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Mission Overview

Map of Observations

mission wavelength

Wavelength Coverage

mission coverage

The Hopkins Ultraviolet Telescope (HUT) was a 0.9 meter telescope with a prime focus far-ultraviolet spectrograph that was used to observe the 912-1850 Å spectral region at a resolution of ~3 Å. A few sources were also observed in the 415-912 Å (2nd-order) region with 1.5 Å resolution. HUT was built by scientists and engineers at the Johns Hopkins University and was one of three ultraviolet telescopes that flew twice on the space shuttle as a dedicated Spacelab astronomy payload.

The HUT data archive was replaced with reprocessed data, and all data set names were changed. All MAST pages describing the HUT data have been updated accordingly. All searches now run on, and retrieve, these new data products. For complete details of the updated pipeline and new data format, see Dixon et al. PASP, 2013. You can also download a static tarball of pre-2013 data. This is the only way to retrieve the pre-2013 data at MAST, and we will no longer be supporting it. You can also download the calibrated, 1st-order spectra of the white dwarfs G191-B2B and HZ 43 from Kruk et al. 1997, ApJ, 482, 546, where the 2nd-order fluxes have been removed.

The Astro-1 mission flew on the space shuttle Columbia during 2-10 December 1990, and obtained spectro-photometric observations of 90 targets. The Astro-2 mission flew on the space shuttle Endeavour from 3-17 March 1995, where HUT was used to obtain observations of 275 targets. Because of upgrades to HUT between the missions, the instrument was approximately twice as sensitive during the Astro-2 mission.

Active From

Flight 1: December 2 -  December 11, 1990

Flight 2: March 2 - March 18, 1995


R~150 (1st order), R~330 (2nd order)


  • Spectroscopy
  • Time Series Observations
  • (Guider) Images


Search Tools

Featured Data Products

All Data Products

Extracted Spectra: Extracted, calibrated spectrum derived from the photon list.

Time-Tagged Photon Lists: Time-tagged photon list containing X coordinate and arrival time of each photon within the observation.

TV Guider Images: Guider images of the target's field.

HUT Images


Astro-1 Telescopes in Payload Bay
Astro-2 Telescopes in Payload Bay

Supplemental Links