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New Frontiers in Astronomy Hubble and Beyond C. A. Christian and A. Conti Space Telescope Science Institute
 
<ul><li>Visible –  Hubble Space Telescope </li></ul><ul><li>Gamma rays -  Compton Gamma Ray Obs. </li></ul><ul><li>X-rays ...
A New Era in Astronomy <ul><li>1960: astronomical data goes digital </li></ul><ul><li>New instruments collect 100s of GB/n...
UDF
Tadpole
 
Egg Nebula
Cat’s Eye
Hodge301/Trantula
Light Echo
 
Sombrero
Sombrero IR
Sombrero composite
Orion Nebula
 
M101
 
Pillars in the Eagle Nebula
Public Outreach Collaborations Astronomical Data & Image Collection Public Info Informal Science News K-14 College/Univ Mu...
Public Data Access <ul><li>Many observatories </li></ul><ul><li>Individual interfaces </li></ul>User Mission A Mission B M...
The Virtual Observatory <ul><li>Data Standards </li></ul><ul><li>Related tools </li></ul>Mission A Mission B Mission C Obs...
Press Release Collection Image Collection Registry:  image collection description NVO Other astronomy registries <ul><ul><...
Image WCS Recovery Press image Find data and select strongest filter detection (R, H  , etc.) Combine several and clean w...
Collaboration: CLEA Virtual Education Observatory <ul><li>Gettysburg College </li></ul><ul><li>Students choose part of sky...
Sloan Digital Sky Interface
NVO Datascope Interface
Hubble Sky Coverage Map
DSS, SDSS, 2MASS, GALEX,…
NASA Data Centers <ul><li>MAST: Multimission Archive at STScI </li></ul><ul><li>HEASARC: High Energy Astrophysics Science ...
The Age of Large Surveys <ul><li>Large number of new surveys </li></ul><ul><ul><li>multi-TB in size, 100 million objects o...
Data Volume <ul><li>Astronomers have ~ Petabytes online now. </li></ul><ul><li>Mine for new or interesting objects in a 40...
International Virtual Observatory Alliance
Data Formats: FITS <ul><li>FITS: Flexible Image Transport System </li></ul><ul><ul><li>Standard astronomical binary data f...
Data Formats: VOTable <ul><li>XML format for tabular information </li></ul><ul><li>Catalog query results </li></ul><ul><li...
World Coordinate System <ul><li>Coordinate Systems:  Galactic, Ecliptic, J2000 Equatorial, B1950 Equatorial </li></ul><ul>...
ZIP Code in the Sky (HTM)
NVO Protocols SOAP Web Services <ul><li>Cone search </li></ul><ul><ul><li>Simple query around a given region </li></ul></u...
Resources <ul><li>Registry </li></ul><ul><ul><li>Collection of resources that users can find </li></ul></ul><ul><ul><li>Re...
 
GALEX SQL Form
Sloan Digital Sky Interface
Challenges <ul><li>41,253 square degrees  2 Trillion pixels </li></ul><ul><li>One wavelength   4 Terabytes </li></ul><ul><...
Contact Information <ul><li>Carol Christian  [email_address] </li></ul><ul><li>Alberto Conti  [email_address] </li></ul>
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Google Techtalk 2006

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Google TechTalk at Google HQ, April 11 2006

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  • Transcript of "Google Techtalk 2006"

