ASTROSAT CZTI

Data Quality Report

Orbit 57436

Creation date: 2026-05-10T18:31:09.885817
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_102T01_9000006572_57436cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57436cztM0_level2_quad_clean.evt
Size (bytes)480,882,24087,808,320
Size458.6 MB 83.7 MB
Events in quadrant A4,282,225592,088
Events in quadrant B2,738,304639,589
Events in quadrant C7,019,429468,034
Events in quadrant D3,292,742538,481

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170351
B0125661
C0250611
D0142371

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60212924.849693%
B6022811.345068%
C6022135722.534042%
D60221352.241780%

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 7130 6020 54 54 0.76% 0.90%
B 7131 6021 5 5 0.07% 0.08%
C 7131 6021 1238 1238 17.36% 20.56%
D 7131 6021 73 73 1.02% 1.21%

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 0 12 1472218 9109.26 661 645 161.5
A 3 14 101215 622.54 661 645 161.5
A 7 64 82822 508.69 661 645 161.5
B 10 247 38748 274.93 648 623 138.7
B 7 252 33875 239.79 648 623 138.7
B 5 185 24074 169.11 648 623 138.7
C 14 245 2157555 13598.31 577 572 158.6
C 15 224 1980474 12481.94 577 572 158.6
C 13 3 349899 2202.27 577 572 158.6
D 15 142 262084 1449.48 639 610 180.4
D 2 249 195879 1082.47 639 610 180.4
D 7 96 71104 390.78 639 610 180.4

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