ASTROSAT CZTI

Data Quality Report

Orbit 20180113_A04_201T01_9000001844_level2

Creation date: 2018-07-31T16:42:37.062645
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A04_201T01_9000001844cztM0_level2_bc.evt modeM0/AS1A04_201T01_9000001844cztM0_level2_quad_clean.evt
Size (bytes)1,601,867,520545,538,240
Size1.5 GB 520.3 MB
Events in quadrant A11,493,1853,412,954
Events in quadrant B12,981,1563,491,332
Events in quadrant C8,701,7823,456,169
Events in quadrant D12,436,7863,245,044

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0870
B0870
C0870
D0870

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08700
B08700
C08700
D08700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0995390
B01062420
C0877430
D01022340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A425005471.287059%
B4250018984.465882%
C425002110.496471%
D4250011572.722353%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 51406 42498 11 11 0.02% 0.03%
B 51406 42492 56 56 0.11% 0.13%
C 51406 42497 5 5 0.01% 0.01%
D 51406 42497 124 124 0.24% 0.29%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 13 251 1774359 3707.61 2192 2145 478.0
A 12 189 632708 1319.18 2192 2145 478.0
A 1 162 313616 651.62 2192 2145 478.0
B 4 239 3076340 7474.19 2186 2126 411.3
B 3 64 635210 1539.19 2186 2126 411.3
B 3 209 169649 407.29 2186 2126 411.3
C 15 208 188489 392.96 2163 2132 474.2
C 14 234 40002 79.85 2163 2132 474.2
C 1 16 18153 33.78 2163 2132 474.2
D 1 52 3023920 6211.1 2130 2056 486.5
D 8 195 362185 740.2 2130 2056 486.5
D 2 14 292566 597.11 2130 2056 486.5

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter