ASTROSAT CZTI

Data Quality Report

Orbit 20210202_A10_082T04_9000004150_level2

Creation date: 2021-02-06T19:45:02.556364
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/AS1A10_082T04_9000004150cztM0_level2_bc.evt modeM0/AS1A10_082T04_9000004150cztM0_level2_quad_clean.evt
Size (bytes)3,161,646,720798,160,320
Size2.9 GB 761.2 MB
Events in quadrant A12,753,3575,155,323
Events in quadrant B13,362,2715,295,641
Events in quadrant C13,173,5935,059,466
Events in quadrant D52,324,6764,494,135

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012420
B012420
C012420
D012420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01262250
B01283800
C01299950
D02538030

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0870
B0870
C0870
D0870

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A607506421.056790%
B607509361.540741%
C6075017652.905350%
D607501478424.335802%

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 69539 60751 0 0 0.00% 0.00%
B 69539 60749 9 9 0.01% 0.01%
C 69539 60748 28 28 0.04% 0.05%
D 69539 60749 9288 9288 13.36% 15.29%

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 1 113 170066 240.88 3210 3152 692.9
A 13 254 97018 135.46 3210 3152 692.9
A 5 98 84818 117.85 3210 3152 692.9
B 10 245 587989 944.07 3262 3182 619.5
B 5 255 56937 86.78 3262 3182 619.5
B 0 230 51254 77.6 3262 3182 619.5
C 3 233 850320 1159.41 3101 3087 730.7
C 2 16 162829 218.6 3101 3087 730.7
C 14 254 130732 174.68 3101 3087 730.7
D 8 195 31447040 47569.58 2861 2768 661.0
D 1 52 9205461 13922.04 2861 2768 661.0
D 12 79 329175 493.8 2861 2768 661.0

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