Locating noise-dominated data in quadrant 0
: Time totcounts fraction
: 447636522.0 2379 0.844
: 447636523.0 2272 0.866
: 447636529.0 2870 0.901
: 447636531.0 2509 0.847
: 447636534.0 2123 0.846
: 447636535.0 2011 0.821
: 447636536.0 2301 0.860
: 447636541.0 2288 0.849
: 447636549.0 2019 0.812
: 447636552.0 2828 0.865
: 447636554.0 2205 0.817
: 447637189.0 2572 0.869
: 447639854.0 2181 0.889
: 447642549.0 2132 0.841
: 447642555.0 2081 0.834
: 447644429.0 2241 0.876
: 447646697.0 3509 0.964
: 447647095.0 2076 0.868
: 447650734.0 2325 0.877
Total number of 1 second bins: 20652
Bins with >0 counts : 19326
Bins with >2000 counts : 19
19 of 19 high count rate bins were dominated by noise
Noise dominated 0.09% of total time, 0.10% of detector on time (defined as non-zero counts)
Locating noise-dominated data in quadrant 1
: Time totcounts fraction
: 447631790.0 2338 0.787
: 447631791.0 2256 0.837
: 447633778.0 2138 0.861
: 447633856.0 2578 0.880
: 447633878.0 2222 0.947
: 447633879.0 2185 0.913
: 447636157.0 2038 0.876
: 447636180.0 3245 0.915
: 447636182.0 2389 0.896
: 447636201.0 2048 0.818
: 447636202.0 2037 0.873
: 447636206.0 3410 0.978
: 447636207.0 2659 0.940
: 447636220.0 2472 0.866
: 447636224.0 2335 0.857
: 447636624.0 2038 0.816
: 447636640.0 2508 0.856
: 447636641.0 2576 0.946
: 447636647.0 2275 0.867
: 447639005.0 2243 0.894
: 447640124.0 2881 0.926
: 447640675.0 2513 0.883
: 447641992.0 2031 0.824
: 447641993.0 2073 0.956
: 447641994.0 2185 0.930
: 447641995.0 2429 0.977
: 447641997.0 2081 0.865
: 447642005.0 2605 0.857
: 447642016.0 2602 0.858
: 447642017.0 2628 0.913
: 447642042.0 2994 0.945
: 447642043.0 2571 0.952
: 447642044.0 2538 0.930
: 447642045.0 2085 0.874
: 447642047.0 2196 0.847
: 447642051.0 3631 0.941
: 447642052.0 2391 0.931
: 447642054.0 2333 0.916
: 447642160.0 2423 0.925
: 447642161.0 2267 0.921
: 447642162.0 2159 0.897
: 447642751.0 2321 0.863
: 447642752.0 2738 0.940
: 447644703.0 2928 0.929
: 447645259.0 2151 0.835
: 447645347.0 2365 0.879
: 447645348.0 2160 0.903
: 447645350.0 2534 0.862
: 447645351.0 2237 0.906
: 447645363.0 2088 0.860
: 447645432.0 2961 0.897
: 447645447.0 2376 0.862
: 447645462.0 2142 0.838
: 447645878.0 2642 0.903
: 447645983.0 2681 0.881
: 447646133.0 2177 0.843
: 447646136.0 2760 0.900
: 447646138.0 2086 0.853
: 447647388.0 2915 0.897
: 447647802.0 2826 0.902
: 447647804.0 2613 0.875
: 447647806.0 2504 0.937
: 447647814.0 2175 0.833
: 447647816.0 2075 0.835
: 447647822.0 2029 0.854
: 447647823.0 2859 0.925
: 447647824.0 2055 0.928
: 447647825.0 2465 0.922
: 447647826.0 2462 0.972
: 447647828.0 2028 0.840
: 447647829.0 2284 0.879
: 447647830.0 2693 0.952
: 447647831.0 2727 0.955
: 447647832.0 2715 0.961
: 447647833.0 2650 0.935
: 447647834.0 2668 0.943
: 447647835.0 2025 0.892
: 447647836.0 2063 0.938
: 447647837.0 2016 0.946
: 447647838.0 2101 0.909
: 447647839.0 2516 0.980
: 447647842.0 2125 0.882
