Locating noise-dominated data in quadrant 0
    : Time   totcounts   fraction
    : 409136195.0  2073  0.820
    : 409136197.0  2005  0.808
    : 409136629.0  2121  0.831
    : 409137166.0  2171  0.827
    : 409137405.0  3034  0.892
    : 409137406.0  3224  0.979
    : 409137408.0  4185  0.970
    : 409137409.0  2555  0.980
    : 409137411.0  2613  0.894
    : 409140426.0  2402  0.862
    : 409142466.0  2259  0.810
    : 409142468.0  2005  0.779
    : 409142508.0  2528  0.882
    : 409142509.0  2422  0.879
    : 409142510.0  2187  0.869
    : 409142511.0  2864  0.927
    : 409142514.0  2151  0.871
    : 409142515.0  2324  0.880
    : 409142521.0  3242  0.927
    : 409142522.0  2014  0.904
    : 409142523.0  2453  0.904
    : 409142914.0  2519  0.886
    : 409142917.0  2017  0.811
    : 409142921.0  2425  0.832
    : 409142926.0  2960  0.884
    : 409142927.0  2065  0.905
    : 409142928.0  2113  0.871
    : 409142930.0  2308  0.808
    : 409142931.0  2236  0.874
    : 409142932.0  2017  0.836
    : 409142933.0  2006  0.821
    : 409142935.0  2080  0.942
    : 409142936.0  2804  0.907
    : 409142937.0  2460  0.886
    : 409142940.0  2516  0.879
    : 409142941.0  2065  0.817
    : 409142942.0  2824  0.914
    : 409142944.0  2416  0.950
    : 409142945.0  2470  0.937
    : 409142948.0  2293  0.887
    : 409142949.0  2374  0.930
    : 409142950.0  2052  0.931
    : 409142953.0  2401  0.881
    : 409142954.0  2444  0.906
    : 409142955.0  2325  0.903
    : 409142956.0  2052  0.897
    : 409142962.0  2056  0.818
    : 409142986.0  2191  0.889
    : 409142988.0  2294  0.862
    : 409142992.0  2088  0.864
    : 409142993.0  2342  0.893
    : 409142995.0  2260  0.862
    : 409142996.0  2620  0.897
    : 409142998.0  2613  0.874
    : 409143026.0  2580  0.851
    : 409143028.0  2453  0.936
    : 409143031.0  2099  0.808
    : 409143033.0  2452  0.872
    : 409143035.0  2813  0.908
    : 409143036.0  2193  0.870
    : 409143037.0  2500  0.924
    : 409143038.0  2136  0.932
    : 409143041.0  2199  0.875
    : 409143042.0  2915  0.930
    : 409143044.0  2239  0.919
    : 409143046.0  2029  0.865
    : 409143047.0  2762  0.887
    : 409143049.0  2487  0.875
    : 409143052.0  2034  0.903
    : 409143053.0  2143  0.915
    : 409143058.0  2205  0.859
    : 409143059.0  2178  0.882
    : 409143060.0  2025  0.856
    : 409143061.0  2292  0.850
    : 409143063.0  2457  0.895
    : 409143064.0  2353  0.905
    : 409143070.0  2141  0.856
    : 409143075.0  2060  0.855
    : 409143082.0  2574  0.900
    : 409143083.0  2506  0.889
    : 409143084.0  2362  0.883
    : 409143086.0  2090  0.854
    : 409143088.0  2160  0.840
    : 409143089.0  2011  0.938
    : 409143091.0  2424  0.934
    : 409143092.0  2110  0.885
    : 409143094.0  2189  0.930
    : 409143095.0  2400  0.942
    : 409143098.0  2745  0.933
    : 409143100.0  2217  0.864
    : 409143101.0  2397  0.948
    : 409143104.0  2277  0.945
    : 409143105.0  3079  0.956
    : 409143108.0  2156  0.922
    : 409143109.0  2010  0.921
    : 409143110.0  2219  0.891
    : 409143114.0  2624  0.859
    : 409143116.0  2339  0.945
    : 409143117.0  2567  0.952
    : 409143118.0  2036  0.950
    : 409143119.0  2334  0.939
    : 409143121.0  3091  0.954
    : 409143126.0  2509  0.894
    : 409143148.0  2164  0.902
    : 409143151.0  2132  0.820
    : 409143152.0  2570  0.862
