The nature of use_src=0 dup_src=0 sources with high SNR

Below are examples of a dozen bright (typically Ks<13.5) rd_flg="222" cc_flg="000" sources for which use_src=0 and dup_src=0.

Observations:

Conclusions:


Example images

Note: If a pair of images appears below the circle on the left image is centered on the source in question. The requested source position had to be shifted in order to get the adjacent scan's coadd to appear in the image server so for subsequent images the location of the circle is arbitrary. The starfield must be used to locate the source.


Example 1 -- counterpart lost due to persistence

 

v3 WSDB entry


Example 2 -- counterpart lost for unknown reasons

 

v3 WSDB entry


Example 3 -- counterpart lost due to persistence

 

v3 WSDB entry


Example 4 -- counterpart lost for unknown reasons

 

v3 WSDB entry


Example 5

-- counterpart(s) lost for persistence (obviously...)

v3 WSDB entry


Example 6 - persistence

v3 WSDB entry


Example 7 - persistence

  


Example 8 - persistence

 

v3 WSDB entry


Example 9 - persistence

 

v3 WSDB entry


Example 10 - persistence

 

v3 WSDB entry


Example 11 -- faint source, unknown cause for rejection

 

v3 WSDB entry


Example 12 - this source is rd_flg="200" cc_flg="000" just to show an example. It is likely an artifact of a bright star. It has J-snr just above 10, but is not detected in the other bands. Although it lies in the overlap region the WSDB has only one entry.

v3 WSDB entry


Mike Skrutskie
April 16, 2002