| 1 | Source with TS>35 which went to TS<25 when changing the diffuse model (Section 3.7.1) or the analysis method (Section 3.7.2). Sources with TS<=35 are not flagged with this bit because normal statistical fluctuations can push them to TS<25. |
| 2 | Moved beyond its 95% error ellipse when changing the diffuse model. |
| 4 | Flux (>1GeV) or energy flux (>100MeV) changed by more than 3 sigma when changing the diffuse model or the analysis method. Requires also that the flux change by more than 35% (to not flag strong sources). |
| 8 | Source-to-background ratio less than 10% in highest band in which TS>25. Background is integrated over pir_68_^2^ or 1 square degree, whichever is smaller. |
| 16 | Closer than theta_ref_ from a brighter neighbor. |
| 32 | On top of an interstellar gas clump or small-scale defect in the model of diffuse emission; equivalent to the c designator in the source name (Section 3.7.1). |
| 64 | |
| 128 | |
| 256 | Localization Quality>8 in pointlike (Section 3.1) or long axis of 95% ellipse >0.25deg. |
| 512 | Sigma_i_S_i_^2^>20.5 or S_i_^2^>9 in any band (Equation (5)). |
| 1024 | |
| 2048 | Highly curved spectrum; LP_beta fixed to 1 or PLEC_Index fixed to 0 (see Section 3.3). |
| 4096 | |
| 8192 |