Locating noise-dominated data in quadrant 0
    : Time   totcounts   fraction
    : 401050986.0  2139  0.832
    : 401050987.0  2284  0.830
    : 401050988.0  2148  0.827
    : 401057256.0  2267  0.838
    : 401057257.0  2053  0.823
    : 401057258.0  2021  0.814
    : 401057385.0  2499  0.884
    : 401057386.0  2209  0.818
    : 401057415.0  2169  0.828
    : 401057416.0  2279  0.861
    : 401057419.0  2432  0.870
    : 401057420.0  2587  0.927
    : 401057502.0  2535  0.889
    : 401057503.0  2693  0.954
    : 401057504.0  2552  0.928
    : 401057507.0  2313  0.870
    : 401057508.0  2646  0.952
    : 401057509.0  2684  0.933
    : 401057510.0  2755  0.937
    : 401057518.0  2556  0.899
    : 401057519.0  2269  0.903
    : 401057521.0  2201  0.822
    : 401057522.0  2763  0.987
    : 401057523.0  2358  0.877
    Total number of 1 second bins: 7034
    Bins with >0 counts          : 4972
    Bins with >2000 counts       : 24
    24 of 24 high count rate bins were dominated by noise
    Noise dominated 0.34% of total time, 0.48% of detector on time (defined as non-zero counts)


Locating noise-dominated data in quadrant 1
    : Time   totcounts   fraction
    : 401051040.0  2018  0.834
    : 401051449.0  2109  0.829
    : 401051450.0  2286  0.836
    : 401051451.0  2338  0.919
    : 401051452.0  2553  0.948
    : 401051454.0  2485  0.948
    : 401051455.0  2286  0.968
    : 401051456.0  2201  0.967
    : 401051457.0  2482  0.965
    : 401051458.0  2242  0.937
    : 401051459.0  2259  0.878
    : 401051461.0  2093  0.845
    : 401051463.0  2066  0.818
    : 401051512.0  2265  0.882
    : 401051513.0  2336  0.967
    : 401051514.0  2677  0.959
    : 401051515.0  2637  0.954
    : 401051516.0  2427  0.866
    : 401051518.0  2461  0.926
    : 401051519.0  2259  0.878
    : 401051520.0  2139  0.878
    : 401051718.0  2608  0.942
    : 401051807.0  2133  0.829
    : 401051808.0  2186  0.996
    : 401051809.0  2082  0.875
    : 401051810.0  2034  0.870
    : 401051811.0  2320  0.912
    : 401051812.0  2651  0.938
    : 401051813.0  2386  0.937
    : 401051814.0  2667  0.969
    : 401051815.0  2685  0.973
    : 401051816.0  2640  0.959
    : 401051817.0  2065  0.956
    : 401051819.0  2453  0.925
    : 401052496.0  2061  0.861
    : 401052500.0  2042  0.851
    : 401052812.0  2364  0.869
    : 401052816.0  2250  0.908
    : 401052818.0  2373  0.868
    : 401052819.0  2476  0.945
    : 401052820.0  2192  0.826
    : 401052821.0  2009  0.861
    : 401052822.0  2410  0.878
    : 401052824.0  2560  0.939
    : 401052825.0  2517  0.904
    : 401052827.0  2406  0.907
    : 401052828.0  2634  0.946
    : 401052830.0  2273  0.919
    : 401052831.0  2607  0.982
    : 401052832.0  2370  0.904
    : 401052833.0  2528  0.927
    : 401052834.0  2709  0.980
    : 401052835.0  2591  0.927
    : 401052836.0  2604  0.960
    : 401052837.0  2505  0.960
    : 401052838.0  2460  0.963
    : 401052839.0  2567  0.926
    : 401052840.0  2552  0.974
    : 401052841.0  2521  0.923
    : 401052842.0  2675  0.960
    : 401052843.0  2796  0.949
    : 401052844.0  2571  0.935
    : 401052845.0  2528  0.975
    : 401052846.0  2649  0.963
    : 401052847.0  2787  0.948
    : 401052848.0  2726  0.977
    : 401052849.0  2628  0.988
    : 401053120.0  2011  0.842
    : 401053601.0  2641  0.915
    : 401053606.0  2066  0.840
    : 401053607.0  2236  0.837
