Archive contents

The HST archive at ESAC/ESA contains data from the following Hubble collections and catalogues:

Details on the collections and catalogues are given below. Please note that the Hubble Legacy Archive (HLA) collection will be added again very soon, we apologise for any inconvenience.

The HST Collection

The HST collection in the eHST is the standard HST archive content and contains the following:

  • All public (non-proprietary) HST data.
  • The standard HST archive products from the active instruments (ACS, COS, STIS, WFC3).
  • Data from legacy instruments (FOC, FOS, HRS, NICMOS, WFPC, WFPC2). These data have gone through a final calibration run and are not foreseen to change anymore.

Detailed information on the data produced by each instrument aboard the Hubble Space Telescope can be found in the official HST Data Handbooks.

Hubble Source Catalog (HSC)

The Hubble Source Catalog is a combination of all the visit-based source lists in the Hubble Legacy Archive (HLA) into a single catalogue. It contains about 80 million detections of 30 million objects, involving 112 different detector/filter combinations, and about 160,000 HST exposures. Source lists from the Data Release 8 of the Hubble Legacy Archive (HLA) are matched using an algorithm developed by Budávari & Ludow (2012). The mean photometric accuracy is better than 0.10 mag, with relative accuracies as good as 0.02 in certain cases. The relative astrometric residuals are typically within 10 mas, and the absolute astrometric accuracy is better than about 0.1 arcsec for most sources.

HSC data provenance
Instrument Number of filters Number of sources Number of detections Retrieval date
WFPC2 38 29,146 13 × 106 2009/05/11
ACS/WFC 12 9,021 21 × 106 2011/02/16
WFC3/UVIS 47 4,772 31 × 106 2014/06/01
WFC3/IR 15 6,763 14 × 106 2014/06/01
All 112 49,702 79 × 106 -


Version 2 includes (see here for more details):

  • Four additional years of ACS source lists (i.e., through June 9, 2015). All ACS source lists go deeper than in version 1. See current HLA holdings for details.
  • One additional year of WFC3 source lists (i.e., through June 9, 2015).
  • Cross-matching between HSC sources and spectroscopic COS, FOS, and GHRS observations.