1 / 14

A brief introduction of SDSS II data

A brief introduction of SDSS II data. Liu Chengze Shanghai Astronomical Observatory. SDSS I: April 2000~June 2005 EDR-DR5 SDSS II: July 2005~2008 Legacy Survey Sloan Extension for Galactic Understanding and Exploration (SEGUE) Supernova Survey. Legacy Survey.

dillon-mcconnell
Download Presentation

A brief introduction of SDSS II data

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. A brief introduction of SDSS II data Liu Chengze Shanghai Astronomical Observatory

  2. SDSS I: April 2000~June 2005 • EDR-DR5 • SDSS II: July 2005~2008 • Legacy Survey • Sloan Extension for Galactic Understanding and Exploration (SEGUE) • Supernova Survey

  3. Legacy Survey • 7,500 square degrees Northern Sky • 740 square degrees Southern Galactic Cap • spectra of 860,000 galaxies and 105,000 quasars.

  4. SEGUE • map the structure of the Milky Way Galaxy. • 3,500 square degrees of new imaging: • some on a regular grid through the Galactic Plane • some sampling structures like the Sagittarius Dwarf Tidal Stream. • 240,000 star spectra(400 plates) • WD; A/BHB; G; KG; LM; AGB; MK; MD; CWD: Cool White Dwarf; FSD: F turnoff and sub-dwarf star • known open cluster; Sag. dwarf stream; Monoceros Ring structure

  5. SEGUE

  6. Black lines: SDSS regular imaging. Red line: Sagittarius dwarf tidal stream Magenta lines: Monoceros dwarf tidal stream ( cross M31.) Blue circles: Galactic structure plate pairs Yellow circles: 'special plates’ Green: completed until Oct. 1

  7. SEGUE data: spectra • http://www-sdss.fnal.gov/yanny/seguets • 144 plates (counts) • ~100 have 1d spectra • ~90 plates have been processed (seinfo*) • position, proper motion, radial velocity, [Fe/H], Teff, distance (estimates based on type) • http://www-sdss.fnal.gov/spectroRoot/ 3w_live/plateList.html • 178 plates Oct 27 • 1d spectra • http://das.sdss.org/data/dp30.a/data/spectro/2d_23/

  8. SEGUE data: imaging • 50% in March • http://www-sdss.fnal.gov/index.shtml"Data Processing: Status" "List of Imaging Runs" (2006.10.23) • http://www-sdss.fnal.gov/skent/run.par • stripe > 200 .and. stripe = 72, 79, 90 • CAS, DAS

  9. DR6 • Release to collab Apr. 1, 2007 • Release to public July. 1, 2007 • Stellar atmosphere parameters for stars; Spectra; Imaging……

  10. SN Survey • Three months (Sep.~Nov.) per year, repeatedly scans a 300 square degree area . • Stripe 82: 2.5 x 120 deg RA=[-60,60] DEC=[-1.2,1.2] Galactic coordinates Equatorial coordinates

  11. SN survey • At least 100 imaging of 82 stripe (Oct. 26) • http://sdssdp47.fnal.gov/sdsssn_data/ candidates/index.html • 15833 candidates • 476 typed (Oct. 25) • Imaging, follow up imaging (fits) • Spectra, follow up spectra • Light curve

  12. DRSN1 • imaging from Sep. 1, 2005 ~ Dec. 1, 2005 • Run-list: http://www.sdss.org/drsn1/ DRSN1_run_list.html • Data: http://das.sdss.org/DRSN1-cgi-bin/ DASsn • Corrected frame: fpC • uncalibrated object catalogs: fpObjc

  13. Thank you!

More Related