: 447647843.0 2068 0.901
: 447647844.0 2239 0.926
: 447647845.0 2333 0.901
: 447647846.0 2485 0.987
: 447647847.0 2461 0.941
: 447647848.0 2335 0.930
: 447647850.0 2133 0.829
: 447647851.0 2332 0.988
: 447647852.0 2088 0.967
: 447647853.0 2046 0.996
: 447647854.0 2451 1.000
: 447647855.0 2210 1.000
: 447647856.0 2640 0.959
: 447647857.0 2442 0.981
: 447647858.0 2730 0.984
: 447647859.0 2472 0.930
: 447647860.0 2669 0.970
: 447647861.0 2582 0.964
: 447647862.0 2542 0.970
: 447647863.0 2610 0.986
: 447647864.0 2511 0.988
: 447647865.0 2427 1.000
: 447647866.0 2499 0.985
: 447647867.0 2352 0.979
: 447647868.0 2435 0.990
: 447647869.0 2370 0.976
: 447647870.0 2322 0.956
: 447647871.0 2594 0.995
: 447647872.0 2655 0.967
: 447647873.0 2436 0.985
: 447647874.0 2407 0.999
: 447647875.0 2579 0.986
: 447647876.0 2407 0.989
: 447647877.0 2534 0.970
: 447647878.0 2359 0.976
: 447647879.0 2525 0.958
: 447647882.0 2206 0.850
: 447647884.0 2606 0.888
: 447647885.0 2224 0.919
: 447647886.0 2339 0.926
: 447647887.0 2494 0.962
: 447647888.0 2334 0.962
: 447647894.0 2664 0.920
: 447647928.0 2213 0.908
: 447647929.0 2531 0.985
: 447647930.0 2283 0.945
: 447647931.0 2450 0.929
: 447647932.0 2205 0.944
: 447647933.0 2102 0.922
: 447647958.0 2819 0.888
: 447647959.0 2070 0.871
: 447647960.0 2281 0.890
: 447647982.0 2334 0.840
: 447647985.0 2300 0.861
: 447647986.0 2262 0.913
: 447648005.0 2182 0.847
: 447648006.0 2281 0.940
: 447648019.0 2668 0.916
: 447648020.0 2734 0.986
: 447648021.0 2173 0.930
: 447648037.0 2380 0.847
: 447648040.0 2561 0.873
: 447648420.0 2474 0.863
: 447648421.0 2179 0.897
: 447648422.0 2448 0.929
: 447648424.0 2834 0.950
: 447648425.0 2661 0.938
: 447648426.0 2386 0.945
: 447648427.0 2726 0.959
: 447648428.0 2647 0.964
: 447649538.0 3310 0.931
: 447649539.0 2454 0.937
: 447649540.0 2531 0.951
: 447649541.0 2747 0.952
: 447649542.0 2100 0.892
: 447649543.0 2202 0.920
: 447649544.0 2620 0.950
Total number of 1 second bins: 20652
Bins with >0 counts : 19327
Bins with >2000 counts : 159
159 of 159 high count rate bins were dominated by noise
Noise dominated 0.77% of total time, 0.82% of detector on time (defined as non-zero counts)
Locating noise-dominated data in quadrant 2
: Time totcounts fraction
: 447631873.0 2517 0.835
: 447632017.0 2033 0.828
: 447632018.0 2561 0.938
: 447632480.0 2095 0.905
: 447632481.0 2264 0.896
: 447632790.0 2469 0.859
: 447632929.0 2217 0.849
: 447632930.0 2369 0.906
: 447632945.0 3369 0.918
: 447632948.0 2583 0.895
: 447632971.0 2187 0.842
: 447633387.0 2179 0.858
: 447633388.0 2038 0.822
: 447636684.0 2890 0.908
: 447636685.0 2135 0.979
: 447636686.0 2341 0.990
: 447636687.0 2176 1.000
: 447636714.0 2666 0.850
: 447636717.0 3090 0.953
: 447636718.0 2465 0.932
: 447636922.0 2024 0.856
: 447638132.0 2035 0.743
: 447640232.0 2164 0.872
: 447640348.0 3148 0.943
: 447643851.0 2230 0.800
: 447644435.0 2064 0.769
: 447644681.0 3311 0.960
