ASTROSAT CZTI

Data Quality Report

Orbit 53820

Creation date: 2025-09-09T11:14:40.404952
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/AS1A14_022T04_9000006506_53820cztM0_level2.fits modeM0/AS1A14_022T04_9000006506_53820cztM0_level2_quad_clean.evt
Size (bytes)978,094,08066,839,040
Size932.8 MB 63.7 MB
Events in quadrant A14,380,304163,479
Events in quadrant B3,304,916642,373
Events in quadrant C5,517,613540,788
Events in quadrant D12,518,015239,070

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0470424
B0140081
C0207991
D0415286

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6276487177.613129%
B62791953.105590%
C627963910.176780%
D6278374659.668684%

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 7361 6276 4727 4727 64.22% 75.32%
B 7364 6280 56 56 0.76% 0.89%
C 7364 6280 535 535 7.27% 8.52%
D 7362 6277 3527 3527 47.91% 56.19%

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 3 63 12347165 110112.79 454 444 112.1
A 4 13 101276 899.26 454 444 112.1
A 0 8 59874 530.02 454 444 112.1
B 5 172 212677 1474.15 674 651 143.8
B 7 0 202290 1401.93 674 651 143.8
B 0 197 72934 502.56 674 651 143.8
C 15 224 1387737 7913.21 635 629 175.3
C 1 241 716289 4082.71 635 629 175.3
C 5 10 265916 1513.42 635 629 175.3
D 8 176 9136036 80940.58 394 377 112.9
D 2 172 904950 8014.38 394 377 112.9
D 3 12 314080 2779.36 394 377 112.9

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