ASTROSAT CZTI

Data Quality Report

Orbit 20211025_A11_005T04_9000004742_level2

Creation date: 2021-10-28T16:39:21.770828
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1A11_005T04_9000004742cztM0_level2_bc.evt modeM0/AS1A11_005T04_9000004742cztM0_level2_quad_clean.evt
Size (bytes)5,275,802,8801,287,685,440
Size4.9 GB 1.2 GB
Events in quadrant A24,268,5498,265,618
Events in quadrant B33,449,4088,131,904
Events in quadrant C25,971,2558,336,868
Events in quadrant D69,183,0057,296,507

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04090
B04090
C04090
D04090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02165900
B02625900
C02185520
D03690060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020780
B020780
C020780
D020780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1018484190.411397%
B10172962276.121165%
C1018367190.706037%
D10125895899.469869%

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 144877 102451 34 34 0.02% 0.03%
B 144877 102335 176 176 0.12% 0.17%
C 144877 102450 105 105 0.07% 0.10%
D 144877 101884 2995 2995 2.07% 2.94%

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 14 63 2712540 2313.9 5388 5312 1170.0
A 9 143 359163 302.44 5388 5312 1170.0
A 13 6 195960 162.95 5388 5312 1170.0
B 5 172 9230780 8807.68 5359 5251 1047.4
B 0 197 976324 927.09 5359 5251 1047.4
B 0 230 606725 574.23 5359 5251 1047.4
C 3 233 1604383 1316.65 5353 5337 1214.5
C 0 10 1321680 1083.88 5353 5337 1214.5
C 14 67 1008680 826.15 5353 5337 1214.5
D 8 195 16640178 13573.62 5023 4910 1225.6
D 12 227 9211977 7512.55 5023 4910 1225.6
D 10 203 4246268 3460.76 5023 4910 1225.6

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