: 447644683.0 2771 0.890
: 447644727.0 2394 0.877
: 447645724.0 2804 0.895
: 447645823.0 2867 0.897
: 447645824.0 2443 0.929
: 447645825.0 2553 0.943
: 447645826.0 2633 0.946
: 447645827.0 2068 0.911
: 447645830.0 2548 0.898
: 447645843.0 2196 0.859
: 447645846.0 2545 0.878
: 447645848.0 2076 0.873
: 447645851.0 3519 0.934
: 447645852.0 2046 0.893
: 447645854.0 3106 0.931
: 447645857.0 2810 0.890
: 447645860.0 2395 0.914
: 447645869.0 2006 0.847
: 447645870.0 2095 0.880
: 447645871.0 2583 0.936
: 447645873.0 2462 0.879
: 447645875.0 2377 0.871
: 447645876.0 2721 0.914
: 447645877.0 2872 0.961
: 447645880.0 2431 0.866
: 447645887.0 2235 0.861
: 447645896.0 2609 0.906
: 447645899.0 2216 0.906
: 447645902.0 2915 0.920
: 447645903.0 2547 0.930
: 447645904.0 2690 0.965
: 447645906.0 3384 0.928
: 447645909.0 2959 0.911
: 447645911.0 2179 0.876
: 447645912.0 3525 0.946
: 447645913.0 2567 0.928
: 447645914.0 2724 0.966
: 447645915.0 2695 0.954
: 447645916.0 2690 0.967
: 447645917.0 2473 0.968
: 447645918.0 2480 0.916
: 447645920.0 2183 0.857
: 447645921.0 2347 0.889
: 447645924.0 2110 0.848
: 447645931.0 3518 0.924
: 447645936.0 3028 1.000
: 447646270.0 2070 0.856
: 447646830.0 3418 0.975
: 447646906.0 2227 0.868
: 447647262.0 2387 0.894
: 447647264.0 3967 0.974
: 447647265.0 2859 0.974
: 447647266.0 2543 0.956
: 447647267.0 2826 0.956
: 447647268.0 2681 0.927
: 447647271.0 3621 0.926
: 447647272.0 2914 0.984
: 447647274.0 3005 0.938
: 447647276.0 3231 0.925
: 447647278.0 3849 0.956
: 447647281.0 2997 0.942
: 447647282.0 2442 0.964
: 447647284.0 2164 0.860
: 447647286.0 3514 0.944
: 447647291.0 2809 0.910
: 447647292.0 2912 0.981
: 447648107.0 2086 0.834
: 447648108.0 2486 0.902
: 447648109.0 2554 0.926
: 447648321.0 2155 0.841
: 447648323.0 2149 0.840
: 447649460.0 2171 0.827
: 447649461.0 2038 0.815
: 447649462.0 2651 0.876
: 447649464.0 3062 0.956
: 447649466.0 2723 0.893
: 447649467.0 2557 0.967
: 447649468.0 2411 0.993
: 447649469.0 2350 0.901
: 447649470.0 2319 0.879
: 447649491.0 2082 0.814
: 447652156.0 3807 0.920
: 447652199.0 2254 0.885
Total number of 1 second bins: 20653
Bins with >0 counts : 19328
Bins with >2000 counts : 110
110 of 110 high count rate bins were dominated by noise
Noise dominated 0.53% of total time, 0.57% of detector on time (defined as non-zero counts)
Locating noise-dominated data in quadrant 3
: Time totcounts fraction
: 447631668.0 2319 0.811
: 447631946.0 2171 0.785
: 447632010.0 2037 0.809
: 447632444.0 2652 0.879
: 447632446.0 2289 0.860
: 447632448.0 2091 0.821
: 447632791.0 2549 0.880
: 447632792.0 2239 0.890
: 447632793.0 2925 0.929
: 447632798.0 2721 0.877
: 447632814.0 3974 0.960
: 447632815.0 2495 0.921
: 447632883.0 2985 0.900
: 447632969.0 2337 0.863
: 447632971.0 2581 0.872
: 447632976.0 2296 0.865
: 447633074.0 3194 0.963
: 447633075.0 2789 0.956
: 447633091.0 3179 0.921
: 447633092.0 2708 0.945
: 447633093.0 2554 0.940