    1. 1. New Frontiers in Astronomy Hubble and Beyond C. A. Christian and A. Conti Space Telescope Science Institute
    2. 3. <ul><li>Visible – Hubble Space Telescope </li></ul><ul><li>Gamma rays - Compton Gamma Ray Obs. </li></ul><ul><li>X-rays - Chandra X-ray Observatory </li></ul><ul><li>Infrared - Spitzer Space Telescope </li></ul>
    3. 4. A New Era in Astronomy <ul><li>1960: astronomical data goes digital </li></ul><ul><li>New instruments collect 100s of GB/night </li></ul><ul><li>Detectors follow Moore’s law </li></ul><ul><li>Data avalanche: double every 2 years </li></ul>Growth over 25 years is a factor of 30 in collecting area, 3000 in pixels. Courtesy of Alex Szalay CCD area mpixels 3+ M telescopes area m^2
    4. 5. UDF
    5. 6. Tadpole
    6. 8. Egg Nebula
    7. 9. Cat’s Eye
    8. 10. Hodge301/Trantula
    9. 11. Light Echo
    10. 13. Sombrero
    11. 14. Sombrero IR
    12. 15. Sombrero composite
    13. 16. Orion Nebula
    14. 18. M101
    15. 20. Pillars in the Eagle Nebula
    16. 21. Public Outreach Collaborations Astronomical Data & Image Collection Public Info Informal Science News K-14 College/Univ Museums/ Planetaria
    17. 22. Public Data Access <ul><li>Many observatories </li></ul><ul><li>Individual interfaces </li></ul>User Mission A Mission B Mission C Observatory X Observatory Y
    18. 23. The Virtual Observatory <ul><li>Data Standards </li></ul><ul><li>Related tools </li></ul>Mission A Mission B Mission C Observatory X Observatory Y User VO
    19. 24. Press Release Collection Image Collection Registry: image collection description NVO Other astronomy registries <ul><ul><li>Protocol: NVO simple access image protocol </li></ul></ul>Recover coordinates Traceback to original data Automate process
    20. 25. Image WCS Recovery Press image Find data and select strongest filter detection (R, H  , etc.) Combine several and clean wcs.compute uses identified objects in each image Voila - WCS! Backup slide
    21. 26. Collaboration: CLEA Virtual Education Observatory <ul><li>Gettysburg College </li></ul><ul><li>Students choose part of sky to “observe” </li></ul><ul><li>Collect data from telescope/ instrument </li></ul><ul><li>Perform simple photometric data analysis </li></ul>
    22. 27. Sloan Digital Sky Interface
    23. 28. NVO Datascope Interface
    24. 29. Hubble Sky Coverage Map
    25. 30. DSS, SDSS, 2MASS, GALEX,…
    26. 31. NASA Data Centers <ul><li>MAST: Multimission Archive at STScI </li></ul><ul><li>HEASARC: High Energy Astrophysics Science Archive Research Center </li></ul><ul><li>IRSA: Infrared Science Archives </li></ul><ul><li>LAMBDA: Legacy Archive for Microwave Background Data Analysis </li></ul><ul><li>MSC: Michelson Science Center </li></ul><ul><li>NASA ADS: Astrophysics Data System </li></ul><ul><li>NED: NASA Extragalactic Database </li></ul>
    27. 32. The Age of Large Surveys <ul><li>Large number of new surveys </li></ul><ul><ul><li>multi-TB in size, 100 million objects or more </li></ul></ul><ul><ul><li>individual archives planned, or under way </li></ul></ul><ul><ul><li>Data publication an integral part of the survey </li></ul></ul><ul><li>Multi-wavelength view of the sky </li></ul><ul><li>Impressive early discoveries </li></ul>
    28. 33. Data Volume <ul><li>Astronomers have ~ Petabytes online now. </li></ul><ul><li>Mine for new or interesting objects in a 400-D space </li></ul><ul><ul><li>Positions, brightness, color, type, size, etc… </li></ul></ul><ul><li>Data doubles every 2 years </li></ul><ul><li>Publishing data </li></ul><ul><li>Providing good visualization and query tools </li></ul>
    29. 34. International Virtual Observatory Alliance
    30. 35. Data Formats: FITS <ul><li>FITS: Flexible Image Transport System </li></ul><ul><ul><li>Standard astronomical binary data format </li></ul></ul><ul><li>Composed of a sequence of Header Data Units (HDUs) </li></ul><ul><li>keyword=value statements, describe the organization of the data in the HDU and the format of the contents </li></ul><ul><li>HDU may contain a digital image, tables and multidimensional matrices </li></ul>
    31. 36. Data Formats: VOTable <ul><li>XML format for tabular information </li></ul><ul><li>Catalog query results </li></ul><ul><li>List of images or spectra </li></ul><ul><li>List of resources </li></ul>
    32. 37. World Coordinate System <ul><li>Coordinate Systems: Galactic, Ecliptic, J2000 Equatorial, B1950 Equatorial </li></ul><ul><li>WCS Projections: LIN, TAN, SIN, STG, AZP, ARC, ZPN, ZEA, AIR, CYP, CAR, MER, CEA, COP, COD, COE, COO, BON, PCO, SFL, PAR, AIT, MOL, CSC, TSC, DSS, PLT </li></ul>
    33. 38. ZIP Code in the Sky (HTM)
    34. 39. NVO Protocols SOAP Web Services <ul><li>Cone search </li></ul><ul><ul><li>Simple query around a given region </li></ul></ul><ul><li>Simple image access </li></ul><ul><ul><li>Create an image of this region. </li></ul></ul><ul><ul><li>First step produces VOTables with links to image </li></ul></ul><ul><ul><li>User downloads images as FITS in second stage </li></ul></ul><ul><li>SkyNode </li></ul><ul><ul><li>Sophisticated access to tables </li></ul></ul><ul><ul><li>Supports distributed queries </li></ul></ul><ul><ul><li>Uses ADQL </li></ul></ul><ul><ul><li>Should eventually subsume Cone-search </li></ul></ul>
    35. 40. Resources <ul><li>Registry </li></ul><ul><ul><li>Collection of resources that users can find </li></ul></ul><ul><ul><li>Registry-registry communication via OAI </li></ul></ul><ul><ul><li>Some publishing registries are meant to be seen only by other registries </li></ul></ul>
    36. 42. GALEX SQL Form
    37. 43. Sloan Digital Sky Interface
    38. 44. Challenges <ul><li>41,253 square degrees 2 Trillion pixels </li></ul><ul><li>One wavelength 4 Terabytes </li></ul><ul><li>Multi-wavelength 10-100 Terabytes </li></ul><ul><li>Time dimension 10 Petabytes </li></ul><ul><li>Hard to publish data & programs </li></ul><ul><li>Hard to find/understand data & programs </li></ul><ul><li>New analysis & visualization tools are required </li></ul><ul><li>Transition to the new astronomy </li></ul><ul><ul><li>Sociological issues </li></ul></ul>
    39. 45. Contact Information <ul><li>Carol Christian [email_address] </li></ul><ul><li>Alberto Conti [email_address] </li></ul>
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