    : 409143186.0  2916  0.850
    : 409143189.0  3242  0.919
    : 409143197.0  2113  0.915
    : 409143200.0  2470  0.918
    : 409143201.0  2079  0.869
    : 409143202.0  2436  0.901
    : 409143204.0  2317  0.826
    : 409143205.0  2319  0.896
    : 409143207.0  2539  0.911
    : 409143208.0  2053  0.839
    Total number of 1 second bins: 7035
    Bins with >0 counts          : 5153
    Bins with >2000 counts       : 116
    116 of 116 high count rate bins were dominated by noise
    Noise dominated 1.65% of total time, 2.25% of detector on time (defined as non-zero counts)


Locating noise-dominated data in quadrant 1
    : Time   totcounts   fraction
    : 409138350.0  2249  0.896
    : 409138374.0  2138  0.890
    Total number of 1 second bins: 7035
    Bins with >0 counts          : 5153
    Bins with >2000 counts       : 2
    2 of 2 high count rate bins were dominated by noise
    Noise dominated 0.03% of total time, 0.04% of detector on time (defined as non-zero counts)


Locating noise-dominated data in quadrant 2
    : Time   totcounts   fraction
    : 409136253.0  2634  0.864
    : 409136254.0  2207  0.814
    : 409136255.0  2469  0.915
    : 409136256.0  3903  0.939
    : 409136258.0  4037  0.951
    : 409136312.0  2243  0.860
    : 409136316.0  2471  0.913
    : 409136397.0  2882  0.880
    : 409136415.0  2730  0.877
    : 409136440.0  2165  0.833
    : 409136454.0  2406  0.859
    : 409136456.0  2602  0.892
    : 409136499.0  2425  0.871
    : 409136511.0  2359  0.877
    : 409136512.0  2136  0.926
    : 409136531.0  2898  0.883
    : 409136534.0  2449  0.930
    : 409136556.0  2766  0.924
    : 409136766.0  2333  0.888
    : 409136767.0  2196  0.840
    : 409136769.0  2020  0.814
    : 409136770.0  2527  0.863
    : 409136777.0  2500  0.873
    : 409136778.0  2205  0.906
    : 409136781.0  2104  0.834
    : 409136794.0  2056  0.823
    : 409136795.0  3240  0.979
    : 409136797.0  2662  0.848
    : 409136798.0  2207  0.922
    : 409136799.0  2090  0.920
    : 409136820.0  2159  0.811
    : 409136850.0  2063  0.803
    : 409136855.0  2102  0.844
    : 409136857.0  2230  0.860
    : 409136915.0  2235  0.882
    : 409136931.0  2856  0.883
    : 409136980.0  2129  0.831
    : 409137052.0  2151  0.845
    : 409137106.0  2028  0.845
    : 409137175.0  2032  0.840
    : 409137185.0  2501  0.925
    : 409137211.0  2133  0.852
    : 409137221.0  2001  0.825
    : 409137318.0  2020  0.862
    : 409137368.0  2842  0.886
    : 409137369.0  2143  0.904
    : 409137390.0  2030  0.873
    : 409137391.0  3157  0.954
    : 409137437.0  2075  0.853
    : 409137440.0  2821  0.868
    : 409137448.0  2015  0.826
    : 409137456.0  2840  0.893
    : 409137465.0  2342  0.882
    : 409137467.0  4037  0.918
    : 409137469.0  2413  0.880
    : 409137470.0  2188  0.877
    : 409137479.0  2481  0.956
    : 409137607.0  2188  0.862
    : 409137725.0  2757  0.893
    : 409137736.0  2051  0.813
    : 409137738.0  2125  0.812
    : 409137740.0  2828  0.892
    : 409137741.0  2214  0.908
    : 409137742.0  2125  0.913
    : 409137743.0  2006  0.856
    : 409137744.0  2103  0.822
    : 409137754.0  2661  0.878
    : 409137765.0  2432  0.910
    : 409137776.0  2426  0.862
    : 409137806.0  3969  0.917
    : 409137817.0  2703  0.977
    : 409137818.0  2855  0.987
    : 409137821.0  2282  0.897
    : 409137831.0  3214  0.904