: 447633188.0 2245 0.880
: 447633437.0 3292 0.961
: 447633438.0 2828 0.961
: 447633439.0 2897 0.972
: 447633440.0 2844 0.948
: 447633644.0 2820 0.959
: 447633738.0 3051 0.912
: 447633795.0 2563 0.914
: 447633798.0 2197 0.875
: 447633800.0 2264 0.881
: 447634065.0 4107 0.968
: 447634229.0 2389 0.881
: 447634230.0 2006 0.863
: 447634878.0 2004 0.841
: 447634921.0 3034 0.939
: 447634922.0 2687 0.970
: 447634986.0 2581 0.886
: 447634989.0 2309 0.882
: 447634990.0 2079 0.890
: 447634991.0 2472 0.908
: 447635000.0 2012 0.862
: 447635001.0 2612 0.910
: 447635002.0 2790 0.953
: 447635004.0 2737 0.910
: 447635028.0 2078 0.881
: 447635034.0 2253 0.865
: 447635063.0 2127 0.881
: 447635064.0 2187 0.874
: 447635301.0 3440 0.940
: 447635302.0 2549 0.970
: 447635425.0 3040 0.959
: 447635492.0 2226 0.862
: 447635786.0 2144 0.848
: 447636356.0 2337 0.864
: 447636394.0 3200 0.904
: 447636560.0 2003 0.831
: 447636877.0 2511 0.859
: 447637037.0 2944 0.845
: 447637038.0 2074 0.869
: 447637040.0 2791 0.875
: 447637041.0 2265 0.876
: 447637044.0 2713 0.863
: 447637045.0 2362 0.903
: 447637046.0 2302 0.872
: 447637058.0 2390 0.851
: 447637059.0 2749 0.870
: 447637068.0 2258 0.821
: 447637069.0 2688 0.918
: 447637070.0 2463 0.878
: 447637072.0 2586 0.838
: 447637073.0 2751 0.904
: 447637074.0 2431 0.931
: 447637075.0 2625 0.920
: 447637076.0 2600 0.928
: 447637077.0 2016 0.862
: 447637078.0 2550 0.884
: 447637079.0 2291 0.858
: 447637080.0 2161 0.908
: 447637085.0 2484 0.864
: 447637087.0 2009 0.821
: 447637088.0 2836 0.877
: 447637089.0 2585 0.915
: 447637090.0 2460 0.889
: 447637091.0 2118 0.857
: 447637093.0 3028 0.865
: 447637097.0 2622 0.851
: 447637100.0 2222 0.825
: 447637103.0 2145 0.839
: 447637105.0 2665 0.852
: 447637112.0 2396 0.849
: 447637113.0 2298 0.872
: 447637115.0 2276 0.856
: 447637118.0 2394 0.844
: 447637120.0 2122 0.801
: 447637145.0 2009 0.838
: 447637146.0 2725 0.867
: 447637157.0 2774 0.850
: 447637158.0 2030 0.856
: 447637160.0 2237 0.815
: 447637166.0 2306 0.833
: 447637168.0 2169 0.821
: 447637169.0 2183 0.844
: 447637171.0 2372 0.860
: 447637172.0 2271 0.904
: 447637173.0 2397 0.910
: 447637176.0 2598 0.867
: 447637179.0 2496 0.856
: 447637180.0 2757 0.904
: 447637184.0 2676 0.865
: 447637203.0 2159 0.826
: 447637378.0 2346 0.847
: 447637419.0 2193 0.846
: 447637445.0 2720 0.877
: 447637446.0 2935 0.909
: 447637447.0 2690 0.956
: 447637760.0 2357 0.801
: 447638049.0 2107 0.860
: 447638059.0 2441 0.757
: 447638098.0 2044 0.684
: 447638119.0 2593 0.777
: 447638400.0 2815 0.879
: 447638405.0 2179 0.807
: 447638454.0 2626 0.896
: 447638456.0 2195 0.838
: 447638467.0 2900 0.932
: 447638468.0 2215 0.927
: 447638469.0 2216 0.896
: 447638471.0 3050 0.917
: 447638476.0 2324 0.849
: 447638478.0 2189 0.837
: 447638510.0 2496 0.909
: 447638511.0 2228 0.958
: 447638523.0 2289 0.830
: 447638524.0 2732 0.960
: 447638525.0 2771 0.953
: 447638526.0 2806 0.974
: 447638527.0 2731 0.974