    : 401053614.0  2008  0.851
    : 401053629.0  2241  0.863
    : 401053630.0  2205  0.867
    : 401053631.0  2215  0.864
    : 401053632.0  2440  0.876
    : 401053635.0  2328  0.873
    : 401053636.0  2563  0.948
    : 401053638.0  2616  0.897
    : 401053639.0  2344  0.867
    : 401053640.0  2328  0.888
    : 401053641.0  2632  0.953
    : 401053642.0  2539  0.924
    : 401053668.0  2482  0.926
    : 401053699.0  2043  0.831
    : 401053702.0  2073  0.828
    : 401053703.0  2455  0.910
    : 401053705.0  2027  0.884
    : 401053706.0  2754  0.914
    : 401053707.0  2668  0.914
    : 401053709.0  2582  0.908
    : 401053710.0  2393  0.886
    : 401053718.0  2559  0.944
    : 401053721.0  2007  0.844
    : 401053723.0  2231  0.860
    : 401053724.0  2461  0.904
    : 401053725.0  2005  0.835
    : 401053796.0  2441  0.954
    : 401053797.0  2144  0.863
    : 401053798.0  2800  0.983
    : 401053799.0  2562  0.977
    : 401053809.0  2409  0.860
    : 401053810.0  2350  0.869
    : 401053811.0  2517  0.913
    : 401053812.0  2619  0.948
    : 401053813.0  2684  0.913
    : 401055094.0  2438  0.925
    : 401055099.0  2208  0.912
    : 401057572.0  2239  0.854
    : 401057574.0  2036  0.821
    : 401057585.0  2086  0.838
    Total number of 1 second bins: 7033
    Bins with >0 counts          : 4970
    Bins with >2000 counts       : 111
    111 of 111 high count rate bins were dominated by noise
    Noise dominated 1.58% of total time, 2.23% of detector on time (defined as non-zero counts)


Locating noise-dominated data in quadrant 2
    : Time   totcounts   fraction
    : 401050986.0  2853  0.965
    : 401050987.0  2514  0.991
    : 401050988.0  2724  0.953
    : 401050989.0  2603  0.970
    : 401050990.0  2579  0.978
    : 401050991.0  2429  0.856
    : 401050992.0  2442  0.907
    : 401050993.0  2166  0.830
    : 401050994.0  2337  0.852
    : 401050995.0  2464  0.925
    : 401050997.0  2119  0.818
    : 401050998.0  2203  0.882
    : 401051001.0  2281  0.866
    : 401051002.0  2479  0.897
    : 401051004.0  2355  0.851
    : 401051008.0  2195  0.836
    : 401053630.0  2689  0.898
    : 401053631.0  2755  0.942
    : 401057256.0  2741  0.961
    : 401057257.0  2639  0.983
    : 401057258.0  2355  0.955
    : 401057259.0  2716  0.933
    : 401057260.0  2494  0.924
    : 401057261.0  2178  0.873
    : 401057262.0  2137  0.854
    : 401057263.0  2140  0.864
    : 401057266.0  2184  0.821
    : 401057269.0  2354  0.861
    : 401057271.0  2267  0.887
    : 401057281.0  2433  0.851
    : 401057282.0  2299  0.860
    : 401057284.0  2162  0.855
    : 401057285.0  2073  0.844
    Total number of 1 second bins: 7033
    Bins with >0 counts          : 4970
    Bins with >2000 counts       : 33
    33 of 33 high count rate bins were dominated by noise
    Noise dominated 0.47% of total time, 0.66% of detector on time (defined as non-zero counts)


Locating noise-dominated data in quadrant 3
    : Time   totcounts   fraction
    : 401051007.0  2270  0.839
    : 401051155.0  2011  0.865
    : 401051233.0  2063  0.807
    : 401051236.0  2374  0.869
    : 401051412.0  2037  0.828
    : 401051443.0  2232  0.861
    : 401051446.0  2132  0.835
    : 401051670.0  2499  0.890
    : 401052318.0  2361  0.881
    : 401052319.0  2482  0.923
    : 401052428.0  2322  0.877
    : 401052502.0  2429  0.895