    : 409137876.0  2919  0.923
    : 409137877.0  2794  0.926
    : 409137878.0  2017  0.879
    : 409138049.0  2100  0.842
    : 409138057.0  2271  0.856
    : 409138058.0  2475  0.893
    : 409138059.0  2537  0.892
    : 409138060.0  2169  0.843
    : 409138061.0  2599  0.934
    : 409138062.0  2131  0.947
    : 409138063.0  2215  0.933
    : 409138064.0  2064  0.822
    : 409138065.0  3206  0.896
    : 409138067.0  2608  0.934
    : 409138086.0  3606  0.934
    : 409138088.0  2822  0.919
    : 409138089.0  2003  0.933
    : 409138109.0  2872  0.930
    : 409138111.0  2187  0.849
    : 409138125.0  2215  0.919
    : 409138130.0  2211  0.825
    : 409138132.0  2442  0.900
    : 409138135.0  2007  0.830
    : 409138145.0  2040  0.824
    : 409138154.0  2082  0.852
    : 409138155.0  2039  0.822
    : 409138163.0  2390  0.873
    : 409138165.0  3296  0.927
    : 409138166.0  2458  0.954
    : 409138183.0  2341  0.877
    : 409138196.0  2024  0.836
    : 409138215.0  2086  0.829
    : 409138223.0  2954  0.949
    : 409138224.0  2086  0.943
    : 409138225.0  2688  0.970
    : 409138226.0  2410  0.951
    : 409138227.0  2539  0.959
    : 409138228.0  2497  0.946
    : 409138230.0  2152  0.804
    : 409138231.0  2690  0.906
    : 409138232.0  3394  0.910
    : 409138275.0  2117  0.905
    : 409138283.0  2247  0.846
    : 409138284.0  2383  0.870
    : 409138285.0  2753  0.897
    : 409138287.0  2191  0.846
    : 409138288.0  2696  0.870
    : 409138289.0  2855  0.904
    : 409138291.0  2120  0.869
    : 409138292.0  2158  0.845
    : 409138293.0  2318  0.876
    : 409138294.0  2198  0.838
    : 409138295.0  2297  0.865
    : 409138296.0  2339  0.908
    : 409138317.0  2267  0.807
    : 409138331.0  2086  0.799
    : 409138332.0  2402  0.930
    : 409138333.0  2934  0.924
    : 409138336.0  2010  0.824
    : 409138339.0  2058  0.858
    : 409138348.0  2020  0.845
    : 409138351.0  2009  0.816
    : 409138399.0  4982  0.979
    : 409138410.0  2196  0.836
    : 409138421.0  2414  0.879
    : 409138474.0  2015  0.880
    : 409138482.0  2393  0.936
    : 409138495.0  2623  0.916
    : 409138496.0  2093  0.863
    : 409138498.0  2093  0.838
    : 409138499.0  2978  0.903
    : 409138506.0  2887  0.907
    : 409138507.0  2540  0.907
    : 409138508.0  2363  0.910
    : 409138510.0  2273  0.879
    : 409138511.0  2563  0.873
    : 409138516.0  2436  0.899
    : 409138518.0  3658  0.901
    : 409138524.0  2427  0.870
    : 409138526.0  3778  0.918
    : 409138694.0  2074  0.850
    : 409138700.0  2140  0.811
    : 409138704.0  3036  0.926
    : 409138857.0  2579  0.938
    : 409138858.0  2756  0.916
    : 409138881.0  2452  0.862
    : 409138902.0  2620  0.847
    : 409138931.0  2018  0.804
    : 409138946.0  2266  0.857
    : 409138947.0  2338  0.911
    : 409138958.0  2019  0.816
    : 409138960.0  2154  0.849
    : 409138962.0  2192  0.858
    : 409138964.0  2610  0.892
    : 409138966.0  4111  0.917
    : 409138969.0  2300  0.866
    : 409138970.0  2626  0.947
    : 409138971.0  2706  0.937
    : 409138973.0  2476  0.908
    : 409138974.0  2020  0.830
    : 409138975.0  2185  0.887
    : 409138976.0  5207  0.967
    : 409139469.0  2223  0.897
    : 409139530.0  2012  0.830
    : 409139744.0  2109  0.879
    : 409139762.0  2090  0.821
    : 409139770.0  2773  0.915
    : 409139771.0  2762  0.922
    : 409139801.0  2043  0.862
