updated on a monthly basis, based on data files obtained from the STScI Web
site each month.
Note that when the HEASARC ingested this catalog, (i) a number of entries
were found with missing or null positional co-ordinates, i.e., RA and Dec
values, which we have set to be at (RA, Dec) = (0,0) in equinox J2000, and
(ii) 186 entries were found with clearly erroneous observation dates, e.g.,
Nov 17 1858, which the HEASARC has changed to null values.
The original data files can be downloaded from the STScI Hubble Data Archive
(HDA) at http://archive.stsci.edu/hst/aec.html.
This database table is recreated by the HEASARC on a monthly basis using the
latest AEC data files obtained from the STScI Hubble Data Archive (HDA) at
The single data product associated with the entries in this table is
a GIF preview file available at the Space Telescope Science Institute
HST Archive for which the HEASARC provides a link.
The name of the target.
The right ascension of the target in the default equinox.
The declination of the target in the default equinox.
The galactic longitude of the target.
The galactic latitude of the target.
The V3 position angle during the observation, in degrees. To compute
the u3 roll angle from v3, simply add 180 degrees to it.
The field of view (FOV) configuration.
The instrument configuration.
The instrument operating mode.
The apertures used. Multiple apertures are delimited by semicolons.
The spectral elements used. Multiple elements are
delimited by semicolons.
The "central" wavelength of the observation, in Angstroms (AA).
A flag indicating whether corrective optics were used (i.e., COSTAR,
WFPC2), where 'T' means that they were and 'F' means that they were not.
The length of the exposure time, in seconds.
The proposal ID.
The dataset name: this uniquely identifies the data for
a given exposure.
The date on which the observation was made.
(Note: There were 186 erroneous entrees of "Nov 17 1858 12:00AM"
for this parameter. These erroneous dates were changed to null values).
The date on which the observation becomes/became public.
Questions regarding the HSTAEC database table can be addressed to the
HEASARC User Hotline.
If you have any problems, please consult the help
page or mail firstname.lastname@example.org