< Quality Flags |
< WGACAT (1995) |
< WGACAT (2000) |
<
<
12 |
< - |
< A secure detection of a point source |
< 11 |
< - |
< Good detection located near the inner detector support structure(at ~20 arcmin radius) |
<
<
<
< 10 |
< A secure detection of a point source |
< Good detection located near the outer edge of detector or near the support structure
< of the detector ("ribs") at offaxis > 20 arcmin radius. |
<
<
<
<
< 9 |
< - |
< Good detection.
< This quality flag is used to indicate that the thumbnails have not an
< optimized rebinning for the source strength and the source appeared
< split with a separation of about 10 arcsec, well inside the 80% HPD
< of the PSF. These sources are mostly at large offaxis and low rate
< (< 1e-2 count/s). |
<
<
<
< 8 |
< The source detections in the entire field
< are secure as a whole. But the individual sources are not inspected. |
< Good detection.This quality flag is used to indicate that the thumbnails have not an
< optimized rebinning for the source strength and the source appeared
< split with a separation less 5 arcsec, well inside the 80% HPD
< of the PSF. These sources are mostly at small offaxis and low rate
< (< 1e-2 count/s). |
<
<
< 7 |
< - |
< Good detection, but is located within bright background due to extended emission such
< as clusters, supernova remnants or near bright X-ray binaries. |
<
<
< 6 |
< - |
< The point source detection is good but it is weak source. |
<
<
< 5 |
< The source detection is suspicious due to
< the existence of bright emission features such as clusters, SNRs etc. in the
< field of view |
< The source detection is good, but it may be extended or elongated. |
<
<
< 4 |
< Many (typically more than a half) of the detections are caused by extended
< emission,but there are still good sources |
< The detections are spurious due to nearby bright sources and also located at
< (or near) the inner ring, the edge or the ribs of the detector |
<
<
< 3 |
< The source looks perfectly good but is really bad.
< This may result from a local arc in the detector caused by a temporary HV breakdown
< or by a mystery pointing that interrupt the sequence |
< Although the source looks good, it is not a real detection.
< This may result from a local arc in the detector caused by a temporary HV breakdown
< or by mystery pointings that interrupts the sequence. This flag also used as
< the indicator for Supernova remnants that are extended over the field. |
<
<
< 2 |
< The observation was taken within the first 2 months of the mission (June - July 1990)
< where the processing and satellite were unstable |
< The observation was taken within the first 2 months of the mission (June-July 1990)
< where the processing and satellite were unstable. One of all double-counted sources
< detected in between "in", "in2" and "out" regions and duplicate sequences is suppressed
< by assigning QFlag=2. |
<
<
< 1 |
< Most of the detections in the field are spurious because of a large extended object |
< The source detection is false caused by spurious detections due to extended
< emission from bright Supernova remnant or Low Mass X-ray Binary in the field |
<
< 0 |
< - |
< Same as QFLAG 1, but the spurious
< detections are caused by clusters |
<
<
---
>
>
>