: 447638528.0 2723 0.975
: 447638529.0 2715 0.969
: 447638530.0 2607 0.974
: 447638531.0 2661 0.972
: 447638532.0 2287 0.951
: 447638533.0 2702 0.977
: 447638534.0 2668 0.950
: 447638535.0 2557 0.953
: 447638536.0 2668 0.959
: 447638537.0 2534 0.956
: 447638538.0 2659 0.962
: 447638539.0 2436 0.963
: 447638540.0 2553 0.966
: 447638541.0 2636 0.953
: 447638542.0 2314 0.945
: 447638543.0 2507 0.976
: 447638544.0 2475 0.968
: 447638545.0 2555 0.959
: 447638546.0 2573 0.972
: 447638547.0 2721 0.983
: 447638548.0 2660 0.983
: 447638549.0 2469 0.969
: 447638550.0 2674 0.973
: 447638551.0 2492 0.917
: 447638552.0 2569 0.962
: 447638553.0 2061 0.968
: 447638554.0 2464 0.931
: 447638555.0 2565 0.931
: 447638556.0 2562 0.969
: 447638557.0 2579 0.951
: 447638574.0 2671 0.915
: 447638576.0 3060 0.901
: 447638577.0 2384 0.904
: 447638578.0 2349 0.936
: 447638579.0 2828 0.959
: 447638580.0 2860 0.977
: 447638755.0 2465 0.880
: 447638759.0 2046 0.835
: 447638779.0 2842 0.892
: 447638780.0 2753 0.930
: 447638781.0 2458 0.901
: 447638782.0 2341 0.884
: 447638799.0 2784 0.941
: 447638813.0 2301 0.865
: 447639133.0 2614 0.879
: 447639134.0 2120 0.914
: 447639143.0 3289 0.959
: 447639145.0 3058 0.912
: 447639146.0 2718 0.965
: 447639147.0 2455 0.965
: 447639148.0 2661 0.981
: 447639149.0 2557 0.985
: 447639150.0 2542 0.971
: 447639151.0 2528 0.939
: 447639152.0 2112 0.986
: 447639153.0 2074 0.979
: 447639154.0 2495 0.997
: 447639155.0 2492 0.993
: 447639156.0 2569 0.961
: 447639157.0 2514 0.990
: 447639158.0 2373 0.976
: 447639159.0 2406 0.929
: 447639160.0 2564 0.931
: 447639161.0 2380 0.972
: 447639162.0 2511 0.965
: 447639163.0 2406 0.961
: 447639164.0 2736 0.948
: 447639165.0 2478 0.923
: 447639168.0 2953 0.914
: 447639170.0 2295 0.917
: 447640458.0 2154 0.862
: 447640971.0 2177 0.885
: 447642182.0 2180 0.857
: 447642290.0 2055 0.835
: 447642296.0 2443 0.862
: 447642297.0 2078 0.882
: 447642336.0 2062 0.837
: 447642416.0 2828 0.929
: 447642959.0 2561 0.857
: 447644867.0 2219 0.869
: 447644872.0 2773 0.899
: 447646151.0 2777 0.909
: 447646160.0 2689 0.900
: 447648079.0 2573 0.926
: 447648080.0 2778 0.993
: 447648081.0 2618 0.988
: 447648082.0 2576 0.960
: 447648095.0 3125 0.932
: 447648156.0 2093 0.768
: 447648255.0 3450 0.952
: 447648256.0 2646 0.976
: 447648257.0 2360 0.921
: 447648258.0 2538 0.965
: 447648259.0 2529 0.976
: 447648260.0 2484 0.961
: 447648261.0 2529 0.973
: 447648262.0 2287 0.923
: 447648263.0 2180 0.958
: 447648264.0 2334 0.945
: 447648265.0 2554 0.976
: 447648266.0 2262 0.968
: 447648267.0 2222 0.915
: 447648268.0 2497 0.938
: 447648270.0 3025 0.919
: 447648271.0 2285 0.891
: 447648272.0 2533 0.889
: 447648273.0 2415 0.960
: 447648274.0 2742 0.969
: 447648275.0 2691 0.971
: 447648276.0 2408 0.995
: 447648277.0 2457 0.939
: 447648278.0 2238 0.927
: 447648279.0 2304 0.919
: 447648280.0 2431 0.961
: 447648281.0 2474 0.987
: 447648282.0 2393 0.982