    : 409139806.0  2775  0.883
    : 409139859.0  2046  0.805
    : 409139869.0  2168  0.872
    : 409139920.0  3350  0.889
    : 409139921.0  2063  0.974
    : 409140009.0  2349  0.862
    : 409140123.0  2587  0.878
    : 409143130.0  2626  0.852
    : 409143135.0  2096  0.829
    : 409143137.0  2188  0.822
    Total number of 1 second bins: 7035
    Bins with >0 counts          : 5153
    Bins with >2000 counts       : 193
    193 of 193 high count rate bins were dominated by noise
    Noise dominated 2.74% of total time, 3.75% of detector on time (defined as non-zero counts)


Locating noise-dominated data in quadrant 3
    : Time   totcounts   fraction
    : 409136195.0  2275  0.926
    : 409136196.0  2168  0.888
    : 409136198.0  2213  0.870
    : 409136199.0  2330  0.852
    : 409136200.0  2488  0.865
    : 409136202.0  2036  0.791
    : 409136204.0  2066  0.810
    : 409136339.0  2744  0.878
    : 409136340.0  2976  0.922
    : 409136342.0  2533  0.874
    : 409136343.0  2763  0.923
    : 409136344.0  2858  0.949
    : 409136345.0  2036  0.922
    : 409136346.0  2568  0.879
    : 409136347.0  2035  0.839
    : 409136364.0  2333  0.835
    : 409136916.0  3539  0.928
    : 409136918.0  3638  0.952
    : 409136980.0  2486  0.874
    : 409137170.0  2136  0.846
    : 409137902.0  2013  0.844
    : 409137903.0  2076  0.851
    : 409137904.0  2136  0.854
    : 409137980.0  2155  0.823
    : 409138016.0  2043  0.819
    : 409138017.0  2076  0.818
    : 409138021.0  2161  0.839
    : 409138022.0  2264  0.860
    : 409138025.0  2040  0.848
    : 409138027.0  2294  0.868
    : 409138029.0  2086  0.843
    : 409138034.0  2043  0.807
    : 409138042.0  2041  0.844
    : 409138048.0  2038  0.835
    : 409138049.0  2163  0.845
    : 409138051.0  2189  0.848
    : 409138052.0  2625  0.879
    : 409138053.0  2097  0.882
    : 409138054.0  2600  0.900
    : 409138055.0  2102  0.870
    : 409138056.0  2198  0.869
    : 409138057.0  2586  0.881
    : 409138058.0  2042  0.840
    : 409138059.0  2450  0.864
    : 409138060.0  2228  0.847
    : 409138061.0  2210  0.873
    : 409138062.0  2314  0.914
    : 409138063.0  2129  0.831
    : 409138064.0  2240  0.863
    : 409138065.0  2508  0.850
    : 409138066.0  2056  0.879
    : 409138067.0  2265  0.871
    : 409138068.0  2142  0.880
    : 409138069.0  2735  0.903
    : 409138070.0  2313  0.910
    : 409138071.0  2442  0.887
    : 409138072.0  2453  0.875
    : 409138073.0  2453  0.886
    : 409138074.0  2555  0.863
    : 409138075.0  2568  0.920
    : 409138076.0  2319  0.927
    : 409138077.0  2665  0.906
    : 409138078.0  2318  0.887
    : 409138079.0  2287  0.848
    : 409138080.0  2468  0.891
    : 409138081.0  2740  0.938
    : 409138082.0  2156  0.886
    : 409138083.0  2280  0.901
    : 409138084.0  2276  0.916
    : 409138085.0  2607  0.880
    : 409138086.0  2164  0.908
    : 409138087.0  2509  0.894
    : 409138088.0  2405  0.899
    : 409138089.0  2253  0.899
    : 409138090.0  2617  0.895
    : 409138091.0  2256  0.872
    : 409138092.0  2355  0.891
    : 409138094.0  2809  0.899
    : 409138095.0  2192  0.905
    : 409138096.0  2735  0.881
    : 409138097.0  2075  0.871
    : 409138098.0  2222  0.905
    : 409138099.0  2652  0.905
    : 409138100.0  2108  0.893
    : 409138101.0  2421  0.874
    : 409138102.0  2624  0.931
    : 409138103.0  2146  0.866
