科学研究 Science Research

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  With the great volume of Sloan Digital Sky Survey (SDSS) data being released (from DR1 to DR13 now), it becomes possible for us to study how galaxies and large scale structure of the universe were formed, what the amount, composition and distribution of matter in clusters and large scale structures are, how the cluster mass density related to the matter density does in the universe and what constraints the cluster and supercluster data place on cosmology. Clusters of galaxies provide a powerful tool for the study  of galaxy formation, dark matter, large-scale structure and cosmology. We often use SDSS, NED, BATC, COSMOS Database, and so on in our science research which methods are provided here. Read them carefully and you will find they are convenient for you. (download software PuttyX-Win32, WinSCP, UltraEdit, FITS Viewer (fv) SAOImage DS9 (ds9) or ESO scisoft8 for Fedora 20.)

1 Data Download

      ADS Home --> Search

      ADS/BAO mirror --> Search

      arxiv.e-print

      SDSS Data Archive Server

      SDSS@NYU

      Max Planck institute for Astrophysics (SDSS)

      Beijing-Arizona-Taiwan-Connecticut (BATC)

      Beijing-Arizona Sky Survey (BASS)

      The South Galactic Cap U-band Sky Survey (SCUSS)

      Cosmic Evolution Survey

      The DEEP2 Redshift Survey

      All-wavelength Extended Groth strip International Survey (AEGIS)

      Chandra X-ray Center   IRSA(Spitzer, WISE, 2MASS, ……)

      Level 5   HyperZ Photometric redshift code

      FITS Viewer (fv) --- fv User's Guide v5.3

      SAOImage DS9 (ds9) --- SAOImage DS9 Users Manual

      Unit Conversion

      Constants

      Scitation

      Physics Review Letters (PRL) 

2Astronomers' Homepages
                   
 

Bian Wei-hao Fan Xiao-hui Ignacio Trujillo Kong Xu Ma Jun
  Raymond E. White Shen Shi-yin

Wu Xue-bing Yang Jian-ming Yang Yan-bin
  Yuan Feng Yuan Qi-rong Zhang Tian-meng Zhou Xu Zou Hu

 

3、SDSS DR13 Data Access Tools

       

Getting Started tells you what types of data you can find on SkyServer, what data each of the tools will return, and how you can best use the tools to study the sky.

Famous Places presents a gallery of beautiful images, various large galaxies, and some of the most distant quasars ever discovered.

Get Images lets you download of individual images and spectra at various zoom levels. Go here if you want to save a nice picture for a screen background.

Scrolling Sky lets you enjoy the sight of the sky moving on the screen as the SDSS telescope sees it when it scans along on its nightly cycle.

Visual Tools

  • Finding Chart returns a JPEG image centered on (ra,dec), of size (height x width)where the image is scaled to an arbitrary scale (scale). Various drawing options can be specified (opt).
  • Navigate lets you interactively navigate the sky, by clicking and zooming.
  • Image List is a cutout service that generates small JPEG images for up to 1000 user-provided positions on the sky.
  • Quick Look lets you view basic data for an object, such as its position, magnitude, and redshift
  • Explore lets you interactively explore the various properties of individual objects.

Search allows you to search the database for sky positions, objects with a certain brightness, and and various other criteria. You can even enter free-format SQL queries, or use a simple form to search the database.

Object Crossid allows you to upload search the database for sky positions, objects with a a list of object positions, and returns the SDSS objects which are within a certain radius of those positions. A few simple upload formats are supported.

CasJobs allows you to submit unlimited SQL queries in batch mode and save query results in your personal database (MyDB).

Help is provided for those who would like to understand more about these tools, using SQL, and the properties of the objects stored in our database.

Download contains a few publications which explain our data in much more detail, and a few tools that can be ran on the user's computer, like the sdssQA, an advanced query tool written in Java.

 

Previous data releases

For reference, we provide links to earlier data releases. The current data release always provides both the largest sky coverage and the highest-quality data and reductions.

4、NASA/IPAC EXTRAGALACTIC DATABASE (NED)

 
Help for Object Queries OBJECTS Help for Data Queries DATA Help for Literature Queries LITERATURE Help for Tools TOOLS Help IndexINFO
By Name
Images By Object Name
or By Region
References by
 
Object Name
Coordinate Transformation &
 
Extinction Calculator
Introduction
Latest News/Updates
 
Near Name Photometry & SEDs References by
 
Author Name
Velocity Calculator Features
FAQ
Near Position Spectra Text Search Cosmology Calculators Overview (pdf)
IAU Format Redshifts Knowledgebase LEVEL5 Extinction-Law Calculators Source List
By Parameters
 
(All-Sky)
Redshift-Independent
 
Distances
Galaxy Distance
 
Tabulations (NED-D)
Skyplot Web Links
By Classifications
 
Classifications by
 
Object Name
Abstracts X/Y offset to RA/DEC Glossary & Lexicon
By Refcode Positions Thesis Abstracts
Batch Job Submission
  Pick Up Results
Team
Object Notes Diameters   NewBuild Data Table from Input List
 
Contact Us
 
or Comment


5COSMOS SkyWalker
—— http://www.mpia.de/COSMOS/skywalker/swcosmosV4.0.html

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