Usage of Sloan Digital Sky Survey / SkyServer / Radial Search
Back to "Investigate about Star"
Open the following page.
Sloan Digital Sky Survey / SkyServer / Radial Search
http://cas.sdss.org/dr3/en/tools/search/radial.asp
For example, let's investigate the data of a star at R.A. 11h38m26s.8, Decl. +03o22'07".
This star is a cataclysmic variable named T Leo.
Input the required parameters.
- ra
-
Input the R.A. in degree.
R.A. 11h38m26s.8 is converted into degree as ( ( 26.8 / 60 + 38 ) / 60 + 11 ) * 15 = 174.6117.
So here input as "174.6117".
- dec
-
Input the Decl. in degree.
Decl. +03o22'07" is converted into degree as ( 7 / 60 + 22 ) / 60 + 3 = 3.3686.
So here input as "3.3686".
- radius [arcmins]
-
When you know the accurate position of the star, you should make the search field very small.
Here input "0.25" in order to search stars within 15x15 arcsec field.
Note that the unit is arcmin.
- Return
-
Here select "all entries" in order to get data of all stars within the search field.
Push the "Submit" button, and the data will be displayed.
Note that all star data within the search field are displayed, so find the correct data based on the R.A. and Decl., or the brightness.
In this case, the magnitudes of T Leo are displayed as follows.
| Band | Mag. |
|---|
| u' | 14.672 |
| g' | 14.857 |
| r' | 15.138 |
| i' | 15.058 |
| z' | 14.816 |
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Acknowledgements:
Funding for the Sloan Digital Sky Survey (SDSS) has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Aeronautics and Space Administration, the National Science Foundation, the U.S. Department of Energy, the Japanese Monbukagakusho, and the Max Planck Society. The SDSS Web site is http://www.sdss.org/.
The SDSS is managed by the Astrophysical Research Consortium (ARC) for the Participating Institutions. The Participating Institutions are The University of Chicago, Fermilab, the Institute for Advanced Study, the Japan Participation Group, The Johns Hopkins University, Los Alamos National Laboratory, the Max-Planck-Institute for Astronomy (MPIA), the Max-Planck-Institute for Astrophysics (MPA), New Mexico State University, University of Pittsburgh, Princeton University, the United States Naval Observatory, and the University of Washington.
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