    : 409138105.0  2403  0.868
    : 409138108.0  2136  0.859
    : 409138125.0  2568  0.862
    : 409138126.0  2366  0.858
    : 409138127.0  2001  0.905
    : 409138128.0  2557  0.903
    : 409138129.0  2584  0.922
    : 409138130.0  2371  0.860
    : 409138131.0  2111  0.882
    : 409138133.0  2116  0.850
    : 409138135.0  2533  0.889
    : 409138136.0  2572  0.892
    : 409138137.0  2390  0.893
    : 409138138.0  2032  0.858
    : 409138139.0  2175  0.860
    : 409138140.0  2310  0.865
    : 409138141.0  2078  0.861
    : 409138142.0  2176  0.831
    : 409138143.0  2328  0.863
    : 409138144.0  2034  0.868
    : 409138149.0  2208  0.851
    : 409138152.0  2412  0.857
    : 409138153.0  2501  0.893
    : 409138154.0  2379  0.906
    : 409138155.0  2673  0.918
    : 409138157.0  2250  0.859
    : 409138160.0  2118  0.835
    : 409138161.0  2368  0.857
    : 409138164.0  2135  0.883
    : 409138165.0  2647  0.888
    : 409138166.0  2724  0.916
    : 409138167.0  2146  0.884
    : 409138168.0  2398  0.871
    : 409138169.0  2094  0.874
    : 409138170.0  2076  0.846
    : 409138171.0  2166  0.848
    : 409138172.0  2275  0.863
    : 409138173.0  2664  0.895
    : 409138174.0  2546  0.907
    : 409138175.0  2569  0.909
    : 409138176.0  2253  0.889
    : 409138177.0  2389  0.922
    : 409138178.0  2727  0.901
    : 409138179.0  2230  0.907
    : 409138180.0  2049  0.877
    : 409138181.0  2579  0.910
    : 409138182.0  2749  0.923
    : 409138183.0  2508  0.909
    : 409138184.0  2371  0.887
    : 409138185.0  2293  0.882
    : 409138186.0  2592  0.912
    : 409138187.0  2222  0.890
    : 409138188.0  2278  0.889
    : 409138189.0  2329  0.852
    : 409138190.0  2364  0.899
    : 409138191.0  2408  0.888
    : 409138192.0  2151  0.862
    : 409138193.0  2259  0.863
    : 409138194.0  2781  0.908
    : 409138195.0  2714  0.925
    : 409138196.0  2439  0.891
    : 409138199.0  2005  0.835
    : 409138201.0  2272  0.853
    : 409138202.0  2260  0.849
    : 409138204.0  2328  0.891
    : 409138205.0  2859  0.919
    : 409138206.0  2062  0.860
    : 409138209.0  2635  0.872
    : 409138210.0  2452  0.891
    : 409138211.0  2281  0.875
    : 409138212.0  2191  0.861
    : 409138216.0  2150  0.870
    : 409138217.0  2394  0.896
    : 409138218.0  2452  0.876
    : 409138225.0  2388  0.865
    : 409138226.0  2199  0.854
    : 409138237.0  2111  0.844
    : 409138443.0  2154  0.842
    : 409138480.0  2160  0.843
    : 409138606.0  2888  0.896
    : 409138653.0  2246  0.848
    : 409138901.0  2504  0.878
    : 409138902.0  2199  0.843
    : 409138915.0  2002  0.849
    : 409138928.0  2005  0.820
    : 409138954.0  2058  0.849
    : 409139952.0  2234  0.872
    : 409140388.0  2269  0.847
    : 409140389.0  2362  0.879
    : 409142466.0  2625  0.893
    : 409142467.0  2123  0.892
    : 409142468.0  2117  0.826
    : 409142469.0  2475  0.853
    : 409142470.0  2366  0.841
    : 409142471.0  2050  0.809
    : 409142472.0  2199  0.812
    : 409142475.0  2208  0.857
    : 409142477.0  3042  0.876
    : 409142487.0  4221  0.920
    : 409142489.0  2060  0.965
    : 409142542.0  2489  0.879
    : 409142544.0  2364  0.822
    : 409142551.0  2130  0.817
    : 409142584.0  2137  0.820
    : 409142586.0  2739  0.897
    : 409142587.0  2118  0.840
    : 409142588.0  3886  0.952
    : 409142590.0  2390  0.912
