|
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| • |
Search
for data that meets certain criteria
|
|
|
| • |
Return
matching data, and only matching data
|
|
| • |
Example:
search for galaxies
|
|
|
with
spectra in Abell 168
|
|
|
|
– |
RA
= 18.84, Dec = 0.26,
|
|
|
radius
= 3 arcmin
|
|
|
|
– |
Limit
to galaxies g < 18
|
|
|
|
– |
Return
RA, Dec,
|
|
|
magnitudes,
redshift
|
|
|
|