: 447648283.0 2418 0.991
: 447648284.0 2314 0.987
: 447648285.0 2457 0.965
: 447648286.0 2481 0.946
: 447648287.0 2405 0.976
: 447648289.0 2423 0.953
: 447648290.0 2270 0.939
: 447648291.0 2435 0.959
: 447648292.0 2433 0.979
: 447648293.0 2555 0.981
: 447648294.0 2391 0.940
: 447648295.0 2615 0.980
: 447648296.0 2577 0.983
: 447648297.0 2170 0.985
: 447648298.0 2425 0.994
: 447648299.0 2216 0.967
: 447648300.0 2533 0.987
: 447648301.0 2573 0.977
: 447648302.0 2501 0.974
: 447648303.0 2656 0.982
: 447648304.0 2462 0.941
: 447648305.0 2627 0.973
: 447648306.0 2490 0.991
: 447648307.0 2490 0.964
: 447648308.0 2587 0.986
: 447648309.0 2422 0.957
: 447648310.0 2582 0.988
: 447648311.0 2507 0.996
: 447648312.0 2410 0.963
: 447648313.0 2382 0.967
: 447648422.0 2146 0.835
: 447648458.0 2616 0.921
: 447648459.0 2626 0.944
: 447648460.0 2633 0.996
: 447648461.0 2662 0.997
: 447648462.0 2691 0.985
: 447648463.0 2705 0.984
: 447648464.0 2689 1.000
: 447648465.0 2386 0.920
: 447648466.0 2500 0.969
: 447648467.0 2576 0.981
: 447648468.0 2540 0.996
: 447648469.0 2315 1.000
: 447648471.0 2407 0.867
: 447648473.0 2695 0.967
: 447648474.0 2737 0.966
: 447648475.0 2325 0.917
: 447648840.0 2478 0.872
: 447648858.0 3782 0.985
: 447648861.0 2490 0.869
: 447648896.0 2462 0.842
: 447648900.0 2174 0.825
: 447648904.0 2051 0.825
: 447649057.0 3024 0.965
: 447649058.0 2786 0.955
: 447649059.0 2530 0.923
: 447649060.0 2320 0.911
: 447649061.0 2191 0.890
: 447649065.0 2755 0.880
: 447649070.0 2256 0.852
: 447650035.0 2244 0.764
: 447650036.0 2241 0.844
: 447650039.0 2311 0.780
: 447651544.0 3687 0.933
: 447652051.0 2357 0.880
: 447652231.0 2373 0.855
: 447652246.0 2259 0.963
: 447652247.0 2541 0.971
: 447652248.0 2136 0.957
: 447652249.0 2493 0.951
: 447652254.0 2248 1.000
: 447652255.0 2292 0.987
: 447652256.0 2477 0.987
: 447652257.0 2198 0.985
: 447652259.0 2131 0.995
: 447652261.0 2216 0.929
: 447652262.0 2658 0.971
: 447652263.0 2318 0.959
: 447652264.0 2591 0.995
: 447652265.0 2024 1.000
: 447652266.0 2387 0.970
: 447652267.0 2308 0.997
: 447652268.0 2460 0.954
: 447652269.0 2389 0.946
: 447652270.0 2625 0.977
: 447652271.0 2364 0.965
: 447652272.0 2057 0.907
: 447652280.0 2302 0.873
: 447652281.0 2846 0.944
: 447652282.0 2095 0.988
: 447652283.0 2399 0.942
: 447652284.0 2351 0.967
: 447652285.0 2497 0.948
: 447652286.0 2222 1.000
: 447652287.0 2024 0.945
: 447652288.0 2523 1.000
: 447652290.0 2822 0.938
: 447652291.0 2109 1.000
: 447652295.0 2480 0.883
: 447652299.0 2704 0.914
: 447652300.0 2331 0.970
: 447652301.0 2302 0.964
: 447652302.0 2132 0.994
: 447652303.0 2300 0.962
: 447652304.0 2467 0.960
: 447652305.0 2441 0.970
: 447652306.0 2403 0.994
Total number of 1 second bins: 20652
Bins with >0 counts : 19327
Bins with >2000 counts : 361
361 of 361 high count rate bins were dominated by noise
Noise dominated 1.75% of total time, 1.87% of detector on time (defined as non-zero counts)