ASTROSAT CZTI

Data Quality Report

Orbit 55706

Creation date: 2026-01-15T11:15:17.933779
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_55706cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55706cztM0_level2_quad_clean.evt
Size (bytes)482,849,28093,611,520
Size460.5 MB 89.3 MB
Events in quadrant A7,318,359523,035
Events in quadrant B3,074,141680,442
Events in quadrant C3,172,671612,996
Events in quadrant D3,801,396563,511

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0262662
B0139122
C0142552
D0159373

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6520126219.355828%
B6520681.042945%
C6520550.843558%
D65191672.561743%

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 7666 6520 1121 1121 14.62% 17.19%
B 7666 6520 31 31 0.40% 0.48%
C 7666 6521 52 52 0.68% 0.80%
D 7665 6520 153 153 2.00% 2.35%

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 3756938 23846.48 640 625 157.5
A 5 241 528384 3350.41 640 625 157.5
A 0 8 233775 1480.12 640 625 157.5
B 0 173 116686 776.4 693 668 149.4
B 0 182 81396 540.24 693 668 149.4
B 0 199 56888 376.23 693 668 149.4
C 6 223 121068 639.51 681 675 188.3
C 14 96 106755 563.48 681 675 188.3
C 1 16 78576 413.8 681 675 188.3
D 11 129 910417 4740.17 670 640 191.9
D 8 245 123988 642.67 670 640 191.9
D 7 129 68995 356.15 670 640 191.9

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