1 / 38

The Sloan Digital Sky Survey ImgCutout: The universe at your fingertips

The Sloan Digital Sky Survey ImgCutout: The universe at your fingertips. Maria A. Nieto-Santisteban nieto@pha.jhu.edu Johns Hopkins University. The Sloan Digital Sky Survey ImgCutout: The universe at your fingertips. 1 TByte astronomical database on the internet.

lotus
Download Presentation

The Sloan Digital Sky Survey ImgCutout: The universe at your fingertips

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. The Sloan Digital Sky Survey ImgCutout: The universe at your fingertips Maria A. Nieto-Santisteban nieto@pha.jhu.edu Johns Hopkins University

  2. The Sloan Digital Sky Survey ImgCutout: The universe at your fingertips • 1 TByte astronomical database on the internet. • Available to professional astronomers & general public. • A photometric and spectral catalog of 100 million objects.

  3. The big picture of the sky

  4. The big picture of the sky • Each tile corresponds to 5 images taken in different wavelengths by the Sloan telescope. • Originally in FITS format, images are "glued" together to create a JPEG mosaic.

  5. The big picture of the sky • Plates show astronomers the boundaries of spectroscopic observations.

  6. The big picture of the sky • Plates show astronomers the boundaries of spectroscopic observations.

  7. The big picture of the sky • Plates show astronomers the boundaries of spectroscopic observations.

  8. The big picture of the sky • Plates show astronomers the boundaries of spectroscopic observations.

  9. The big picture of the sky • Plates show astronomers the boundaries of spectroscopic observations.

  10. The big picture of the sky • Yellow crosses mark spectroscopic Targets.

  11. The big picture of the sky • Yellow crosses mark spectroscopic Targets. • Red squares indicate actual Spectroscopic observations.

  12. The big picture of the sky • Yellow crosses mark spectroscopic Targets. • Red squares indicate actual Spectroscopic observations. • Blue circles point to Photometric observations.

  13. Looking at data quality • 10 - 15 % of the observations are lost due to bad weather, bright stars, satellite trails, meteors, etc.

  14. Looking at data quality • 10 - 15 % of the observations are lost due to bad weather, bright stars, satellite trails, meteors, etc. • Masks delimit such bad areas.

  15. Looking at data quality • 10 - 15 % of the observations are lost due to bad weather, bright stars, satellites trails, meteors, etc. • Masks delimit such bad areas.

  16. Looking at data quality • 10 - 15 % of the observations are lost due to bad weather, bright stars, satellite trails, meteors, etc. • Masks delimit such bad areas.

  17. Looking at data quality Meteor Trail • Astronomers need to identify bad areas in order to improve their science. Bright Source

  18. Looking at known sources • Astronomers can enter a list of coordinates to get an initial view and decide whether or not proceed further.

  19. Looking at known sources Preparing new observations • Finding charts are invaluable tools when observing with a ‘real’ telescope.

  20. Querying the database for new discoveries Find galaxies with specific spectra: Search for quasars: • Users can search for new objects online and get answers in real time.

  21. Querying the database for new discoveries

  22. Querying the database for new discoveries • These three objects might form a previously unknown lensed quasar!

  23. Querying the database for new discoveries • Photometric data? • Background?

  24. Looking in detail • Digging for more information: • Types and magnitudes • Boundaries

  25. Looking in detail • Digging for more information: • Types and magnitudes • Boundaries • Outlines

  26. Looking in detail • Digging for more information: • Types and magnitudes • Boundaries • Outlines • Photometry, Spectro, Cross Identifications and more …

  27. SkyServer • Photometry, Spectro, Cross Identifications and more from SkyServer

  28. SkyServer • Photometry, Spectro, Cross Identifications and more from SkyServer Quasar Spectrum

  29. Exploring the neighborhood • Select objects.

  30. Exploring the neighborhood • Select objects. • Move around: E – W, N – S.

  31. Exploring the neighborhood • Select objects. • Move around: E – W, N – S.

  32. Exploring the neighborhood • Select objects. • Move around: E – W, N – S. • Recenter.

  33. Exploring the neighborhood • Select objects. • Move around: E – W, N – S. • Recenter. • Zoom in & out.

  34. Exploring the neighborhood • Select objects. • Move around: E – W, N – S. • Recenter. • Zoom in & out.

  35. Exploring the neighborhood • Select objects. • Move around: E – W, N – S. • Recenter. • Zoom in & out.

  36. Exploring the neighborhood • Select objects. • Move around: E – W, N – S. • Recenter. • Zoom in & out.

  37. ImgCutout Visual exploration of • the 1 TeraByte SkyServer database, • its 100 million celestial objects, • their images and spectra, • complex spatial relations, boundaries. Enables instantaneous discoveries.

  38. ImgCutout The Universe at your fingertips… Johns Hopkins University http://skyservice.pha.jhu.edu/dr1/ImgCutout/

More Related