ASTROSAT CZTI

Data Quality Report

Orbit 56520

Creation date: 2026-03-10T03:25:45.108294
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_060T01_9000006556_56520cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56520cztM0_level2_quad_clean.evt
Size (bytes)644,342,40087,811,200
Size614.5 MB 83.7 MB
Events in quadrant A6,678,233559,237
Events in quadrant B3,835,389659,728
Events in quadrant C7,180,464495,657
Events in quadrant D5,672,837507,113

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0241532
B0156732
C0257392
D0212612

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A626178212.490018%
B62612093.338125%
C6261122219.517649%
D626163810.190065%

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 7456 6261 690 690 9.25% 11.02%
B 7456 6261 101 101 1.35% 1.61%
C 7456 6262 1276 1276 17.11% 20.38%
D 7456 6262 620 620 8.32% 9.90%

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 7 64 2615486 15935.81 661 645 164.1
A 0 12 877889 5346.25 661 645 164.1
A 4 95 161914 982.83 661 645 164.1
B 4 206 667936 4550.98 684 660 146.6
B 7 252 123929 840.72 684 660 146.6
B 0 63 89290 604.48 684 660 146.6
C 15 230 3949252 23339.9 617 615 169.2
C 12 252 543931 3211.47 617 615 169.2
C 6 223 157719 928.62 617 615 169.2
D 8 129 917444 5114.07 623 595 179.3
D 7 96 730099 4069.08 623 595 179.3
D 2 249 588826 3281.08 623 595 179.3

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