Cooking with Sloan: General Tasks: Find Data for Objects
 
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Check Flags

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Flags in Imaging Query Form (open in new window)


You can search through flags as part of your searches with the Imaging Query Form (link opens in a new window). You can request that the tool return only objects that possess one or more flags, such as searching for moving objects by looking for the MOVED flag. Or you can search for only those objects that do not possess certain flags, such as searching for unsaturated objects by checking that the SATURATED flag is off.

  1. Go to the Imaging Query Form. From the astronomers' main page, look under Search Tools. For more on how to use the Imaging Query Form, see the guide How do I find data for all objects in a given RA/Dec/Magnitude/Absolute Magnitude range?

  2. Select any parameters you like on the form, then look at the Obj Flags drop-down menus at the bottom of the form.

  3. To guarantee that your results will possess a certain flag, select the flag from the At least one of these flags ON menu. To select more than one flag to check, hold down the CTRL key while selecting.

  4. To guarantee that your results will not possess a certain flag, select the flag from the All of these flags OFF menu. To select more than one flag to check, hold down the CTRL key while selecting.

  5. The flags will not show up in the search results unless you specifically request them in the Imaging menu of the Parameters to Return section above. But the flags will be searched, and the search will return only objects that meet your flag criteria.

  6. Click Submit Request to send your query to the database.


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