MAST - The Barbara A. Mikulski Archive for Space Telescopes

MAST - The Barbara A. Mikulski Archive for Space Telescopes MAST is an archive of data from a variety of astronomical telescopes. Also follow us on Twitter: https://twitter.com/MAST_News Congressional history.

The Space Telescope Science Institute (STScI) was already operating an efficient archive for distribution of the Hubble Space Telescope data in 1997, when the International Ultraviolet Explorer mission ended and NASA began to search for a permanent home for the IUE data archive. The clear synergy between HST and IUE science made it logical to combine the data into a single archive. Soon thereafter

NASA made STScI the archive center for data from similar space-based missions with data in the Ultraviolet/Optical/Near-IR range. The name Multimission Archive at STScI (MAST) was chosen to convey that the broader focus of the extended archive. On April 5, 2012, the archive was named the Barbara A. Mikulski Archive for Space Telescopes (MAST) to honor Senator Mikulski for her career-long achievements and becoming the longest-serving woman in U.S.

08/19/2026

HLSP Announcement: QLP Sectors 99-104 currently suffer from a barycentric timing correction error, which was identified starting in Orbit 210 through Orbit 220. For more details, please visit the QLP homepage, which will be updated as products are replaced. https://archive.stsci.edu/hlsp/qlp

HLSP Update: QLP calibrated light curves from TESS full frame images for Sector 104 are now available at MAST. This Sect...
08/03/2026

HLSP Update: QLP calibrated light curves from TESS full frame images for Sector 104 are now available at MAST. This Sector adds 1,152,719 targets derived from 200 second cadence FFIs. https://archive.stsci.edu/hlsp/qlp

New HLSP: Terry Hubble Observations of Roman (THOR) early-release catalog of point sources in the Roman Galactic Bulge T...
07/30/2026

New HLSP: Terry Hubble Observations of Roman (THOR) early-release catalog of point sources in the Roman Galactic Bulge Time Domain Survey footprint. Multi-passband photometry and astrometry (ACS+WFC3, F606W+F814W) cross-matched to HST-WFC3IR and Gaia DR3 where available. https://archive.stsci.edu/hlsp/thor

HLSP Update: JWSTSTARS adds epoch photometry for the RR Lyrae population in WLM, and pulsation parameters for sources cr...
07/23/2026

HLSP Update: JWSTSTARS adds epoch photometry for the RR Lyrae population in WLM, and pulsation parameters for sources cross-matched with HST data. These include pulsation type; HST-derived periods; filter-wise amplitudes and mean magnitudes in F090W and F150W. https://archive.stsci.edu/hlsp/jwststars

HLSP Update: TESS-SPOC calibrated light curves and target pixel files from TESS full frame images for Sector 85 are now ...
07/23/2026

HLSP Update: TESS-SPOC calibrated light curves and target pixel files from TESS full frame images for Sector 85 are now available at MAST. This Sector adds 159,996 targets derived from 200 second cadence FFIs. https://archive.stsci.edu/hlsp/tess-spoc

HLSP Update: QLP calibrated light curves from TESS full frame images for Sector 103 are now available at MAST. This Sect...
07/20/2026

HLSP Update: QLP calibrated light curves from TESS full frame images for Sector 103 are now available at MAST. This Sector adds 1,722,931 targets derived from 200 second cadence FFIs. https://archive.stsci.edu/hlsp/qlp

HLSP Update: QLP calibrated light curves from TESS full frame images for Sector 102 are now available at MAST. This Sect...
07/17/2026

HLSP Update: QLP calibrated light curves from TESS full frame images for Sector 102 are now available at MAST. This Sector adds 1,768,856 targets derived from 200 second cadence FFIs. https://archive.stsci.edu/hlsp/qlp

HLSP Update: TESS-SPOC calibrated light curves and target pixel files from TESS full frame images for the "Comet 3I" Sec...
06/26/2026

HLSP Update: TESS-SPOC calibrated light curves and target pixel files from TESS full frame images for the "Comet 3I" Sector 1751 are now available at MAST. This Sector adds 159,993 targets derived from 200 second cadence FFIs. https://archive.stsci.edu/hlsp/tess-spoc

HLSP Update: PHANGS-CAT has built an integrated dataset for multi-phase, multi-scale studies of star formation. Data Rel...
06/12/2026

HLSP Update: PHANGS-CAT has built an integrated dataset for multi-phase, multi-scale studies of star formation. Data Release 5 (DR5) provides HST photometry with improved estimates of age, mass, and reddening, across the full sample of 38 PHANGS-HST spiral galaxies. https://archive.stsci.edu/hlsp/phangs/phangs-cat

New HLSP: TARS provides systematics-corrected light curves and Lomb-Scargle periodograms for 39 million star-sector comb...
06/04/2026

New HLSP: TARS provides systematics-corrected light curves and Lomb-Scargle periodograms for 39 million star-sector combinations (7.5 million unique stars) observed by TESS between Sectors 1 and 96. This dataset was used to measure rotation periods from >1 million stars. https://archive.stsci.edu/hlsp/tars

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