    : 401052504.0  2186  0.844
    : 401052539.0  2351  0.986
    : 401052540.0  2076  0.921
    : 401052549.0  2416  0.896
    : 401052552.0  2395  0.876
    : 401052553.0  2586  0.997
    : 401052554.0  2848  0.993
    : 401052555.0  3020  0.982
    : 401052556.0  2803  0.985
    : 401052573.0  2541  0.900
    : 401052574.0  2518  0.921
    : 401052575.0  2606  0.934
    : 401052586.0  2796  0.920
    : 401052588.0  2112  0.866
    : 401052589.0  2736  0.914
    : 401052590.0  2723  0.911
    : 401052591.0  2434  0.871
    : 401052592.0  2423  0.901
    : 401052596.0  2177  0.858
    : 401052597.0  2253  0.868
    : 401052598.0  2848  0.976
    : 401052608.0  2602  0.896
    : 401052609.0  2119  0.839
    : 401052624.0  2038  0.823
    : 401052732.0  2575  0.901
    : 401052977.0  2659  0.904
    : 401052978.0  2578  0.887
    : 401052996.0  2616  0.981
    : 401053550.0  2087  0.835
    : 401053554.0  2034  0.855
    : 401054519.0  2263  0.885
    : 401054520.0  2339  0.920
    : 401054521.0  2166  0.899
    : 401054536.0  2056  0.853
    : 401054891.0  2426  0.901
    : 401057302.0  2265  0.857
    : 401057303.0  2694  0.929
    : 401057304.0  2600  0.918
    : 401057305.0  2443  0.925
    : 401057323.0  2171  0.909
    : 401057324.0  2595  0.921
    : 401057325.0  2614  0.922
    : 401057326.0  2606  0.925
    : 401057327.0  2361  0.909
    : 401057328.0  2572  0.888
    : 401057329.0  2497  0.914
    : 401057330.0  2576  0.904
    : 401057331.0  2515  0.913
    : 401057332.0  2247  0.876
    : 401057333.0  2643  0.914
    : 401057334.0  2436  0.898
    : 401057335.0  2565  0.902
    : 401057336.0  2351  0.909
    : 401057337.0  2333  0.922
    : 401057338.0  2484  0.905
    : 401057339.0  2520  0.891
    : 401057340.0  2120  0.862
    : 401057341.0  2232  0.809
    : 401057345.0  2264  0.835
    : 401057346.0  2227  0.855
    : 401057347.0  2354  0.866
    : 401057348.0  2151  0.826
    : 401057350.0  2128  0.848
    : 401057352.0  2067  0.839
    : 401057353.0  2149  0.863
    : 401057354.0  2142  0.817
    : 401057355.0  2221  0.812
    : 401057360.0  2025  0.812
    : 401057361.0  2131  0.815
    : 401057362.0  2154  0.825
    : 401057363.0  2316  0.854
    : 401057364.0  2323  0.854
    : 401057365.0  2001  0.849
    : 401057366.0  2061  0.845
    : 401057367.0  2025  0.840
    : 401057368.0  2215  0.835
    : 401057369.0  2323  0.852
    : 401057370.0  2392  0.861
    : 401057371.0  2034  0.829
    : 401057372.0  2448  0.853
    : 401057373.0  2203  0.847
    : 401057374.0  2202  0.848
    : 401057375.0  2156  0.831
    : 401057376.0  2256  0.837
    : 401057377.0  2229  0.835
    : 401057378.0  2066  0.816
    : 401057380.0  2304  0.861
    : 401057381.0  2448  0.875
    : 401057382.0  2308  0.860
    : 401057383.0  2186  0.847
    : 401057384.0  2255  0.862
    : 401057385.0  2418  0.842
    : 401057386.0  2011  0.850
    : 401057388.0  2261  0.873
    : 401057389.0  2267  0.874
    : 401057390.0  2264  0.850
    : 401057391.0  2210  0.867
    : 401057392.0  2227  0.893
    : 401057393.0  2442  0.867
    : 401057394.0  2323  0.863
    : 401057395.0  2048  0.828
    : 401057397.0  2194  0.841
    : 401057398.0  2425  0.859
    : 401057399.0  2076  0.844
    : 401057400.0  2226  0.876
    : 401057401.0  2258  0.844
    : 401057402.0  2235  0.847
    : 401057403.0  2241  0.846
    : 401057404.0  2240  0.840
