Photometry of SDSS Data: A How-To Guide

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Discussion Overview

The discussion revolves around obtaining photometry from SDSS (Sloan Digital Sky Survey) data, with participants exploring methods and resources for accessing both photometric and spectral data for specific astronomical objects.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related

Main Points Raised

  • Some participants inquire about how to access photometry data from SDSS, seeking guidance on specific tools or methods.
  • One participant mentions finding spectra through a specific tutorial link and expresses interest in locating photometry in a similar manner.
  • Another participant suggests that if the ObjID of the objects is known, accessing photometry is straightforward using the SDSS Explore tool, providing an example ObjID and a link to the tool.
  • There is a mention that if the ObjID is not known, but the RA and Dec coordinates are available, there is an additional step required to find the photometry.

Areas of Agreement / Disagreement

Participants generally agree on the utility of the SDSS Explore tool for accessing photometry, but there is no consensus on the best approach if the ObjID is not known, indicating some uncertainty in the process.

Contextual Notes

Limitations include the dependency on having the ObjID or RA and Dec coordinates to effectively access the desired data, and the discussion does not resolve the steps required for those without the ObjID.

randa177
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Does anyone have any idea how to get the photometry of SDSS data?
 
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randa177 said:
Does anyone have any idea how to get the photometry of SDSS data?
From http://cas.sdss.org/dr6/en/" .

Is there anything in particular that you are looking for?
 
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Is there anything in particular that you are looking for?


Actually I would like to find the spectra and photometry for a set of objects,
I can find the spectra here:
http://www.sdss.org/dr6/tutorials/colorconstraints.html
I am wondering if I can find the photometry in a similar way?
 
randa177 said:
Actually I would like to find the spectra and photometry for a set of objects,
I can find the spectra here:
http://www.sdss.org/dr6/tutorials/colorconstraints.html
I am wondering if I can find the photometry in a similar way?
Do you have the ObjID of the objects?

If so, then it's a piece of cake! Just use http://cas.sdss.org/astro/en/tools/explore/obj.asp" .

For example, ObjID is 588298663036649507, http://cas.sdss.org/astro/en/tools/explore/obj.asp?id=588298663036649507"'s what the Explore tool gives you, complete with spectra AND photometry! :smile:

If you don't know the ObjID, but do know the RA and Dec, then it's just one more step ...
 
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