ASTROSAT CZTI

Data Quality Report

Orbit 55767

Creation date: 2026-01-19T13:52:41.897387
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_55767cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55767cztM0_level2_quad_clean.evt
Size (bytes)714,991,68085,026,240
Size681.9 MB 81.1 MB
Events in quadrant A11,961,461330,956
Events in quadrant B3,088,232681,595
Events in quadrant C3,356,271618,998
Events in quadrant D7,548,201482,893

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0400942
B0141272
C0149752
D0269984

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0190
C0190
D0190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6604354253.634161%
B66041452.195639%
C66041652.498486%
D6603135220.475541%

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 7645 6604 3296 3296 43.11% 49.91%
B 7645 6604 4 4 0.05% 0.06%
C 7645 6604 111 111 1.45% 1.68%
D 7644 6604 1373 1373 17.96% 20.79%

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 9034243 65305.95 562 547 138.3
A 7 64 222575 1605.07 562 547 138.3
A 8 192 162529 1170.99 562 547 138.3
B 5 172 110045 711.92 709 682 153.6
B 0 199 104211 673.94 709 682 153.6
B 4 206 22865 144.4 709 682 153.6
C 10 22 392417 2041.6 698 690 191.9
C 1 16 101463 525.21 698 690 191.9
C 9 38 34965 178.63 698 690 191.9
D 7 70 3529136 19222.05 650 619 183.6
D 11 129 1259301 6856.83 650 619 183.6
D 8 160 65968 356.0 650 619 183.6

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