    : 409142594.0  2312  0.870
    : 409142595.0  2762  0.886
    : 409142596.0  2077  0.841
    : 409142616.0  2005  0.777
    : 409142617.0  2790  0.878
    : 409142619.0  2541  0.863
    : 409142620.0  2168  0.876
    : 409142621.0  2037  0.790
    : 409142623.0  2088  0.824
    : 409142624.0  2075  0.885
    : 409142631.0  2082  0.818
    : 409142654.0  2442  0.871
    : 409142655.0  2718  0.922
    : 409142656.0  2282  0.908
    : 409142662.0  2411  0.822
    : 409142667.0  2527  0.868
    : 409142668.0  2319  0.874
    : 409142670.0  2952  0.936
    : 409142671.0  2306  0.938
    : 409142676.0  2372  0.852
    : 409142677.0  2211  0.834
    : 409142680.0  2370  0.916
    : 409142681.0  4000  0.954
    : 409142683.0  2749  0.985
    : 409142684.0  2100  0.987
    : 409142687.0  3540  0.875
    : 409142688.0  2666  0.974
    : 409142690.0  2132  0.957
    : 409142691.0  2122  0.923
    : 409142692.0  2504  0.858
    : 409142693.0  3346  0.966
    : 409142695.0  2682  0.930
    : 409142696.0  3301  0.948
    : 409142697.0  3085  0.969
    : 409142700.0  2213  0.829
    : 409142701.0  2003  0.952
    : 409142703.0  2253  0.904
    : 409142705.0  2059  0.859
    : 409142706.0  2387  0.870
    : 409142708.0  2378  0.836
    : 409142710.0  2617  0.920
    : 409142716.0  2010  0.846
    : 409142717.0  2386  0.839
    : 409142721.0  2555  0.857
    : 409142760.0  2107  0.839
    : 409142804.0  2226  0.852
    : 409142805.0  2267  0.880
    : 409142806.0  2121  0.848
    : 409142826.0  2514  0.924
    : 409142872.0  2301  0.821
    : 409142873.0  2220  0.833
    : 409142874.0  2162  0.832
    : 409142876.0  2291  0.827
    : 409142886.0  2481  0.861
    : 409142889.0  4019  0.935
    : 409142892.0  3000  0.879
    : 409142893.0  2056  0.944
    : 409142901.0  2351  0.853
    : 409142902.0  2027  0.819
    : 409142959.0  2145  0.833
    : 409142960.0  2121  0.831
    : 409143019.0  2018  0.780
    : 409143020.0  2087  0.822
    : 409143028.0  2095  0.821
    : 409143050.0  2015  0.810
    : 409143053.0  2020  0.821
    : 409143054.0  2063  0.797
    : 409143069.0  2063  0.801
    : 409143070.0  2383  0.834
    : 409143072.0  2035  0.833
    : 409143077.0  2079  0.834
    : 409143078.0  2377  0.838
    : 409143079.0  2237  0.849
    : 409143081.0  2198  0.834
    : 409143083.0  2072  0.822
    : 409143087.0  2042  0.809
    : 409143094.0  2075  0.821
    : 409143098.0  2144  0.838
    : 409143099.0  2098  0.801
    : 409143100.0  2332  0.840
    : 409143112.0  2105  0.831
    : 409143135.0  2077  0.830
    : 409143136.0  2057  0.847
    : 409143138.0  2086  0.824
    : 409143146.0  2556  0.852
    : 409143148.0  2138  0.813
    : 409143149.0  2118  0.829
    : 409143150.0  2216  0.857
    : 409143153.0  2283  0.849
    : 409143154.0  2193  0.843
    : 409143156.0  2512  0.849
    : 409143157.0  2096  0.836
    : 409143158.0  2206  0.866
    : 409143159.0  2385  0.874
    : 409143160.0  2645  0.878
    : 409143161.0  2016  0.848
    : 409143162.0  2108  0.831
    : 409143169.0  2044  0.811
    : 409143217.0  2547  0.869
    : 409143219.0  2309  0.838
    Total number of 1 second bins: 7035
    Bins with >0 counts          : 5153
    Bins with >2000 counts       : 295
    295 of 295 high count rate bins were dominated by noise
    Noise dominated 4.19% of total time, 5.72% of detector on time (defined as non-zero counts)