    : 401057405.0  2159  0.844
    : 401057406.0  2349  0.858
    : 401057407.0  2080  0.850
    : 401057408.0  2514  0.872
    : 401057409.0  2207  0.834
    : 401057410.0  2268  0.842
    : 401057412.0  2396  0.859
    : 401057413.0  2044  0.811
    : 401057420.0  2071  0.798
    : 401057425.0  2138  0.826
    : 401057426.0  2032  0.800
    : 401057427.0  2184  0.872
    : 401057428.0  2019  0.984
    : 401057429.0  2081  0.821
    : 401057430.0  2014  0.844
    : 401057432.0  2485  0.878
    : 401057434.0  2465  0.924
    : 401057435.0  2346  0.904
    : 401057436.0  2407  0.886
    : 401057437.0  2134  0.873
    : 401057438.0  2105  0.890
    : 401057439.0  2163  0.882
    : 401057440.0  2453  0.895
    : 401057441.0  2277  0.908
    : 401057443.0  2622  0.934
    : 401057444.0  2067  0.884
    : 401057445.0  2177  0.863
    : 401057446.0  2063  0.823
    : 401057448.0  2080  0.825
    : 401057451.0  2307  0.898
    : 401057452.0  2091  0.923
    : 401057453.0  2412  0.876
    : 401057454.0  2531  0.898
    : 401057455.0  2343  0.875
    : 401057456.0  2628  0.899
    : 401057457.0  2190  0.842
    : 401057458.0  2406  0.894
    : 401057459.0  2580  0.903
    : 401057460.0  2422  0.905
    : 401057461.0  2400  0.888
    : 401057462.0  2430  0.872
    : 401057463.0  2093  0.859
    : 401057464.0  2461  0.868
    : 401057465.0  2483  0.856
    : 401057466.0  2308  0.843
    : 401057467.0  2066  0.821
    : 401057468.0  2619  0.875
    : 401057469.0  2307  0.859
    : 401057470.0  2525  0.871
    : 401057472.0  2284  0.864
    : 401057473.0  2270  0.845
    : 401057474.0  2311  0.868
    : 401057475.0  2258  0.863
    : 401057476.0  2172  0.851
    : 401057477.0  2241  0.825
    : 401057478.0  2207  0.833
    : 401057480.0  2281  0.838
    : 401057481.0  2319  0.845
    : 401057482.0  2054  0.851
    : 401057483.0  2343  0.853
    : 401057485.0  2149  0.844
    : 401057486.0  2259  0.822
    : 401057487.0  2021  0.829
    : 401057488.0  2231  0.848
    : 401057489.0  2132  0.886
    : 401057490.0  2275  0.887
    : 401057491.0  2760  0.941
    : 401057492.0  2515  0.912
    : 401057493.0  2252  0.892
    : 401057494.0  2172  0.841
    : 401057495.0  2198  0.840
    : 401057496.0  2628  0.924
    : 401057497.0  2595  0.916
    : 401057498.0  2725  0.923
    : 401057499.0  2548  0.905
    : 401057500.0  2477  0.930
    : 401057501.0  2700  0.931
    : 401057502.0  2575  0.922
    : 401057503.0  2523  0.914
    : 401057504.0  2616  0.910
    : 401057505.0  2184  0.837
    : 401057506.0  2260  0.871
    : 401057507.0  2354  0.856
    : 401057508.0  2368  0.864
    : 401057509.0  2280  0.854
    : 401057510.0  2287  0.853
    : 401057511.0  2193  0.858
    : 401057512.0  2214  0.845
    : 401057513.0  2100  0.857
    : 401057514.0  2384  0.871
    : 401057515.0  2487  0.884
    : 401057516.0  2240  0.863
    : 401057518.0  2040  0.842
    : 401057519.0  2223  0.843
    : 401057520.0  2040  0.841
    : 401057569.0  2077  0.829
    : 401057613.0  2281  0.898
    : 401057615.0  2246  0.865
    : 401057616.0  2029  0.898
    : 401057618.0  2061  0.897
    : 401057628.0  2156  0.831
    : 401057629.0  2094  0.835
    : 401057630.0  2179  0.860
    : 401057635.0  2206  0.840
    : 401057648.0  2080  0.840
    : 401057661.0  2042  0.845
    : 401057663.0  2112  0.849
    : 401057664.0  2119  0.866
    : 401057666.0  2150  0.847
