Post on 29-Jun-2020
Lisa M. FrattareSpace Telescope Science Institute
Advanced Imaging ConferenceNovember 12, 2005San Jose, CA
The Hubble Space TelescopeThe Hubble Space Telescope
Lisa M. FrattareSpace Telescope Science Institute
Advanced Imaging ConferenceNovember 12, 2005San Jose, CA
Lisa M. FrattareSpace Telescope Science Institute
Advanced Imaging ConferenceNovember 12, 2005San Jose, CA
Lisa M. FrattareSpace Telescope Science InstituteBaltimore, Maryland
Advanced Imaging ConferenceNovember 12, 2005San Jose, CA
Common Optical Data Artifacts
• Pixel artifacts• Diffraction spikes• Mosaic chip seams/gaps• Noise• Sky background mismatch
Telescope:Telescope:� Deployed April 25, 1990� Designed to last 15 yrs � 8-foot-diameter mirror� 386/486 processor
Orbit:Orbit:� 380 miles above Earth� Full Earth orbit in 97 minutes� Travels at 5 miles per second (NY-LA in 10min)� Earth-occultation leaves ~45 minutes of viewing
Ring Nebula M57
• STScI-PRC99-01
Above EarthAbove Earth’’ssatmosphere:atmosphere: � Always night
� No weather�No distortion�No absorption
Remote:Remote:� Hard to repair/upgrade(expensive & risky)
HST Field of View
Fine Guidance Sensors check for movement 40 times a second!
Fine-guidanceSensors (Tracking)
STIS (spectra) RIP
WFPC2ACS (imagers)NICMOS
Near-IR
HST FOVHST FOV
M16
Wide Field Planetary Camera 2Wide Field Planetary Camera 23 3 -- 800x800px @ 0.1800x800px @ 0.1””/px/px1 1 -- 800x800px @0.05800x800px @0.05””/px/pxChevron Shape Chevron Shape -- $$$$$$
HorseheadWFPC2WFPC2-- 1993 1993 -- presentpresent-- MosaicsMosaics are possible are possible
Broad and Narrow FiltersBroad and Narrow Filters-- HHαααααααα, [N II], [O III], [O I],, [N II], [O III], [O I], [S II][S II]
Sombrero Galaxy M104
Wide Field Camera- Pair of 8-megapixel CCDs= 2048x2048px @ 0.05”/px (chip gap)- Near UV � Optical � near IR - Broad-band, narrow-band filters, no [S II]- Excellent for mosaics; galaxies
Advanced Camera for Surveys
Mars
• STScI-PRC98-08d
ACS: High Resolution CameraACS: High Resolution Camera-- single 1024x1024px@0.025single 1024x1024px@0.025””/px/px-- removable occulting masksremovable occulting masks-- nonnon--removable occulting fingerremovable occulting finger
NGC 4414
Releasing an image a month since 1998Drive is aesthetics in addition to scienceSmall allotment of orbits yearly
Hubble Heritage ProjectHubble Heritage Project
http://heritage.stsci.edu
Since 1990: Hubble FactsSince 1990: Hubble Facts from 15th Anniversary April 2005from 15th Anniversary April 2005
- 700,000 exposures taken - probed more than 22,000 celestial objects- completed 88,000 orbits (equaling 2.3 billion miles)
(400,000 x NY�LA distance)
- accumulated 23 terabytes of data - generates 15 gigabytes daily- used by 3,900 astronomers internationally- 4,000 scientific papers on
Hubble results
Time is awarded via a yearlyPeer-Review process. Roughly1,500 proposals are submittedfor both imaging and spectral data,with roughly a 1/3 acceptance rate.
KeyholeCurrent Status of HubbleVoluntary 2-gyro modeRecent loss of STIS spectrographBatteries/gyro failures expected
Servicing Mission 4Batteries/gyrosWide Field CameraCosmic Origins Spectrograph“Three shuttle missions away”
Current Status of HubbleVoluntary 2-gyro modeRecent loss of STIS spectrographBatteries/gyro failures expected
Servicing Mission 4Batteries/gyrosWide Field CameraCosmic Origins Spectrograph“Three shuttle missions away”