ASTROSAT CZTI

Data Quality Report

Orbit 20210826_A10_094T34_9000004662_level2

Creation date: 2021-08-27T15:29:26.879675
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/AS1A10_094T34_9000004662cztM0_level2_bc.evt modeM0/AS1A10_094T34_9000004662cztM0_level2_quad_clean.evt
Size (bytes)887,100,480270,141,120
Size846.0 MB 257.6 MB
Events in quadrant A3,859,1051,818,333
Events in quadrant B8,534,4591,805,400
Events in quadrant C6,686,4951,730,307
Events in quadrant D6,670,7161,701,486

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0344620
B0509080
C0470770
D0458390

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0360
B0360
C0360
D0360

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03320
B03320
C03320
D03320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A163331270.777567%
B163333852.357191%
C1633310526.440948%
D163339185.620523%

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 19898 16330 0 0 0.00% 0.00%
B 19898 16330 10 10 0.05% 0.06%
C 19898 16331 14 14 0.07% 0.09%
D 19898 16329 28 28 0.14% 0.17%

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 13 254 29979 138.99 987 975 208.7
A 14 238 19098 86.85 987 975 208.7
A 13 6 16565 74.71 987 975 208.7
B 6 159 4248536 23080.88 976 960 184.0
B 5 172 209930 1135.52 976 960 184.0
B 0 190 123314 664.86 976 960 184.0
C 3 233 1801141 7987.09 940 941 225.4
C 0 10 1136289 5037.29 940 941 225.4
C 14 254 37300 161.32 940 941 225.4
D 13 249 1397844 6237.98 969 944 223.9
D 8 195 726970 3242.14 969 944 223.9
D 12 218 423100 1885.18 969 944 223.9

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