    : 401057671.0  2205  0.883
    : 401057672.0  2069  0.860
    : 401057678.0  2093  0.855
    : 401057679.0  2223  0.858
    : 401057683.0  2073  0.822
    : 401057684.0  2123  0.835
    : 401057685.0  2227  0.839
    : 401057686.0  2047  0.827
    : 401057687.0  2386  0.844
    : 401057688.0  2423  0.879
    : 401057689.0  2513  0.879
    : 401057690.0  2245  0.849
    : 401057691.0  2487  0.884
    : 401057692.0  2395  0.898
    : 401057693.0  2416  0.855
    : 401057694.0  2382  0.846
    : 401057695.0  2370  0.853
    : 401057696.0  2254  0.862
    : 401057697.0  2258  0.853
    : 401057698.0  2426  0.852
    : 401057699.0  2096  0.843
    : 401057700.0  2266  0.875
    : 401057701.0  2307  0.900
    : 401057702.0  2011  0.917
    : 401057703.0  2175  0.890
    : 401057704.0  2399  0.844
    : 401057706.0  2468  0.901
    : 401057707.0  2403  0.910
    : 401057708.0  2232  0.889
    : 401057709.0  2429  0.922
    : 401057710.0  2397  0.915
    : 401057711.0  2316  0.943
    : 401057712.0  2493  0.937
    : 401057714.0  2215  0.887
    : 401057715.0  2090  0.922
    : 401057716.0  2053  0.832
    : 401057718.0  2306  0.881
    : 401057719.0  2244  0.861
    : 401057720.0  2222  0.853
    : 401057722.0  2677  0.920
    : 401057723.0  2470  0.869
    : 401057725.0  2602  0.875
    : 401057726.0  2363  0.893
    : 401057727.0  2447  0.913
    : 401057728.0  2431  0.915
    : 401057729.0  2835  0.941
    : 401057730.0  2235  0.877
    : 401057731.0  2429  0.880
    : 401057732.0  2286  0.834
    : 401057733.0  2126  0.840
    : 401057734.0  2115  0.835
    : 401057735.0  2127  0.830
    : 401057737.0  2389  0.859
    : 401057738.0  2248  0.867
    : 401057739.0  2031  0.821
    : 401057740.0  2263  0.859
    : 401057741.0  2206  0.861
    : 401057742.0  2528  0.941
    : 401057743.0  2514  0.903
    : 401057744.0  2527  0.888
    : 401057745.0  2672  0.909
    : 401057746.0  2344  0.872
    : 401057747.0  2227  0.865
    : 401057748.0  2208  0.870
    : 401057749.0  2296  0.832
    : 401057751.0  2051  0.828
    : 401057752.0  2538  0.877
    : 401057753.0  2313  0.892
    : 401057754.0  2690  0.917
    : 401057755.0  2561  0.894
    : 401057756.0  2423  0.916
    : 401057757.0  2369  0.863
    : 401057758.0  2681  0.901
    : 401057759.0  2155  0.891
    : 401057760.0  2601  0.896
    : 401057761.0  2012  0.839
    : 401057762.0  2441  0.868
    : 401057763.0  2452  0.878
    : 401057764.0  2551  0.870
    : 401057765.0  2346  0.864
    : 401057766.0  2234  0.876
    : 401057767.0  2566  0.885
    : 401057768.0  2075  0.840
    : 401057770.0  2511  0.876
    : 401057771.0  2268  0.849
    : 401057772.0  2058  0.817
    : 401057775.0  2336  0.887
    : 401057776.0  2358  0.888
    : 401057777.0  2498  0.883
    : 401057778.0  2653  0.891
    : 401057779.0  2271  0.866
    : 401057780.0  2484  0.899
    : 401057781.0  2726  0.894
    : 401057782.0  2723  0.935
    : 401057783.0  2618  0.930
    : 401057784.0  2568  0.944
    : 401057785.0  2462  0.911
    : 401057786.0  2636  0.920
    : 401057787.0  2291  0.890
    : 401057788.0  2545  0.902
    : 401057789.0  2459  0.887
    : 401057790.0  2536  0.887
    : 401057791.0  2044  0.870
    : 401057792.0  2363  0.892
    : 401057793.0  2297  0.861
    : 401057794.0  2565  0.893
    : 401057795.0  2294  0.882
    : 401057796.0  2486  0.908
