Observations can be queried by various criteria such as object name, position, instrument, etc. Pipeline products photometric zeropoints must be adjusted to reflect Baltimore, 21904, USA email: European Space Agency email:,. This reduces the area of a plate over which a plate model needs to accurately represent the relationship between measured coordinates and ideal coordinates. Each plate is (artificially) divided into subplates which then can be overlapped. Of electrons/second, which for WFPC2 and NICMOS differs from calibration Astronomical Community Participation Group (STScI) ACS SEARCH Actuator Control System. Space Telescope Science Institute, 3700 San Martin Dr. An expansion of the plate-overlap method of astrometric data reduction to a single plate is proposed. Using MultiDrizzle, are aligned north up, and, except for WFC3, haveīeen astrometrically corrected when possible (for approximately 80% of The ACS, WFPC2, and WFC3, and NICMOS images have been combined The enhanced data products were generated from the standard HST pipeline Extracting spectra from ACS and NICMOS grism data (produced at ST-ECF)Ĭurrently we have enhanced image products for ACS, WFPC2, WFC3, and NICMOS, extracted spectra from NICMOS and ACS grism observations. HST Absolute Astrometry HST is capable of extremely good relave astrometry (0.4 mas with imaging, 0.2 mas with the FSG, 0.03 mas with spaal scanning) However, absolute astrometry has tradiKonally been much less accurate Typical uncertainty 0.Improving absolute astrometry from ~1-2" to ~0.3".Providing more extensive "composite images" (e.g., stacked, color, mosaics) Each astrometry science data set consists of three sets of files (header and binary data)-one for each of the three Fine Guidance Sensors.Putting the data online for immediate access.The goal of the HLA is to optimize science from the Hubble Space Telescope by: The HLA is a joint project of the Space Telescope Science Institute (STScI), the Space Telescope European Coordinating Facility (ST-ECF), and the Canadian Astronomy Data Centre (CADC). The Hubble Legacy Archive (HLA) is designed to optimize science from the Hubble Space Telescope by providing online, enhanced Hubble products and advanced browsing capabilities.
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