ASTROSAT CZTI

Data Quality Report

Orbit 20210316_C05_019T01_9000004264_level2

Creation date: 2021-03-22T16:42:11.533018
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/AS1C05_019T01_9000004264cztM0_level2_bc.evt modeM0/AS1C05_019T01_9000004264cztM0_level2_quad_clean.evt
Size (bytes)4,166,147,5201,635,048,000
Size3.9 GB 1.5 GB
Events in quadrant A20,869,65810,897,265
Events in quadrant B24,967,48411,198,886
Events in quadrant C21,099,94510,524,002
Events in quadrant D52,466,69710,092,409

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020260
B020260
C020260
D020260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02047440
B02185750
C02148960
D03146200

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01810
B01810
C01810
D01810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A994068960.901354%
B9940614131.421443%
C9940664406.478482%
D9940678847.931111%

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 117436 99411 4 4 0.00% 0.00%
B 117436 99408 26 26 0.02% 0.03%
C 117436 99354 1 1 0.00% 0.00%
D 117436 99407 1468 1468 1.25% 1.48%

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 179363 151.83 5359 5285 1146.5
A 0 13 139099 116.71 5359 5285 1146.5
A 0 226 33774 24.85 5359 5285 1146.5
B 0 189 3239317 3155.16 5463 5345 1025.0
B 0 190 279809 267.78 5463 5345 1025.0
B 0 156 189126 179.3 5463 5345 1025.0
C 14 254 734963 601.51 5106 5107 1213.4
C 3 233 222737 179.36 5106 5107 1213.4
C 9 54 194323 155.94 5106 5107 1213.4
D 8 195 9978511 8459.36 5126 4970 1179.0
D 12 33 9274554 7862.27 5126 4970 1179.0
D 13 104 4839817 4100.82 5126 4970 1179.0

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