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FUSE Search Results Help
This page describes the output columns on the FUSE Search Results page. For information about FUSE and its data, see the FUSE homepage at http://fuse.pha.jhu.edu/.
Use the FUSE Science Search form to locate and retrieve observations from the FUSE data archive at STScI. Both public and proprietary data may be retrieved through this interface.
The FUSE Science Search form offers a view of FUSE observations, which comprise one or more exposures. To locate individual exposures, use the FUSE Exposures Search page. More information about retrieving FUSE data may be found on the FUSE retrieval help page.
General Results Options
Most mission search results pages have the following general features/options. (Note that the sorting, paging and VOPlot options all require JAVASCRIPT to be supported and turned on, and the interactive plotting option uses HTML5 which is not supported in Internet Explorer before version 9.)
- Clicking on the column headings at the TOP of the
results table will sort the returned results based on the selected
field. Clicking the column heading a second time will sort the
results in descending order. As of August, 2014 sorting is now
possible with RA and Dec coordinates in sexigesimal notation,
and the previous bugs
whereby exponents are ignored in numbers using exponential notation
(e.g., 6.3E-3 is sorted as if it were 6.3), and signs were
ignored in floating point numbers have both been corrected.
Note however
that the sort functions (like many interactive features)
are written in javascript which is not always supported in older
browsers.
Alternatively, selecting the sort options in the initial query
does not depend on javascript,
and will sort the entire search result, not just the displayed
rows.
- Clicking one of the column headings
at the END of the results table (or clicking the
"columns help" link at the top of the page) will display
help information about the search results page and the displayed
columns (i.e., this page).
- By default, results are shown with 500 entries per page, with links
to additional pages if more than 500 entries were returned. The number of
rows per page can be modified using the "Records per Page" form element
on the search form. The total number
of entries returned is set by the "Maximum Records" value from the search page.
- One numerical column can be plotted versus another using VOPlot
although see the Help page regarding issues
with the latest version of Java.
- For some missions, thumbnail images of the returned entries
can be displayed by clicking the link listed just below the VOPlot link.
- The mark column, as described below, can be used to plot spectra and download files. Plots are now interactive with added features.
Column Information
- Mark
- Mark this dataset for retrieval by pressing this checkbox.
After you have marked for retrieval all the datasets that you're interested in,
hit the Retrieve Marked Datasets for Retrieval button to initiate the retrieval.
Proprietary datasets will have a @ character next to their mark buttons (and in some browsers will show up with a yellow background). Proprietary datasets can be marked and retrieved by appropriately authorized users. If you are a principal investigator and would like to retrieve your data (or would like to authorize one of your co-investigators to retrieve your data), contact us at archive@stsci.edu.
Users running Javascript-enabled browsers will see some buttons at the top and bottom of the search results labelled Mark all, Unmark all, etc. These buttons may be used to mark or unmark all of the datasets in the search results; mark or unmark only the proprietary datasets; or mark or unmark only the public datasets.
- Target name as stated in proposal.
- The equatorial right ascension of the target, in equinox J2000.
- The equatorial declination of the target, in equinox J2000.
- Name of an individual exposure within an observation set (i.e., same as FITS header keyword ROOTNAME) Also referred to as the Exposure ID on the exposure search form.
- The Observation name is the unique identifier for a FUSE observation. (For FUSE, an observation is an association of exposures.) In the FUSE Observation search the Observation Name is the Data ID. This is the same as the association ID also.
- The name of the FUSE Preview, where a preview exists. Where no preview exists the value is null. The preview name is the same as the Observation Name.
- observation ID from proposal database
- Unique identifier assigned to association or observations.
- target aperture (PINH, HIRS, MDRS, LWRS, RFPT)
- LWRS (30"x30"; 100% throughput)
- MDRS (4"x20"; 98% throughput)
- HIRS (1.25"x20"; 85% throughput)
- PINH (Pin hole - hasn't been used as of 9/24/2002)
- RFPT Used either for instrumental test programs, or when long background observations are made. The latter are tagged with a target name, but since the target is at the reference point, its light is not entering the spectrograph through one of the science apertures.
- The number of referred journal articles using this observation. Click on the number to see the list of articles.
- position angle of y axis (deg. E of N)
- bandwidth of the data (Angstroms)
- central wavelength of the observation (Angstroms)
- Date and time of start of observation
- color excess E(B-V)
- ecliptic latitude (deg)
- ecliptic longitude (deg)
- galactic latitude (deg)
- galactic longitude (deg)
- high proper motion target (T or F)
- [F]ixed or [M]oving target
- object class (modified IUE classification).
Also called Object Class.- observation end time
- observation start time
- exposure duration (seconds)--calculated
- Science Data Processing observation status code(?)
- First name of principal investigator.
- Last name of principal investigator.
- observation ID from data header
- MK spectral type and luminosity class
- [P]oint, [E]xtended, [C]ontinuum, [E]mission line
- Not currently used.
- Target ID from data header
- Telescope (Always FUSE).
- target V magnitude
- minimum wavelength of the observation (Angstroms)
- maximum wavelength of the observation (Angstroms)
- Radial Velocity (z value)
- The DADS archive class (FUS for calibrated data, FEN for engineering data ).
- The date the processed data was archived in DADS.
- The date the processed data was generated.
- actual target aperture (PINH, HIRS, MDRS, LWRS)
- detector mask used
- exposure end time (as opposed to observation end time)
- condition that ended exposure (ENDO; SAA; OCC; NGHT; ENDE)
- exposure start time (as opposed to observation start time)
- exposure duration (seconds)--calculated (Note this is different from the "Exposure time" field which describes the total exposure time for the entire observation.)
- exposure ID from data header
- Science Data Processing status (0=good)
- binsize used for pixel binning in FES images (1;2;4;8)
- FES filter wheel position (CLR=Clear, COL=color, ND=Neutral Density, DEF=)
- FES target position: IN or OUT
- FPA1 LiF X position
- FPA1 SiC X position
- FPA2 LiF X position
- FPA2 SiC X position
- Number of FP split positions
- internal calibration (STIM or NONE)
- Roll offset (deg)
- SIA table name (SIAHIRS1X8, SIALWRS1X8, SIAMDRS1X8)
- Binsize in detector X coordinate for HIST mode
- Binsize in detector Y coordinate for HIST mode
- target acquisition sequence
- program ID from data header. Values range from Annn to Znnn.
- Total count rate (counts/s)
- time marker insertion period for TTAG data
- Instrument Mode
The FUSE instrument has a simple design with few observing modes. The correct mode of observing is generally derived from the Phase 2 proposal information (based on target flux and the desired S/N and spectral resolution) for event rates < 2500 counts/sec (corresponding to a flat spectrum source with flux of ~8 × 10-12 erg cm-2 sec-1 Å-1 in the LWRS aperture), TTAG mode is the default observing mode. For rates higher than this, spectral image (HIST) mode is used by default . For more information see the The FUSE Observer's Guide section on Observing Modes.
- FUSE data has a nominal proprietary period of six months (though in special cases, this may be shortened or extended). The Release Date field gives the end of the dataset's proprietary period.
When the results of a search query are displayed, both public and proprietary datasets will have mark buttons. Proprietary datasets will have an at symbol, @, next to the mark button, and on most browsers, the background for proprietary mark buttons will be yellow. Properly authorized users will be able to retrieve proprietary data through the Web interface.
- Target name as stated in proposal.
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