    : 401057797.0  2194  0.863
    : 401057799.0  2317  0.879
    : 401057800.0  2460  0.916
    : 401057801.0  2583  0.908
    : 401057802.0  2580  0.907
    : 401057803.0  2418  0.871
    : 401057804.0  2484  0.874
    : 401057805.0  2494  0.876
    : 401057806.0  2471  0.891
    : 401057808.0  2293  0.855
    : 401057809.0  2649  0.876
    : 401057810.0  2385  0.865
    : 401057811.0  2587  0.877
    : 401057812.0  2599  0.881
    : 401057813.0  2377  0.888
    : 401057814.0  2350  0.868
    : 401057815.0  2021  0.836
    : 401057816.0  2461  0.873
    : 401057818.0  2564  0.890
    : 401057819.0  2279  0.864
    : 401057820.0  2234  0.885
    : 401057821.0  2683  0.917
    : 401057822.0  2591  0.917
    : 401057823.0  2669  0.904
    : 401057824.0  2683  0.943
    : 401057825.0  2444  0.926
    : 401057826.0  2687  0.944
    : 401057827.0  2427  0.927
    : 401057828.0  2693  0.944
    : 401057829.0  2635  0.935
    : 401057830.0  2604  0.919
    : 401057831.0  2559  0.924
    : 401057832.0  2608  0.926
    : 401057833.0  2501  0.940
    : 401057834.0  2635  0.939
    : 401057835.0  2239  0.862
    : 401057836.0  2326  0.871
    : 401057837.0  2018  0.889
    : 401057838.0  2372  0.866
    : 401057839.0  2305  0.849
    : 401057840.0  2104  0.837
    : 401057843.0  2161  0.828
    : 401057844.0  2523  0.890
    : 401057850.0  2111  0.833
    : 401057860.0  2017  0.839
    : 401057861.0  2212  0.840
    : 401057862.0  2168  0.821
    : 401057864.0  2440  0.872
    : 401057865.0  2463  0.895
    : 401057866.0  2564  0.908
    : 401057867.0  2693  0.919
    : 401057868.0  2533  0.883
    : 401057869.0  2479  0.900
    : 401057870.0  2304  0.878
    : 401057871.0  2590  0.913
    : 401057872.0  2646  0.924
    : 401057873.0  2616  0.911
    : 401057874.0  2518  0.914
    : 401057876.0  2044  0.792
    : 401057880.0  2070  0.828
    : 401057893.0  2051  0.813
    : 401057902.0  2178  0.849
    : 401057916.0  2348  0.878
    : 401057942.0  2166  0.878
    : 401057945.0  2248  0.883
    : 401057946.0  2062  0.849
    : 401057947.0  2080  0.843
    : 401057950.0  2029  0.838
    : 401057959.0  2136  0.858
    : 401057964.0  2301  0.874
    : 401057965.0  2062  0.874
    : 401057966.0  2089  0.856
    : 401057967.0  2089  0.847
    : 401057968.0  2037  0.849
    : 401057976.0  2312  0.849
    : 401057987.0  2472  0.939
    : 401057988.0  2210  0.886
    : 401057989.0  2297  0.898
    : 401057990.0  2261  0.862
    : 401057992.0  2307  0.934
    : 401057993.0  2122  0.879
    : 401057995.0  2330  0.891
    : 401057996.0  2194  0.845
    : 401057997.0  2031  0.915
    : 401057998.0  2170  0.936
    : 401058000.0  2247  0.915
    : 401058002.0  2018  0.878
    : 401058003.0  2145  0.857
    : 401058004.0  2098  0.861
    : 401058005.0  2262  0.902
    : 401058006.0  2129  0.893
    : 401058007.0  2079  0.873
    : 401058009.0  2138  0.867
    : 401058010.0  2107  0.850
    : 401058011.0  2188  0.909
    : 401058012.0  2238  0.913
    : 401058013.0  2178  0.878
    : 401058014.0  2232  0.923
    : 401058015.0  2128  0.913
    : 401058016.0  2191  0.918
    Total number of 1 second bins: 7033
    Bins with >0 counts          : 4971
    Bins with >2000 counts       : 438
    438 of 438 high count rate bins were dominated by noise
    Noise dominated 6.23% of total time, 8.81% of detector on time (defined as non-zero counts)