ASTROSAT CZTI

Data Quality Report

Orbit 55783

Creation date: 2026-01-19T18:16:23.592669
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_099T04_9000006540_55783cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55783cztM0_level2_quad_clean.evt
Size (bytes)344,030,40049,124,160
Size328.1 MB 46.8 MB
Events in quadrant A3,437,627313,422
Events in quadrant B1,889,942358,711
Events in quadrant C1,626,604322,541
Events in quadrant D5,495,636233,680

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0127830
B077780
C080040
D0188480

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0740
B0740
C0740
D0740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A36582777.572444%
B365830.082012%
C3659772.104400%
D3659103628.313747%

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 3658 3658 230 230 6.29% 6.29%
B 3658 3658 3 3 0.08% 0.08%
C 3659 3659 78 78 2.13% 2.13%
D 3659 3659 1152 1152 31.48% 31.48%

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 15 32 957077 11006.86 348 339 86.9
A 7 64 649778 7471.52 348 339 86.9
A 12 115 303287 3485.29 348 339 86.9
B 5 172 456911 5885.28 354 341 77.6
B 10 247 17062 215.54 354 341 77.6
B 5 236 15182 191.3 354 341 77.6
C 15 199 186289 1919.35 345 340 96.9
C 12 250 57225 587.16 345 340 96.9
C 6 223 23000 233.89 345 340 96.9
D 11 129 3889626 43294.22 308 292 89.8
D 7 70 207382 2305.23 308 292 89.8
D 8 245 65576 726.71 308 292 89.8

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