View source for Instructions for source matching


== Updated Source Matching ==


1.  Open up the table from Gregorio's paper. [[File:Gregorio 20120514.txt]] in one webpage.

2.  Open up another webpage with the [http://irsa.ipac.caltech.edu/applications/Gator/ Gator Catalog List]

3.  In Gator, choose 2MASS (Two Micron All-Sky Survey), the second choice. Then click the Select button by the title IRSA CATALOGS.

4.  On the next page, choose 2MASS All-Sky Point Source Catalog (PSC) and then click the Select button by the title 2MASS All-Sky Release Database. The query page that comes up is the one we will be using over and over.

2.  Find the Gregorio sources you are responsible for (listed below). We only care about the sources that are marked with * . The others are not in our BRCs. 

3.  Follow the next steps for one source at a time. Enter your data in our [https://docs.google.com/spreadsheet/ccc?key=0AlM5saVgH2ZCdC1xVVA1eDlKeDM4Z3RoWmVtUjVaVHc google docs spreadsheet Gregorio Source Matching]. You are going to have to enter one cell's worth of data at a time in the google doc, whereas you can highlight both ra and dec at once and paste it into the query form webpage. You are the analyst, so put your name in that cell. You will notice that Gregorio did some matching to 2MASS, but it is not updated. So we need to do each. 
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== Step by step instructions ==


A. In Gregorio's table, copy the ''RA''  (hh mm ss - hours, min, sec) and ''Dec'' (deg, arcmin, arc sec) for your object. 

B.  In the query webpage, paste the ra and dec in the ''Coordinate or Object Name'' box

C.  Under method, leave Cone checked and change the ''Radius'' to 5 (5 arc sec)

D.  Click the ''Run Query'' button. 

E.  Look at the plot. The Red triangle is where the coordinates you put in are located. The green circle is a source that 2MASS found at or close to your location. If there are sources found, they will show up in rows listed under the plot. If there are objects listed, decide which object matches yours. 

F.  Scroll through the listed rows and find the ''designation''. Copy this and paste it into the spreadsheet. This is 2MASS's name for your object.

G.  Do the same thing for ra and dec. Both of these will be in decimal deg, not hours or deg. Paste both into the spreadsheet.

H.  Make any comments you feel necessary. If you had a hard time deciding between 2MASS sources; No sources showing up; etc.  

I.  To do another source, scroll up to the top and click the ''Return to query page'' button. Copy and paste another set of coordinates. You will have to change the radius again.