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NASA’s Great Observatories “an astronomical Mount Rushmore” Spitzer Chandra Compton Hubble.

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Presentation on theme: "NASA’s Great Observatories “an astronomical Mount Rushmore” Spitzer Chandra Compton Hubble."— Presentation transcript:

1 NASA’s Great Observatories “an astronomical Mount Rushmore” Spitzer Chandra Compton Hubble

2 Gains in orbit No atmospheric blurring Wider accessible wavelength range Instrumental stability No clouds/daylight (timing)

3 HUBBLE Past …future?

4 Some HST Science highlights Structures of distant galaxies

5 Some HST Science highlights Structures of distant galaxies Hubble constant from Cepheid variable stars

6 Some HST Science highlights Structures of distant galaxies Hubble constant from Cepheid variable stars Black holes in (almost all) galactic nuclei

7 Some HST Science highlights Structures of distant galaxies Hubble constant from Cepheid variable stars Black holes in (almost all) galactic nuclei Protoplanetary material near young stars

8 Some HST Science highlights Structures of distant galaxies Hubble constant from Cepheid variable stars Black holes in (almost all) galactic nuclei Protoplanetary material near young stars Gravitational lenses

9 Some HST Science highlights Structures of distant galaxies Hubble constant from Cepheid variable stars Black holes in (almost all) galactic nuclei Protoplanetary material near young stars Gravitational lenses Intergalactic gas and its history Stuff scattered all the way through the textbooks

10 Supernova progenitor in M51

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12 (Li et al. in press)

13 Gravitational microlensing in NGC 3314

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15 Instrument history 1990: FGS HSP FOS GHRS FOC WF/PC 1993: FGS CoSTAR FOS GHRS FOC WFPC2 1997: FGS CoSTAR NICMOS STIS FOC WFPC2 2002: FGS CoSTAR NICMOS STIS ACS WFPC2 200? COS, WFC3

16 Hubble status, August 2005 Space Telescope Imaging Spectrograph dead (only high-res/small-region spectrometer) 3 of 6 gyros (RSUs) functional (3 normally needed, 2- gyro mode successful in tests) Battery capacity decreasing (will be useless circa 2010) Estimated 50% failure time on above: 2007 Instrument/transmitter power cycling now reduced by rescheduling/eliminating parallel imaging

17 UPDATE 31 AUG 05 – 2 GYROS DAILY REPORT # 3934 PERIOD COVERED: UT August 29, 2005 (DOY 241) All commanding for the transition to Two Gyro Science mode was successful. Commanding included modifying control law gains for T2G, loading FSW support files for TGS, modifying +D SPA commanding in new TGS safemode macros, transitioning to TGS mode, and performing a full RAM dump. Transition to TGS mode took place at 241/0217. The first FGS guide acquisition at 0812 was successful, as have all subsequent acquisitions. Jitter in F2G (FGS/2 Gyro mode) was measured at approximately 3 milliarcseconds. All three acquisitions performed have been successful with no LOL.

18 Options Shuttle SM4 (O’Keefe ruled out, CAIB concerns, Griffin optimistic) Replace the whole thing (HOP proposal to refly COS/WFC3)

19 Shuttle? “Safe haven” would mean standby orbiter Limited remaining flights earmarked to ISS Need for independent orbital inspection Victim of the Vision? Orbital mechanics: 28.5-degree inclination, getting heaviest payloads highest from Cape Canaveral, restricts options now

20 Servicing non-options Prohibitive energy requirements to co-orbit with ISS in reach of astronauts 28-degree orbit out of reach from Baikonur (ITAR restrictions aside) Ion thrusters would take the estimated telescope lifetime for orbit change ~2015-30 estimated deorbit without boosting

21 Replace capabilities? Technology since 1980: lots cheaper. Thin flexible mirrors, lightweight structures, stabilize mirrors rather than structure… Unique access to optical/UV range Plan on table to fly 2.4m mirror with existing HST instruments (Hubble Origins Probe or HOP); could be as low as $250M. Need to decide who gets the instruments!

22 Final servicing status Current policy: do not preclude Depends on next (2?) STS flight results COS, WFC3, STIS repair, batteries, gyros Deorbit module status unclear Target: late 2007

23 Next up: JWST

24 James Webb Space Telescope Launch 2011, on Ariane V, to L2 region 6.5m deployable primary 0.6-20 microns (far red to mid-IR) Key problems: formation of galaxies, first stars, maybe planets Spacecraft weight/mirror area ratio roughly that of Hubble mirror alone!

25 Compton Gamma-Ray Observatory

26 Deployed April 1991 by Atlantis crew. Deorbited mid-2000. Distribution, distance of gamma-ray bursts Gamma-ray blazars, relativistic beaming Microquasars Radioisotopes in interstellar medium Successors: Swift, INTEGRAL, GLAST

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28 And at other wavelengths… Chandra and its complement XMM-Newton

29 The galactic-center black hole and its attendants

30 Hot gas between galaxies

31 The chemistry of a supernova

32 Fireball impact in Supernova 1987A

33 The history of black holes – a Chandra deep field

34 Spitzer Space Telescope

35 Warm launch, radiative cooling Cryogen management, 2 years of 5+ so far Earth-trailing heliocentric orbit 2 cameras, 2 spectrographs, 3.6-160  m

36 Temperatures of extrasolar planets Direct detection of IR from two “hot Jupiters” during eclipses, two wavelengths give temperature estimates

37 Looking into dusty star cradles

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40 Across the spectrum - now FarIR MidIR nearIR opt UV farUV X-ray gamma Spitzer Hubble Chandra GALEX FUSE INTEGRAL WMAP

41 Multispectral Greatest Hits Intergalactic gas Starburst galaxies High-redshift galaxies Evaporating planets Protoplanetary disks Growth of black holes Complexity of stardeath Gamma-ray bursts Supernova chemistry Quasar jets Stripped galaxies Pregalactic lumps Galaxy history Relativistic jets

42 A panchromatic view - spiral galaxy M81 ROSAT GALEX Kitt Peak Spitzer VLA

43 Across the spectrum - soon FarIR MidIR nearIR opt UV farUV X-ray gamma Spitzer Hubble? Chandra and XMM GALEX? FUSE? INTEGRAL Planck Herschel Swift SIM TPF? JWST

44 A new Universe to explore The full electromagnetic spectrum Open international competition for observations Public data archives (without mailing tapes!) The beginnings of the Virtual Observatory But astronomers think about facilities differently from NASA and ESA…


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