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NOTE: Most of the High Level Science Products are unavailable while unscheduled maintenance is being performed. They will be incrementally restored over the course of this week. We apologize for any inconvenience.

EUVE Data Products

The available science data products for the EUVE spectrometers and Deep Survey instrument are stored in two different formats: 1) Binary FITS tables that include time-tagged events for temporal analysis (e.g. light-curves) and 2) 2-D FITS images of the DS and spectrometers. All 4 instruments are stored in a single FITS file with 4 extensions. The reductions that produced the 2-D images are expected to fill the needs of most users, but these can be re-extracted from the FITS tables.

Data Products

  1. EVENTS files (_evt) -- these contain event and monitor data for an observation.
    1. -- these have timing information
    2. -- files have names like ex_hya__0005060614N_evt.fits
  2. IMAGE files (_img) these contain images and filtering data
    1. -- images include DS Lexan (100 Ang) images and 2-D extracted spectra
    2. -- files have names like ex_hya__0005060614N_img.fits

CAVEATS-- EUVE was in a low-earth orbit, but only recorded data during the night time one-third of the orbit. Before March 1995 daytime data was recored for the SW spectrometer. These day-time files are includes in the archive with designation "D" in the file name, as opposed to an "N" for night-time data. EUVE data time because of its greatly increased background is probably only useful for the brightest EUV sources, (like White dwarfs).

In general the 4 binary FITS extensions of the EUVE data are: [1] DS, [2] SW, [3] MW, [4] LW. However, day-time data only has one extension, the SW spectrometer, and in some observations EUVE instruments were turned off to save telemetry slots. In these cases there are less the 4 extensions and all extension move up a slot, i.e.. if the DS was off extension [1] becomes the SW spectrometer.