ASTROSAT CZTI

Data Quality Report

Orbit 57781

Creation date: 2026-06-03T01:08:23.514448
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_083T16_9000006580_57781cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57781cztM0_level2_quad_clean.evt
Size (bytes)607,337,28087,779,520
Size579.2 MB 83.7 MB
Events in quadrant A5,691,961543,292
Events in quadrant B3,871,374645,341
Events in quadrant C7,855,589489,379
Events in quadrant D4,563,691530,441

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0211481
B0160821
C0277841
D0181331

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A644083813.012422%
B64401061.645963%
C6440124419.316770%
D64403034.704969%

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 7305 6440 691 691 9.46% 10.73%
B 7305 6441 43 43 0.59% 0.67%
C 7305 6440 974 974 13.33% 15.12%
D 7305 6441 290 290 3.97% 4.50%

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 14 2975173 18633.75 638 622 159.6
A 3 128 207697 1297.2 638 622 159.6
A 4 158 11924 70.8 638 622 159.6
B 4 80 874386 6099.01 670 646 143.3
B 10 247 104162 722.58 670 646 143.3
B 4 201 47781 329.02 670 646 143.3
C 9 38 2846825 17151.62 606 599 165.9
C 15 224 1912746 11522.77 606 599 165.9
C 4 5 623826 3755.62 606 599 165.9
D 8 160 972035 5326.6 644 615 182.4
D 2 153 389814 2134.1 644 615 182.4
D 3 12 313991 1718.34 644 615 182.4

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